Answer: The Velocity Decreased
Explanation: e2020 answer
The magnitude of the final velocity for G1 + G2 will be less than any initial velocity because ; The velocity decreased ( A )
when the mass of an object on motion is increased by the addition of additional weight on the object, the velocity of the object on motion will start to decrease ( i.e. deceleration )
Therefore the magnitude of the final velocity for G1 + G2 will be less than the magnitude of their initial velocities as they experience an increase in mass, respectively.
Hence we can conclude that The magnitude of the final velocity for G1 + G2 will be less than any initial velocity because ; The velocity decreased.
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A localized impediment to electron flow in a circuit is a:
resistor
source of emf
conduit
conductor
the second law of thermodynamics
Answer:
The Second Law of Thermodynamics states that "in all energy exchanges, if no energy enters or leaves the system, the potential energy of the state will always be less than that of the initial state." This is also commonly referred to as entropy.
Carbon can only form ionic compounds
Answer:
The answer is true.
Explanation:
1. This image shows the various forces acting on a block of rock situated on a rock slope. What does arrow 4 represent?
A. Shear strength
B. Gravitational force
C. Normal force
D. Shear force
Answer:
B. Gravitational force
Explanation:
The gravitational force of an object (also called weight) is given by
[tex]F=mg[/tex]
where m is the mass of the object and g is the acceleration of gravity, and it always points in the downward direction.
In this problem, the arrow labelled with 4 is the only force pointing downward: therefore, it must be the gravitational force.
The other arrows represent:
1 --> component of the gravitational force parallel to the plane
2 --> force of friction
3 --> component of the gravitational force perpendicular to the plane
please tell me the answer
Answer:
The magnets are repealing from each other is because the poles are the same on the magnets so they are pushing away from each other.
Explanation:
Magnets can either attract or repel each other. A permanent magnet is an object that produces a magnetic field around itself. It is this field that enables them to stick to each other and to some types of metal. Specifically, they stick to ferromagnetic materials like iron and things that contain iron, such as steel
Explanation:
A magnet is defined as a bar magnet that produces a magnetic field which attracts or repel other objects.
A magnet has both a north pole and a south pole.
As like charges repel each other and opposite charges attract each other. Similarly, like poles repel each other and opposite poles attract each other.
So, when south pole of a magnet comes in contact with north pole of another magnet then they will attract each other.
As the given image shows that magnets are away from each other this means that they are repelling each other.
Select the correct answer.
Anna will wear a black dress when she attends het cousin's wedding. Which color(s) does the dress absorb?
A.
all colors
B. no colors
C. red and green
D. white
Answer:
A: all colors, because black is the absence of color.
Explanation:
Answer:
The answer is option A
Explanation:
Hope it helps
One benefit of the SI system is that it is ____.
Answer:
One benefit of the SI system is that it is 'based on multiples of 10'.
Explanation:
One main benefit of the SI system is that it is based on multiples of 10. Which means that conversion to similar units is easier.
For example, you just need to multiply or divide by 10 to change from grams to kilograms and vice versa.
Also, the standard units defined by the International System of Units are consistent around the world which makes it easier to comprehend and communicate using them.
The SI system, or International System of Units, is beneficial because it is a universal and standardized system of measurement used worldwide in scientific domains. This avoid the need for unit conversion and ensures consistency in scientific communication.
Explanation:One benefit of the SI system, which stands for International System of Units, is that it is universal. This means it is widely used throughout the world in all domains of scientific measurement. It's a standardized system of measurement that uses seven base units, including the meter for length, the kilogram for mass, and the second for time, among others.
This makes it easier for scientists, researchers, and students alike to understand and communicate data without needing to convert units. Its universality and consistency make it a fundamentally important tool in many fields including physics, engineering, and chemistry.
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a crowbar of 2 meter is used to lift an object of 800N if the effort arm is 160cm , calculste the effort applied
Answer:
200 N
Explanation:
The crowbar is 2 meter, or 200 cm. The effort arm is 160 cm, so the moment arm of the object is 40 cm.
(800 N) (40 cm) = F (160 cm)
F = 200 N
How Antman can breathe when his size is smaller then oxygen molecules?
Which of the following changes will result in a stronger electromagnet?
A. Using fewer coils of wire
B. Using a higher voltage
C. Using a shorter nail
D. Using a longer wire
Answer:
B and D
Explanation:
The higher the voltage, the more current flowing and the better the magnetic field. Using a longer wire will result in more electric force around the nail, making it stronger.
The stronger electromagnet can be achieved using a high voltage than the actual.
Answer: Option B
Explanation:
The strength of the electromagnet depends upon the factors such as the current or voltage, then the number of coils present or the iron core. These all are directly influencing factors in respect to proportionality.
