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A sprinter running the 100 m dash has a constant acceleration of 2.8 m/s2 for the first 4.1 seconds of the race, when he reaches his top speed, and then continues to run at that speed for the rest of the race.
How long does it the sprinter to run the race?
A gamma-ray photon produces an electron-positron pair, each with a kinetic energy of 255 keV. What was the wavelength of the photon
The robot HooRU is lost in space, floating around aimlessly, and radiates heat into the depths of the cosmos at the rate of 11.5 W. What is HooRU\'s temperature
a catcher catches a 145 g baseball traveling horizontally at 36.0 m/s. How large an impulse does the ball give to the catcher, what average force did the ball exert on the catcher
Calculate the shortest wavelength that will be emitted from an X-ray tube in which the electron beam has been accelerated through a potential difference of 30 kV
An electric vehicle starts from rest and accelerates at a rate of 2.4 m/s2 in a straight line until it reaches a speed of 25 m/s. How much time elapses from start to stop
A proposed space station includes living quarters in a circular ring 52.0 m in diameter. At what angular speed should the ring rotate
A proton with a speed of 2.5 × 106 m/s is shot into a region between two plates that are separated by a distance of 0.16 m. What must be the magnitude of the magnetic field
An airplane's takeoff speed is 320 km/h. If its average acceleration is 2.90 m/s^2, how long is it on runway after starting its takeoff roll.
A 105 kg fullback is running at 4.8 m/s to the east and is stopped in 0.75 s by a head-on tackle by a tackler running due west. Calculate the average force exerted on the tackler
Two boxes A and B are connected to each end of a light vertical rope. A constant upward force 80.0 is applied to box. Starting from rest, box descends 10.4 in 3.40. The tension in the rope connecting the two boxes is 37.0
Three resistors with values 1.0 , 2.2 , and 5.5 , respectively, are connected in parallel in a circuit with a 5.0 V battery. What is the total equivalent resistance
A battery supplies 0.77 A to three resistors connected in parallel. What is the exact current (in A) through the third resistor
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