The electric field established by a battery in a dc circuit
A) increases via the inverse-square law.
B) changes magnitude and direction with time.
C) acts in one direction.
D) is non-existent.
E) none of the above
Answer: C
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A cantilever wood pole carries force P 5 300 N applied at its free end, as well as its own weight (weight density 5 6 kN/m3). The length of the pole is L 5 0.75 m and the allowable bending stress is 14 MPa. The required diameter of the pole is approximately:
(A) 4.2 cm
(B) 5.5 cm
(C) 6.1 cm
(D) 8.5 cm
The most massive main-sequence stars are the M stars
a. True b. False Indicate whether the statement is true or false
A satellite orbits the Earth once every 6.0 hours in a circle. What are the magnitude and direction of the acceleration of the satellite? (G = 6.67 × 10-11 N ? m2/kg2, Mearth = 5.97 × 1024 kg)
What will be an ideal response?
The Earth is 1.49 × 10^11 m from the Sun. If the solar radiation at the top of the Earth's atmosphere is 1340 W/m2, what is the total power output of the Sun?
a. 2.34 × 10^30 W c. 6.62 × 10^26 W b. 3.74 × 10^26 W d. 7.48 × 10^27 W