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A burning firecracker is tossed into the air at an angle of 60 degrees up from the horizon. If it leaves the hand of the hurler at the speed of 30 m/s, how long should the fuse be set to burn if the explosion is to occur 20 m away. Ignore friction and set up the equation for t.Please show steps.
In one of the original Doppler experiments, a tuba was played at a frequency of 92.0Hz on a moving flat train car, What beat frequency was heard in the station if the train car approached the station at a speed of 7.00m/s
You are testing a new amusement park roller coaster with an empty car with mass 123 kg. One part of the track is a vertical loop with radius 11.1 m, how much work is done by the friction
A dielectric-filled parallel-plate capacitor has plate area A = 10.0cm2 , plate separation d = 5.00mmand dielectric constant k = 5.00. Find the energy U1 of the dielectric-filled capacitor
A C1=25 uF capacitor is charged to 4.0kV and then removed from the battery and connected to uncharged C2=45uF capacitor. which capacitor stores more energy and why
A proton moving at 7.6 × 106 m/s through a magnetic ?eld of 8.8 T experiences a magnetic force of magnitude 2.5 × 10?12 N. What is the angle between the proton's velocity and the field
a water molecule consists of an oxygen atom with two hydrogen atoms bound to it . the angle between the two bonds is
Assuming that the ram spring is oriented vertically and is still compressed by 1.17 10-2 m when the downward-moving ram hits the staple, find the speed of the ram at the instant of contact
A disk-shaped merry-go-round of radius 2.63 m and mass 155 kg rotates freely with an angular speed of 0.641 rev/s. What is the final angular speed of the merry-go-round
A compound microscope has a barrel whose length is 16.0 cm and an eyepiece whose focal length is 1.6 cm. What focal length must the objective have
A well insulated rigid vessel also contains 3 kg of saturated liquid water at 40 oC. The vessel also contains an electrical resistor that draws 10 amperes when 50 volts are applied.
A sound wave in air has a frequency of 264Hz and travels with a speed of 347m/s. How far apart are the wave crests
You are pushing a refrigerator across the floor of your kitchen. You exert a horizontal force of 297 N for 7.4 s, what is the total work (by all forces) done on the refrigerator
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