EMW (Electromagnetic waves) are produced by   A. A neutron moves with a velocity of 200 m/s   B. A proton speeds up from 50m/s to 75m/s   C. Stationary electrons   D. An electron moves with a contant speed of 35m/s in a straight line.

QUESTION 12 You are in a car that is traveling at 40 mph. A car traveling at 50 mph passes you. How fast does that car, that passes you, appear to move? a. 50 mph b. 20 mph c. 10 mph d. 40 mph QUESTION 13 You are on a train platform and a train, traveling at 10 mph, passes by you moving to the right. A person on that train is moving at -5 mph as they walk to the left through the train. How fast does the person, walking on the train, appear to be moving to you? a. 5 mph to the left b.0 mph to the left c. 10 mph to the left d. 5 mph to the right QUESTION 14 Which acceleration below would you feel the most? a. 20 m/s^2 b. 10 m/s^2 c. 15 m/s^2 d. 5 m/s^2 Click Save and Submit to save and submit. Click Save All Answers to save all answers. Sa MacBook Pro esc

The car is moving at 10 m/s relative to Bill. How fast does Amy see the car as moving?A. 5 m/s         B. 10 m/sC. 15 m/s       D. 20 m/s

Race rocket driver Suzy is heading down the final straightaway, approaching the finish line at 1.0 x 108 m/s. Her fans, at the finish line straight ahead, are shooting laser beams toward her (but not into her eyes). The speed of light is 3.0 x 108 m/s. How fast are the light waves approaching in Suzy's reference frame? 3. a) Light waves do not travel in Suzy's frame. b) 1.0 x 10² m/s c) 3.0 x 108 m/s d) 4.0 x 10² m/s

Tom is moving at 19.1 m/s i-hat relative to Ann. Bob is moving at 17.1 m/s i-hat relative to Ann. Bob is moving at 27.6 m/s i-hat relative to Sue. What is the velocity of Bob relative to Tom?

You 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

Shannon observes two light pulses to be emitted from the same location, but separated in time by 1.5μs. Kimmie observes the emission of the same two pulses to be separated in time by 2.5μs. a. How fast is Kimmie moving relative to Shannon? b. According to Kimmie. what is the separation in space of the two pulses?

Which of the following will emit an EM WAVE? Choose all that apply. A positive ion that is speeding up from 2800 m/s to 3000 m/s. A proton moving at a constant velocity of 50 mph due north. A neutron that is slowing down from 400 km/h to 350 km/h. A negative ion moving in a circle while traveling at a constant speed of 40 in/min. An electron that is stationary.

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?

A certain X-ray machine generates X-rays from a beam of electrons accelerated from zero to 99.9999999 per cent the speed of light in a long linear accelerator of length 3.2 km. The electrons are generated in pulses of duration ∆t = 100 fs. The generated x-rays from the target are also short pulses (λ = 0.15 nm). What is the average power of the x-ray beam if it pulses 120 times per second and one x-ray pulse contains about a trillion photons (n = 1012). a) 16.0 W b) 1.6 W c) 0.16 W              d) none of these.