Answer:
D. Is Zero
Explanation:
The acceleration on projectiles travelling through the air is only caused by gravity. This equal 9.81 m/s^2.
Other than gravity, there is no source of acceleration. Only air resistance causes projectiles of different surface areas to slow down at different rates.
As friction is not considered here (because no statement about surface areas of projectiles is given in the question), we do not need to consider it's effects and thus ONLY GRAVITY MATTERS.
Since gravity acting on both objects is equal, they have no acceleration relative to one another.
You are going 94.737 km/h or 26.316 m/s
speed = distance/time
look up a speed calculator if you have more problems like this, it’ll save you time :)
Answer:Its B
Explanation:Trust Me i done This Before
Answer:
The gravitational potential energy of the ball is more than 30 J.
Explanation:
Given that,
Gains kinetic energy = 30 J
We need to calculate the gravitational potential energy
According to law of conservation of energy
If there is no air resistance then the potential energy of the ball fully converted into kinetic energy.
If the air resistance is considered then the potential energy used to do work against air resistance.
According to question,
A ball drops some distance and gains 30 J of kinetic energy and considers air resistance then 30 J of potential energy can be loosed by the ball.
Hence, The gravitational potential energy of the ball is more than 30 J.
Answer:
The "2" tells us that there are 2 hydrogen atoms in this compound.
Explanation:
