How many galaxies exist?

Choose the best answer to the of the following. Explain your reasoning with one or more complete sentences.

This energy transformation diagram represents the energy of a boulder, initially positioned on top of a mountain. As it falls, its original gravitational potential energy is converted to kinetic energy and air friction.

Thermal energy depends on an object s a. mass. b. phase (sold, liquid, or gas). c. temperature. d. all of the above

Solar energy is: expensive renewable inefficient during winter all of the above

In which group is hydrogen located on the periodic table?

A box with a mass of 100.0 kg slides down a ramp with a 50 degree angle. What is the weight of the box? N What is the value of the normal force? Round the answer to the nearest whole number.

How does thermal energy heat a house? What devices and systems are involved?

A skater with an initial speed of 7.68 m/s stops propelling himself and begins to coast across the ice, eventually coming to rest. Air resistance is negligible. (a) The coefficient of kinetic friction between the ice and the skate blades is 0.105.

A. A PH202 student lives next to a construction site and sees a crane with a wrecking ball demolish the building next door. The wrecking ball swings along the wall between her house and the neighbor's house.

Sometimes when you are training for event you may notice a decrease in improvement in level out of performance true or false