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A person walks first at a constant speed of 4.90 m/s along a straight line from point A to B point and then back along the line from B to A at a constant speed of 3.30 m/s.
(a) What is her average speed over the entire trip?
(b) What is her average velocity over the entire trip?
A constant 0.28 T magnetic field passes through a loop at an angle of 35 degrees with respect to the normal of the area of the loop. find the flux through the loop
A school bus takes 0.89 h to reach the school from your house. If an average velocity of the bus is 21.1 km/h to the east, what is the displacement.
The temperature inside the refrigerator is 2.0 °C. It stands in a kitchen whose temperature is 22 °C, what is the entropy change of the kitchen
A bungee jumper with mass 63 jumps from a high bridge. After reaching his lowest point, he oscillates up and down, hitting a low point eight more times in 47. He finally comes to rest 21.00 below the level of the bridge.
ski jumper leaves the ski track moving at 25 m/s. The landing incline below her falls off with a slope of 33 degrees. How long is the ski jumper in the air
A person can just see this bulb from a distance of 800m, with the pupil diameter dialated to 7.5mm, how many photons per second are entering the pupil
A massless string runs around two massless, frictionless pulleys. An object with mass m = 12.20 kg hangs from one pulley. A force F is exerted on the free end of the string. What is the magnitude of the force F if the object is lifted at the constant..
A car is approaching a reflecting wall. A stationary observer behind the car hears a sound of frequency 790 Hz from the car horn and a sound of frequency 813 Hz from the wall. What is the frequency of the car horn
A 0.464-nm photon collides with a stationary electron. After the collision, the electron moves forward and the photon recoils backwards. Find the momentum of the electron
A pulsar is a collapsed, rotating star that sends out a narrow beam of radiation, like the light from a lighthouse. at what rate does an observer on the Endeavor see pulses emitted
A 54.00 kg bungee jumper has fallen far enough that her bungee cord is beginning to stretch and resist her downward motion. Find out the force (magnitude and direction) exerted on her by the bungee cord at an instant while her downward acceleratio..
A car approaches you at a constant speed, sounding its horn, and you hear a frequency of 76 Hz. What is the frequency o the sound emitted by the horn
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