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Stan and Ollie are standing next to a train track. Stan puts his ear to the steel track to hear the train coming. He hears the sound of the train whistle through the track 2.4 s before Ollie hears it through the air. How far away is the train? (Use 5,790 m/s as the speed of sound in steel and 343 m/s as the speed of sound in air.) m
While exercising, the following physiological changes occur for a certain person. His systolic pressure increases by 46 %. Which change has the strongest effect on blood flow
Two blocks of masses m1 = 2.00 kg and m2 = 4.40 kg are each released from rest at a height of h = 4.00 m on a frictionless track, Determine the velocity of each block just before the collision
Your friend recently purchased a musical instrument that generates sound waves using several strings. Determine the length of the strings of this instrument
Find the resultant magnetic force exerted by the long wire on the square current loop in the figure below if I1 = 8.72 A and I2 = 4.12 A
You are given a sample of metal and asked to determine its specific heat. You weigh the sample and find that its weight is 25.7N. What is the sample's specific heat
A proton (mass 1.67 x 10^-27 kg) is moving at 1.30 x 10^-6 m/s directly toward a stationary helium nucleus (mass 6.64 x 10-27 kg ). what is the proton's velocity
Determine the escape velocity from the Sun for an object at the Sun's surface (r = 7.5 × 105 km, M = 2.0 × 1030 kg)
Krypton is a monatomic ideal gas. Suppose you have 4.0 moles of krypton at 293 K and 1 atm. How much work is involved in this process
A wire 11.80 m long carries a current of 1.30 A and makes an angle of 35.0 degrees with a uniform magnetic field of magnitude B=10.50 T. Calculate the magnitude of the magnetic force on the wire.
What must the charge (sign and magnitude) of a 1.49-g particle be for it to remain stationary when placed in a downward-directed electric field of magnitude 660N/C?
A spacecraft approaching the earth launches an exploration vehicle. After the launch, an observer on earth sees the spacecraft approaching at a speed of 0.45c and the exploration vehicle approaching at a speed of 0.80c. What is the speed of the explo..
Consider the motion of an apple and the Earth as the apple falls to the ground. If the apple begins at the top of a tree of height 11 m, Estimate the mass of an apple
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