How many known planets are in our galaxy?

The Intensity of solar radiation at the Earth's orbit is 1370 W/m^2. However, because of the atmosphere, the curvature of the Earth, and rotation (night and day), the actual intensity at the Earth's surface is much lower.

At a wedding reception, you notice a small boy who looks like his mass is about 25 kg running part way across the dance floor, then sliding on his knees until he stops. If the kinetic coefficient of friction between the boy's pants and the floor is.

Explain the law of conservation of momentum.

a zookeeper had a difficult time moving the elephant back inside for the evening. The elephant is difficult to move because a. It has unbalanced forces acting on it. b. It has high a high amount of momentum. c. It has balanced forces acting on it. d.

You run 100 meters in 15 seconds. What is your speed in m/s?

The bulk of peoples dreams occurs during what following state?

1. Which of the following lists minerals in order of hardness from lowest to highest on the Mohs hardness scale? A. Gypsum, apatite, topaz, feldspar, corundum B. Fingernail, penny, glass, topaz, diamond C.

The mass of a subway car and passengers is 45,500 kg. If it's acceleration as it leaves a station is 0.6 m/s2, what is the net force (in N) acting on it?

Which of the following determine an object's velocity? A. speed and direction B. direction and acceleration C. speed and mass D. speed, direction, and acceleration

The following statements regarding the exhaust gas recirculation (EGR) valve are all correct except: Low restriction exhaust systems will have no effect on EGR system operation. B.