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When at rest, two trains have sirens that emit a frequency of 300Hz. The trains travel toward one another and toward an observerstationed between them. One of the trains movesat 26.0 m/s, and the observerhears a beat frequency of2.6 beatsper second. What is the speed of the second train, which travelsfaster than 26.0 m/s?
A ball of mass 8.9 g with a speed of 22.4 m/s strikes a wall at an angle 14.0o and then rebounds with the same speed and angle. find the magnitude of the impulse associated with the collision force
A 1290kg car and 4860kg truck undergo a perfectly inelastic collision. Before the collision, the car was traveling southward at 1.80m/s, Find the velocity of the wreckage immediately after the collision
A 0.150 T magnetic field B crosses the xy plane perpendicular to the x axis and at an angle of 70.0° to the y axis. What is the total magnetic flux through the surface
Two circular disks, each of area 1.90E-4 m2, are situated parallel to one another. The distance between them is small compared with their radii, Compute the force exerted by one on the other
A large reflecting telescope has an objective mirror with a 10.0 m radius of curvature. what angular magnification does it produce
A uniform plank, 10.0 m long and weighing 200 N, is supported horizontally by a brick at one end and an egg at the other. What is the force exerted on the plank by the brick
q1. black holes are suspected while a visible star is being noticeably pulled by an invisible partner that is more
24.0g of copper pellets are removed from a 300 ? C oven and immediately dropped into 120mL of water at 24.0 ? C in an insulated cup. What will the new water temperature be
questiona hunter wishes to cross a river that is 2.5 km wide and that flows with a speed of 4.8 kmh. the hunter uses a
A 20.0-kg box rests on a horizontal surface. The coefficient of static and kinetic friction between the box and the surface are 0.30 and 0.10 respectively
The team monitoring a space probe exploring the outer solar system finds that radio transmissions from the probe take 1.77 hours to reach earth. How distant (in meters) is the probe
A rectangular fish tank measures 30 cm by 65 cm by 40 cm high. What is the total force of the water on the bottom
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