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Q1. A cannonball shot with the initial velocity of 129 m/s at an angle of 36° follows a parabolic path and hits a balloon at the top of its trajectory. Neglect air resistance, how fast is the cannonball going as it hits the balloon?
Q2. A diver springs upward with an initial speed of 2.0 m/s from a 4.0 m board.
(a) Find out the velocity with that he strikes the water. (Hint: When the diver reaches water, his displacement is y = -4.0 m (measured from the board), assume that the downward direction is selected as the negative direction.)
(b) What is the highest point he reaches above the water?
A person hums into the top of a well and finds that standing waves are established at frequencies of 10, 30, and 50 Hz. How deep is the well
A copper block is removed from a 310 degrees Celsius oven and dropped into 1.20kg of water at 20.5 degrees Celsius. The water quickly reaches 25.5 degrees Celsius and then remains at that temperature.
A bullet is fired through a board 8.0 cm thick in such a way that the bullet's line of motion is perpendicular to the face of the board. Find the total time the bullet is in contact with the board
q1. a 78.9 kg man steps off a platform 4.57 m above the ground. he keeps his legs straight as he falls but at the
A slab of glass with an index of refraction of 1.55 is submerged in a liquid with an index of refraction of 1.25. Find the angle of refraction for the angle of incidence of 60°
A capacitor is charged to a potential of 12.0 V and is then connected to a voltmeter having an internal resistance of 3.50M%u03A9. What is the time constant of the circuit
Suppose an object starts from rest and the falls with a constant acceleration of 5 mph/s. What will be the speed of the object
An ideal refrigerator does 130 J of work to remove 655 J of heat from its cold compartment during each cycle. How much heat per cycle is exhausted to the kitchen
Spaceship A moves away from earth at a velocity of uxA= -0.50 c and spaceship B at uxA= 0.70c, uyB= -0.20c uzB=0.30c. How fast is B's velocity in A's reference frame
An x-ray photon of 0.13 nm strikes a metal and undergoes Compton scattering of the electrons in the metal. find the wavelength of the scattered photon
Electric eels generate electric pulses along their skin that can be used to stun an enemy when they come into contact with it. What power is delivered to the unfortunate enemy
Point A is at position (4j -3k)cm. Point B is at position -3cm k. Point C is at position (3i -2j + 5k) cm. Point D is at position 4cm j. Charges of -4 and +5uC are at A and B respectively. What is the electric potential energy of an electron at D
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