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A 50kg box is placed on an inclined plane making an angle of 30 degrees with the horizontal, If the coefficient of kinetic friction is 0.30, what is the resultant force on the box?
The electric field strength is 2.40 x 10^4 N/C inside a parallel-plate capacitor with a 1.40 mm spacing, What is the electron's speed when it reaches the positive plate
Tarzan swings on a 27.0 m long vine initially inclined at an angle of 33.0° with the vertical. What is his speed at the bottom of the swing if he starts from rest
A physical pendulum is composed of a 1.4 m rod with mass mr = 0.5 kg and a solid sphere with mass ms = 2.0 kg, What is the angular frequency of the oscillation
Unpolarized light of intensity 1.1 W/m^2 is incident on a polarizer. what is the intensity of the light that leaves the analyzer
A small telescope has a concave mirror with a 4.00-m radius of curvature for its objective. Its eyepiece is a 4.25-cm focal length lens. What is the angle of its telescopic image?
A ceiling fan with 84cm diameter blades is turning at 61rpm. Assume the fan coasts to a stop 25 after being turned off. What is the speed of tip of a blade 10 s after the fan is turned off.
A planet with a mass of 4.47E21 kg is in a circular orbit around a star with a mass of 4.83·1030 kg. The planet has an orbital radius of 1.31E10 m. What is the linear orbital velocity of the planet
A charging cell phone battery requires a current of 1.60 A and power is dissipated in the battery at 7.52 W. Determine the current drawn from the wall by the charger
A 70.0 cm thick layer of oil floats on a 120 cm thick layer of water. What is the pressure at the bottom of the water
A uniform meter stick is in static rotational equilibrium when a mass of 220 g is suspended from the 5.0-cm mark, What is the mass of the meter stick
A projectile proton with a speed of 500 m/s collides elastically with a target proton initially at rest. What is the speed of the target proton after the collision
A mortar crew is positioned near the top of a steep hill. Enemy forces are charging up the hill and it is necessary for the crew to spring into action. How long will the mortar shell remain in the air
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