Out of the options given, using fewer coils will weaken the electromagnet. Using shorter nail will again weaken. Shorter wire would increase the strength. Therefore, the best suitable change is the use of higher voltage.
How much heat is needed to raise the temperature of 8grams of water by 19°C
Answer:
635.36J
Explanation:
The formulae to apply in this question is;
q=m*c*ΔФ where q is the heat needed, m is mass,c is specific heat capacity and ΔФ is change in temperatures
Given that;
m=8 g
ΔФ= 19°C - 0°C= 19°C
c=4.18J/g.°C
Substitute values
q= 8×4.18×19 = 635.36J
calculate the frequency of photon 434E-9 and speed of light 3E8m/s
Answer:
f = 6.912 E14 Hz
Explanation:
The speed of the wave is defined as
speed = wavelength*frequency
the frequency of the photon is defined as
f = speed / wavelength
f = 3 E8 m/s / 434 E-9 m
f = 6.912 E14 Hz
Answer:
Frequency, [tex]f=6.91\times 10^{14}\ Hz[/tex]
Explanation:
It is given that,
Wavelength, [tex]\lambda=434\times 10^{-9}\ m[/tex]
Speed of light, [tex]c=3\times 10^8\ m/s[/tex]
The frequency of photon can be calculated using following relation as :
[tex]c=f\times \lambda[/tex]
[tex]f=\dfrac{c}{\lambda}[/tex]
[tex]f=\dfrac{3\times 10^8\ m/s}{434\times 10^{-9}}[/tex]
[tex]f=6.91\times 10^{14}\ Hz[/tex]
So, the frequency of the photon is [tex]f=6.91\times 10^{14}\ Hz[/tex]. Hence, this is the required solution.
What is the electric potential at a point in space if a charge of 7.3 × 10-17 coulombs at that point has a potential energy of 6.4 × 10-17 joules?
Answer:
0.88 volts
Explanation:
We are given the amount of charge of a point ( 7.3 × 10^-17 ) along with its potential energy ( 6.4 × 10^-17 joules ).
We are to find the electrical potential at this point.
To find this, we will use the following formula:
[tex]V = \frac{Ep}{q}[/tex]
Substituting the given values in the above formula:
[tex]V = \frac{Ep}{q}V = \frac{6.4 * 10^{-17}\:J}{7.3 * 10^{-17}\:C}[/tex]
V = 0.88 volts
Answer:
V= 1.32 V
Explanation:
Electrical potential energy is calculated using the equation
Ue=1/2CV² where C is the charge and V the voltage at that point in space.
Making V the subject of the formula;
V= √( 2Ue /C)
V= √(2×6.4×10⁻¹⁷÷(7.3 × 10⁻¹⁷))
= 1.32 V
What is one advantage of using secondary sources when doing research?
Answer:
It saves time and cost nothing than to get the same information that would cost money.
The
force is the sum of all the forces that act upon an object.
the forces acting on an object is the net force or resultant force. ... Force is a vector and hence has both a direction and magnitude. For example, gravitational force (on earth) acts in downward direction and has a magnitude equal to mass of the object and acceleration due to gravity.
Answer:
Explanation:
The net force or resultant force is sum of all the forces act upon an object. As force is a vector quantity it has both magnitude as well as direction. so net force is calculated by keeping direction of application in mind such as friction force is always acts in the direction opposite to the motion of object and gravitational force always acts downwards.
A marble, a bowling ball, a basketball, and a baseball are rolling across the floor at 10 m/s. Which one has the greatest
kinetic energy?
the marble
the bowling ball
the basketball
the baseball
Answer:
The bowling ball
Explanation:
The kinetic energy of an object is given by:
[tex]K=\frac{1}{2}mv^2[/tex]
where
m is the mass of the object
v is its speed
In the problem, all the balls have same speed v: so their difference in kinetic energy will depend on their mass only.
We don't know the exact masses of the balls, however we can assume that the bowling ball has the largest mass among them: therefore, the bowling ball will also have the greatest kinetic energy.
The velocity of sound wave in air at 35°c is 353m/s, calculate the velocity of sound at 46°c
6. An article, which costs Rs. 850 is sold at a profit of 6%.
What is the selling Price ? -
a) Rs.900 b) Rs. 901 c) Rs. 890 d) Rs. 905
Answer:
b) Rs.901 is the selling price
Explanation:
selling price = cost price+profit percentage/100 x cost price
cost price = 850
profit percentage = 6%
selling price = 850+6/100 x 850 = 901
soln 2
if 100 % = 850
therefore what about 106% = ?
