Assuming that 20% of this goes into useful work and the other 80% is converted to heat, estimate the temperature rise of the bod
1 answer:
The temperature rise of the body after 30 min is 1.0 °C.
<u>Explanation</u>:
The heat capacity of water is equal to one and it is the number of calories needed to raise the temperature of one gram by 1 degree celsius.
Cp = 1 cal/ g°C
(0.80)170 kcal/hr (1000 cal/kcal)
(30 min) / 60 min/hr = 68000 cal.
68000 cal / 1 cal/ g°C / (70 kg (1000 g / kg)) = 1.0 °C.
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Approximately (given that the magnitude of this charge is
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Explanation:
If a charge of magnitude is placed in an electric field of magnitude
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The magnitude of this charge is . Apply the unit conversion
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An electric field of magnitude would exert on this charge a force with a magnitude of:
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Note that the electric charge in this question is negative. Hence, electrostatic force on this charge would be opposite in direction to the the electric field. Since the electric field points due south, the electrostatic force on this charge would point due north.