a body whose mass is 40kg runs up a flight of 30steps, each 150mm high in 6 seconds. Find the average power developed

Resistance of a conductor is directly proportional to length. True or False

You drop an object from a second floor window. Describe the speed of the object after 1 second

Suppose you observe two stars and you know they have the same luminosity. If one star is ten times closer than the other, the closer star will appear how many times brighter?

Which statements are explained by Newton's law of universal gravitation? A) Heavier objects fall faster than lighter objects. B) The strength of Earth's gravity decreases as an object gets farther from Earth.

Mary walks a certain distance up a road that climbs a hill. The vertical component of her displacement is 17.63 meters, and the horizontal component of her displacement is 100 meters. What is the road's approximate angle of inclination?

Which is the correct order from the closest to the sun to the farthest away from the sun? A. terrestrial planets, asteroid belt, gas planets, Kuiper belt B. gas planets, asteroid belt, terrestrial planets, Kuiper belt C.

Ethylene (C2H4) reacts with oxygen gas to produce carbon dioxide and water. 45.0 grams of ethylene reacts, how many grams of carbon dioxide gas will be produced?

What causes ice to melt and water to boil

A block of mass 3.5 kg slides down a frictionless inclined plane of length 6.4 m that makes an angle of 30 degrees with the horizontal. if the block is released from rest at the top of the incline, what is its speed at the bottom

What is the wavelength of an earthquake wave if it has a speed of 5 km/s and a frequency of 10 Hz?