During an investigation, a scientist heated 123.6 g of copper carbonate till it decomposed to form a black residue. The total mass of the black residue formed was 79.6 g. Does the law of conservation of mass hold true in this case?
Answer:
When copper carbonate is heated, it decomposes to form a black residue. This black residue is actually copper(II) oxide. Along with this black residue, carbon-dioxide is released.
The law of conservation of mass holds true. 123.6 g of copper carbonate decomposes to 79.6 g of copper oxide and (123.6 g-79.6 g=44 g) 44 g of carbon-dioxide.
A truck accelerates at 5m/s2. Find the truck's mass if the driver applies a force of 425N(can you also show free diagram)?
How are galaxies organized and distributed within the universe
Answer:
The answer is: Many are associated in pairs, trios, groups or clusters, and their distribution in filamentary structures.
Explanation:
Galaxies rarely appear isolated and their distribution in the Universe is not uniform. Many are associated in pairs, trios, groups of some tens or clusters of up to a few thousand. These groups are held together by gravitation.
The large-scale distribution of galaxies seems to indicate that they are concentrated along large filamentary structures.
The answer is: Many are associated in pairs, trios, groups or clusters, and their distribution in filamentary structures.
A package of supplies is to be dropped from an airplane so that it hits the ground at a designated spot near some campers. The airplane, moving horizontally at a constant velocity of 130 km/h, approaches the spot at an altitude of 0.520 km above level ground. Having the designated point in sight, the pilot prepares to drop the package. (a) What should the angle be between the horizontal and the pilot's line of sight to the drop point when the package is released? (Neglect air resistance)
Select all that apply. The three types of rock in the Earth's crust are _____.
igneous
basalt
limestone
granite
metamorphic
sedimentary
Final answer:
The Earth's crust is composed of igneous, metamorphic, and sedimentary rocks, examples of which include granite (igneous), basalt (igneous), and limestone (sedimentary).
Explanation:
The three types of rock in the Earth's crust are igneous, metamorphic, and sedimentary. Igneous rocks, like granite and basalt, form when magma or lava cools and solidifies. Sedimentary rocks form from the compaction and cementation of various substances, including pre-existing rock fragments or mineral precipitation. Limestone is an example of a sedimentary rock formed from precipitated minerals. Metamorphic rocks arise from the transformation of existing rock types through heat and pressure, resulting in a change in mineral composition or structure.
If this experiment is repeated at a place 10 kilometers above the sea-level, the acceleration due to gravity g (exp) is expected to:
a. increase.
b. decrease.
c. remain constant.
The acceleration due to gravity, or g (exp), will decrease if the experiment is conducted 10 kilometers above sea level. This is because the force of gravity reduces as you move further from the Earth's surface.
Explanation:The acceleration due to gravity, or g (exp), is expected to decrease if the experiment is repeated at a place 10 kilometers above the sea-level. This is because the force of gravity decreases as the distance from the center of the Earth increases.
Essentially, the further you move away from the Earth's surface, the weaker the gravitational force gets. This is due to the fact that gravity is dependent on distance. So, being 10 kilometers above sea level would result in a slightly lower acceleration due to gravity.
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Explain one way the water cycle affects climate. Use 3-4 Sentences to explain. (Complete sentences)
Answer:
The water cycle will affect the climate by causing rain and snow.
Explanation:
if temperatures increase more rainfall will occur because more water evaporates in the air.
If the amplitude of the resultant wave is twice as great as the amplitude of either component wave, and this wave exhibits reinforcement, the component waves must
A. have a different frequency than the resultant wave.
B. be in phase with each other.
C. be traveling in the opposite direction of the resultant wave.
D. have a different wavelength than the resultant wave.
Answer: B-be in phase with each other
If the amplitude of the resultant wave is twice as great as the amplitude of either component wave, and if this wave exhibits reinforcement, the component waves must be in phase with each other.e
explain why a fast moving freight train cannot be stopped quickly
Why is it more important to monitor your word choice in a professional environment
When analyzing the results of a scientific experiment, Kevin should base his conclusion on
Answer:
the empirical evidence that is collected during experiment.
Explanation:
When analyzing the result of any scientific experiment, we should base our conclusion on the evidences during process of the experiment. Because conclusion of any experiment describe the important things we noticed during experiment and all such steps are combined and give us the result of experiment. so Kevin should base his conclusion on the empirical evidences during experiment.
