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A radar device emits microwaves with a frequency of 1.86E+9 Hz. When the waves are reflected from a van moving directly away from the emitter, the beat frequency between the source wave and the reflected wave is 388 beats per second. What is the speed of the van? (Note: microwaves, like all forms of electromagnetic radiation, propagate at the speed of light c = 3.00Ã-108 m/s.)
A 860 ? resistor is connected to a variable-voltage power supply. What current flows in the resistor when the voltage is 15 V?
An airplane is flying with a velocity of 96.0m/s at an angle of 19.0(degrees) above the horizontal. How far from the dog will the suitcase land
Speedy Sue, driving at 34.0m/s, enters a one-lane tunnel. She then observes a slow-moving van 175m ahead traveling with velocity 5.40 m/s. Sue applies her brakes but can accelerate only at 2.00 m/s2 since the road is wet. Will there be a collision..
Joe is moving through space at an unknown speed. His clock runs 4 minutes per hour slower than Jane's clock, How fast is Joe moving
Orb spiders make silk with a typical diameter of 0.15 .A typical large orb spider has a mass of 0.50 . If this spider suspends itself from a single 12-cm-long strand of silk, by how much will the silk stretch?
What is the wavelength of the waves emitted by source? What is the difference in frequency between directly radiated waves and the waves reflected from a whale travelling straight toward the ship at 4.99? Suppose that the ship is at rest in the water..
Type your question hereSuppose you look through a 3.9 mm thick window comprised of a material whose refractive index is 1.58. By how many wavelengths is it delayed, if its vacuum wavelength is 600 nm
A certain lightbulb has a tungsten filament with a resistance of 18.0 when cold and 138 when hot. Find the temperature of the hot filament
A small motor draws a current of 1.75 A from a 120.0 V line. It costs $35.81 to operate the motor for 4.00 hrs at $0.0600 /kWh, What is the power output of the motor
Find out the wavelengths of the light.
Consider two inertial reference frames. while an observer in each frame measures the following quantities, which measurement made by two observers must yield the same results.
A 1kg ball released from horizontal attatched to a 2.5 m string collides ellastically with a 2 kg block at rest. what is the speed of the block after the collision.
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