The object left behind after the 1054 AD supernova explosion has been observed at the center of the Crab nebula. The object is a
a. white dwarf.
b. neutron star.
c. red giant.
d. protostar.
b
You might also like to view...
Which domain or domains are made up of organisms without nuclei?
a. archaea only b. bacteria only c. eukarya d. both archaea and bacteria e. both bacteria and eukarya
Specific Heat: In a flask, 114.0 g of water is heated using 67.0 W of power, with perfect efficiency. How long will it take to raise the temperature of the water from 15°C to 25°C? The specific heat of water is 4186 J/kg ? K.
A. 71 s B. 4.1 s C. 17 s D. 320,000 s
At what frequency is the reactance of a 20.0 mH inductor equal to 18.8 
A. 75.0 Hz B. 150 Hz C. 1500 Hz D. 15.0 Hz
Lenz's Law: A bar magnet is close to a solenoid, as shown in the figure. As viewed through the solenoid looking toward the magnet, what is the direction (clockwise or counterclockwise) of the current (if any) induced in the solenoid in each case?(a) The magnet is pushed toward the solenoid.(b) The magnet and solenoid both move to the right at 25 cm/s.
What will be an ideal response?