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A football is kicked across a level field. The ball spends 2.53 s in the air and lands 55.9 meter from the point where it was kicked. Find the speed of the ball at the top of its trajectory? (Neglect air resistance; g = 9.8 m/s2).
A 100 W lightbulb is plugged into a standard 120 V outlet. How much does it cost per month (30 days) to leave the light turned on continuosly? Assume electrical energy costs 7.5/kWh. (Enter dollars with no unit) What is the resistance of the bulb? Wh..
Two small, positively charged spheres have a combined charge of 5.43×10-5 C. If each sphere is repelled from the other with an electrostatic force of 1.00 N when the spheres are 2.07 m apart, what is the charge on the sphere with the smaller charge?
An isolated piston+ cylinder arrangement shown contains a diatomic ideal gas at 300 K at equilibrium. find the new equilibrium temperature of the gas
The threshold of hearing in air corresponds to a frequency of 1000 Hz and an intensity of about 9.5 x 10?13 W/m^2 When someone under water hears such sound, what is the corresponding maximum displacement
The threshold of dark-adapted (isotopic) vision is 6.0 multiplied by10-11 W/m2 at a central wavelength of 450 nm. If light with this intensity and wavelength enters the eye when the pupil is open to its maximum diameter of 8.5 mm, how many photons pe..
Four identical springs are used as part of a car's suspension system, one on each wheel. What will be the frequency at which the car will bounce
A pool ball istraveling at 2.0 m/s towards an identical pool ball, which isinitially at rest. After thecollision, the first ball moves with a speed of 1m/s at an angle of10o with respect to thepositive x - axis. Find the velocity of the second cuebal..
earth-ionosphere capacitance the earth can be considered as a single-conductor capacitor see problem 24.67. it can also
An 800-N billboard worker stands on a 4.0-m scaffold supported byvertical ropes at each end. what is the tension in the ropenearest the worker
An object on the ground is lunched at 10.0m/s at an angle of 75.0 above the horizontal. what is the horizontal displacment of the object
1. A 50.0 kg block is pulled from rest by a force of 1000.0 N at an angle of 37.0° across a horizontal rough surface over a distance of 5.60 m. The coefficient of kinetic friction between the block and the surface is 0.500.
A certain freely falling object, released from rest, requires 1.50 s to travel the last 30.0 m before it hits the ground. Find the velocity of the object when it is 30 m above the ground
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