106 x 805/100 = 901
ans = 901
if you need any clarification or more explanation pls do mention on the comment section.i would like to help more
Hope this helps and if it does mark as branliest answer thx
The moon does not have atmosphere. Why?
Answer: It doesn't because it's not that big.
Explanation:
Answer:
One characteristic of the moon of Earth is that it basically has no atmosphere. The Earth has an atmosphere rich in Nitrogen and Oxygen but on the moon the surface is directly exposed to outer space. There are three reasons why the moon has no atmosphere. The primary reason is because the moon is too small. Compared to the Earth, the moon is about 1/4th the size. This reduces the amount of gravity on the moon. Strong gravity is needed to hold an atmosphere into place. With weak gravity, gases that are emitted from the surface quickly are lost to outer space. Another reason is because the moon does not currently experience plate tectonics and geologic upwelling. Plate tectonics allows for a recycling of crust and convergence and divergence of plates occurs and this leads to volcanoes and gases escaping at the boundaries. The moon is said to be geologically dead. There are currently no significant processes that allow for abundant gases to supply an atmosphere. The early moon may have had an atmosphere when it was geologically active but the crust of the moon is currently “frozen” into place and thus there are very little gases being emitted as compared to Earth. Another reason is because the moon is relatively close to the sun. This reason is tied closely to the moon having weak gravity. The solar wind from the sun helps strip away a weak atmosphere. Earth and Venus do not suffer the same fate since the gravity is high enough to hold the atmosphere in place. There are other moons in the outer solar system that are better able to hold an atmosphere due to being further away from the sun among other reasons.
Explanation:
Study the following reaction carefully. What classification should this reaction have?
4Al + 3O2 2Al2O3
synthesis
decomposition
single replacement
double displacement
Answer:
Synthesis reaction
Explanation:
Synthesis reaction: two or more compounds combine to form one.
A + B → C
Decomposition reaction: one compound forms two or more.
C → A + B
Single replacement reaction: an element in one compound is replaced with another element.
AB + C → AC + B
Double replacement reaction: elements in two compounds replace each other.
AB + CD → AC + BD
Which transfers heat from one object to another without transferring matter?
A. conduction
B. insulation
C. thermal expansion
Answer:
A. Conduction
Explanation:
Heat is transferred from one object to another but does not involve the movement of particles between the two objects. The only condition for this to happen is for the objects to be in contact. Contact ensures that adjacent particles transmit energy between them. It is measured in watts per meter per kelvin W/mK
Insulation prevents transfer of heat.
Thermal expansion is one effect of transfer of heat.
Conduction is one of the three ways to transfer heat, and one of the two ways to do it without transferring matter. (A)
What happens to light waves from a star as the star moves toward Earth?
A magnetic field applies forces on:
a)static charges
b)moving charges
c)water flow
Answer:
moving charges b)
I think this is the answer
Answer:
It is moving charges.
an object is acted upon by a force of 22 Newtons to the right and 13 Newtons to the left what is the magnitude and direction of the net force
22N to the right and 13N to the left
Forces are in opposite directions so you subtract the bigger force from the smaller force
Magnitude of force= 22N -13N
= 9N
net force direction is to the right
A heat engine is a device that uses
to produce useful work.
A heat engine is a device that uses the transfer of heat energy to perform useful work, and it can be found in car engines and steam turbines.
Explanation:A heat engine is a device that uses the transfer of heat energy to perform useful work. It extracts heat from a source and converts it into mechanical work that can be used for various applications. For example, a steam engine in an old-style train converts the heat energy from burning coal into the work needed to drive the train forward.
One of the important principles that govern the operation of heat engines is the second law of thermodynamics. This law sets a limit on the maximum percentage of the extracted heat energy that can be efficiently converted into work.
In summary, a heat engine is a device that utilizes heat transfer to produce useful work, such as car engines and steam turbines.
Final answer:
A heat engine is a device that converts heat into mechanical work, adhering to the principles of thermodynamics with limitations imposed by its thermal efficiency and the second law of thermodynamics.
Explanation:
A heat engine is a device designed to convert heat energy into mechanical work. This conversion is one of the fundamental processes in thermodynamics and is utilized in various applications. For instance, car engines, which are types of heat engines, use the heat generated from burning fuel to propel a vehicle. In another example, steam turbines that generate electricity use steam produced by heat to rotate blades and generate electricity. Such engines operate on cycles, where they repeatedly return to their original state by the end of each cycle. The thermal efficiency of a heat engine is determined by comparing the work output to the heat energy input; higher efficiency means more work is done with less wasted energy.
