An iPod battery is rated at 3.7 volts and operates its iPod and earbuds with a direct current of 865 milliamps. What is the power rating of this iPod?
A. 234 Watts
B. 3.7 Joules per second
C. 3.2 Watts
D. 16 Watts
Answer: C
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In the figure, a block of mass M hangs at rest. The rope that is fastened to the wall is horizontal and has a tension off 52 N. The rope that is fastened to the ceiling has a tension of and makes an angle ? with the ceiling
What is the angle ?? A) 55° B) 35° C) 30° D) 63° E) 45°
When a 20-V emf is placed across two resistors in series, a current of 2.0 A is present in each of the resistors. When the same emf is placed across the same two resistors in parallel, the current through the emf is 10 A. What is the magnitude of the greater of the two resistances?
A. 7.2 ? B. 7.6 ? C. 6.9 ? D. 8.0 ? E. 2.8 ?
The Earth is about ___________ years old by ___________
a. 4 billion years old: radioactive dating b. 4 million; measuring Earth's orbital period around the Sun c. 4 billion; measuring Earth's orbital period around the Sun d. 4 million; radioactive dating
Deposition of sediment with each new layer younger than the layer below illustrates the principle of
A) original horizontality. B) superposition. C) nonconformity. D) horizontality and nonconformity.