How much heat is needed to condense 22.25 grams of nitrogen gas at - 195.8°C? The latent heat of vaporization of nitrogen is 199.0 J/g.

A 2 feet piece of wire is cut into two pieces and once a piece is bent into a square and the other is bent into an equilateral triangle. Where should the wire cut so that the total enclosed area by both shapes is at the maximum?

Which is greater, the gravitational force between earth and the moon, or the force between earth and the sun?

1. Describe what the law of conservation of energy states

Many studies on the homeless count the number of people who use what? A. Public restrooms B. Section 8 vouchers C. Homeless shelters D. Campgrounds

A fire is burning in a fire place where is the convection A. you touch the warm bricks next to the fireplace B. the fire heats the bricks at the bottom of the fireplace C. heat is rising up the chimney

A star has a mass of 1.36 x 1030 kg and is moving in a circular orbit about the center of its galaxy. the radius of the orbit is 2.1 x 104 light-years (1 light-year = 9.5 x 1015 m), and the angular speed of the star is 1.1 x 10-15 rad/s.

Floating in deep space, you find yourself at rest next to a small asteroid. You reach out and tap the asteroid with a hammer. What happens to you in this process?

You walk forward at 1.5 m/s for 8s. Your friend decides to walk faster and starts out at 2.0 m/s for the first 4 s. Then she slows down and walks forward at 1.0 m/s for the next 4s. Make a distance-time graph of your motion and your friend's motion.

If the coolant in a refrigerator was not compressed back into a liquid after it flowed through the refrigerator what would happen

A electric model train travels at 0.339 m/s around a circular track of radius 1.75 m. How many revolutions does it perform per second, i. e, what is the motion's frequency?