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A cannon fires a cannon ball at 999.16 m/s in a straight line that passes directly over an observer's head. If the observer hears the sound of the cannon fire 2.47 seconds after he sees the cannon ball pass over his head, how far is the cannon from the observer? The temperature on this day is 14.99 C.
What is the minimum thickness of coating which should be placed on a lens in order to minimize reflection of 406 nm light? The index of refraction of the coating material is 1.54 and the index of the glass is 1.79.
A light ray travels through medium #1 and crosses a boundary into water at an indicent angle of 21.8 degrees. what is the energy of one photon of this light
Pool players often pride themselves on their ability to impart a large speed on a pool ball. At what speed did his pool ball hit the ground
A box of mass 5.8 kg is accelerated from rest by the force across a floor at a rate of 2.0 m/s2 for 8.2 s. Find the net work done on the box.
In a photoelectric effect experiment, visible radiation of energy 2.91 eV is incident upon a metal of work function 1.66 eV. find the maximum kinetic energy of the ejected photoelectrons
A train moving at a constant speed of 66.0 km/h moves east for 43.0 min, then in a direction 56.0° east of due north for 16.0 min, find the average velocity of the train during this run
Suppose a 7.1 eV electron and a 9.77 eV positron collide, Find the frequency of these new photons
A 2.93-kg model rocket is launched vertically upward with sufficient initial speed to reach a height of 3.71·102 m, even though air resistance (a nonconservative force) performs -6.11·102 J of work on the rocket.
A small block of mass 0.97 kg slides without friction on a horizontal table. Initially it moves in a circle of radius R0 = 0.52 m with a speed 1.3 m/s. What is the final speed of the block
It is claimed that if a lead bullet goes fast enough, it can melt completely when it comes to a halt suddenly, and all its kinetic energy is converted into heat via friction. Find the minimum speed of a lead bullet (initial temperature = 39.0° C) for..
An ideal gas's initial conditions are 1 mol, a pressure of 271.7 kPa, an internal energy of 624 J and a volume of 0.8 L. The gas is allowed to expand quasi-statically at constant pressure to a volume of 6.9 L. It is then cooled at constant volume unt..
Suppose the coefficient of static friction between the road and the tires on a car is 0.60 and the car has no negative lift. What speed will put the car on the verge of sliding
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