Convection only occurs in what? a. gases b. fluids c. liquids d. solids

How do you measure mass

What are the dimensions of a high school textbook?

If the pitch of the sound coming out from a speaker increases, which is true about the sound wave?

You are on a train traveling east at speed of 19 m/s with respect to the ground. 1) If you walk east toward the front of the train, with a speed of 1.5 m/s with respect to the train, what is your velocity with respect to the ground

An electric car is being designed to have an average power output of 4,600 W for 2 h before needing to be recharged. (Assume there is no wasted energy.) How much energy would be stored in the charged batteries? = J The batteries operate on 80 V.

Suppose that the centripetal force acting on an object in circular motion were doubled to a new value, and the object remained in a circular path with the same radius. How would the motion be affected?

2. Air at a temperature of 20 ºC passes through a pipe with a constant velocity of 40 m/s. The pipe goes through a heat exchanger in which hot gases outside the pipe heat up the air to 820 ºC.

What is the thermometer

In which natural cycle must an important gas in Earth's atmosphere be fixed before plants can use it? a. sulfur cycle b. carbon cycle c. nitrogen cycle d. oxygen cycle

Convection only occurs in what? a. gases b. fluids c. liquids d. solids