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An object of mass 10.0 kg is released from the top of an inclined plane which makes an angle of inclination of 30.0? with the horizontal. The object slides along the inclined plane. The questions refer to the instant when the object has traveled through a distance of 2.00 m measured along the slope. The coefficient of kinetic friction between the mass and the surface is 0.200. Use g = 10.0 m/s2. How much work is done by gravity?
A circuit consists of a resistor in series with an inductor and an ac generator that supplies an rms voltage of 115 V. Find the average power dissipated in the circuit
Green light (? = 546 nm) strikes a single slit at normal incidence. What width slit will produce a central maximum that is 1.70 cm wide on a screen 1.18 m from the slit
An electron that has a horizontal initial speed of 4.50 x 10^6 m/s enters a region that has an electric field of 120 V/m pointing vertically upward. How long does the electron take to travel 9 cm in the horizontal direction
A 140 g air-track glider is attached to a spring. The glider is pushed in 12.00 cm and released. A student with a stopwatch finds that 9 oscillations take 10.0 s.
An elevator has mass 540 , not including passengers. The elevator is designed to ascend, at constant speed, a vertical distance of 19.5 (five floors) in 16.2 , What is the maximum number of passengers that can ride in the elevator
q1. an air puck of mass 0.026 kg is tied to a string and authorized to revolve in a circle of radius 1.5 m on a
A solid disk rotates in the horizontal plane at an angular velocity of 0.0693 rad/s with respect to an axis perpendicular to the disk at its center. what is the angular velocity of the disk
A 0.060kg ball is propelled by a 1.10kg racquet from rest to a speed of 40.0m/s. If the two objects are in contact for 250ms, calculate the average force exerted by the racquet on the ball
To warn his captain of the approaching army, a scout takes his bow and shoots a burning arrow straight vertically into the sky. What is the velocity of the arrow when it leaves the bow
A Helmholtz coil is used to generate a uniform magnetic field. Calculate the magnitude and the direction of magnetic field
The electric field everywhere on the surface of a thin, spherical shell of radius 0.785 m is of magnitude 850 N/C, What is the net charge within the sphere's surface
What is the minimum photon energy needed to create an electron - positron pair when a photon collides (a) with a free electron at rest and (b) with a free proton at rest?
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