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A propeller is modeled as five identical uniform rods extending radially from its axis. what is its rotational kinetic energy
What is he wavelength of a 22.75*10^9 Hz radar signal. What is the frequency of an X-ray with wavelength 0.12nm
A 27.0-kg child on a 3.00-m-long swing is released from rest when the ropes of the swing make an angle of 35.0° with the vertical, Neglecting friction, find the child's speed at the lowest positi
An object with total mass mtotal = 14 kg is sitting at rest when it explodes into three pieces. One piece with mass m1 = 4.6 kg, What is the magnitude of the velocity of the center of mass of the piec
A current of 74.8 mA exists in a metal wire, In what direction do the electrons travel with respect to the current
A 0.360 kg pendulum bob passes through the lowest part of its path at a speed of 2.86 m/s, When the pendulum reaches its highest point, what angle does the cable make with the vertical
When a-particles with energy of 5MeV are scattered on a thin gold foil, it is found that 10,000 a-particles are scattered at an angle greater than 50o, How many will be scattered between 70o and 80o
Think of the relationship between Kirchoff's Junction Rule and conservation of charge, Why cant charge build up at a junction of wires
A device operates in a three process cycle. In process one, the device receives 35kJ of heat and does no work. Determine the COP or efficiency as applicable
A curve of radius 65 m is banked for a design speed of 100 km/h. If the coefficient of static friction is 0.30 (wet pavement), at what range of speeds can a car safely make the curve
An initially uncharged air-filled capacitor is connected to a 4.01-V charging source, Find the capacitor's potential difference and charge after the insertion
The membrane that surrounds a certain type of living cell has a surface area of 4.5 x 10-9 m2 and a thickness of 1.1 x 10-8 m, how many such ions are present on the outer surface
Two protons are maintained at a separation of 803 nm. Calculate the electric potential due to the two particles at the midpoint between them
In one day, a 90kg mountain climber ascends from the 1520m level on a vertical cliff to the top at 2360m, What is her change in gravitational potential energy on the first day
Tarzan, in one tree, sights Jane in another tree. He grabs the end of a vine with length 20 m that makes an angle of 45, Calculate Tarzan's speed just before he reaches Jane
An ideal spring of negligible mass is 11.00cm long when nothing is attached to it, If you wanted to store 10.0 J of potential energy in this spring, what would be its total length? Assume that it con
A slingshot will shoot a 10-g pebble 22.0 mstraight up. How much potential energy is stored in the slingshot's rubber band
Write at least one paragraph in which you define diffraction and interference, discuss Huygens' Principle and explain why light passing through a narrow slit
it takes 100 minutes for a middle-aged physics professor to ride his bicycle up the road to Alpe d'Huez in France, What is the bicyclists average power output
How much work is done on the car by the engine when accelerating the car from rest to 90m/s, What is the average power delivered by the engine
A projectile is launched with an initial speed of 50 m/s at an angle of 35° above the horizontal, What is the projectile's velocity at the highest point of its trajectory
The mass of a robot is 4340 kg. This robot weighs 3000 N more on planet A than it does on planet B. Both planets have the same radius of 2.37 × 107 m
A football is kicked with a speed of 20m/s at an angle of 40 degrees to the horizontal, how long is the football in the air
An uncharged capacitor is connected to the terminals of a 2.0V battery, and 9.0?C flows to the positive plate, How much additional charge flows to the positive plate
A cyclist intends to cycle up a hill whose vertical height is 170m.. Assuming the mass of bicycle plus cyclist is 75 kg