Explain what it mean to say that energy is conserved

Answers

Answer 1

Answer:
It really means that the total amount of energy in the universe is
a fixed number, and doesn't change.

So if you're watching what's going on in some fixed bottle, box, pot,
or other volume, 'conservation' means that no energy can magically
appear in the bottle or disappear from it. The total amount of energy
can't change. The energy can only move from one place to another.
So if you see the amount of energy change inside there, then you
know that either some of the original energy must have leaked out
and escaped, or else more energy came in from somewhere.

This is actually a very powerful thing to know. It helps solve a lot
of problems.

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A 1,000 kg ball traveling at 5 m/s would have kinetic energy

Answers

Answer:

12500 J = 12.5 kJ

Explanation:

Kinetic energy is the energy possessed by a moving object solely due to its motion.

You can get the K.E. of an object using the equation,

K.E. = (1/2)mv²

So you get, for ball

K.E. = (1/2)×1000×5² = 12500 J = 12.5 kJ

what does it mean for data to be reproducible? how would you conduct an experiment in such a way as to get data reproducible?

Answers

Answer:

Explanation:

If there are n number of groups in an activity and the data produced among them is copied or is same then it is termed as reproducible.

To have an experiment that gives a reproducible data there are few key points which we need to keep in mind.

1- The circumstances provided for every group should be same.

2- Each group must be selected in such a way that participants must have same set of thought processing and mind set toward the situation.

Reproducible is the term where your answers are similar to other groups. If every other group has similar results as yours (only if you use the same measurements) your results are reproducible. If your results are different to every other group your results aren't reproducible.

If the mass of Mars is 0.11 ME (mass of Earth) and its radius is 0.53 RE (radius ofEarth), How much is the gravitational field g at the surface of Mars?
Given: ME=6.0x1024 kg and RE=6.4x106m

Answers

Answer:

3.8 m/s²

Explanation:

g = GM / R²

g = G (0.11 ME) / (0.53 RE)²

g = 0.39 G ME / RE²

g = 0.39 (9.8 m/s²)

g = 3.8 m/s²

Answer:

vote me brainliest! Please!

simple put is 3.8 m/s²

took it on edge 2020

The force against a solid object moving through a gas or a liquid

Answers

This drag force is always opposite to the object's motion, and unlike friction between solid surfaces, the drag force increases as the object moves faster.

What is the amount of space occupied by an object?

Answers

That's called the "volume" of the object.

While watching a recent science fiction movie, one Klingon spaceship blows up a Droid spaceship with a laser gun. The Klingon crew watches out the port window and covers their ears to muffle the noise from the explosion. Scientifically, this scene is inaccurate because A)
light can not reflect off objects in the vacuum of space.

B)
they would not be able to see anything outside the window.

C)
lasers can not be transmitted through the vacuum of space.

D)
the sound of the explosion would not be transmitted back to their ship.

Answers

Answer:

D) the sound of the explosion would not be transmitted back to their ship.

Explanation:

Sound is a mechanical wave. A mechanical wave requires a medium to travel and transfer energy. It travels be compression and rarefaction of the medium. Since in space it is vacuum, the sound energy by the explosion of the spaceship would not be able to travel through the space, the Klingon crew are not required to cover their ears to muffle the noise. This scene would be inaccurate scientifically.

D. is the right answer because his pressure is very bad out there in the air.good luck

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When the speed of the bottle is 2 m/s, the KE is _____ kg m2/s2. When the speed of the bottle is 3 m/s, the KE is _____ kg m2/s2. When the speed of the bottle is 4 m/s, the KE is _____ kg m2/s2. When the speed of the bottle is 5 m/s, the KE is _____ kg m2/s2.When the speed of the bottle is 6 m/s, the KE is _____ kg m2/s2.(it dident have the subject so i just picked something that deals with science)