The jets emitted by compact objects are made of _____
a. X-rays
b. atomic nuclei
c. neutrons
d. neutrinos
e. positrons
b
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A 50 kg ice skater moving at 6 m/s collides with a second stationary skater with mass 70 kg. The skaters cling together after the collision and move without friction. Compute their speed after the collision
In the figure, a stunt car driver negotiates the frictionless track shown in such a way that the car is barely in contact with the track at the top of the loop
The radius of the track is 9.9 m and the mass of the car is 1800 kg. Find the magnitude of the force of the car on the track when the car is at point A. You can treat the car as a point mass. What will be an ideal response?
Will our Sun contribute heavy elements to the cosmos at the end of its life?
A) Yes, all stars do. B) No, only high mass stars make heavy elements, and our Sun is a low mass star. C) It is possible, but there is no way for us to know. D) Yes, but only because it is a low mass star and has plenty of time to produce those heavy elements.
To transmit four times as much energy per unit time along a string, you can
a. double the frequency. b. double the amplitude. c. increase the tension by a factor of 16. d. do any one of the above. e. do only (a) or (b) above.