Whats the best extersise routine for a 13 year old boy without weights and stuff

If you increase the mass of an object, but keep the force on it constant, its acceleration decreases? true or false

Where else might you expect to find metamorphic rocks like the vishnu schist of the grand canyon?

a boy hears the echo of his own voice from a distance hill after 0.8 seconds. If the speed of sound in air is 340m/s, calculate the distance of the hill from the boy.

Which one has larger kinetic energy: a 500-kg object moving at 40 m/s or a 1000-kg object moving at 20 m/s? a. The 500-kg object b. The 1000-kg object c. Both have the same kinetic energy.

The speed of sound in fresh water at 293k is 1482 m/s. At what temperature is the speed of sound in helium gas the same as that of fresh water at 293k? Helium is considered a monatomic ideal gas (y = 1.67 and atomic mass = 4.003u).

How was bohr atomic model similar to Rutherford's model

A rigid container filled with a gas is placed in ice. What will happen to the pressure of the gas? And what will happen to the volume?

A man is sitting on a 20 m height building and his mass is 50 kg. Calculate the mechanical energy.

Which of the following correctly describes which types of waves travel through which types of mediums? A) Transverse waves travel through solids, liquids, and gases.

Niko was hiking in the mountains when he found a spring, or a place where water naturally flows out of the ground. Where did the water in the spring come from? A. It is water that was squeezed out of an igneous rock when the rock changed. B.