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One mole of helium atoms has a mass of 4 grams. If a helium atom in a balloon has a kinetic energy of 1.224e-21 J, what is the speed of the helium atom? (The speed is much lower than the speed of light.)
High-speed stroboscopic photographs show that the head of a 240-g golf club is traveling at 52 m/s just before it strikes a 46-g golf ball at rest on a tee. Find the speed of the golf ball just after impact
Light of intensity 0.5 W/m2 passes through the pupil of one of your eyes and eventually falls on your retina. how much light energy passes through in one minute
Two waves of the same frequency have amplitudes 0.961 and 2.16. What is the resultant amplitude
q1.a race car starts from rest on a circular track of radius 453 m. the cars speed increases at the constant rate of
A 305 turn solenoid has a radius of 7.00 cm and a length of 24.0 cm. Find the inductance of the solenoid
A hollow spherical shell with mass 2.00 kg rolls without slipping down a 38.0 degree slope, find the friction force on it
The work fuction of a particular substance is 7.81*10^-19 J. What is the photoelectric cutoff wavelength for this material
A 1meter long rod has a circular cross-section with an area of 2 m^2, How far from the left end is the center of mass of the rod
q1. a 35.0-kg child swings in a swing supported by two chains each 2.90 m long. the tension in each chain at the lowest
A camera flashtube requires 8J of energy per flash. The flash duration is 2m/ss}. What power does the flashtube use while it's flashing?
If a low-pressure sodium vapor lamp emits 50 W of yellow light, how many photons does it emit each second
What is the direction of the object's acceleration after it is free. What is the magnitude of the objects acceleration.
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