[Talal-australia]

السلام عليكُم ورحمهـ ـآلله وبركآتهـ

إذا أحد يعرف يحل لي كم مسألهـ أو شي لآ يبخـل علينا .. وـآلله يوُفقكم





Length is to meter as
1. mass is to kilogram.
2. density is to volume.
3. liter is to distance.
4. weight is to mass.


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A gram is
1. 10−3 kg
2. 1 kg
3. 103 kg
4. 10−6 kg
5. 106 kg

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Which conversion factor would you use to
change 18 kilometers to meters?
1.
100 m
1 km
2.
1000 m
1 km
3.
1 km
1000 m
4.
1 km
100 m

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Convert 37.2 ◦ to radians. Answer in units of
rad.

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What is the standard form for 2 × 10−3?
1. 0.02
2. 0.0002
3. 20
4. 2
5. 200
6. 0.002
7. 0.2
8. 2000

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You push your little sister on a swing and in
1.9 minutes you make 55 pushes.
What is the frequency of your swing? An-
swer in units of Hz.

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Green light has a wavelength of 5.20 × 10−7
m and travels through the air at a speed of
3.00 × 108 m/s.
Calculate the frequency of green light waves
with this wavelength. Answer in units of Hz.

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Calculate the period of green light waves with
this wavelength. Answer in units of s.

-+--------

A state trooper’s car sends out a radar signal
at a frequency of 12.5 GHz.
Find the wavelength of this signal. The
speed of sound is 2.998 × 108 m/s. Answer in
units of m.

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The wavelength of light is usually measured
in angstroms (1 °A= 1.0 ×10−10 m). The
wavelength of light is 5990 °A and its speed
c  3 × 108 m/s. What is its frequency?
Answer in units of Hz.

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An ocean wave has a length of 13.1 m. A wave
passes a fixed location every 1.8 s. What is
the speed of the wave? Answer in units of
m/s.

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The motion of an object is described by the
equation
x = (0.8 m) cos t
1 
What is the position of the object at 0.6 s?
Answer in units of m.

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What is the amplitude of the motion? Answer
in units of m.-------------

What is the frequency of the motion? Answer
in units of Hz.------------------

What is the period of the motion? Answer in
units of s.---------------
Sound in air can best be described as which
of the following type of wave?
1. Transverse
2. Longitudinal
3. Electromagnetic
4. Polarized
5. Torsional

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As your hand moves back and forth to gener-
ate longitudinal pulses in a spiral spring, your
hand completes 2.27 back-and-forth cycles ev-
ery 4.62 s. The velocity of the pulse in the
spring is 0.954 cm/s.

------------

What is the wavelength? Answer in units
of m.

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Suppose a sound wave and an electromagnetic
wave have the same frequency.
Which has the longer wavelength?
1. They have the same wavelength.
2. the sound wave
3. the electromagnetic wave
4. It depends on the speed of the sound
wave.

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“Doing the wave” is a common activity in
large football stadiums.
What type of wave is this?
1. Cannot be determined from the informa-
tion.
2. Transverse wave.
3. Longitudinal wave.
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