When an effervescent tablet is dropped in water, what indicates that a chemical change is occurring?

a. the evolution of a gas

b. the condensation of a gas

c. the melting of a solid

d. the subliming of a solid

If a cheetah can maintain a constant speed of 25 m/s, it will cover 25 meters every second. At this rate, how far will it travel in 10 seconds? In 1 minute?

Does temperature increase or decrease with altitude in the thermosphere

Consider a uniform solid sphere of radius R and mass M rolling without slipping. The moment of inertia of the sphere about an axis through its center is 25MR2. Which form of its kinetic energy is larger, translational or rotational? Consider

The angular momentum about the center of the planet and the total mechanical energy will be conserved regardless of whether the object moves from small R to large R (like a rocket being launched) or from large R to small R (like a comet approaching

Heat would be transferred by conduction between A. A candle and the air B. An oven and a glass dish C. A stove and a copper pot D. Water and a wooden spoon

2. Weight is a force from gravity pulling down on any object with mass. True False

A 0.9 kg football is thrown with a velocity of 22.0 m/s to the right. A stationary receiver catches the ball and brings it to rest in 0.06 seconds. What is the force exerted on the receiver?

water waves carry particles of water in the same direction that the wave is traveling. True or False?

Two objects of different masses are sitting on different balance scales. Object A has a greater mass than object B. How will the weights of the objects compare to each other?

Does an object that feels cold to the touch contain thermal energy Explain your answer