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A weightlifter is attempting a biceps curl with a 200 N barbell. The moment arm of the barbell about the elbow joint is 40cm. What torque is created by the barbell about the elbow joint?
The transverse displacement (y) of a wave is given as a function of position (x in meters) and time (t in seconds) by the expression to the right. Determine the wavelength, frequency, period, and phase constant of this waveform.
1. In an unbalanced Wheatstone bridge the potential across the galvanometer is not zero. If the galvanometer resistance is 20?, what is the galvanometer current? Take R1 = 4?, R2 = 1?, RS = 6?, RX = 3?, R = 0 ?, and V = 20V. [Hint: neglect resisto..
A simple pendulum has a length of 2.1 meter and is pulled a distance y = 0.19 meter to one side and then released. Evaluate the speed of the pendulum when it passes through the lowest point on its trajectory
Three electrons are aligned on a straight line and separations between them are 1.0mm. What is the electric potential energy of the center electron
A 2,200-kg car moving east at 10.0 m/s collides with a 3,000-kg car moving north. Find the speed of the 3,000-kg car before the collision
What is the function of the acoustic absorber? What is the function of the transducer housing
But I used to think that he wanted to calculate the energy density of radiation in side the black body ,So we should calculate the avarage energy for those radiation em waves or the energy which is emitted by those electrons , not the avarage ener..
A balloon carrying a basket is descending at a constant velocity of 20.0 m/s. how far is it from the basket
find the arrow's initial speed? How long did it take for the arrow to first reach a height of 17.5 m above its launch point.
A 2.50 g bullet, traveling at a speed of 465 m/s, strikes the wooden block of a ballistic pendulum. The block has a mass of 275 g. What is the speed of the bullet/block combination immediately after collision.
Glenn gently pours acetic acid, index 1.27 onto some antimony trioxide, index of refraction 2.35. What angle will Glenn find in the acetic acid
An unknown mass is hung from a very light spring with a spring constant of 19 N/m. evaluate what is the unknown mass
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