A train travels 120 km in 2 hours and 30 minutes. what is it average speed?

A cd has a mass of 17 g and a radius of 6.0 cm. When inserted into a player, the cd starts from rest and accelerates to an angular velocity of 21 rad / s in 0.8s, assuming the cd is a uniform solid disk.

How many electrons is there in the outer shell of nitrogen?

Ari uses a tool called calipers to measure the diameter of different cylinders he is using in an experiment. His old calipers could measure down to 0.01 mm, but his new calipers only measure down to 0.1 mm.

A car traveling 90 km/hr is 100 m behind a truck traveling 50 km/hr. How long will it take the car to reach the truck?

Explain where most of the mass of an atom is located. Also, explain why some particles that make up the atom do not contribute much to its mass.

A man inside an insulated metallic cage does not receive shock when the cage is highly charge. explain.

When a 3.50-g sample of liquid octane (c8h18) is burned in a bomb calorimeter, the temperature of the calorimeter rises by 27.3 ∘c. the heat capacity of the calorimeter, measured in a separate experiment, is 6.22 kj/∘c?

Air has pressure because a. the stratosphere is thick b. air has mass c. wind moves the air d. temperature warms the air

What types of exercises for stomach

Which states the law of conservation of energy? A. Energy cannot be created or destroyed, but it can be converted or changed into different forms. B. Energy can be created or destroyed, and it can be converted or changed into different forms. C.