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A 60 kg bicyclist rides his 9.8 kg bicycle with a speed of 16 m/s.
a.)How much work must be done by the brakes to bring the bike and rider to a stop?
b.) How far does the bicycle travel if it takes 4.0 s to come to rest?
c.) What is the magnitude of the braking force?
An AC power generator produces 50 A (rms) at 3600 V. The voltage is stepped up to 100 000 V by an ideal transformer and the energy transmitted throughout a long-distance power line with a total resistance of 100 Omega. What is the rms current in l..
A rescue helicopter lifts a 84.2-kg person straight up by means of a cable. The person has an upward acceleration of 0.759 m/s2, What is the tension in the cable
A diffraction grating of 6000 lines/cm is illuminated by monochromatic light. How far from the central maximum is the first order maximum
In February 2004, scientists at Purdue University used a highly sensitive technique to measure the mass of a vaccinia virus (the kind used in smallpox vaccine). What is the mass of the virus in femtograms
Where can a third charge be placed. To what common temperature must the two pieces be heated in order that the cylinder just fit over the piston.
The coefficient of kinetic friction between dresser and the floor is and is the acceleration because of gravity. The floor exerts upward normal forces with magnitudes and where the dresser's legs rest on the floor. Note that this is a 2-dimensiona..
A 81.0-kg daredevil exhibitionist hangs on to the end of a long bungee cord attached to the railing of the Brooklyn Bridge and oscillates vertically, What is the frequency of oscillation
A certain type of laser emits light that has a frequency of 5.2 x 10^14 Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 2.7 x 10-11 s. How many wavelengths are there in one pulse.
A water pipe having a 2.96 cm inside diameter carries water into the basement of a house at a speed of 0.804 m/s, find water pressure and speed at the second floor
A 1.00 kg beaker containing 2.00 kg of oil (density=900kg/m^3 rests on a scale, Find the equilibrium readings of both scales
A generating station is producing 1.90 106 W of power that is to be sent to a small town located 5.0 km away. Find the power used to heat the wires if the power is transmitted at 1050 V
Three blocks, each of mass 9 kg are on a frictionless table. A hand pushes on the left most box (A) such that the three boxes accelerate in the positive horizontal direction, What is the magnitude of the force on block A from the hand
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