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horrorfan [7]
2 years ago
8

4. A weightlifter lifts a set of weights a vertical distance of 2 meters. If a constant net force of 350 N is exerted on the wei

ghts, what is the net work done on the weights?
Physics
1 answer:
Ivanshal [37]2 years ago
3 0

Answer:

700 J

Explanation:

Work = Force * Distance

Work = 350 N * 2 M = 700 J

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A wave emitted from a source has a frequency of 10 Hz and wavelength 2.5 m. How much time will it take to reach a person located
const2013 [10]

Answer:

time taken by the wave to reach the person is 0.2 s

Explanation:

As we know that the speed of the wave is given as

v = \lambda f

here we know that the wavelength of the wave is

\lambda = 2.5 m

f = 10 Hz

now speed of the wave is given as

v = 10(2.5)

v = 25 m/s

Now time taken by the wave to reach 5 m distance is

t = \frac{L}{v}

t = \frac{5}{25}

t = 0.2 s

4 0
3 years ago
Given that on Earth, gravity causes an acceleration of 9.8 m/s2, what is an acceleration of 7 g?
zzz [600]

Answer:

68.6 m/s^2

Explanation:

1 g = 9.8 m/s^2

so

7 g × 9.8m/s^2 = 68.6

7 0
2 years ago
The brakes on a bicycle apply 95 N of force to the wheels. When the
Veronika [31]

Answer:

idk

Explanation:

idk

6 0
3 years ago
A cylinder containing the air comprises the systemm. Cycle is completed as follows : (i) 82000 N-m of work is done by the piston
Stella [2.4K]

Answer & Explanation:

1 N-m = 1 Joule

So 82 kJ of energy put into the system during (i).

45 kJ of heat leaves the system, so 82 kJ - 45 kJ  = 37 kJ is remaining.

(ii) requires 100 kJ of energy but only 37 kJ is available, so 100 kJ - 37 kJ = 63 kJ of heat energy must be added to the system.

4 0
3 years ago
An 8-bit ADC has a digital resolution of %.
Mekhanik [1.2K]

Answer:

0.39 %

Explanation:

We have given 8 bit ADC and we have to find the resolution of the ADC

The resolution of the ADC is given by resolution=\frac{1}{2^n-1} where n is the number of bit

Here in question we have given 8 bit ADC so n = 8

So resolution is given by resolution=\frac{1}{2^n-1}=\frac{1}{2^8-1}=\frac{1}{255}=0.003921 =0.39%

5 0
3 years ago
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