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If a washing machine's drum has a radius of 26 cm and spins at 4.0 rev/s, what is the strength of the artificial gravity to which the clothes are subjected? Express your answer as a multiple of g.
ar =_______ g
A small-scale steame engine operates between the temperatures 20oC and and 300oC, Calculate the efficiency of the Rankine cycle
An electron is in the fifth Bohr orbit of hydrogen. Calculate the time required for the electron to circle the nucleus
what is the kinetic energy of a ball of mass 16.1 kg at the apex (highest point) of its trajectory, if it is thrown with an initial speed of 45 mph
An airplane flies eastward and accelerates uniformly. At one position along its path it has a velocity of 32.3 m/s. Find the airplane's acceleration
Two crates, of mass 75.0 kg and 109 kg, are in contact and at rest on a horizontal surface. A 732 N force is exerted on the 75.0 kg crate. What is the force the each crate exerts on the other.
A 18kg child slides down a 2.5m -high playground slide. She starts from rest, and her speed at the bottom is 1.8m/s. What is the change in the thermal energy of the slide
a ball is hurled straight up at a speed of 15.0m/s, leaving the hand of the thrower 3.00 m above ground. What is the total distance traveled by the ball just as it passes the window the second time
The average threshold of dark-adapted (scotopic) vision is 4.00 10-11 W/m2 at a central wavelength of 500 nm. how many photons per second enter the eye
a 200kg ball is shot from a 2200kg cannon horizontally and positivly at 200m/s. what is the cannons speed, in respect of Earth
An air spaced parallel plate capacitor has an initial charge of 0.05 uC after being connected to a 10 V battery. Calculate the work done in pulling the plates apart
The position of a particle is given by x = 4.4 cos pt, where x is in meters and t is in seconds. Find the speed and acceleration of the particle when x = 2.3 m
A charge +q is located at the origin, while an identical charge is located on the x axis at x = +0.53 m. A third charge of +2q is located on the x axis at such a place that the net electrostatic force on the charge at the origin doubles, its direc..
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