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An archer aims an arrow precisely horizontal over a flat field and shoots it. At the same instant, the archer's watchband breaks and the watch falls to the ground. Does the watch hit the ground before, at the same time as, or after the arrow hits the ground?
A bat flies toward a wall, emitting a constant sound of frequency 2.00 rm kHz. This bat hears its own sound plus the sound reflected by the wall.
suppose that two objects attract each other with a gravitational force of 16 units. what would be the new force of attraction between the two objects
A woman can read the large print in a newspaper only when it is at a distance of 66 cm or more from her eyes. What should be the refractive power (in diopters) of her glasses
A solid cylinder (with a radius of 25cm and a mass of 4.4kg) is rotating counterclockwise with an angular speed of 0.5 revolutions per second just above a flat surface. What is the angular velocity of the cyclinder after .35 seconds slipping
An astronaut weighs 85 N on the Moon, where the acceleration of gravity is 1.62 m/s2. How much (in N) does she weigh on Earth
You are holding a 5 kg dumbbell straight out at arm's length. Assuming your arm is 0.62 m long, what torque is the dumbbell exerting on your shoulder
What is the maximum speed with which a 1060kg car can round a turn of radius 75m on a flat road if the coefficient of static friction between tires and road is 0.80.
Suppose 60kW is to be transmitted over two 0.150? lines, Estimate how much power is saved if the voltage is stepped up from 200V to 2000V
The average output power of a cellular phone, which can be treated as a point of E-M waves, is 1.0W when it is "ON". Estimate the intensity of the phone's E-M waves in your brain
A proton is released from rest in a uniform electric field of magnitude 1.08x10^5N/C. Find the speed of the proton after it has traveled 1.00cm
You create a plot of T2 (in s2) vs. L (in m) and the linear fit of your graph gives a slope of 3.7084 ± 0.0062. What is the value of the local gravitational constant, g
The mass of the Moon is 7.18X10^22 kg and radius is 1738 km. If your mass is 90 kg, what would be your weight (gravitational force of attraction) on the Moon
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