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A rocket is fired vertically from the surface of the earth. Its engines fire only briefly, and then the rocket continues to coast upward. What must the rocket's initial speed be if its speed is to be not less than 5.0 km/s when it is very far from the earth?
Three resistors, 28, 48, and 80 ?, are connected in series, and a 0.53-A current passes through them. What is the potential difference across the three resistors
A skier of mass 70.0 kg is pulled up a slope by a motor-driven cable. A motor of what power is required to perform this task
Two cars collide at an intersection. Car , with a mass of 2000 , is going from west to east, while car , of mass 1300 , is going from north to south at 12.0. How fast was car going just before the collision
A person pulls a toboggan for a distance of 41.7 m along the snow with a rope directed 24.3 ° above the snow, How much work is done on the toboggan by the tension force
the illumination lights in an operating room use a concave mirror to focus an image of a bright lamp onto the surgical
The car and minivan collide and stick together. Suppose the direction of the wreckage after the impact is 42.0° above the x axis.
Consider 10 air molecules in an otherwise empty room. Find the probability that exactly four molecules are in the front third and exactly six in the top half, exactly three molecules are both in the front third and the top half (that is, the same mol..
An air conditioner connected to a 139 V rms ac line is equivalent to a 11 capital omega resistance and a 2 capital omega inductive reactance in series. What is the impedence of the air conditioner
A converging lens(f1=4 cm) is located 8 cm to the left of a diverging lens (f2= -2 cm). Find the final image formed by the 2 lens system
The vibration of an o2 molecule has a wavenumber of 1580.4 cm^-1 Calculate the energy (in joules) of the first excited state?
A 110 g copper bowl contains 130 g of water, both at 24.0°C. A very hot 370 g copper cylinder is dropped into the water, causing the water to boil, How much energy (in calories) is transferred to the water as heat
a roller coaster is initially at a height of 40 m above the ground and has an initial velocity of 15 ms. using
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