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agasfer [191]
3 years ago
14

Renewable energy has no disadvantages. True or False

Physics
2 answers:
Ivahew [28]3 years ago
8 0

Answer:

TRUE:

Explanation:

they are normally more expensive to set up/ build or buy.

levacccp [35]3 years ago
3 0

Answer:  False, having renewable energy gives you the able to keep using it rather than a nonrenewable.

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A bucket that has a mass of 20 kg when filled with sand needs to be lifted to the top of a 15 meter tall building. You have a ro
prohojiy [21]

Answer:

work done lifting the bucket (sand and rope) to the top of the building,

W=67.46 Nm

Explanation:

in this question we have given

mass of bucket=20kg

mass of rope=.2\frac{kg}{m}

height of building= 15 meter

We have to find the work done lifting the bucket (sand and rope) to the building =work done in lifting the rope + work done in lifting the sand

work done in lifting the rope is given as,W_{1}=Force \times displacement

=\int\limits^{15}_0 {.2x} \, dx ..............(1)

=.1\times 15^2

=22.5 Nm

work done in lifting the sand is given as,W_{2}=Force \times displacement

W_{2}=\int\limits^{15}_0 F \, dx.................(2)

Here,

F=mx+c

here,

c=20-18

c=2

m=\frac{20-18}{15-0}

m=.133

Therefore,

F=.133x+2

Put value of F in equation 2

W_{2}=\int\limits^{15}_0 (.133x+2) \, dx

W_{2}=.133 \times 112.5+2\times15\\W_{2}=14.96+30\\W_{2}=44.96 Nm

Therefore,

work done lifting the bucket (sand and rope) to the top of the building,W=W_{1}+W_{2}

W=22.5 Nm+44.96 Nm

W=67.46 Nm

4 0
3 years ago
Five hundred joules of heat are added to a closed system. The initial internal energy of the system is 87 J, and the final inter
mina [271]
The answer is D. i got all the other ones wrong ._.

8 0
3 years ago
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Some steamboat restaurants use paper pots for their customers to boil the food themselves. What is the reason for the paper not
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An object is going 22 m/s and is 3 kg. find momentum
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So what you wanna do is take your two givens. 22 and 3. Now you wanna take 22 and divide that by 3. And that gives you 7.33. Now if your answer HAS to be a whole number it'll be 66.
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3 years ago
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A scientist plans to find out the percent of teenagers who like science. She interviews 500 teenagers leaving a science museum a
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