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enot [183]
3 years ago
13

What is 2.0 ft × 4 ft, to the correct number of significant figures?

Physics
1 answer:
Alex73 [517]3 years ago
4 0
The correct number of significant figures is always the smallest number of significant figures given. So when you're talking about 2.0 and 4, 4 is the number with smallest number of significant figures, in this case 1 significant figure.

This means that 2.0 ft x 4 ft = 8 ft.
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An 8.5 kg crate is pulled 5.1 m up a 30 degree incline by a rope angled 17 degrees above the incline. The tension in the rope is
Ulleksa [173]

Answer:

1. a W_t=746.63 J

  b E_p=212.415 J

  c W_n=183.96J

2. T_e=99.71J

Explanation:

a). The work done by the tension is:

W_t=T*dt

dt=\frac{5.1}{cos(17)}

W_t=140N*\frac{5.1}{cos(17)}

W_t=746.63 J

b). The work done potential of gravity

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c). The work done by the normal force

W_n=N*d_n

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2. The increase in thermal energy is:

T_e=F*d

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T_e=99.71J

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3 years ago
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