A boy is running a 100 m relay. What is main kind of energy does he possess at this time.

a) gravitational

b) kinetic

c) elastic potential

A motorbike accelerates from rest at 12m/s in 3s on a level road. If the force is 3000n what is the total mass of the cyclist and the motorbike?

I usually walk at a speed of 0.75 miles per 30 minutes. How long will it take me to walk from my house to the supermarket 1.5 miles away?

Given a die, would it be more likely to get a single 6 in six rolls, at least two 6s in twelve rolls, or at least one-hundred 6s in six-hundred rolls?

A person behind a moving siren will interpret the frequency of the siren as being

What does the angular momentum quantum number determine? What does the magnetic quantum number determine? What does the principal quantum number determine?

What organelle is found in all animal cells and some plant cells

Basic of Archimedes's principle of how fluid can make body to float and sink.

A bullet is accelerated down the barrel of a gun by hot gases produced in the combustion of gun powder. What is the average force (in N) exerted on a 0.0500 kg bullet to accelerate it to a speed of 625 m/s in a time of 1.10 ms (milliseconds)

Your boss at the Cut-Rate Cuckoo Clock Company wants to save money on materials. You are asked to reduce the balance wheel, which is cylindrical, dimensions to one-third their original values.

Which of the following conditions is not necessary to observe an interference pattern between two sets of waves? A) The waves must have the same wavelength. B) The waves must have a constant phase difference.