The height of a horse is sometimes given in units of "hands." Why was this a poor standard of length before it was redefined to refer to exactly 4in.?

Which of earth's spheres contains all of the gases on the planet?

When atoms are split, they release energy. This concept applies to geothermal power, which is a renewable resource. hydrothermal power, which is a renewable resource. nuclear power, which is a non-renewable resource.

A shock wave first forms when an object ___ the speed of sound.

Suppose you squeeze a sponge into a small ball. does the mass of the sponge change? Does it's density change?

Why is it inportant for scientists all over the world to use the same system of measurement

What is the weight of a 65 kg astronaut on mars?

When lava cools, what type of Rock forms?

A uniformly charged conducting sphere of 1.1 m diameter has a surface charge density of 6.2 µC/m2. (a) Find the net charge on the sphere. (b) What is the total electric flux leaving the surface of the sphere?

A blow-dryer and a vacuum cleaner each operate with a voltage of 120 V. The current rating of the blow-dryer is 12 A, while that of the vacuum cleaner is 5.7 A. Determine the power consumed by (a) the blow-dryer and (b) the vacuum cleaner.

4. A 40 kg child and a 30 kg child want to balance themselves on a 4 meter, 50 kilogramn see-saw. Where should the fulcrum be placed?