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A 4 kg wooden block is pulled on a horizontal surface with a force of 30 N that forms an angle of 25 ° on horizontal. The acceleration experienced by the block is 3.85 m / s2.
(a) Draw a free-body diagram.
(b) Calculate the kinetic friction coefficient.
A note of frequency 700 Hz. has an intensity of 5.0E-06 W/m^2. What is the amplitude (in meters) of the air vibrations caused by this sound
Why is the velocity larger for the bottom stream of water? On a quiet day, the atmospheric pressure results in a force of about 10,0000 N on a window pane with an area of 1 square meter. Why does this large force not shatter the window
Two astronauts on opposite ends of a space ship are comparing lunches. One has an apple, the other has an orange. What is the final speed and direction of the apple in this case
You are given a pendulum composed of a 0.038 kg mass on the end of a 0.6 m long massless string. compute the velocity of the mass as it passes through the vertical
In order to decrease the intensity of a beam of unpolarized light to 10% of its original intensity using two polarizers, find the angle between the transmission axes of the two polarizers
How fast is the mass moving at the top of its new path (directly above the peg)?
A standing wave has been created on a string of length 1.5m. The frequency of the wave is 25Hz. The ends of the string are nodal points and there are 3 antinodes. If the maximum amplitude of the wave is 5cm, write complete expressions, including v..
An electron with electric charge of 1.610-19 C falls through a potential difference of 56 kV in the vacuum of an X-ray tube. What is the kinetic energy of the electron, assuming it started from rest and that there is no loss of energy to friction?
Firefighters are on the scene of a working fire and using an 1 1/8" straight bore nozzle to penetrate the ceiling. As the straight steam hits the ceiling it breaks the drywall, in small pieces, accelerates n the direction of the stream. Which eq..
Two stars in a binary system orbit around their center of mass. The centers of the two stars are 7.90 1011 m apart. What is the mass of the smaller star
if a 1500kg car is driven in sand at 5m/s, the coefficient of rolling friction is 0.06. What is the propulsion force need tot keep the car moving
A parallel-plate capacitor with plates of area 580 cm2 and is connected across the terminals of a battery. What is the magnitude of the charge on each plate
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