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fenix001 [56]
2 years ago
10

PLEASE HELP WITH SOME PHYSIC QUESTIONS!!! Will upvote!!

Physics
1 answer:
Genrish500 [490]2 years ago
6 0
Hello there.
<span>
A microwave is rated at 750 watts. How long will it take the microwave to do 5700 J of work on a cup of water? Assume 100% efficiency. 

</span><span>7.6s </span>
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You have landed on an unknown planet, Newtonia, and want to know what objects will weigh there. You find that when a certain too
IceJOKER [234]

Explanation:

The given data is as follows.

    v_{o} = 0,     x_{o} = 0,      t_{o} = 0

    x_{1} = 17.0 m,      t_{1} = 2.10 sec

As the force P is constant and the mass "m" of the tool is constant then it means that the acceleration "a" will also be constant.

Now,

      x_{1} = x_{o} v_{o}t_{1} + \frac{1}{2}at^{2}_{1}

                 = 0 + (0)(2.10 s) + \frac{1}{2}a(2.10)^{2}

               17.0 = 2.205a

               a = 7.71 m/s^{2}

Also, we know that

                       F = \frac{m}{a}

                   m = \frac{F}{a}

So,              m = \frac{12.8 N}{7.71 m/s^{2}}

                       = 1.66 kg

Since, the tool is subject to its weight W and is in free fall. Hence,

       x_{1} = x_{o} + v_{o}t_{1} + \frac{1}{2}gt^{2}_{1}

     10.0 m = 0 + (0)(2.88 s) + \frac{1}{2} \times g \times (2.88s)^{2}        

           g = 2.411 m/s^{2}

Hence, weight of tool in Newtonia is as follows.

                   W = mg

                       = 1.66 kg \times 2.411 m/s^{2}

                       = 4.00 N

Hence, weight of the tool on Newtonia is 4.00 N.

And, weight of the tool on the Earth is as follows.

                  W = 2.411 \times 9.80

                      = 23.62 N

Hence, weight of the tool on Earth is 23.62 N.

8 0
3 years ago
A polar bear starts at his den. It travels 1.0 km south, then 1.0 km east, then 1.0 km north,
Blizzard [7]

Answer: A . 0km/jr

Explanation:

5 0
2 years ago
An infinite line of charge with linear density λ1 = -6.6μC/m is positioned along the axis of a thick conducting shell of inner r
tester [92]

Answer:

1210 N/m between the inner and outer edges (repulsive)

252.59 N/m between inner and line charges (attractive)

1210+252.59=1462.59 N/m effective force/metre on the inner edge

Explanation:

f=k*Qq/r^2 was applied, the charges are concentrated at the edges of a ring both inner and the outer were shape edges with uniform charge densities 6.6 micro C/m of distance 4.5-2.7=1.8 cm

7 0
3 years ago
Can some please help me ? Thank you!
oksano4ka [1.4K]

Answer:

Hey ! I think I can help with this question.

In the diagram you were given the speed which is 5.25m/s and you were also given distance which is 950metres.

So the formula which will be suitable in my own way will be speed=distance/time....Since you weren't given the time,then you can place the numbers in their respectively places which will be 5.25=950/time....Then you will cross multiply which will be 5.25t=950....Then 950÷5.25=180.952381 which is approximately 181. then don't forget to add your unit, time is measured in seconds so the answer is going to be 181seconds.This is what I know...I hope this helps you.....Thank you for the question

4 0
2 years ago
the electrical energy used to pump the water up to a mountain lake is 1.2 x 10 to the power 12 J only 6.2 x 10 to the power 11 J
Andreyy89

Answer:

Explanation:

ake is 1.2 x 10^12 J. Only 6.2 x 10^11 J of electrical energy is generated when the water is released. Calculate the efficiency of this energy

4 0
2 years ago
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