Two resistors of values 6.0 and 12.0 W are connected in parallel. This combination in turn is hooked in series with an 8.0-W resistor and a 24-V battery. What is the current in the 12-W resistor?
a. 1.3 A
c. 12 A
b. 4.0 A
d. 0.67 A
D
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An object is at rest on the equator. Estimate its acceleration relative to the center of the Earth in m/s²
1.less than 0.001 2.between 0.001 and 0.01 3.between 0.01 and 0.1 4.between 0.1 and 1 5.between 1 and 10 6.between 10 and 100 7.between 100 and 1,000 8.between 1,000 and 10,000 9.more than 10,000 10.Impossible to determine
Coal power plants release particulates as well as other materials
What will be an ideal response?
A 2.0-kg object moving 5.0 m/s collides with and sticks to an 8.0-kg object initially at rest. Determine the kinetic energy lost by the system as a result of this collision
a. 20 J b. 15 J c. 30 J d. 25 J e. 5.0 J
Not only does the central engine of active galaxies and quasars require a black hole, but also ________ to provide the radiative energy
A) a source of high-energy electrons for synchrotron radiation B) globular clusters for food C) a very strong magnetic field from neutron stars D) a high rate of rotation for the black hole E) an accretion disk of infalling matter