Physics Waves And Oscillations Level: Misc Level
A source of sound waves of frequency 1 kHz is traveling through the air at 0.50 times the speed of sound.A.) Find the frequency of the sound received by a stationary observer if the source moves toward her.B.)Repeat if the source moves away from her instead.
Physics Waves And Oscillations Level: Misc Level
At a factory, a noon whistle is sounding with a frequency of 500 Hz. As a car traveling at 85 km/h approaches the factory, the driver hears the whistle at frequency f initial. After driving past the factory, the driver hears frequency final. What is the change in frequency f final-f initial heard by the driver?
Physics Waves And Oscillations Level: Misc Level
A.) What is the pressure amplitude of a sound wave with an intensity level of 120 dB in air?B.) What force does this exert on an eardrum of area 0.550x10^-4 m^2?
Physics Waves And Oscillations Level: Misc Level
A sound wave with an intensity level of 80 dB is incident on an eardrum of area 0.600 x 10^-4 m^2. How much energy is absorbed by the eardum in 3 minutes?
Physics Waves And Oscillations Level: Misc Level
A lightning flash is seen in sky and 8.2 s later the boom of the thunder is heard.The temperature of the air is 12 degree Celsius.A) What is the speed of sound at that temperature? (Light is an electromagnetic wave that travels at a speed of 3x10^8 m/s.) B.)How far away is the lightning strike?
Physics Waves And Oscillations Level: Misc Level
Dolphins emit ultrasonic waves with a frequency as high as 2.5x 10^5 Hz.What is the wavelength of such a wave in seawater at 25 degree Celsius?
Physics Kinematics Level: Misc Level
A projectile is fired horizontally with an initial speed of 50.0 m/s. Neglecting air resistance, what is the magnitude of the displacement of the projectile 3.00 s after it is fired?
a.29.4 m
b.44.1 m
c.150
d.156 m
e.98.6 m
Physics Kinematics Level: Misc Level
An arrow is shot horizontally from a height of 4.9 m above the ground. The initial speed of the arrow is 45 m/s.Neglecting friction, how long will it take arrow to hit the ground?
a.9.2 s
b.6.0 s
c.1.0 s
d.1.4 s
e.4.6 s
Physics Kinematics Level: Misc Level
A cannonball is aimed 30.0% above the horizontal and is fired with an initial speed of 125 m/s at ground level.How far away from the cannon will the cannonball hit the ground?
a.125 m
b.138 m
c.695 m
d.1040 m
e.1380 m
Physics Kinematics Level: Misc Level
An eagle is flying due east at 8.9 m/s carrying a gopher in its talons. The gopher manages to break free at a height of 12 m. What is the magnitude of the gopher,s velocity as it reaches the ground?
a.22 m/s
b.18 m/s
c.11 m/s
d.9.8 m/s
e.8.9 m/s
Physics Kinematics Level: Misc Level
A delivery truck leaves a warehouse and travels 2.60 km north. The truck makes a right turn and travels 1.33 km east before making another turn and traveling 1.45 km south to arrive at its destination. what is the magnitude and direction of the truck,s displacement from the warehouse?
a. 1.76 km,40.8% north of east?
b.1.15 km, 59.8% north of east
c.1.33 km,30.2% north of east
d.2.40 km,45.0% north of east
e.5.37 km, 49.2% north of east
Physics Kinematics Level: Misc Level
A tennis ball is shot vertically upward from the surface of an atmosphere-free planet with an initial speed of 20.0 m/s. One second later,the ball has an instantaneous velocity in the upward direction of 15.0 m/s. what is the magnitude of the acceleration due to gravity on the surface of this planet?
a. 5.0 m/s2
b.9.8 m/s2
c.12 m/s2
d.15 m/s2
e.24 .m/s2
Physics Kinematics Level: Misc Level
Starting from rest,a particle which is confined to move along a straight line is accelerated at a rate of 5.0 m/s2.Which statement concerning the slope of the position versus time graph for this particle is true?
a.The slope has a constant value of 5.0 m/s.
b.The slope has a constant value of 5.0 m/s2.
c.The slope is both constant and negative.
d.The slope is not constant and increases with increasing time.
e.The slope is not constant and decreases with increasing time.
Physics Kinematics Level: Misc Level
Ball A is dropped from rest from a window. At the same instant, ball B is thrown downward; and ball C is thrown upward from the same window. Which statement concerning the balls is necessarily true if air resistance is neglected?
a.At some instant after it is thrown, the acceleration of ball C is zero.
b.All three balls strike the ground at the same time.
c.All three balls have the same velocity at any instant.
d.All three balls have the same acceleration at any instant.
e.All three balls reach the ground with the same velocity.
Physics Kinematics Level: Misc Level
Which one of the following situations is not possible?
a.A body has zero velocity and non-zero acceleration.
b.A body travels with a northward velocity and a northward acceleration.
c.A body travels with a northward velocity and a southward acceleration.
d.A body travels with a constant velocity and a time-varying acceleration.
e.A body travels with a constant acceleration and a time-varying velocity.