(5th grade work) why Is light refracted as it travel from one transparent medium to another
which factor has the least impact on the potential energy or kinetic energy of an object
Which of the following elements has the highest atomic mass?
1. Helium: 2 protons and 2 neutrons
2. Nitrogen: 7 protons and 7 neutrons
3. Oxygen: 8 protons and 8 neutrons
4. hydrogen: 1 proton and no neutrons
Answer:
Oxygen has the highest atomic mass out of all the four elements.
a substance that contains only one kind of matter is known as a (n)
is the following sentence true or false.. winds blowing inland from oceans carry less water than winds blowing from land
a soccer ball is kicked with a speed of 15.6m/s at an angle of 32.5 degrees above the horizontal. If the ball lands at the same level from which it was kicked for what amount of time was it in the air?
Answer:
Time of flight, t = 1.71 seconds
Explanation:
It is given that,
Speed of the soccer ball, u = 15.6 m/s
Angle made with the horizontal, [tex]\theta=32.5^{\circ}[/tex]
Let t is the time for which the ball was in the air. The time duration for which the ball is in air is called the time of flight of the projectile. It is given by :
[tex]t=\dfrac{2u\ sin\theta}{g}[/tex]
[tex]t=\dfrac{2(15.6)\ sin(32.5)}{9.8}[/tex]
t = 1.71 seconds
So, the ball was in the air for 1.71 seconds. Hence, this is the required solution.
To find the amount of time the soccer ball was in the air, we can break the initial velocity of the ball into its horizontal and vertical components. The time in the air can be calculated using the vertical velocity component and the vertical distance traveled.
Explanation:To find the amount of time the soccer ball was in the air, we can break the initial velocity of the ball into its horizontal and vertical components. The horizontal component will remain constant throughout the motion, while the vertical component will change due to the force of gravity.
Using the initial velocity of 15.6 m/s and the angle of 32.5 degrees above the horizontal, we can find the vertical velocity component using trigonometry. The vertical velocity component is given by Vy = V * sin(θ), where Vy is the vertical velocity, V is the initial velocity, and θ is the angle above the horizontal.
With the vertical velocity component, we can calculate the time the ball was in the air by dividing the vertical distance it travels by the vertical velocity. Since the ball lands at the same level, the vertical distance can be assumed to be zero. Therefore, the time in the air is given by Δt = 2 * (Vy / g), where Δt is the time in the air, Vy is the vertical velocity component, and g is the acceleration due to gravity (approximately 9.8 m/s²).
how is interia related to Newton's first law of motion
Final answer:
Inertia is the property of an object to maintain its state of motion or rest unless acted upon by a net external force, as described by Newton's first law of motion. This law, also known as the law of inertia, indicates that an object will continue in its state of constant velocity unless a force causes a change.
Explanation:
How is Inertia Related to Newton's First Law of Motion?:
Inertia is directly related to Newton's first law of motion, often referred to as the law of inertia. Newton's first law states that a body at rest remains at rest, and a body in motion remains in motion at a constant velocity unless acted upon by a net external force. This tendency of an object to resist changes in its state of motion or rest is known as inertia. Essentially, inertia is the reason why an object remains at rest or carries on moving at the same speed in a straight line unless a net force acts upon it.
Newton's laws are fundamental in the study of motion under the influence of forces, particularly in inertial frames of reference. Forces, which are described by Newton's laws, are always vectors with both magnitude and direction, and arise from interactions among objects. Newton's first law serves as a definition of an inertial frame of reference, and thus, any frame where the law is valid is considered inertial.
A dog is sniffing around for a bone. He walks 3.6 m east and 6.0 m north. What are the magnitude and direction of the dog from his original position?
If you opened the valve on a bicycle tire, what would happen to the air inside of the tire? Why do you think that would happen. I need a full explanation in the science version.
If you opened the valve on a bicycle tire, the air inside of the tire will come out and the pressure it exert will be less.
Why does the air filled in a bicycle to keep it tight?When air is pumped into a bicycle tube, the tube gets inflated due to the air pressure exerted by the collisions of gas molecules in air with the inner walls of the rubber tube. This air pressure makes the tyres feel hard.
What causes air pressure to decrease in tires?When the temperature cools down, the air within the tire shrinks. In the same way, when the temperature rises, the air within the tire expands.
Due to the air being compressed in a small space, the air is pressurized and when the valve is open it causes a loss in pressure making the air gush out.
