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During a workout, the football players at State U. ran up the stadium stairs in 60 s. The stairs are 150 m long and inclined at an angle of 30°. If a typical player has a mass of 105 kg, estimate the average power output on the way up. Ignore friction and air resistance.
Three identical masses of 360kg each are placed on the x axis. One mass is at = -110cm , one is at the origin, find the magnitude of the net gravitational force on the mass
A student stands on a platform that is rotating without friction at 1.2 rev/s. His arms are outstretched and he holds a brick in each hand. what is the new angular speed of the system
For gas storage, thick metal cylinders whith an internal volume of 25 litres are used; typical cylinders can safely maintain a pressure of 180 atm. how many moles of gas can such a cylinder hold
A 5000 kg spaceship is positioned 140 km from the center of planet X and 581 km from the center of planet Y, find the magnitude of the total gravitational force on the spaceship
Describe a solar cell. In your description, include the description, the efficiency of the cell and what the cell produces. Describe solar thermal energy
A torsion pendulum is constructed of a copper rod of radius 3 mm and length 50 cm. what is the period of oscillation
A neutron at rest decays in to a proton and an electron. how much kinetic energy (in MeV) are shared by the electron and proton? can a proton decay into a neutron and a positron?
Speed of an aircraft at takeoff when launched from a catapult on an aircraft carrier The catapult on an aircraft carrier can take an aircraft from 0 to 207 mph in 9 seconds, at which time the aircraft launches.
Consider single slit Fraunhofer, what is the ratio of irradiance at the central peak maximum to the first of secondary peak
When a 0.2 kg mass is suspended from a vertically hanging spring it stretches the spring from its original length of 0.5 cm to a total length of 6.0 cm. what is the maximum speed of the mass as it oscillates
In an LC circuit in which C = 4.0?F the maximum potential difference across tha capacitor during the oscillations is 1.5V and the maximum current through the inductor is 50 mA.
A thin gold ring of radius 1.11 cm carries a uniform charge per unit length of 1.1e-14 C/m. Find the electric field on the axis of the ring
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