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3 years ago

What happens when objects of unequal mass collide

1 answer:

7 0

According to Newton's third law of motion, They will push away from each other in proportion to their masses. (I am in 7th grade and I learned this in the first chapter in science, it was mostly about Newton's first, second, and third law. You should see the definitions of them, it will help you a lot, trust me)

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Lightning occurs when there is a flow of electric charge (principally electrons) between the ground and a thundercloud. The maxi

Korolek [52]

Answer:

2C charge will flow from ground and cloud

Explanation:

We have given rate rate of flow of charge $\frac{dq}{dt}=20000C/sec$

Time is given as $t=100\mu sec=100\times 10^{-6}=10^{-4}sec$

WE have to find the how much charge flows between the ground and cloud in this time

So the charge flow is given by $\frac{dq}{dt}\times t=20000C/sec\times 10^{-4}=2C$

So 2C charge will flow from ground and cloud

8 0

3 years ago

Plants may get yellow if they get less nitrogen.give reasons.

Vaselesa [24]

Explanation:

Nutrient deficiency causes yellowing of leaves. One of such nutrient is Nitrogen.

Leaves are green because of a pigment in them called chlorophyll.
The chlorophyll in leaves are used by plant to absorb light energy needed for photosynthesis.
Other wavelength of light is absorbed by the chlorophyll and the green color is reflected.
Nitrogen is an important nutrient that is needed to produce chlorophyll in plants which in turn helps the process of photosynthesis.

Learn more;

Photosynthesis brainly.com/question/2761166

#learnwithBrainly

5 0

4 years ago

How do you find displacement when all you have is time with no velocity, and then in order to find velocity you have to have dis

saw5 [17]

If you really have nothing else but time, then you can't. There must be some other shred of information. Search around. Look under rocks.

3 0

4 years ago

A farsighted girl has a near point at 2.0 m but has forgotten her glasses at home. The girl borrows eyeglasses that have a power

lisov135 [29]

Find the pictures in the attachment

6 0

3 years ago

You push your couch a distance of 3.9 m across the living room floor with a horizontal force of 220.0 n. the force of friction i

Mrac [35]

The general formula to calculate the work is:

$W=Fd \cos \theta$

where F is the force, d is the displacement of the couch, and $\theta$ is the angle between the direction of the force and the displacement. Let's apply this formula to the different parts of the problem.

(a) Work done by you: in this case, the force applied is parallel to the displacement of the couch, so $\theta=0^{\circ}$ and $\cos \theta=1$ , therefore the work is just equal to the product between the horizontal force you apply to push the couch and the distance the couch has been moved:

$W=Fd=(220.0 N)(3.9 m)=858 J$

(b) work done by the frictional force: the frictional force has opposite direction to the displacement, therefore $\theta=180^{\circ}$ and $\cos \theta=-1$ . Therefore, we must include a negative sign when we calculate the work done by the frictional force:

$W=-Fd=-(144.0 N)(3.9 m)=-561.6 J$

(c) The work done by gravity is zero. In fact, gravity (which points downwards) is perpendicular to the displacement of the couch (which is horizontal), therefore $\theta=90^{\circ}$ and $\cos \theta=0$ : this means

$W=0$ .

(d) Work done by the net force:

The net force is the difference between the horizontal force applied by you and the frictional force:

$F=220 N-144 N=76 N$

And the net force is in the same direction of the displacement, so $\theta=0^{\circ}$ and $\cos \theta=1$ and the work done is

$W=Fd=(76 N)(3.9 m)=296.4 J$

4 0

4 years ago