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A motorcycle traveling with a constant acceleration of 2.0 m/s sq crosses a 100 m long bridge in 4.23 sec. What was the velocity at the begining of the bridge? What was the velocity at the end of the bridge?
A 5C charge moves with velocity v = 10i + 3 j - 7 k m/sec in magnetic field B = 5i+ 13j - 1k tesla. find directions of magnetic force on the moving charge
A plastic bucket with negligible mass and specific heat holds 2 kg of water at temperature 20c. Find the entropy change of the ice as it cools and freezes into ice
A straight conductor carrying a current of 19 A splits into identical semicircular arcs of radius 13.3 m. The positive direction is out of the screen. What is the magnetic field at the center of the resulting circular configuration?
A 800kg , light-weight helicopter ascends from the ground with an acceleration of 3.50m/s2. What is the work done by the net force on the helicopter?
an object with a mass 2.70kg is executing simple harmonic motion, attached to a spring with spring constant k=280 N/m. What is the frequency of oscillation of the object
A rock of mass 42 kg accidentally breaks loose from the edge of a cliff and falls straight down. What is the magnitude of the acceleration of the rock
A 25-g rifle bullet travelling 280-m/s buries itself in a 3.6-kg pendulum hanging on a 2.8m long string, which makes the pendulum swing upward in an arc. Find out the vertical and horizontal components of pendulum's displacement.
The internal energy of a gas is 1000 J. The gas is compressed adiabatically, and its volume decreases by 500 cm3. what is the internal energy of the gas
at a concert you sit 12 m directly in front of one of the two speakers on the front of the stage. the other speaker is
An uncharged capacitor is connected to the terminals of a 4 battery, and 12 flows to the positive plate. The 4 battery is then disconnected and replaced with a 7 battery, with the positive and negative terminals connected in the same manner as bef..
The electric field has been measured to be vertically upward everywhere on the surface of a box 20 cm long, 4 cm high, and 3 cm deep, What is the amount of charge enclosed by the box
Light from a heliom-neon laser (wavelength 632.8 nm) diffracts when incident on a hair of thickness 0.040 mm. What is the angular width of the central diffraction maximum
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