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A lit firecracker is shot straight up at 50 m/s. How high is it above ground level 5 s later when it explodes? How fast is it moving when it blows up? How far has it fallen from its maximum height?
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When the starter motor on a car is engaged, there is a 330A current in the wires between the battery and the motor, What minimum diameter can the wires have if the voltage drop along the wires is to be less than 0.45V
Two positive charges of 7.40 micro-Coulombs are placed on a horizontal surface with a coefficient of static friction 0.72. If they are originally far apart.
If a projectile is launched vertically from the Earth with a speed equal to the escape speed, how far from the Earth's center is it when its speed is 1/6 of the escape speed
If 3.00multiplied by10-3kg of gold is deposited on the negative electrode of an electrolytic cell in a period of2.73h, what is the current in the cell during that period
q1. an elevator cable can withstand a maximum tension of 19500n before breaking. the elevator has a mass of 480 kg and
If the blocks move determine the magnitude of their acceleration. If the blocks move determine the magnitude of the tension in the string. If the blocks do not move evaluate the sum of the magnitude of the forces of friction acting on the blocks...
The work performed as a function of time for a process is given by W = at3 , where a = 2.4 J/s3. What is the instantaneous power output at t = 2.6 s
What approximations can you make about reactances when the series RCL circult is connected to a battery, Which reactance would be the most important
Consider a rotational axis at point where the tire contacts the ground, directed vertical to the plane of the paper. Find out the magnitude of the man's force for both designs.
A puck of mass m1 = 63g and radius r1 = 4.30 cm glides across an air table at a speed of = 1.50 m/s. It makes a glancing collision with a second puck of radius r2 = 6.00 cm and mass m2 = 115 g (initially at rest) such that their rims just touch.
Suppose a block with mass 2.30kg is resting on a ramp. If the coefficient of static friction between the block and the ramp is 0.420. Find the maximum static friction force that acts on the block.
A student sees a newspaper ad for an apartment that has 1430 square feet (ft2) of floor space. How many square meters of area are there
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