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Q1. A submarine is 306 m horizontally out from a shore and 120 m beneath the surface of the water. A laser beam is sent from the sub so that it strikes the surface of the water at a point 245 m from the shore. If the beam now strikes the top of a building standing directly at the water's edge, find out the height of the building.
Q2. A 220 g block hangs from a spring with spring constant 9.0 N/m. At t=0s, the block is 28 cm below equilibrium point and moving upward with a speed of 110 cm/s. What is the block's position if the frequency is 1Hz at 2s?
A circular wire loop of radius 13cm carries a current of 3.66 A. It is placed so that the normal to its plane makes an angle of 34.8° with the uniform magnetic field of magnitude 9.70 T.
For a damped oscillator with a mass of 350 g, a spring constant 59.00 N/m and a damping coefficient of 89 g/s, what is the ratio of the amplitude of the damped oscillations to the initial amplitude at the end of 30 cycles.
A diverging lens (f = -12 cm) is located 20 cm to the left of a converging lens (f = 35.0 cm). A 3.00 cm tall object stands to the left of the diverging lens, exactly at its focal point.
An alpha particle and beta^ {-} particle, each with kinetic energy 35 {rm keV}, are sent through a 1.10 {rm T} magnetic field. The particles move perpendicular to the field. Find the curvature radius for alpha particle's trajectory. Hint: The kine..
a tennis ball is fired from a gun that us mounted on the floor. the tennis ball has an initial speed Vo= 25.0m/s, what is the speed of the tennis ball when it reaches your racket
A child pulls an imaginary friend in a wagon at constant speed for 10m with a force of 16N. how much work does the child do
A fighter jet is attempting to land on an aircraft carrier with a runway length of 320m. How far will the jet have to travel before it stops
An object of mass 2 kg and charge 40 microC is moving with initial speed of 5 m/s towards a fixed point charge of 30 microC which is fixed. Find the position of the object when it comes to rest
A pitcher throws a 0.140-kg baseball, and it approaches the bat at a speed of 50m/s. The bat does Wnc = 70J of work on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 25.0 m abo..
why is it advisable to make use of a proper restraining seat rather than hold a child on your lap.
A large sponge has forces of magnitude 12 N applied in oppositedirections to two opposite faces of area 42 cm^2. What is theshear modulus of the sponge
In 1851 Jean Bernard Leon Foucault demonstrated the rotation of the Earth using a pendulum 11.0 m long, What was the period of oscillation of the pendulum
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