When you catch a baseball is the energy gained or lost?

What element is the basis for all living things and can combine with other elements in many ways?

How can recycling impact the environment? Select one: a. It uses less energy to make something from recycled materials than from new materials. b. It increases the amount of landfill space needed. c.

A 20N force is directed to the right and a 14 Newton force is directed to the left and both act on a 3 kg mass. Starting from rest, how far does the object move in the first second

Dependent variable and the independent variable is?

If Star A and Star B have the same absolute magnitude, but Star A is brighter, what does that tell us?

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