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In each of the four scenarios to the right, a large bat lets out a short burst of ultrasonic sound, which the smaller bat hears a moment later. If the large bat flies at 14.60 m/s and the small bat flies at 4.520 m/s, rank the frequency that the smaller bat detects in the four scenarios, from highest to lowest. Assume that the speed of sound is 343.0 m/s.In scenario C, some of the large bat\'s signal reflects off of the small bat and returns to the large bat, warning it of the smaller bat\'s presence. If the initial signal has a frequency of 66.70 kHz, what return frequency will the large bat detect? Calculate the final frequency to four significant figures.
A car of mass m = 1365 kg is pushed off a cliff of height h = 29 m. what was the kinetic energy of the car the instant after it left the cliff
A student could either pull or push, at an angle of 30â?? from the horizontal, a 45kg crate on a horizontal surface, Calculate the minimum work required for both pulling and pushing
A race car has a mass of 703 kg. It starts from rest and travels 40.0 m in 3.0 s. The car is uniformly accelerated throughout the entire time. What net force is exerted on it.
a bar magnet is dropped through a loop of wire, what is the direction of the current at the instant it is in the middle
The electric field phasor of an electromagnetic wave in air is given by- E(z) = y 0.750 sin( 250 π z) V/m
Calculate the magnetic force per meter between two such lightning bolts separated by 10 meters. (This is mainly to give a feeling for the strength of the magnetic field)
A tank holds a layer of oil, 1.58 m thick, which floats on a layer of syrup that is 0.66 m thick. Both liquids are clear and do not intermix. A ray, The index of refraction of the syrup is closest to:
Consider an isolated metallic sphere of radius R and another isolated metallic sphere of radius 3R. If both spheres are at the same potential, what is the ratio of their potentials
Jamie pulls a box of 1.0 kg mass up an inclined plane by a constant force of 10 N that causes a displacement of 0.50 m. find the work done by the normal force on the object
a boy throws a rock with a rock with an initial velocity of 2m/s at 30 degree above the horizontal. how long does it take for the rock to reach the maximum height of its trajectory
the snow exerts a retarding force on the sled that points opposite to the direction of motion, and has a magnitude of 57 N. Find out the acceleration of the sled and child.
A worker pushed a 27 kg block9.2m along a level floor at constant speed with a force directed27°below the horizontal. If the coefficient of kinetic friction is 0.20, how much work was done by the worker's force?
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