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A 73kg hiker climbs to the top of a 4000m -high mountain. The climb is made in 5.5h starting at an elevation of 2900m.
A. Calculate the work done by the hiker against gravity.
B. Calculate the average power output in watts.
C. Calculate the average power output in horsepower.
D. Calculate assuming the body is 16% efficient, what rate of energy input was required.
You do a physics lab experiment on another planet. A small block is released from rest at the top of a long frictionless ramp that is inclined at an angle of 36.9° above the horizontal, What is the value of g
A piece of copper wire has a resistance per unit length of6.1510-3?/m. Find the magnetic field strength at the center of the coil
An air-filled capacitor consists of two parallel plates, each with an area of 7.60 cm2, separated by a distance of 1.70 mm, Calculate the electric field between the plates and Calculate the capacitance
A driver travels 10 km east, 20 km north and 50 km in a direction 30 degrees south of west. What is the drivers average velocity if the trip takes 90 minutes
Calculate the magnitude of the electric field at the origin due to the following distribution of charges: -q at (x,y) = (a,a), +q at (a,-a), +q at (-a,-a) and -q at (-a,a)
A stone is thrown horizontally from the roof of a tall building with a speed of 23.3 m/s. If the cliff is 26.5 high and stone lands on level parking lot below, how far from the building will the stone land?
Two ropes are attached to a heavy box to pull it along the floor. One rope applies a force of 438 newtons (N) in a direction due west; the other applies a force of 402N in a direction due south.
If the barge can only be pushed 18 cm deeper into the water before water overflows to sink it, how many 400 kg horses can it carry.
In a television set, electrons are accelerated from rest through a potential difference of 22 kV. Find the magnitude of the maximum magnetic force
A vertical heat-insulated cylinder is divided into two parts by a movable piston of mass m. Find the final temperature of the gas
A helium-neon laser emits light of wavelength 632.8 nm and has a power output of 2.0 mW. How many photons are emitted per second by this laser
A 50 kg diver in a full layout position, What is the diver's angular velocity when she assumes a tuck position, reducing her radius of gyration to 0.25 m
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