Where did the heaven elements that make up the bulk of Earth originate:A In a supernova
B In meteorites
C In the Big Bang
D In the Earth itself
E In the Sun

Answers

Answer 1

Answer: the answer is b in the meteorites hope i helped

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A pencil is dropped from the roof of the school what is the speed after 3s down is the negative direction.I'm confused on what equation to use

Answers

On Earth, the acceleration due to gravity is (-9.8 meters per second) per second.

If the school, the roof, and the pencil are on Earth,
then after 3 seconds, the pencil's speed is

[ (-9.8 meters per second)/second ] times [ 3seconds ] = -29.4 meters per second

you have to use 1st equation of motion v = u +at as distance(s) is not given.....
as pencil is dropped from rest therefore u = 0m/s and accleration due to gravity is = -9.8 m/s
v = 0 - (9.8)(3)
v = -29.4 m/s

Instead of rolling down the ramp over the step, imagine the ball falls off the back of the ramp directly to the ground. What is the amount of potential energy remaining after the ball lands on the ground?

Answers

According to the law of conservation of energy, the potential energy is converted to kinetic energy. Remember, potential energy is calculated using height and weight. If the ball is on the ground, height is 0.

Assuming the ground has 0 height, than there would be no potential energy.

Convert the temperatures -30c 10c and 50c to Kelvin and Fahrenheit

Answers

To convert from Celcius to Kelvin just add 273

-30C + 273 = 243 Kelvin

10C + 273 = 283 Kelvin

50C + 273 = 323 Kelvin

To convert from Celcius to Fahrenheit is C * 1.8 +32

-30C * 1.8 + 32 = -22F

10C * 1.8 + 32 = 50F

50C * 1.8 + 32 = 122F

Hope that helps!

Which forces are interacting when a bowling ball is pick up ?a.gravity
b.inertia
c.apull
d.all of these

Answers

D all of the above. While the ball is being lifted, gravity is still pulling down and it is heavy so it is harder to lift.

Do you think that the universe has a starting point and ending point? explain.

Answers

Answer:

Explanation:

I don't think the universe has a starting and ending point because the universe is vast and has not been fully discovered. I think that the universe is endless because all of the stars, planets, and galaxy's have yet to be found and the end or start of the universe is also yet to be discovered so I think that the universe could go on forever.

Final answer:

The universe's starting point is believed to be the Big Bang about 13.8 billion years ago, but whether it has an ending point is still unknown.

Explanation:

The question of whether the universe has a starting point and ending point is a topic explored in the field of physics. According to the Big Bang theory, the universe began with a singularity approximately 13.8 billion years ago. However, it is currently unknown whether the universe will have an ending point.

One theory suggests that the universe will continue expanding forever, gradually growing colder and darker. Another theory proposes the possibility of a Big Crunch, where the universe would eventually collapse in on itself. Some scientists also speculate about the possibility of a cyclical universe, where the cycle of expansion and contraction repeats indefinitely.

It's important to note that these theories are still being studied and researched, and our understanding of the universe's origins and potential ending is continually evolving.