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Light of wavelength 659.9 nm is emitted by a star. The wavelength of this light as measured on Earth is 660.9 nm. How fast is the star moving with respect to Earth?
A 0.599 kg object is at rest at the origin of a coordinate system. A 3.76 N force in the positive x direction acts on the object for 2.46 s. What is the velocity at the end of this interval
A string 0.5 m long with mass density 0.0003 kg/m and is vibrating 200 cycles per second. What hanging mass would produce this tension
Two charged bodies exert the force of 0.185N on each other. If they are moved so that they are one-fourth as far apart, what force is exerted.
A meter rule is balanced at the 70 cm mark by placing a 200-g mass at the 80 cm mark. At what point will the ruler balance if the 200-g mass is moved to the 90 cm mark
Assume that the intensity of solar radiation incident on the cloudtops of the Earth is 1340 W/m^2. Calc the total power radiated by the Sun, taking the average Earth-sun separation to be 1.496 * 10^11 m.
104.05 J of energy are transferred to a system in the form of heat while the internal energy decreases by 57.65 J. How much work is done by the system
Each second, 5525 m3 of water flows over the 670-m-wide cliff of the Horseshoe Falls portion of Niagara Falls. How far from the base of the cliff is the barrel
a hockey puck on a frozen pond with an initial speed of 18.9 ms stops after sliding a distance of 240.3 m. calculate
The power P of an Electric circuit varies jointly with resistance , R and with the square of the current, I. find the power if the current is 2.00 A and the resistance is 2.00 ohms
Kenny throws a basketball which has an initial speed v0. When the ball gets to its mininum speed sometime before striking the ground, What was the initial angle of the ball
A 1.00 kg object is attached to a horizontal spring. The spring is initially stretched by 0.500 m, and the object is released from rest there. What is the maximum speed of the object
An electron in an oscilloscope is accelerated as a result of the potential difference between the cathode and anode. The electron has negligible initial speed and a final speed of 2.40 107 m/s. Find the voltage drop from cathode to anode.
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