Answer: a network of several radio telescopes wired together
Explanation:
A radio interferometer combines signals of several radio telescopes which are used in astronomical observations simultaneously to simulate a discretely-sampled single telescope of very large aperture
Interferometer, an instrument that uses the interference patterns formed by waves to measure certain characteristics of the waves themselves or of materials that reflect, refract, or transmit the waves. Interferometers can also be used to make precise measurements of distance.
An external force of 5N is applied to a go-kart that is opposite it’s direction of travel for 5 seconds. What is the resulting momentum of the go-kart?
Options:
A: 25 kg m/s
B: 100 kg m/s
C: 975 kg m/s
Answer:
25N.s=25kgm/s
Explanation:
The resulting momentum in this case is equal to the impulse created by the force 5N during 5 seconds
ΔP=Force.time=F.t
= 5x5=25kgm/s
Can someone please help me ASAP?
Answer:
B
Explanation:
Answer:
Reduce the time required for work
Explanation:
A car is moving at constant speed on the
freeway. The driver sees a patrol car at time
ti and rapidly slows down by around 10 miles
per hour. After continuing at this speed for
a few minutes, the driver at time ty quickly
accelerates to the original constant speed.
Which graph correctly describes the car's
acceleration a(t) as a function of time? Take
the forward direction of motion as positive.
The graph that correctly describes the car's acceleration as a function of time is (c).
The graph that correctly describes the car's acceleration as a function of time is (c). In this graph, the acceleration has a constant value for a certain time interval, indicating constant acceleration. The slope of the velocity vs. time graph is constant during this interval.
The moon orbiting the earth, an apple falling, or a car stopping at a traffic light are a few instances of acceleration. These illustrations help us to understand that acceleration happens when a moving object changes direction or experiences a speed increase or reduction.
The acceleration unit in the SI is metres/second2 (m/s2). Newton's Second Law, which states that "The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass," establishes a relationship between force (F), mass (m), and acceleration (g).
Dark clothing feels warmer than white clothing on a sunny day. Which interaction causes the dark clothing to feel warm?
Explanation:
The darker the object, the better it emits heat, because it's a better absorber of light. On the other hand, a white object appears white because it reflects all the different wavelengths and absorbs little to no light.
Answer: Absorption
Explanation: Because the darker clothing absorbs the heat more than the lighter clothing beacuse of contrast i guess . A P E X
the goat weighs 900 N and is 1 meter from the fulcrum. The strongman pulls down on the lever 3 meters from the fulcrum. What is the smallest effort that the strongman can use to lift the goat.
Answer: The smallest effort = 300N
Explanation:
Using one of the condition for the attainment of equilibrium:
Clockwise moment = anticlockwise moments
900 × 1 = 3 × M
Where M = the weight of the strong man
3M = 900
M = 900/3 = 300N
Therefore, 300N is the smallest effort that the strongman can use to lift the goat
Answer:
Just over 300 N
Explanation:
Just over 300 N
Explanation: The goat is 1 meter from the fulcrum, and the strongman is 3 meters from the fulcrum. The mechanical advantage of the lever will be 3. The effort needed to lift the goat will be just over one-third the weight of the goat, in this case just over 300 newtons.
A bowling ball has an initial momentum of +30 kg m/s and hits a stationary bowling pin. After the collision, the bowling ball leaves with a momentum of +13 kg • m/s. What is the magnitude of the final momentum of the bowling pin if it has a mass of 1.5 kg? 0 kg • m/s 11 kg • m/s 17 kg • m/s 43 kg • m/s
Answer:
Momentum of the bowling pin is 17kgm/s
Explanation:
P(initial of ball)=+30 kg m/s
P(initial of pin)=0 because its velocity is 0
P initial = P final
30= P(ball) + P(pin)
30=13+P(pin)
P(final of pin)=+13 kg m/s and P(final of ball)= 30-13=17kgm/s
The scenario involves conservation of momentum. The bowling ball transfers momentum to the pin during collision, and the final momentum of the bowling pin is calculated to be 17 kg m/s.
Explanation:The scenario described in the question involves the principle of conservation of momentum. This principle, fundamental in physics, states that the total momentum of a system of objects is constant unless acted upon by an external force. Thus, the total momentum before the collision (initial momentum of the bowling ball) should equal the total momentum after the collision (final momentum of the bowling ball plus the momentum of the pin).
Given that the bowling ball has an initial momentum of +30 kg m/s and final momentum of +13 kg m/s, the momentum transferred to the pin is 30 kg m/s - 13 kg m/s = 17 kg m/s. This is the magnitude of the final momentum of the bowling pin.
