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A duck is swimming down a river and passes a slow moving log. If the duck is moving 2.50 times faster than the log, but the log has 3.75 times the kinetic energy of the duck, what is the ratio of the log\'s mass to the duck\'s mass?
If the log had a mass of 35.2 kg, and the duck was swimming at 3.00 m/s, what is the log\'s kinetic energy? Be sure to include units.
A 48.9 g ball of copper has a net charge of 3.0 µC. What fraction of the copper's electrons have been removed
What average force is required to accelerate 7 gram pellet from rest to 125 m/s over a distance of .8 m along the barrel of a rifle.
three identical thin rods each of length l and mass m are welded perpendicular to one another as shown in figure
A cowboy stands on horizontal ground between two parallel vertical cliffs. He is not midway between the cliffs. What is the distance between the cliffs
q1. a 20 kg block is at rest on a horizontal floor. if you push horizontally on the 20 kg block with a force of 50 n it
A passenger car traveling due east at 53.6 m/s passes a truck traveling due east at 13.4 m/s. What is the frequency heard by the driver of the car
An outfielder throws a 0.150 kg baseball at a speed of 54.0 m/s and an initial angle of 30.0°. What is the kinetic energy of the ball at the highest point of its motion
A radio station with a power of 20 kW sends out an omnidirectional wave at 1.25 MHz. If the electromagnetic wave has an electric field of 0.22 V/m, what is the magnetic field amplitude
Time standards are now based on atomic clocks. A promising second standard is based on pulsars, what is the associated uncertainty
A capacitor consists of two concentric conducting spherical shells with radii R1 and R2 = 4.0R1. It has capacitance C = 4.0 pF, and is charged to a potential difference of 60.0 V. by what factor does the stored energy change
q1. a woman rides a carnival ferris wheel at radius 13 m completing 4.0 turns about its horizontal axis every minute.
The intensity of solar radiation at the top of the Earth's atmosphere is 1506 W/m2. find the amount of solar energy you absorb
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