Physics, 05.10.2019 11:50, dbhuggybearow6jng
2. if you exert a force of 10.0 n to lift a box a distance of 0.9 m, how much work have you done?
0.1 j
9.0 j
10.9 j
90.0 j
3. the power of a machine measures
its rate of doing work.
its strength.
the force it produces.
the work it does.
4. if you exert a force of 700 n to walk 6 m up a flight of stairs in 6 s, how much power do you use?
19 w
25,200 w
700 w
4,200 w
5. a 750-w motor might also be rated as a
0.5-horsepower motor.
1-horsepower motor.
2-horsepower motor.
10-horsepower motor.
Answers: 2
Physics, 22.06.2019 04:40, joneil1952
Argon is adiabatically compressed from an initial volume of 16 liters to a final volume of 2 liters. by what factor do the following quantities change? do they increase or decrease? (a) the rms speed (b) the thermal energy of the gas (c) the molar specific heat cv (d) the pressure
Answers: 3
Physics, 22.06.2019 16:40, jcblake
Beryl states that insulation with the smallest possible thermal conductivity is best to keep a house warm in winter, but worst for keeping a house cool in summer. sapphire insists the reverse is true: low thermal conductivity is good in the summer, but bad in the winter. which one, if either is correct? a. beryl, because low thermal conductivity results in low heat transfer. b. beryl, because low thermal conductivity results in high heat transfer. d. sapphire, because low thermal conductivity results in high heat transfer. e. neither, because low heat transfer is desirable both in summer and in winter.
Answers: 2
2. if you exert a force of 10.0 n to lift a box a distance of 0.9 m, how much work have you done? <...
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