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All of the following are examples of convection currents, except:
A. Warm air rising
B. Cold water sinking to the bottom of the lake
C. Water flowing through pipes
D. Steam from hot soup rising into the air
Answer: C.
Water flowing through pipes
Explanation:
Convection current is a type of heat transfer that occurs in liquids and gases.
It involves the physical movements of liquids or gases molecules. Convection happens when there is a difference in temperature between two parts of a liquid or gas. In convention, hot part of a fluid rises, and the cooler part sinks
Answer:
C
Explanation:
A large rock (representing Earth’s land) and a container of water (representing Earth’s water). What will MOST LIKELY happen when the rock and the water receive the same amount of heat energy from the sun?
The temperature of the water will rise faster.
The water will transfer heat to the rock.
The temperature of the rock will rise faster.
The rock will transfer heat to the water.
When a rock and water are heated by the sun, the rock's temperature rises faster due to its lower specific heat capacity compared to water, which requires more energy to increase in temperature. Additionally, energy is also used for water evaporation, and higher thermal conductivity in water distributes the heat over a larger area.
When a large rock and a container of water receive the same amount of heat energy from the sun, the temperature of the rock will rise faster than that of the water. This is because rock (or sand) and water have different specific heat capacities. The specific heat capacity is the amount of heat per unit mass required to raise the temperature by one degree Celsius. Sand and rocks have a lower specific heat capacity compared to water, meaning they need less energy to increase in temperature. Conversely, water, with a higher specific heat capacity, requires more energy to raise its temperature, so it heats up more slowly.
Additionally, when sunlight hits the Earth's surface, the energy is not just used for heating. In the case of water, some energy is used for evaporation, further reducing the amount of energy that goes into heating the water compared to rock. Lastly, the thermal conductivity of water is higher, which allows the energy absorbed to be transferred throughout the water, distributing the heat over a larger area and therefore taking longer for the temperature to rise.
Therefore, when both a rock and water are exposed to the same amount of sunlight, the temperature of the rock will likely increase more rapidly than that of water. This phenomenon explains why land areas heat up more quickly during the day compared to bodies of water.
How does water pollution in one area affect water and organisms elsewhere?
Answer:
Infectious diseases can be spread through contaminated water. Some of these water-borne diseases are Typhoid, Cholera, Paratyphoid Fever, Dysentery, Jaundice, Amoebas and Malaria. Chemicals in the water also have negative effects on our health.
Explanation:
Final answer:
Water pollution adversely affects ecosystems, leading to harmful effects like eutrophication and dead zones. Pollutants can accumulate in the food chain affecting human health, and contaminated waterways can disrupt recreation and drinking water quality.
Explanation:
Water pollution has significant repercussions on ecosystems and can lead to broad ecological consequences, affecting water quality and the organisms residing in and around affected areas. Notably, the pollutants either from point sources or nonpoint sources can lead to a chain of detrimental events. An example of this is eutrophication, which is an over-enrichment of water bodies with nutrients leading to excessive growth of algae and subsequent depletion of oxygen (anoxia), causing harm to various aquatic species.
Furthermore, the pollution can result in the accumulation of harmful substances, like mercury, within the food web, which potentially leads to the consumption of carcinogens by animals—including humans. The effects of water pollution are far-reaching; contaminated rivers can negatively impact recreational activities, drinking water supplies, and the overall health of the ecosystem. Specific instances, such as the Cuyahoga River catching fire, underpin the urgent need for better water management policies to prevent such environmental crises.
Agricultural practices also contribute to water pollution with runoff carrying pesticides and fertilizers that can cause algal blooms, resulting in dead zones—areas in water bodies where life cannot be sustained due to low oxygen levels. These impacts are often not confined to a single locality but can affect regions downstream and ultimately contribute to global environmental problems.
describe the minimum requirements for any electric circuit
Answer:
A power supply, wiring as a conductor. A switch controls current flow into a circuit.
Explanation:
please give brainliest
A large animal, such as a lion is made of
A.one large cell
B. b. ten or fewer cells
c. c. trillions of cells
D. d. No one can know the correct answer without looking closely at the individual
animal
Answer:
c. trillions of cells
Explanation:
Every animal has trillions of cells to function
The majority of animals have millions of cells, while various species have varying quantities. For example, there are more than 40 trillion cells in an adult human. Thus option C is correct.
