Check my test
question 1

high pitched sounds have which type of frequency?

high (i think this one)

low

medium

none

question 2

sound waves that bounce off of a surface are

the frequency

the pitch

an echo (i think this one)

the wavelength

question 3

what does the amplitude of a sound wave measure?

pitch

echo

frequency

volume (i think this one)

question 4

which two aspects of sound go together?

pitch and frequency (i think this one)

pitch and decibals

pitch and volume

pitch and amplitude

question 5

what role does energy play in sound?

sound waves are not related to energy.

energy is carried by sound waves. (i think this one)

there is only energy in very loud sounds.

there is energy in high-pitched sounds, but not low-pitched sounds.

a high pressure system is a dense air mass that is usually cooler and drier than the surrounding air. a low pressure system is a less dense air mass that is usually wetter and warmer than the surrounding air.

in general, areas that experience high atmospheric pressure also experience fair weather. low pressure systems can cause the formation of clouds and storms. air usually flows from areas of high pressure to areas of low pressure..

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

the entire statement is true and correct.  

there's no diagram, nothing is illustrated, and no question is asked.