Through which one of the following mediums is the velocity of a sound wave the greatest?

A. Lead

B. Air

C. Water

D. Steel

Does using oxygen to separate molten copper sulphide into copper and sulphur dioxide count as a physical change

The springs of a 1000 kg car compress 5.5 mm when its 68 kg driver gets into the driver's seat. If the car goes over a bump, what will be the frequency of vibrations?

Suppose the sun shrank in size but its mass remained the same. what would happen to the orbit of earth?

The acceleration of an object depends on what two things? Question 3 options: The amount of matter in an object and it's size. The velocity of the object and force applied. The mass of the object and the distance away for the force it is.

A rigid layer that lies outside the cell's membrane is

What is the resistance of a clock if it has a current of 0.30 a and runs on a 9.0-v battery? 0.033 2.7 9.3 30

A child is sledding. He starts at the top of the hill with a velocity of zero, and 3 seconds later he is speeding down the hill at 12 meters per second. What is the child's acceleration?

An accelerating voltage

A speck of dust on a spinning dvd has a centripetal accelera - tion of 20 m/s2. a. what is the acceleration of a different speck of dust that is twice as far from the center of the disk? b.

An object travels 8 meters in the first second of travel, 8 meters again during the second second of travel, and 8 meters again during the third second. Its acceleration is A. 0 m/s^2 B. 8 m/s^2 C. 16 m/s^2 D. 32 m/s^2