An ac series circuit consists of a voltage source of frequency 60 Hz and voltage amplitude V, a 533-? resistor, and a capacitor of capacitance 6.4 µF
What must be the source voltage amplitude V for the average electrical power consumed in the resistor to be 989 W? There is no inductance in the circuit.
1300 V
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A proton is projected with a velocity of 7.0 × 103 m/s into a magnetic field of 0.60 T perpendicular to the motion of the proton. What is the force that acts on the proton?
A) 0 N B) 3.4 × 10-16 N C) 4.2 × 10-16 N D) 13 × 10-16 N E) 6.7 × 10-16 N
The Local Group of galaxies is dominated by the presence of spiral galaxies
Indicate whether the statement is true or false
Uranus' large axial tilt is thought to be the result of:
A) the same orbital irregularities that led to the discovery of Neptune. B) a single collision or impact event early in the solar system's history. C) the captures of one or more of Uranus' moons. D) giant planet migration. E) multiple catastrophic events, such as glancing collisions.
A runaway railroad car, with mass 45.0 × 10^4 kg, coasts across a level track at 3.80 m/s when it collides with a spring-loaded bumper at the end of the track. If the spring constant of the bumper is 3.80 × 10^6 N/m, what is the maximum compression of the spring during the collision? (Assume the collision is elastic.)
a. 1.31 m b. 1.85 m c. 0.925 m d. 2.10 m e. 2.62 m