The power expended for a barbell raised 2.0 m in 2 s is
A) 1 W.
B) 4 W.
C) 8 W.
D) not enough information
Answer: D
You might also like to view...
The rms Electric field strength at a distance r from a 25 W light source is found to be 4.33 N/C. What is the distance r?
A. 22 m B. 6.3 m C. 30 m D. 40 m
What is the MOST important role that carbohydrates play in living organisms on Earth?
A) long-term energy storage and cell structure B) information storage C) basic functioning of living organisms D) short-term energy storage
A Van de Graaff generator has a spherical dome of radius 50.0 cm. Operating in dry air, where "atmospheric breakdown" is at Emax = 3.0 × 10^6 N/C, what is the maximum charge that can be held on the dome? (ke = 8.99 × 10^9 N/m2/C2)
a. 1.7E–4 C b. 8.3E–5 C c. 4.2E–6 C d. 8.3E–5 C e. 1.7E–6 C
If a charge generator builds a negative static charge of - how many electrons are transferred to it during this process. (e = 1.60 × 10-19 C)
A) 4.38 × 1013 B) 7.0 C) 1.12 × 10-18 D) 43.8