Coal is how much worse than natural gas when it comes to carbon dioxide emissions?

A 55-kg box rests on a horizontal surface. The coefficient of static friction between the box and the surface is 0.30, and the coefficient of kinetic friction is 0.20.

A 32-n force acts on a small mass in the positive x-direction. a 26-n force also acts on it in the negative x-direction. what is the equilibrant of these two forces?

Santa weighs 1781.8 N if the average chimney is 32 feet high how long (neglecting friction) does it take santa to get down the chimney? at what speed in m/s, km/hr, and mph, does santa hit the bottom?

What is true of any ferromagnetic material? A. it has two north poles B. It is difficult to magnetize C. It can be magnetized D. It is a magnet.

One easy way to reduce heating (and cooling) costs is to add extra insulation in the attic of a house. Suppose the house already had 15 cm of fiberglass insulation in the attic and in all the exterior surfaces. If you added an extra 8.

Why do atoms move at different speeds depending on wether they are liquids or solids

What are the arrangement of resistors in series

A cell provides 6 V to an LDR. The current through this LDR is measured and is found to be 3 A. What is the resistance of the LDR?

A car travels along eastward with a constant velocity. the magnitude of the acceleration of the car is

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