The addition of heat energy to a system always causes the temperature of that system to increase.

A 12500 kg railroad car travels alone on a level frictionless track with a constant speed of 17.0 m/s. a 5800 kg load, initially at rest, is dropped onto the car. what will be the car's new speed?

Suppose a scientific team is trying to recreate the energy-producing reactions tht occur in the sun. what would they need for the experiments?

A 38-kg canoe breaks free from its dock and floats downriver at a speed of 2.2 m/s. What is the momentum of the canoe? 48.0 m/s 76.0 kg m/s 83.6 kg m/s 0 m/s

Vibrations cause sounds yet if you move your hand back and forth through the air, you don't hear a sound. Why?

What are some of the benefits of learned optimism that have been found in research? O A. Fewer health problems O O B. All of these C. Making more money O D. A lower divorce rate

A stick is a connection of two same - diameter metal rod 5 cm, and a length of both stick is 0,6m. The thermal conductivity of the first rod 92 cal / s. m.°C, and the second stick 50 cal / s. m.°C.

you can produce a sound by plucking a string or by blowing in a pipe. how are these two ways different?

There are four springs stretched by the same mass. Spring A: 25 cm Spring B: 10 cm Spring C: 100 cm Spring D: 1 cm Which spring is the strongest? A B C D

Consider a rough asphalt roadway with 17 cm curbs and one 3.75 m lane in each direction and a 1.45 m shoulder on each side. The road has a longitudinal slope of 0.75% and is crowned in the center with a transverse slope of 2.25%.

An example of an opinion would be which of the following? bob s burgers is the best show on television. cake is appropriate for many occasions. earth is 238,900 miles from the moon. none of these