What are the different cells are present in organism?The animal body contains a variety of cell kinds. Skin cells, muscle cells, blood cells, fat cells, nerve cells, sex cells, and stem cells are a few examples of common animal cell types.
Skin or epithelial tissue is composed of skin cells. The cells that make up muscular tissue are referred to as muscle cells.
All animals have numerous cells that work together to build the entire organism because they are multicellular. These cells in more complex species, like humans, may be highly specialized to carry out various tasks.
The lion, like all mammals and other creatures, is formed of eukaryotic cells, which contain DNA, ribosomes, and cytoplasm in addition to many other organelles.
Therefore, A large animal, such as a lion is made of trillions of cells.
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Determine the Net Force acting on the object (represented by the solid circle) in this diagram.
Answer:
200 N to the left
Explanation:
If we say left is negative and right is positive, then the net force is:
∑F = -300 N + 100 N
∑F = -200 N
The net force is 200 N to the left.
what word can be used to describe the compression of a longitudal wave
Answer:
Mechanical longitudinal waves are also called compressional or compression waves, because they produce compression and rarefaction when traveling through a medium, and pressure waves, because they produce increases and decreases in pressure.
Explanation:
Mechanical wave used to describe the compression of a longitudal wave.
What are mechanical waves?Mechanical waves are longitudinal waves that generate compressions along the medium they are travelling and transmit energy from one medium to another location of medium.
Therefore, Mechanical wave used to describe the compression of a longitudal wave.
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A pet owner dropped some new fish into a pond. Several species of fish lived in the pond, but within a few months, only members of the new
species survived. What best explains why this happened?
A
Too many fish caused an imbalance in the ecosystem, so the food web was affected.
B. All new species have an advantage in an ecosystem.
c. The new species was probably bigger than the other fish in the pond.
D. All of the species were dying out, and the new species was the last to survive.
Answer: A or C
Explanation:
A chemical reaction occurs when 2 white solids are stirred together. They turn into a slushy, white solid and the glass jar feels really cold. Energy is being _________ by the solids, which means this is an _______ reaction.
A) Released, exothermic
B) Absorbed, endothermic
C) Released, endothermic
D) Absorbed, exothermic
Answer:d
Explanation:
A chemical reaction occurs when 2 white solids are stirred together. They turn into a slushy, white solid and the glass jar feels really cold. Energy is being Absorbed by the solids, which means this is an Endothermic reaction. Hence option B is correct.
What is Endothermic and exothermic reaction ?Endothermic reaction is a reaction in which energy is absorbed from the surrounding in the form of heat. for example an ice cube takes energy from the surrounding and it melts to form liquid. In this melting of Ice energy is absorbed in the form of heat. In this process the phenomenon is going from high order(solid) to lower order(liquid), hence entropy is increasing in this case. Entropy is nothing but randomness of molecule.
Because of absorption of energy, change in enthalpy is negative.
Exothermic reaction is a reaction in which energy is released in the surrounding in the form of heat. for example bursting of firecracker gives sound and heat energy and its temperature is greater than surrounding. In this process Energy is released in the surrounding. In this case entropy decreases( solidifying of water into ice is also example of endothermic reaction).
Because of release of energy, change in enthalpy is positive.
Hence option B is correct.
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Match each word to its definition. (Picture should be included)
Answer:
flow of electric charges - current
opposition to the flow of an electric current - resistence
stored potential energy at the source of a circuit - voltag
Moon phases are named after the shape the moon resembles during that time. What is is called when the shape of the moon is between a half circle and a full circle. crescent semi-full three-fourths gibbous
A light bulb has a power rating of 60 W. What is the current running into it if it is plugged into a 120 V outlet?
Answer:
The electric current running into the light bulb is 0.5 A.
Explanation:
We have,
Power rating on a light bulb is 60 W
It is required to find the current running into it if it is plugged into a 120 V outlet. Let I is the electric current. The mathematical definition of power is given by :
[tex]P=VI[/tex]
I is electric current
[tex]I=\dfrac{P}{V}\\\\I=\dfrac{60}{120}\\\\I=0.5\ A[/tex]
So, the electric current running into the light bulb is 0.5 A.
Which two elements will most likely form an ionic bond? (Click on the periodic table icon to view these elements)
-krypton and lithium
-magnesium and silicon
-calcium and potassium
-iodine and chlorine
Answer:
-magnesium and silicon
Explanation:
The two elements that will most likely form an ionic bond are magnesium and silicon. The correct option is b.
What are ionic bonds?Ionic bonds are defined as those that are created when all of an atom's electrons completely transfer to another atom. Ionic compounds are those that contain ionic bonding.
