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A subject weighing 140 pounds wants to exercise at 4 METs on the arm ergometer. If the resistance is set at 1.5 kp, how fast will this person have to crank the hand pedals (assume the flywheel moves 2.5 m per pedal revolution)?
Why is you are not harmed with the contact of a charged metal ball, although its voltage may be very high? Is the reason similar to why you are not harmed by greater-than-10000 C sparks from the Fourth-of-July sparkler? Define your answer in terms..
An electic dipole has charges of +or- 4.10pC that are separated by 6.25cm. Determine the net force on the dipole
A ball is thrown vertically upwards with an initial velocity of 21.84 m/s. Neglecting air resistance, how long is the ball in the air? What is the greatest height reached by the ball
a proton and an alpha particle q 2e m 4 u are fired directly toward each other from far away each with an initial
The coefficient of linear expansion of copper is 17 × 10-6 K-1. A sheet of copper has a round hole of radius 1.5 m cut out of it. what is the change in the area of the hole
A constant-volume gas thermometer reads 50.0 torr at the triple point of water. What ideal-gas temperature corresponds to a pressure of 678 torr
When a mass of 25 g is attached to a certain spring, it makes 19 complete vibrations in 4.5 s. What is the spring constant of the spring
An object is placed 14.0 centimeter in front of a convex mirror, the image being 6.65 centimeter behind the mirror. Find how far in front of the mirror is the second object placed
A spacecraft flies in the horizontal direction at a speed of v=0.980c, What is the slope angle to an astronaut on the spacecraft
A physics teacher tells her class that their final project requires the students to measure a specific variable and determine the velocity of a car with no more than 2.5% error. Will Jennifer and Johnny pass their final project
A 46 gram marble moving at 2.3 m/s strikes a 24 gram marble at rest. Suppose the collision is perfectly elastic and the marbles collide head-on. Find the speed of the second marble after the collision
The temperature of your skin is approximately 36oC. Find the wavelength at which the peak occurs in the radiation emitted from your skin
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