A champion athlete can produce one horsepower (746 W) for a short period of time. If a 70-kg athlete were to bicycle to the summit of a 500-m high mountain while expending power at this rate, she would have used at least ____ J of energy
a.
746
b.
3.43 × 105
c.
3.73 × 105
d.
7.46 × 105
e.
2.61 × 107
b
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You stand near the Earth's equator. A positively charged particle that starts moving parallel to the surface of the Earth in a straight line directed east is initially deflected upwards. If you know there are no electric fields in the vicinity, a possible reason why the particle does not initially acquire a downward component of velocity is because near the equator the magnetic field lines of the
Earth are directed a. upward. b. downward. c. from south to north. d. from north to south. e. from east to west.
At the time of a solar eclipse, the Moon is in ______________ phase
Fill in the blank(s) with correct word
The surface tension of water is 0.0730 N/m. What is the height of the water in a capillary tube of diameter 1.00 mm?
A. 3.02 cm B. 2.98 cm C. 2.75 cm D. 2.55 cm E. 2.40 cm
How much energy is released when 0.60 ?g of 3H have decayed to 3He? The mass of 3He is 3.0160293 u, the mass of 3H is 3.0160492 u, 1 u = 931.5 MeV/c2, 1 eV = 1.60 × 10-19 J, and NA = 6.022 × 1023 molecules/mol
What will be an ideal response?