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Two different electrical devices have the same power consumption, but one is meant to be operated on 120-V AC and the other on 240-V AC. What is the ratio of their currents
A cubical box is filled with sand and weighs 798 N. We wish to "roll" the box by pushing horizontally on one of the upper edges. What minimum coefficient of static friction between box and floor is r
Find the speed of an orbiter in a circular orbit that is just above the surface of a planet, given that the orbiter's acceleration is equal to the planet's gravitational acceleration of 2.36 m/s2
A certain centrifuge produces a centripetal acceleration of magnitude exactly 1230g at a point 11.9 cm from the axis of rotation. Find the number of revolutions per second
A transverse wave on a string is described by the following wave function. y =0.085 sin((pie/12x) +(5piet)), What is the speed of propagation of this wave
A 40-g object connected to a spring with a force constant of 30 N/m oscillates with an amplitude of 8 cm on a frictionless, horizontal surface. Find the total energy of the system
A 1.00 kg object is attached to a horizontal spring. The spring is initially stretched by 0.2 m, obtain the maximum speed of the object
What would be the height of the atmosphere if the air density were uniform and decreased linearly to zero with height
A cylindrical tank with a large diameter is filled with water to a depth D = 0.298 m. What is the rate at which water flows out
Each graph will have five different graph lines with: group A, group B, group C, group D, group F information of transmittance (1st graph) and absorption (2nd graph)
A transformer with a turns ratio (secondary/primary) of 1:15 is used to step down the voltage from a 120-V wall socket to be used in a battery recharging unit
Two uniform solid cylinders, each rotating about its central (longitudinal) axis, have the same mass of 3.74 kg, What is the rotational kinetic energy of the smaller cylinder
A flywheel with a diameter of 0.510 m is rotating at an angular speed of 178 rev/min. What is the linear speed of a point on the rim of the flywheel
The angular position of a point on the rim of a rotating wheel is given by %u03B8 = 4.01t - 6.34t2 + 2.63t3, What are the angular velocities at t = 3.19 s and t = 6.06 s
A body of mass 1.2 kg makes an elastic collision with another body at rest and continues to move in the original direction but with 1/7 of its original speed. What is the mass of the other body
A 30 kg launching machine fires a 250 gram projectile horizontally at 100 m/s. What was the momentum of the machine
A 48.9 kg girl is standing on a 129 kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. What is the velocity of the plank relative to t
A white dwarf star has surface temperature 20 kK. Where is the Wien peak in this star s blackbody curve
Two radio antennas operating at 6.00 Mhz are separated by 120.0m along a North-South line. Find the directions on the compass in which no radiation is sent out
A 1500 kg Prius and a 2400 kg Ford F150 pickup truck are approaching an unmarked intersection. What is the speed of the Ford at the moment of impact
A 328 kg rocket moving radially outward from Earth has a speed of 7.28 km/s when its engine shuts off 173 km above Earth's surface. What maximum height (in km) above the surface is reached by the roc
A spotlight at the bottom of a pool emits a cone of light upward 22 degrees wide. n= 1.33, How wide (as angle w) is the cone of ligh outside of the pool
A pulley hanging off the side of a building supports a 0.57 kg bucket on a rope. The pulley releases rope as the bucket is lowered to the ground. What is the distance to ground
Over a certain region of space, the electric potential is V = 4.2x-3.6x^2y+1.5yz^2. On scratch paper, What is the magnitude of the field at the point P
A runner is running the first heat of a100 m race at a velocity of 6.9 m/s in an easterly direction. What is the relative velocity of the runner to the wind