PHYSICS HIGH SCHOOL

When a baseball player throws a ball straight up, by how much does the velocity of the ball decrease each second

Answers

Answer 1
Answer:
It decreases 9.8 meters per second each second, until it reaches
its highest point and starts falling.  Then its speed increases
9.8 meters per second each second, until it hits the ground.

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A communist country decides to give its people more economic freedom in an attempt to improve its failing economy. What outcome is the government most likely worried about in this case?

Answers

the outcome that should make the government worry is: people would want more political freedom since communist governments have lots of limits of people's political freedoms. in communist system, we don't even choose our own jobs and the government will decide what we should produce and what knowledge that we're allowed to get

Answer:

The beliefs of communism, most famously expressed by Karl Marx, center on the idea that inequality and suffering result from capitalism. Under capitalism, private business people and corporations own all the factories, equipment and other resources called "the means of production." These owners, according to communist doctrine, can then exploit workers, who are forced to sell their labor for wages. This is what the government most likely would be worried about. Because economic freedom means growth of private business owners which also means exploitation of workers.

Which best describes how geothermal energy is used to make electricity? A.
Rocks are split to release energy that drives a steam turbine attached to an electrical generator.
B.
Heat energy from below the ground converts water to steam to drive a steam turbine attached to an electrical generator.
C.
Heat energy from below the ground drives liquid water though a turbine attached to an electrical generator.
D.
Heat energy from below ground heats and pressurizes air that drives a turbine attached to an electrical generator.

Answers

Heat energy from below the ground converts water to steam to drive a steam turbine attached to an electrical generator

The _______ the object, the _______ effect a force will have on its motion.A.
softer; less
B.
harder; less
C.
lighter; less
D.
heavier; less

Answers

The correct choice is D. But it's only correct if all the experiments are done on the same planet.

Suppose you had a feather, an orange, and a watermelon. Which of the following describes how quickly each of the objects will fall without air resistance, relative to the other two?a. All three objects will fall at the same rate.
b. The watermelon will fall faster than the other two.
c. The orange will fall the fastest, followed by the watermelon and then the feather.
d. The feather will fall faster than the orange, which will fall faster than the watermelon.

Answers

WITHOUT air resistance . . . like on the moon, or in a tank with all
the air removed from it . . . a feather, an orange, and a watermelon
will all fall at the same rate. 

So will a piece of tissue, a mosquito, school bus, a rock, and a cruise
ship. 

If you drop them all at the same time, then they will all hit the ground
at the same time.

Evidence gathered from publicly observable behavior is known as  _________ evidence.

Answers

Empirical because it is what you need to know the source of knowledge gather by observation or experimentation.

As an object increases in altitude, its mass: Decreases
OR remains the same

Answers

Answer:

Remains same

Explanation:

Mass of an object is measure of the matter it contains. It is independent of height. Commonly when we weigh something we measure its weight and not mass. Weight is a product of mass (m) and acceleration due to gravity (g).

As altitude changes, the amount of matter doesn't change thus the mass will remain constant. But due to the change in height the gravitational force will change and thus weight will vary.
No matter where you are, your mass stays the same. It's weight that changes. Also applies to any object.
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