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- Electromagnetic waves (EM) are produced by A. A neutron accelerating from 50m/s to 90m/s B. An electron at rest. C. A proton at rest. D. An electron accelerating from 50m/s to 90m/s.Part C: Short Answer- Communications 32. Describe a situation where an object is accelerating but its velocity is zero.(2) 33. In designing new aerospace launch shuttles. For the same initial upward velocities, how many times higher will a shuttle travel above the moon surface (g = 1.6 m/s² [down]) than above the surface of Earth? Assume negligible air resistance on Earth.(2) 34. High frequency, very short wavelength Gamma Rays are used to treat some types of cancer. Describe how this is possible. (3) 35. Providing examples of each, differentiate between inertial and noninertial frames of reference.(2) 36. Describe a modern technology that involves the knowledge and usage of electrical and magnetic fields?(3) 37. Looking out a train window, you see a train on the adjacent track. Explain why you think it might be the other train moving when it is really your train that has started to move.(2) 6 of 13You are in the Enterprise traveling at half the speed of light (v = 0.5c), heading toward a Borg spaceship. You fire your phasers and you see the light waves leaving your ship at the speed of light c = 3x108 m/s toward the Borg. With what speed do the Borg see the phaser blasts approaching their ship? a) less than .5c b) 0.5c c) c d) 1.5c e) more than 2c
- 3. Alice is moving with 0.8c towards a mirror. She sends a light pulse towards the mirror when she is at a distance L from the mirror. Bob is at rest with respect to the mirror and is observing this experiment. After how long will Alice receive the reflected pulse, as measured by Alice and Bob?A muon is created at an accelerator experiment. It moves with a spe0.95c. The muon mass is1.90×10−28 kg. What is its momentum? A.1.20×10−19 kg m/s B.1.73×10−19 kg m/s C.2.88×10−19 kg m/s D.3.59×10−19 kg m/s ( Please type answer note write by hend )2. Two astronauts are 1.20 m apart in their spaceship. One speaks to the other. The conversation is transmitted to earth via electromagnetic waves. The time it takes for sound waves to travel at 346 m/s through the air between the astronauts equals the time it takes for the electromagnetic waves to travel to the earth. How far away from the earth is the spaceship? m.
- A. 10x 10" B. 1.4x10" C. 2.7×10J D. 6.8x10"J 8. How much kinetic energy does an electron (m = 9.1x10 kg) have if it is traveling at one-half the speed of light?An object moves in a direction parallel to its length with a velocity that approaches the velocity of light. The length of this object, as measured by a stationary observer, A) approaches infinity. B) approaches zero. C) increases slightly. D) decreases slightly. E) does not change.You are moving at a speed 2/3 c toward Randy when shines a light toward you. At what speed do you see the light approaching you? a 1/3 c b 2/3 c c 4/3 c d c
- . A) How fast would a motorist have to travel for a yellow traffic light (λ = 590. nm) to appear green (λ =500. nm) to him due to the Doppler shift? B) Would the motorist be traveling towards or away from the traffic light?George is in a spaceship, speeding away from planet Earth at , where is the speed of light in a vacuum. Anna is on George's ground crew, and she sends out a communication signal to George. Since Anna's communication signal is a radio wave, it is electromagnetic and travels at a speed of relative to Anna. From George's perspective, Anna's signal is approaching him at a speed of? c 0.5c 2c 0A UFO travels at such a speed as to remain above one point on the earth ata height of 200 km above the earth's surface. A radio signal of frequency 110:0 MHz is sent to the UFO. i.What is the shift in the frequency received by the UFO? ii. If the signal was reflected back to earth, what would be the observed frequency of the return signal?