The atom losing electrons in this bond formation is referred to as an electromotive atom, while the atom acquiring electrons is referred to as an electronegative atom.
In these compounds, ions with opposing charges are drawn to one another and combine to form a compound. Magnesium and silicon form a crystalline compound that is black, and these elements can form ionic bonds. The formula of magnesium and silicon is MgO₃Si
Therefore, the correct option is b, magnesium, and silicon.
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When a certain isotope, such as Pu-239, is hit by a neutron, it will always split
into the same smaller nuclei.
true or false?
Answer:false
Explanation:
Atoms don’t always fission the same way. You saw three different possible fission reactions for U-235
Answer: F
Explanation:
Mr.Brown’s class is learning about physics and chemical changes. After reading the passage, the students had to pick out the model of the physical change. Can you help them? Pick the correct model and give a reason for your choice.
A.
B.
C.
D.
Which of the following items involve a wedge?
Check all that apply.
A. A chisel
B. An axe
C. A knife.
D. A hairbrush
A chisel, an axe, and a knife all include wedges in their design, as they have tapered edges that are used to cut, split, or pierce materials. A hairbrush does not serve this function and is not a wedge.
A wedge is a simple machine that consists of a piece of material, typically metal or wood, with a sharp edge that tapers to a point or edge. It converts force applied to its blunt end into forces perpendicular to its inclined surfaces. The wedge is used to cut, split, or pierce other objects or materials. Based on the information provided:
A chisel is indeed a wedge as it is a hand tool with a blade that is struck with a mallet to cut or shape wood, stone, or metal.An axe is a tool with a wedge-shaped blade that is used to split or cut wood.A knife is a wedge with a sharp edge designed to cut or slice through materials.A hairbrush is not a wedge; it does not have a tapered edge used for cutting or splitting materials.Examples of other non-listed tools that function as wedges could include a screwdriver for opening cans, a garden fork for piercing soil, or a pair of pliers for gripping and cutting.
If the statement is true, select True. If it is false, select False.
If outside forces such as friction are negligible, when two objects of the same mass collide and do not stick together, the objects multiply velocities.
True
False
Answer:
false
Explanation:
Use the drop-down menus to complete each statement.
A cluster of atoms whose magnetic fields are aligned in the same d
The end of a magnet where the force is the strongest is the
The region where a magnetic force is exerted is the
A substance that is easily magnetized is a
Answer:
Magnetic Domain, Magnetic Pole, Magnetic Field, and Ferromagnetic Material
Explanation: I just got 100 in my assigment
A cluster of atoms whose magnetic fields are aligned in the same direction is Magnetic Domain.
The end of a magnet where the force is the strongest is the Magnetic Pole.
The region where a magnetic force is exerted is the Magnetic Field.
A substance that is easily magnetized is a Ferromagnetic Material.
What is Magnetic field?The magnetic field is the region of space where a charged object experiences magnetic force when it is moving.
When the atoms of an object having magnetic field in same direction is called magnetic domain.
When a charged object moves in the magnetic field of other object, the magnetic force is experienced.
The pole is the point where the magnetic force is maximum. Bar magnets has two poles.
A substance which is easily magnetized is the ferromagnetic material.
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The temperature of a gas is a measure of how hard its molecules hit the walls
of its container. true or false
Answer:
i might be wrong but i think its
FALSE srry if im wrong TwT
Explanation:
The statement is false; temperature measures the average kinetic energy of gas molecules, whereas pressure is related to the force and frequency of collisions against the container's walls.
The statement that the temperature of a gas is a measure of how hard its molecules hit the walls of its container is false. Instead, the temperature of a gas is proportional to the average translational kinetic energy of the gas molecules.
When the kinetic energy increases, the molecules move faster, which could lead to harder impacts and more frequent collisions with the walls of the container, but the temperature itself does not directly measure impact force. Conversely, pressure of a gas is related to the frequency and force of the molecules colliding with the container walls. The more collisions and the harder they are, the higher the pressure. These collisions are the resultants of the gases’ kinetic energy and the volume available for the gas molecules to move around.
Which phenomenon occurs when a wave encounters a non–transmitting barrier?
A.
refraction of the wave with a different wave speed
B.
reflection of the wave with a different wavelength
C.
reflection of the wave with the same wave speed
D.
refraction of the wave with a different wavelength
Answer:
C. Reflection of the wave with the same wave speed
Explanation:
Reflection occurs when waves bounce back from a surface they cannot pass through.
