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An object is made of glass and has the shape of a cube 0.11 m on a side, according to an observer at rest relative to it. However, an observer moving at high speed parallel to one of the object's edges and knowing that the object's mass is 3.1 kg determines its density to be 7000 kg/m3, which is much greater than the density of glass. What is the moving observer's speed (in units of c) relative to the cube?
Three resistors, 20 %u03A9, 50 %u03A9, and 82 %u03A9, are connected in series, find the potential difference across this equivalent resistance
A hot-air balloon is travelling upwards with a constant speed of 12 m/s. An object fell from the balloon when it was at the height of 1000 m
A simple pendulum is 0.50m long. At t=0 it is released from rest starting at an angle of 10 degrees.Ignoring friction, what will be the angular position of the pendulum
Two point charges of equal magnitude are 7.3cm apart. At the midpoint of the line connecting them, their combined electric field has a magnitude of 40N/C . Find the magnitude of the charges.
A gallon of gasoline contains about 1.3x10^8 joules of energy. A 2000-kg car traveling 20 m/s skids to a stop. Estimate how much gasoline it will take to bring the car back to the original speed
A small object with a momentum magnitude 6.0 kg m/s approaches head on a target at rest. What is the magnitude of the small objects momentum change
An airplane with a speed of 89.1 m/s is climbing upward at an angle of 31.5 ° with respect to the horizontal. Relative to the ground, determine the angle of the velocity vector of the package just before impact
A cosmic-ray proton is moving at such a speed that it can travel from the Moon to Earth in 1.5s. At what fraction of the speed of light is the proton moving
Two men decide to use their cars to pull a truck stuck in mud. What is the net forward force exerted on the truck in the direction it is headed
An object, 0.75 cm tall, is placed 12.0 cm to the left of a diverging lens (f = -8.00 cm). determine the focal length of the converging lens
One January morning, a warm chinook wind rapidly raised the temperature in Spearfish, South Dakota, from below freezing to +11.1° C. Find the average speed at which its height would decrease
LASIK is a corrective surgical procedure intended to reduce a person's dependency on glasses or contact lenses by actually modifying the shape of the cornea, What is the average intensity during each pulse
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