_______1. When the movement of a vibrating
particle is perpendicular to the direction of the wave, it is termed _______
wave motion.
a.
Transverse b. longitudinal
_______2. A satellite in a circular orbit
around Earth has a constant speed but not a constant velocity. Which of the
following statements best explains why the satellite’s velocity is not
constant?
a.
The radius of the satellite’s orbit
is too large.
b.
The force on the satellite’s mass is
constantly decreasing.
c.
The magnitude of the satellite’s
momentum is too large.
d.
The direction of the satellite’s
motion is constantly changing.
_______3. When a wave travels through a
medium ______.
a.
|
particles are transferred from one place to another
|
b.
|
energy is transferred in a periodic manner
|
c.
|
energy is transferred at a constant speed
|
d.
|
none of the above statements is applicable
|
_______4. The minimum distance between the source and
the reflector, so that an echo is heard is approximately equal to ______.
a. 10 m c. 34 m
b. 17 m d. 50 m
_______5. Bats detect the obstacles in their path by
receiving the reflected ______.
a. infrasonic waves c. electromagnetic waves
b. radio waves d. ultrasonic waves
_______6. When sound travels through air, the air
particles ______.
a.
|
vibrate along the direction of wave propagation
|
b.
|
vibrate but not in any fixed direction
|
c.
|
vibrate perpendicular to the direction of wave propagation
|
d.
|
do not vibrate
|
_______7. Which of the following will remain unchanged
when a sound wave travels in air or in water?
a. Amplitude c. Frequency
b. Wavelength d.
Speed
_______8. A sound source sends waves of 400 Hz. It
produces waves of wavelength 2.5 m. The velocity of sound waves is
a. 100 m/s c. 10000 m/s
b. 1000 m/s d. 3000 km/s
_______9. The method of detecting the presence,
position and direction of motion of distant objects by reflecting a beam of
sound waves is known as _____.
a. RADAR c. MIR
b. SONAR d. CRO
_______10. The technique used by bats to find their way
or to locate food is _______.
a. SONAR c. Echolocation
b. RADAR d. Flapping
_______11. The
minimum audible wavelength at room temperature is about.
a.
0.2 A c. 5 cm to 2 metre
b.
5 A d. 20 mm
_______12. Which of the following quantities is transferred
during wave propagation?
a. speed c. mass
b. matter d. energy
_______13. Unit of wavelength is __________.
a. Newton c. dyne
b. Erg d. angstrom
_______14. The vibrations or the pressure variations
inside the inner ear are converted into electrical signals by the_________.
a. Cochlea c. pinna
b. tympanic membrane d. anvil
_______15.
If sound travels at 340 m/s why does it take 2
seconds to hear the echo off a wall 680 m away?
a.
It
takes 2 seconds because echoes travel twice as fast as sound
b. Echoes travel at 1/2 the speed
of sound
c. It takes sound 1 second to get
there and 1 second to get back
d. It only takes 1 second to hear
the echo
_______16. How
is the Doppler Effect used to measure the velocity of a sound source (e.g.
police car with the siren on)?
a. The Doppler Effect can only be
used to measure position not velocity
b. The frequency of the received
sound from the source changes as the distance to the source changes
c. The frequency of the received
sound from the source changes as the velocity of the source changes
d. The time it takes the sound to
reflect off the object is used to calculate the velocity of the source
_______17. Why doesn't sound travel through a vacuum?
a. Vacuums are too cold to allow
sound waves to travel through them
b. Sound is a waveform operating
in matter, and there is no matter in a vacuum
c. Vacuums absorb most of the
sound
d. Explosions in space can be
heard therefore sound does travel in space
_______18. A car rounds a curve while
maintaining a constant speed.
a.
The question could as well have been stated, “A car rounds a curve while
maintaining a constant velocity.”
b.
With constant speed, the net force on the car is zero.
c.
With constant speed, there is still be a net force that is directed outward
(relative to the curve) on the car.
d.
With constant speed, there is still be a net force that is directed inward
(relative to the curve) on the car.
_______19. A mass attached to a string that is itself
attached to the ceiling swings back and forth.
a.)
At the bottom of the arc, it has no
net force acting on it
b.)
At the bottom of the arc, it has no
net force acting in the vertical.
c.)
At the bottom of the arc, tension
and gravity balance one another out.
d.)
