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When you see a traffic light turn red, you apply the brakes until you come to a stop. If your initial speed was 17 , and you were heading due west, what was your average velocity during braking? Assume constant deceleration.
What approximations or simplifying assumptions must you make in the calculations? (Note: Some of these choices are false because they are wrong physics!)
2.1 g of helium at an initial temperature of 120 deg C and an initial pressure of 1.0 atm undergo an isothermal expansion until the volume has doubled. What is the change in thermal energy of the gas
A 0.498 kg air cart is attached to a spring and allowed to oscillate. Calculate the maximum kinetic energy of the cart
A frictionless simple pendulum on Earth has a period of 1.75 s. On Planet X its period is 2.14 s. What is the acceleration due to gravity on Planet X
the first-order line of 571 nm light falling on a diffraction grating is observed at a 17.9 deg angle, at what angle will the third order be observed
Two boats start together and race across a 56km wide lake and back. Boat A goes across at 56 km/h and returns at 56km/h. Boat B goes across at 28km/h, and its crew, realize how far behind it is getting.
In the fastest measured tennis serve, the ball left the racquet at 73.14 m/s. How far did the ball travel during the serve
A spool of thin wire rotates without friction about its axis. A man pulls down on a wire connected to an inner radius with force of 16.10 N. How long does it take to enlarge the angular velocity of the spool from 11.00 rad/s to 39.00 rad/s? Icm = ..
The leg and cast weigh 200 N, with the center of mass as indicated by the blue arrow. The counterbalance w1 weighs 110 N. find out the weight w2 and the angle α needed so that no force is exerted on the hip joint by the leg plus cast.
A copper block is removed from a 300^0 C oven and dropped into 1 L of water at 20.0^0 C. The water quickly reaches 25.5^0 C and after that remains at that temperature. What is the mass of copper block.
A movie camera with a (single) lens of focal length 75.0 mm takes a picture of a 177 cm high person standing 30.0 m away
Calculate escape velocity for an object started at the surface of the earth, going straight up. Neglect any complications due to the earth turning.
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