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A fellow astronaut passes by you in a spacecraft traveling at a high speed. The astronaut tells you that his craft is 20.0 m long and that the identical craft you are sitting in is 19.0 m long. According to your observations, (a) how long is your craft, (b) how long is the astronaut's craft, and (c) what is the speed of the astronaut's craft relative to your craft?
What is the force exerted by the scale if the elevator is accelerating downward with an acceleration of 2.6 m/s2. If the elevator's descending speed is measured at 10 m/s at a given point, but its speed is decreasing by 2.6 m/s2, illustrate what is ..
Ground beef may be irradiated with high-energy electrons from a linear accelerator to kill pathogens. How much energy is deposited in the beef
A rectangular plate has a length of (20.4 0.2) cm and a width of (8.7 0.1) cm. Calculate the area of the plate
A stone used to grind wheat into flour is turned through 12 revolutions by a constant force of 21.6 N applied to the rim of a 9.2-cm-radius shaft connected to the wheel
questiona 1.00 ball is thrown directly upward with an initial speed of 16.0. a graph of the balls gravitational
An electric vehicle starts from rest and accelerates at a rate of 1.7 m/s2 in a straight line until it reaches a speed of 27 m/s. The vehicle then slows at a constant rate of 1.0 m/s2 until it stops. (a) How much time elapses from start to stop? (..
A laser pointer has a beam intensity of 36 W/m2 and a beam radius of 2.4 mm. A first grader attempts to use it to move a black toy car. what is the force on the car
Pitcher throws 0.15kg baseball. What is the approximate speed of the pitch, if force exerted by pitcher is 30N
Human skin is most sensitive to ultraviolet light of approximate wavelength 300 nm. Find the energy of a single photon of such light
When a diver jumps into a lake, water leaks into the gap region between the diver's skin and her wetsuit, Estimate how much energy (in units of candy bars = 300 kcal) is required by this heating process
A three-legged wooden bar stool made out of solid Douglas fir has legs that are 2.5cm in diameter.When a 65 man sits on the stool, by what percent does the length of the legs decrease
pipe open at one end only has a fundamental frequency of 237 Hz. A second pipe, initially identical to the first pipe, is shortened by cutting off a portion of the open end. Currently, when both pipes vibrate at their fundamental frequencies, a beat ..
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