The operation of heat engines is governed by the laws of thermodynamics. The first law, also known as the conservation of energy, is applied to heat engines to ensure that energy is conserved throughout the process of converting heat to work. The second law of thermodynamics defines the limits of efficiency for these conversions by stating that not all absorbed heat can be transformed into mechanical work, as some energy is always lost, often as waste heat.
A student measured the density of gold to be 19.1 g/cm^3. The accepted value of the density of gold is 19.3 g/cm^3. What is the percent error of the student's measurement?
A. 0.20%
B. 1.71%
C. 1.04%
D. 1.39%
Answer:
C. 1.04%
Explanation:
The following information has been provided;
Actual density of gold; 19.3 g/cm^3
Observed/measured density of gold; 19.1 g/cm^3
The formula for percent error is given as;
((actual value - observed value)/actual value)) * 100
[tex]\frac{19.3-19.1}{19.3}*100=1.0363[/tex]
The percent error of the student's measurement is thus 1.04%
The percent error of the student's measurement is 1.04%.
Explanation:
The percent error of the student's measurement can be calculated using the formula:
Percent error = |(measured value - accepted value) / accepted value| * 100%
In this case, the student measured the density of gold to be 19.1 g/cm^3, while the accepted value is 19.3 g/cm^3. Plugging these values into the formula, we get:
Percent error = |(19.1 - 19.3) / 19.3| * 100% = 0.104 * 100% = 1.04%
Therefore, the percent error of the student's measurement is 1.04% (option C).
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when a sound's intensity increases by a factor of 10, its decibel reading increases by how many decibels?
Answer:
If sound intensity increases by a factor of 10, the decibel reading increases by 10.
Explanation:
Decibel scale:
In order to express levels of sound meaningfully in numbers that are more manageable, a logarithmic scale is used, rather than a linear one. This scale is the decibel scale. every increase of 3 dB represents a doubling of sound intensity.
Increase in decibel scale is given by the formula:
n = 10*log(Increased Intensity of sound/Original Intensity of Sound
n = 10*log(I/I₀)
In our case the sound intensity increases by a factor of 10. So I/I₀ increased by 10 times and will be 10 I/I₀
n = 10*log(10 I/I₀)
n = 10*log(10) + 10log(I/I₀)
n = 10 + 10*log(I/I₀)
This shows that the decibel reading is increased by 10 points.
Answer:
10
Explanation:
ANSWER ASAP 50 POINTS
Which of the following illustrates how a Venus fly trap senses that an insect has landed in its open leaves?
1. Using tiny hairs, the leaves sense a change in light.
2. Using tiny hairs, the leaves taste a chemical.
3. Using tiny hairs, the leaves detect a touch.
4. Using tiny hairs, the leaves sense a change in water levels.
Answer:It turns out the Venus flytrap is a power plant, capable of generating electrical signals. Each trap is actually a modified leaf: a hinged midrib, which would be the central vein of a more familiar leaf, joins the two lobes, which secrete a sweet sap to attract insects.
Explanation:The leaves of Venus' Flytrap open wide and on them are short, stiff hairs called trigger or sensitive hairs. When anything touches these hairs enough to bend them, the two lobes of the leaves snap shut trapping whatever is inside.
Answer:
The answer is #3
Explanation:
According to Newton’s first law of motion, which force is expected to cause a body to accelerate?
Answer:
Unbalanced force is expected to cause a body to accelerate.
Explanation:
Two friends are having a conversation. Anna says a satellite in orbit is in freefall because the satellite keeps falling toward Earth. Tom says a satellite in orbit is not in freefall because the acceleration due to gravity is not 9.80 m/2 . Who do you agree with and why?
Answer:
Anna is correct.
Explanation:
Anna is right as a satellite is in free fall because it keeps falling toward Earth, meaning that gravity is the only force acting on it. Tom is incorrect because an object does not have to accelerate at a certain speed to be considered to be in free fall. As long as gravity is the only force acting upon the object, it is considered to be in free fall.
From the conversation anna had with tom about the satellite in orbit, we can say that;
Anna is right because falling to the earth means being subject to only gravity which means a freefall.
In physics, freefall is defined as a scenario whereby when an object is in motion, the only force acting on it is that due to gravity. This means that it is basically weightless and has no normal force acting on it
Now, a satellite in orbit means that the satellite is accelerating towards the earth and as a result it would have an orbiting rate equal to the acceleration due to gravity. Thus, only force of gravity is acting on it.
Now, Anna said that a satellite in orbit is in free fall because it keeps falling toward Earth. From our earlier definition, she is correct because falling to the earth means being subject to only gravity which means a freefall.
Whereas, Tom is incorrect because he claims the object is not in freefall.
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