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a) Calculate the speed of sound in air at a temperature of 12.0 degrees C given that the speed of sound in air at a temperature of 0.0 degrees C is 331 m/s.
b) A lightning flash is seen in the sky and 8.2 s later the boomof the thunder is heard. The temperature of the air is 12.0 degreesC. How far away is the lightning strike? [Hint: Light is anelectromagnetic wave that travels at a speed of 3.00 x 10^8 m/s inair.]
q1. a box of mass 32 kg is at rest on a horizontal frictionless surface. a constant horizontal force then acts on the
A flower pot falls from the roof and passes in front of a window of height h as it falls to the ground to smash to pieces. If the flower pot takes a time T to pass from top to bottom in front of window. Find the (as-yet-unknown) height H from the ..
A mass at the end of a spring is at distance x = +2.18 cm from the equilibrium position moving with velocity v = - 20.2 cm/s. Find the amplitude of the motion in cm
Image intensifiers used in night-vision devices create a bright image from dim light by letting the light first fall on a photocathode. If light of wavelength 720nm strikes such a photocathode, what will be the maximum kinetic energy, in eV, of the..
a ball is launched with a velocity of magnitude 7.00 m/s, at an angle of 40.0° to the horizontal. find the angle of its displacement from the launch point
A pulse travels on a string 8.0 m long and 12 g mass. If the tension in the string is 32 N, how long does it take the pulse to travel the length of the string
What must be the thickness of the liquid layer if normally incident light with? = 504 nm in air is to be strongly reflected
A loudspeaker is generating sound in a room. At a certain point, the sound waves coming directly from the speaker (without reflecting from the walls) create an intensity level of 74.1 dB. The waves reflected from the walls create, by themselves, an i..
A long jumper leaves the ground at 45 above the horizontal and lands 8.2 away. What is her "takeoff" speed
The biggest asteroid (Asteroid 2005 YU55 400 m wide) to cruise by the Earth in 35 years made its closest approach on Tuesday November 11/08/2011 at 6:28 p.m. (PST). Find the acceleration and speed of the asteroid in its circular orbit
In a television set the power needed to operate the picture tube comes from the secondary of a transformer. Find the current in the primary
A 13.00 g bullet travelling 236 m/s penetrates a 2 kg block of wood and emerges cleanly at 179 m/s. If the block is stationary on a frictionless surface as hit, how fast does it move after the bullet emerges.
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