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which is an element A. titanium and carbon in an alloy B. oxygen and nitrogen joined together C. a water molecule D. a piece of pure nickel
ps its science
Emily sprains her ankle on her way home from school. Her mom suggests she use an “instant cold pack” to reduce the swelling. When Emily’s mom hands her the cold pack, it is room temperature. The instructions on the pack tell Emily to pop a button inside the ice pack to open a packet of chemicals. Once Emily has popped the button, she notices that the cold pack immediately gets cold. She places it on her swollen ankle. Write a thoughtful and complete response (3+ sentences) that describes what happened to the energy as it is first in the cold pack (before Emily pops the button), then when she pushes the button, and then after Emily has placed the cold pack on her ankle. Discuss transfers and transformations of the energy.
The fastest speed in the universe is the ____________ _____ ______________.
a player passes a basketball to another player who catches it at the same level from which it was thrown. the initial speed of the ball is 7.1m/s and it travels a distance of 4.6m. What were (a) the initial direction of the ball and (b) it's time of flight?
The basketball is thrown horizontally and the time of flight is approximately 0.648 seconds.
Explanation:In this problem, a basketball is passed from one player to another at the same level. The initial speed of the ball is 7.1 m/s and it travels a distance of 4.6 m. To determine the initial direction of the ball, we need to consider that the ball is caught at the same level from which it was thrown, meaning it has no vertical displacement. Therefore, the initial direction of the ball is horizontal.
To find the time of flight, we can use the equation:
time = distance / speed
Plugging in the values given:
time = 4.6 m / 7.1 m/s = 0.648 s
So, the time of flight of the ball is approximately 0.648 seconds.
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The strength of the electric field of a charged particle becomes greater as the distance from the particle increases. True or false
The strength of the electric field of a charged particle becomes greater as the distance from the particle increases. this statement is False.
What is electric field ?Electric field is field around electrically charged particle where columbic force of attraction or repulsion can be experienced by other charged particles. It is denoted by letter E and it's SI unit is V/m Volt per meter or N/C newton per coulomb. Electric field comes inward to the center of the negative charge and it is going outward for positive charge. Electric field E is given by E = F/q where F is columbic force experienced by the unit charge.
Electric around a charge having magnitude q is given by
[tex]E = \frac{1}{4\pi r^{2} } \frac{q}{r^{2} }[/tex] where r is the distance from the center of the charge.
from formula we can see that as distance increases electric field decreases because electric field is inverse function of distance r.
Hence above statement is false.
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What does the force diagram look like for a book at rest on a desk?
What is the unit of measure for density?
Answer:
g/cm^3
Explanation:
grams is the unit of mass and cm cubed is the unit of volume.
the equation for density is mass over volume (d=m/v)
What makes silver and gold different by using the terms atom and element
The difference between silver and gold is that they are different elements with different atoms.
An atom is the smallest unit of matter that retains all the properties of an element. Gold atoms cannot be broken down into anything smaller while still retaining the properties of gold.
An atom is the smallest unit of matter that retains all of the chemical properties of an element. Gold atoms cannot be broken down into anything smaller while still retaining the properties of gold. Gold is classified as an element, which means it is a substance composed of only one type of atom.
Scientific experiments are specially designed to test explanations for an observed phenomenon. A student decides to conduct an experiment to determine the effect that the amount of time spent in the sunlight has on the overall growth of a plant. The student will conduct the experiment using two identical plants that will only spend different amounts of time in the sunlight. All other aspects needed for growth will remain identical for each. In the experiment described, what would the amount of water given to each plant be considered? a. an observation b. a dependent variable c. an independent variable d. a control or constant
Answer:
D. a control or constant
Explanation:
Just took it
The amount of water given to each plant would be considered an independent variable. Therefore option C is correct.
An independent variable is a factor that the researcher deliberately manipulates or changes in an experiment to observe its effect on the dependent variable.
In this case, the independent variable is the amount of time spent in the sunlight. The researcher intentionally varies the exposure to sunlight between the two plants.
Therefore, the amount of water given to each plant is a control or constant, while the amount of time spent in the sunlight is the independent variable in this experiment.
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Which term describes the relationship between wax and wane
The term that describes the relationship between wax and wane is "phases." Waxing and waning refer specifically to the phases of the Moon.
The term that describes the relationship between wax and wane is "phases." Waxing and waning refer specifically to the phases of the Moon. The Moon goes through a repeating cycle of phases, transitioning from a new moon (not visible) to a waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, third quarter, and finally waning crescent before returning to a new moon again.
Waxing describes the Moon's illumination increasing while waning describes the Moon's illumination decreasing.
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