You hold one end of a solid rod in a fire, and the other end becomes hot. This is an example of

a. heat conduction
b. heat convection
c. heat radiation
d. thermal expansion
e. none of the above


A

Physics & Space Science

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Petra pushes a crate across a rough floor. A frictional force of 28.0 N acts to oppose the motion of the crate, and Petra pushes with a horizontal force of 36.4 N. If the net work Petra does is 94.5 J, through what distance did she push the crate?

a. 11.3 m b. 3.38 m c. 2.60 m d. 2 650 m e. 3 440 m

Physics & Space Science

As you go from a point where a gravitational field is strong to a point where the gravitational field gets weaker, the gravitational field lines get farther apart

Indicate whether the statement is true or false

Physics & Space Science

A capacitor with a capacitive reactance of 40.0 ? is connected in series with a 100-? resistor across an ac source of frequency 60.0 Hz. What is the phase angle?

A) +68.2° B) -68.2° C) -21.8° D) +21.8° E) 90.0°

Physics & Space Science

For differentiation to have occurred, the Earth's interior must have been ________

Fill in the blank(s) with correct word

Physics & Space Science