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Which of the following would have the highest power rating?
1. 100 joules of energy used in 0.5 seconds.
2. 500 joules of energy used in 0.5 seconds.
3. 100 joules of energy used in 0.25 seconds.
4. 500 joules of energy used in 0.25 seconds.
The froghopper, Philaenus spumarius, holds the world record for insect jumps. What horizontal distance did the froghopper cover for this world-record leap
A heavy piece of hanging sculpture is suspended by a 146.0 cm long, 8.03 gm wire. When the wind blows hard, wire hums at its fundamental frequency of 113.0 Hz. What is the mass of the sculpture (in kg) assume that the local acceleration due to gravit..
A 950kg car is at the top of a 40m -long, 2.5 degree incline. What the first car's speed would have been at the bottom had it not struck the second car
A capacitor has parallel metal plates of dimensions 12 cm *24 cm seperated by an air gap of .750 mm. the plates are given opposits charges +25 uc, -25uc. find how much energy is stored in the capacitor
A light beam of wavelength 500 nm in air hits transparent material. When the angle of refraction is 40.0 degrees, Find the polarizing angle
a dolphin leaps out of the water at an angle of 23.3 deg above the horizontal. the horizontal component of the dolphins
A hydrogen like ion Mg 11+ drops from its n=2to its n=1 level. What is the wavelength of the photonemitted? What sort of radiation is this
Transverse waves of amplitude 0.8 mm travel at 60 m/s along a ropeof linear mass density 3.5 g/m. A 50 Hz oscillator is connected toone end. What is the average power supplied by the oscillator
A certain drawbridge can be modeled as a uniform 1.60×104N bar, 10.0m long, pivoted about its lower end. When this bridge is raised to an angle of 60.0 above the horizontal, the cable holding it suddenly breaks, allowing the bridge to fall. At the..
say the electrical company needs to step down the voltage from 7200v rms in the power line behind your house to the
if the coefficients of static and kinetic friction between the 20kg block a and the 100kg cart b are both essentially
A 2500 kg car rounds a flat curve of radius 75 m at speed of 80 km/h. if the pavement is icy and the force of static friction is 6000 n, what is the maximum speed the car could safely go around the curve
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