The radius of earth is 6,370,000m. Express this measurement in km in scientific notation with the correct number of significant digits.

Why does earth not have similar impact craters?

If there is an electric force of 5 newtons between two charged particles (q1 = + 10 C and q2 = + 10 C), how far apart are the particles?

How much thermal energy is needed to raise the temperature of 9.5 g of water to 10.0 c

A transformer is a device that has a primary and secondary coil and is used to change the voltage of electric current. True or False

As a vector, displacement has which qualities? magnitude only, direction only, magnitude and direction, neither magnitude or direction

A liquid filled sealed system has cylinders with movable pistons on each end. The face of one piston has an area of 5 cm². The other piston has an area of 500 cm² and is supporting a weight of 2 kN on it.

A turntable is spinning on a frictionless axle when a ball of putty is dropped onto it from above. The putty sticks to the turntable when it lands. Is angular momentum conserved for the turntable and putty (the system) during this process?

A cheetah can run from 0 to 70 mph in 2.2 seconds. what is the cheetah's top speed in m/s?

Which statement about how light travels is true? A Light waves need a medium to travel, and they travel at the same speed even if the light source is moving.

Explain why the car reaches a top speed even though the thrust Force remains constant at 3500N