Semester 2 Practice

You touch a metal doorknob on a hot day and burn your hand. Which method of heat transfer is this caused by?

• conduction

• radiation

• convection

• insulation

The number of complete swings a pendulum makes a second is known as the:

• wavelength

• period

• frequency

• speed

Which type of wave is longitundal?

• light

• ocean

• standing wave on a string

• sound

Which of the following is the thresold of pain in hearing?

• 0 db

• 90 db

• 120 dm

• 230 dm

An insulating balloon is rubbed on a conduting surface. What is the resulting charge of the balloon?

• positive

• negative

• neutral

• all of these

Sound will travel the fastest through which of the following?

• air

• water

• carbon dioxide gas

• steel

A high density area in a sound wave is called a

• rarefaction

• compression

• crest

• trough

In the diagram to the right, the jet is emitting a frequency of 500 Hz.  Where could you be standing if you hear a frequency lower than 500 Hz?

• In the jet

• Behind the jet

• In front of the jet

• At all points, frequency does not change

A spring is pulled by a force. Which of the following increases as the spring is stretched further? 

• the mass of the spring

• the spring constant

• the spring force

• the period of the spring

Increasing which of the following will DECREASE the resistance of a resistor?

• Temperature

• Length

• Cross-section area

• Weight