At the bottom of the arc, there is
no centrifugal force.
_______20. Which of the following statements is NOT true
about centripetal forces:
a.)They
are always oriented along the line between the body and the center of the arc
upon which the body moves.
b.)They
are always perpendicular to the velocity vector.
c.)They
are always perpendicular to the acceleration component that motivates the body
to change its speed.
d.)They
are one of the six naturally occurring forces used in conjunction with free
body diagrams.
_______21. A car going around a curve is found to be
able to take the curve with maximum speed “v.” You would like to double the
maximum speed the car can take the curve. To do this, you could:
a.)
double the coefficient of friction between the car and the road;
b.)
quadruple the coefficient of friction between the car and the road;
c.)
halve the radius of the road;
d.)
double the radius of the road.
_______22. When an object is moving with uniform
circular motion, the centripetal acceleration of the object
a.
is circular.
b.
is perpendicular to the plane of motion.
c.
is zero.
d.
is directed toward the center of motion.
_______23. What term describes a change in the speed of an
object in circular motion?
a.
tangential speed c.
centripetal acceleration
b.
tangential acceleration d.
centripetal force
_______24. An airplane makes a circular turn in
its approach to the runway for landing. The air applies a centripetal force on
the wings of the plane that allows it to turn. If the mass of the plane were
doubled, the centripetal force required to turn the plane would be:
a.
the same.
b.
half as much.
c.
twice as much.
d.
four times as much
_______25. Which of the following statements actually
describes a characteristic of the force that acts on an object and causes it to
move in a circle?
a.
It balances all other forces.
b.
It is directed toward the center of the circle.
c.
It is in the same direction as the object's velocity.
d.
It is directed away from the center of the circle.
_______26. Which of the following statements is always
true when describing a collision between any two objects on a frictionless
horizontal surface?
a.
The momentum of each object before and after the collision is the same.
b.
The kinetic energy of each object before and after the collision is the same.
c.
The total momentum of the two objects before and after the collision is the
same.
d.
The total energy is more after the collision than it was before
_______27. In the two-dimensional collision experiment
that was performed in class (where an incident ball was launched from the
projectile launcher and experienced a glancing collision with a stationary
target ball in front of the launcher), pretend that we used a steel incident
ball and a glass target ball, which is half the mass of the steel ball. Which
of the following statements best describes how the displacement vectors of the
two balls could be drawn to represent momentum vectors?
a.
They may be used as they are.
b.
The displacement of the glass ball must be cut in half.
c.
The displacement of the glass ball must be doubled.
d.
The displacement of the steel ball must be cut in half
_______28. A physics student observes glancing
two-dimensional collisions between identical billiard balls. Which of the
following observations confirms that the collision between a moving (incident)
ball and a stationary (target) ball is elastic?
a.
The incident ball bounces back.
b.
The target ball has a much higher velocity after impact.
c.
The two balls have identical speeds after impact.
d.
The two balls travel along paths separated by 90o angle after impact
_______29. Kepler's
first law of planetary motion says that the planets follow
a.
circular paths around the sun c.
hyperbolic paths around the sun
b.
elliptical paths around the sun d.
parabolic paths around the sun
_______30. As a car travels around a horizontal circular
track at a constant speed, it must undergo a change in which of the following quantities?
a. mass c.
velocity
b.
speed d.
weight
_______31. The force of gravitational attraction between
two objects is 20. newtons. If the mass of each object were doubled, the
gravitational force between the objects would be:
a.
5.0 newtons.
b.
10. newtons.
c.
20. newtons.
d.
80. Newtons
_______32. If the distance between two objects were
doubled, the force of gravitational attraction between the objects would be:
a.
the same.
b.
double the original force.
c.
one half of the original force.
d.
one quarter of the original force
_______32. The mass of an object at the surface of the
Earth compared to the mass of the same object at a distance of two Earth radii
from the surface of the Earth is:
a.
the same.
b.
one half.
c.
one quarter.
d.
one ninth.
_______33. The
centripetal force that causes a car to go round a bend in the road is provided
by
a) The force produced by the car engine acting on the wheels
b)the friction between the tires and the road
c)the weight of the car
d)the force exerted by the driver on the steering wheel
a) The force produced by the car engine acting on the wheels
b)the friction between the tires and the road
c)the weight of the car
d)the force exerted by the driver on the steering wheel
Nice work po! Passionately done!
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