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You set out to prove to a friend skeptical of the benefits of exercise that running does in fact increase your longevity. One hot and humid summer day, while your friend takes a snooze in the shade under a tree, you run around the tree in the blazing sun at a steady 12 mph = 5.4 m/s for what is, according to your wristwatch, one hour.
(a) For how long are you running according to your friend?
(b) How far do you perceive yourself to have run?
(c) How far have you run according to your friend?
(d) How much time will you have added to your life because of time dilation?
An inexpensive microscope has a tube length of 12.0cm and its objective lens is labeled with a magnification of 10x, Calculate the focal length of the objective lens
a bowling ball has a mass of 7.2 kg and radius of 0.11m. a billiard ball has a mass of 0.38 kg and a radius of 0.028 m.
A 740 gram grinding wheel 21.5 cm in diameter is in the shape of a uniform solid disk. What torque does friction exert while the wheel is slowing down
A positive charge of 4.10 µC is fixed in place. How close to the fixed charge does the particle get before it comes to rest and starts traveling away
a car enters a freeway entrance ramp going 35 miles per hour. it accelerates at a rate of 2.11nbspmss up the entrance
what is the minimum speed need to drive through a banked turn such a car wont slip down the road. the turn is banked at
Spring loaded gun fires a projectile to a heighten when fired straight up. What max height will the projectile reach when fired at an angle 45° from the vertical
The trap-jaw ant can snap its mandibles shut in as little as1.4x10 -4 s. In order to shut, both mandibles rotate during 91 degree angle. What is the normal angular velocity of one of the mandibles of the trap-jaw ant when the mandibles snap shut?
You are given a wooden rod 70 cm long and asked to drill a small diameter hole in it so that when pivoted about the the hole the period of the pendulum will be a minimum. How far from the center should you drill the hole
What is the maximum radius of the pulsar, if no part of its surface can move faster than the speed of light (3x 108 m/s)?
A 120 kg barrel which is initially at rest is rolled down an inclined plane. The friction between the barrel and the surface of the plane is negligible, calculate the barrel's velocity when it reaches the ground level
Calculate the period of rotation of the wheel T in seconds. What is the tangential speed of a point on the wheel's outer edge in m/s?
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