The helium core flash occurs in very high mass stars
a. True
b. False
Indicate whether the statement is true or false
False
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A 100 kg mass is blown apart into a 90.0 kg piece and a 10.0 kg piece. After the blast, the two masses are moving apart with a relative velocity of 100 m/s. The velocity of the 10.0 kg mass after the explosion is 90.0 m/s. The total kinetic energy of the two masses after the explosion is
A. 63,200 J. B. 45,000 J. C. 30,400 J. D. 23,400 J. E. 4,500 J.
Does the magnet repel or attract the falling loop?
A. It attracts the loop. B. It repels the loop. C. It does not exert any force on the loop. D. One needs more information to answer.
A spaceship is moving away from an observer at relativistic speed. Its length at rest is 100 m, but the observer measures its length as 60 m. A time interval of 84 s on the spaceship would be measured by the observer to be which of the following?
a. 50.4 s b. 30.2 s c. 134 s d. 140 s e. 84 s
Charges of 3.5 µC and ?7.6 µC are placed at two corners of an equilateral triangle with sides of 0.1 m. At the third corner, what is the electric field magnitude created by these two charges? (ke = 8.99 × 10^9 N·m2/C2)
a. 1.2E+7 N/C b. 3.0E+6 N/C c. 5.5E+6 N/C d. 5.9E+6 N/C e. 7.9E+6 N/C