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A sled of mass 50.0 kg is pulled along flat, snow-covered ground.The static friction coefficient is 0.30, and the kinetic frictioncoefficient is 0.10.
a.) What does the sled weigh?
b.) What force will be needed to start the sled moving?
c.) What force is needed to keep the sled moving at a constantvelocity?
d.) Once moving, what total force must be applied to the sledto accelerate it at 3.0 m/s^2?
Two charged particles, q1 = ?2.50×10?3 C and q2 = +3.850e-3 C, are separated by a distance of 5.00 cm. What is the electric potential energy of this configuration
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A glass lens (nglass = 1.52) has a 136 nm thick anti-reflective film (nfilm = 1.33) on one side. What is the largest wavelength of the light that is totally removed by the film
During the design of a ski ramp, for safety it was decided that a skier should have a speed of no more than 30 m/s when reaching the bottom of the ramp. It is known that a typical 85 kg skier has a speed of 2 m/s upon leaving the starting gate at ..
Doppler ultrasound can be used to measure blood flow rate. What is the frequency of ultrasound reflected by moving red blood cells
a transverse wave on a string has an amplitude a. a tiny spot on the string is colored red. as one cycle of the wave
A sphere of radius R = 0.325 m and uniform charge density -151 nC/m3 lies at the center of a spherical, find the magnitude of the electric field at the following radial distances from the center of the charge distribution
A high energy photon is scattered at an angle of ? =180.0° from an electron that is initially at rest. Find the energy of the incident X-ray photon
A transformer consisting of two coils wrapped around an iron core is connected to a generator and a resistor, as shown in the drawing. There are 12 turns in the primary coil and 20 turns in the secondary coil. The peak voltage in the resistor is 54 V..
A precious-stone dealer wishes to find the specific heat capacityof a 0.040-kg gemstone. What is the specific heat capacity of the specimen
A tube is partially and vertically inserted into a container of water. What is the temperature of the surrounding air
In a movie, a person is supposed to jump with a motorcycle from the roof of one skyscraper to another one. what minimum initial speed would she need to make the jump
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