Resistors of values R1 = 6.00 ?, R2 = 4.00 ?, R3 = 10.0 ?, and R4 = 7.00 ? are combined as shown. What is the equivalent resistance for this combination?
a.
2.30 ?
b.
3.00 ?
c.
10.7 ?
d.
27.0 ?
c
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In an RLC series circuit, if the AC frequency is increased to a very large value, what value does the phase angle between the current and voltage approach?
a. 90° b. 0° c. –90° d. 45°
An unfueled 1000-kg experimental rocket sled at rest on level frictionless rails is loaded with 50 kg of propellant. It exhausts the propellant in a 20 s "burn.". The rocket moves at 160 m/s after the burn. What average force is experienced by the rocket during the burn?
a. 0.80 × 10^4 N b. 0.75 × 10^4 N c. 0.60 × 10^4 N d. 0.35 × 10^4 N
You are given three radioactive samples (?, ?, and ?) and can only dispose of one. The other two you must keep, one in your hand, the other in your pocket. How would you minimize your exposure risk?
A) keep ? in hand, keep ? in pocket, and dispose of ? B) dispose of ?, keep ? in hand, and keep ? in pocket C) dispose of ?, keep ? in pocket and keep ? in hand D) keep ? in pocket, dispose of ?, and keep ? in hand E) keep ? in hand, dispose of ?, and keep ? in pocket
What is this object?
A) Jupiter's moon Europa B) Saturn's moon Titan C) Uranus's moon Miranda D) Neptune's moon Triton E) Jupiter's moon Callisto