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A 20 kg. projectile is fired at an angle of 60 degrees abovehorizontal with a speed of 80 m/s. At the highest point of thetrajectory the projectile explodes into two fragments with equalmass, one of which falls with zero intitial speed, ignore airresistance.
a) how far from the point of firing does the other fragmentstrike if the terrain is level?
b) how much energy is released during explosion?
A crate is sliding down a ramp that is inclined at an angle of 33.3° above the horizontal. Find the acceleration of the moving crate
An implanted pacemaker supplies the heart with 72 pulses per minute, each pulse providing 3.0 V for 0.95 ms, Find the current that flows during a pulse
A person who weighs 656 N is riding a 91-N mountain bike. compute the area of contact between each tire and the ground
Suppose we hang a heavy ball with a mass m = 17 kg (so the weight is mg) from a steel wire 2.5 m long that is 2 mm in diameter (radius = 1e-3 m). Calculate the stretch L of the steel wire
It is possible to make a thermometer by sealing gas in a rigid container and measuring the absolute pressure. What is the temperature of this sample
two charged particles, Q1=+4.60 nC and Q2=-2.50 nC, are separated by 32.0 cm. What is the eletrical potential energy of the pair
Only two forces act on an object (mass = 2.70 kg), as in the drawing. (F = 63.0 N.) Find the magnitude and direction (relative to the x axis) of the acceleration of the object.
Eris, the largest known dwarf planet in the Solar System, has a radius R = 1200 km and an acceleration due to gravity on its surface of magnitude g = 0.77 m/s2. Use these numbers to calculate the escape speed from the surface of Eris
2.00 mol of a monaromic gas at atmospheric pressure has a total internal energy of 7.48x10^3J. What is the volume occupied a rigid cylinder by the gas
The planet Earth travels in a circular orbit at constant speed around the Sun. What is the net work done on the Earth by the gravitational attraction between it and the Sun in one complete orbit? Assume that the mass of the Earth is given by , the ma..
Suppose the emf of a coil rotating in a magnetic field is zero at t = 0 , and increases to its first peak at t = 0.08 ms. What is the period of the output
A copper ball with a radius of 1.6cm is heated until its diameter has increased by 0.17mm. find the final temperature of the ball.
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