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A bullet is fired horizontally from a gun. At the exact instant the trigger is pulled, a ball is released from the exact same height as the gun and allowed to fall to the ground. Which projectile hits the ground first, or do they hit at the same time?
A student could either pull or push, at an angle of 30? from the horizontal, a 55kg crate on a horizontal surface, Calculate the minimum work required for both pulling and pushing
A charging bull elephant with a mass of 5240kg comes directly towards you with a speed of 4.55m/s.You toss a 0.150-kg rubber ball at the elephant with a speed of 7.81m/s. (a) when the ball bounces back toward you,what is its speed?
A proton is at the origin and an electron is at the point x=0.63nm, y=-0.45nm. Find the magnitude of electric force on the proton
Two 10 cm-diameter charged thin rings face each other, 20 cm apart. The left ring is charged to 20 nC and the right ring is charged to +20 nC. What is the electric field.
A jetliner can fly 5.80 hours on a full load of fuel. Without any wind it flies at a speed of 2.35 x 102 m/s. Find the maximum distance that the plane can travel due west and just be able to return home
A 18.2-? resistor is made from a coil of copper wire whose total mass is 18.5g. What is the diameter of the wire
a binary star system has a period of 7.7e6 7700000 s. it is noted that one star is moving twice as fast as the other
A spaceship moves radially away from Earth with acceleration32 m/s2. How long does it takefor the sodium streetlamps (λ congruent 589 nm) on Earth to be invisible (with a powerfultelescope) to the human eye of the astronauts? The range of visiblewave..
A hedgehog pushes a rock of 1.9 kg up a ramp, which is tilted at 19.5 degrees to horizontal, How much work is done by friction
A 40-pF capacitor is immersed in silicone oil, which has a dielectric constant is 2.6. Estimate how much energy is stored in the capacitor
You are so tired after studying that you leave all of these household devices turned on for 13.0 hours, Calculate the cost (in dollars) of the electric bill
The speed of the tip of the minute hand on a town clock is 0.00125 m/s. find the centripetal acceleration of the tip of the second hand
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