Reflection can happen with any type of waves, not just sound waves. For example, light waves can also be reflected. In fact, that’s how we see most objects. Light from a light source, such as the sun or a light bulb, shines on the object and some of the light is reflected. When the reflected light enters our eyes, we can see the object.
Reflected waves have the same speed and frequency as the original waves before they were reflected. However, the direction of the reflected waves is different. When waves strike an obstacle head on, the reflected waves bounce straight back in the direction they came from. When waves strike an obstacle at any other angle, they bounce back at the same angle but in a different direction.
When a wave encounters a non-transmitting barrier, it undergoes C. reflection with the same wave speed.
Explanation:Reflection is the process by which light, sound, or other waves bounce back when they encounter a boundary or obstacle. It's a fundamental phenomenon in physics and optics, used in mirrors, echo formation, and various technologies like radar and sonar for detection and imaging.
When a wave encounters a non-transmitting barrier, the phenomenon that occurs is a reflection of the wave with the same wave speed. This means that the wave bounces back off the barrier and continues moving at the same speed. The direction of the reflected wave depends on the angle at which the original wave hits the barrier, following the law of reflection.
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if a train is slowing down it is accelerating true or false
Yes, the statement is true. When a train is slowing down, it's experiencing a form of acceleration known as negative acceleration or deceleration.
Explanation:
That's a great question about the concept of acceleration. The answer is True. Acceleration in Physics is defined as the rate of change of velocity per unit of time. This change in velocity could be either an increase (speeding up) or a decrease (slowing down). When a train is slowing down, it's indeed undergoing a type of acceleration called deceleration, which is a negative acceleration.
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When a train is slowing down, it is indeed accelerating, but in a negative direction. This is known as deceleration, and while it means the object is slowing down, it is technically still considered acceleration in physics.
Explanation:The statement is true; when a train is slowing down, it is indeed accelerating - but in a negative direction. Acceleration, in physics, is a change in velocity, which includes either a change in its magnitude or direction. When the train slows down, the change in velocity is negative, and we refer to this as negative acceleration or deceleration. Even though the term 'deceleration' can sometimes cause confusion, from a physics standpoint, it's still considered acceleration because acceleration is a vector and has a direction associated with it.
As an example, let's take a look at a train moving with an initial velocity of 20 m/s. After some time, its speed drops to 10 m/s. Here, there's a negative change in velocity, so the acceleration will also be negative.
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ASAP NEED HELP PLEASE
A - 4.33 * 10 ^ - 6 C charge is 0.525 m from a -7.81 * 10 ^ - 4 C charge. What is their electric potential energy? ( include + or - ) ( unit J )
Answer:
57.91
Explanation:
The electric potential energy between the two charges is approximately 57.75 Joules.
To calculate the electric potential energy between two point charges, we can use the formula:
Electric potential energy (U) = k * |q1 * q2| / r
where:
k is Coulomb's constant ≈ 8.99 * [tex]10^9[/tex] N m²/C²
q1 and q2 are the magnitudes of the two charges (in Coulombs)
r is the distance between the charges (in meters)
Given:
q1 = 4.33 * [tex]10^(-6)[/tex] C
q2 = -7.81 * [tex]10^(-4)[/tex] C
r = 0.525 m
Now, let's calculate the electric potential energy (U):
U = (8.99 * [tex]10^9[/tex] N m²/C²) * |(4.33 * [tex]10^(-6)[/tex]C) * (-7.81 * [tex]10^(-4)[/tex] C)| / 0.525 m
U = (8.99 * [tex]10^9[/tex] N m²/C²) * |(-3.38 * [tex]10^(-9)[/tex] C²)| / 0.525 m
U = (8.99 * [tex]10^9[/tex] N m²/C²) * 3.38 * [tex]10^(-9)[/tex] C² / 0.525 m
U = (3.03362 * [tex]10^1[/tex] N m²/C²) / 0.525 m
U ≈ 57.75 J
The electric potential energy between the two charges is approximately 57.75 Joules.
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please answer i need help asap!!!
What is the relationship between frequency, wavelength, and speed of a wave?
The relationship between the frequency, wavelength & wave speed should be explained below.
Relationship between frequency, wavelength, and speed of a wave:Here the wave speed represents the distance where the wave should be traveled in the given value of time like the no of meters it travels per second. Also, the speed of the wave should be related to the length of the wave. Also, the equation of the wave frequency should be Speed = Wavelength * Frequency. In this, all three things should be interlinked with each other.
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