3 years ago

Which of the following supports the theory of continental drift?

1 answer:

4 0

Rocks and Continental shapes because if you put the continents together they will be very close to match and if you find a fossil (like south america) and a fossil in africa they will be the same animals . <span />

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A weight lifter does 700J of work on a weight that he lifts in 3.1s. What is the power with

IgorLugansk [536]

Power = Work done/Time taken

So, keeping this in mind,we can solve it as follows:

= 700/3.1

= 7000/31

= 225.80 W

8 0

2 years ago

Which one of Newton's Laws fits this statement:

BabaBlast [244]

Answer:

First Law

Explanation:

I learned this in 6th grade

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3 years ago

A dog, with a mass of 10.0 kg, is standing on a flatboat so that he is 22.5 m from the shore. He walks 7.8 m on the boat toward

marissa [1.9K]

Answer:16.096

Explanation:

Given

mass of dog $\left ( m_d\right )=10kg$

mass of boat $\left ( m_b\right )=46kg$

distance moved by dog relative to ground= $x_d$

distance moved by boat relative to ground= $x_b$

Distance moved by dog relative to boat=7.8m

There no net force on the system therefore centre of mass of system remains at its position

0= $m_d\times x_d+m_b\dot x_b$

0= $10\times x_d+46\dot x_b$

$x_d=-4.6x_b$

i.e. boat will move opposite to the direction of dog

Now

$|x_d|+|x_b|=7.8$

substituting $x_d$ value

$5.6|x_b|=7.8$

$|x_b|=1.392m$

$|x_d|=6.4032m$

now the dog is 22.5-6.403=16.096m from shore

4 0

3 years ago

If 03.4 kg of water at 69°C is changed into steam at 100°C, how will the energy be used? specific heat capacity of water is 4200

spin [16.1K]

Answer:

The answer is B.

Explanation:

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3 years ago

A type of wave is mechanical - what's the other type?

ANEK [815]

Answer:

There are three types of mechanical waves: transverse waves, longitudinal waves, and surface waves. :/

Explanation:

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3 years ago