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MArishka [77]
3 years ago
11

If a car accelerates at a constant rate of 3m/s^2, what is the velocity of the car after 4 seconds

Physics
2 answers:
vaieri [72.5K]3 years ago
6 0

It'll be 12 m/s greater than it was when the acceleration began.

Ne4ueva [31]3 years ago
3 0

V=d/t

V=3/4

V=0.75

Hope this helps and is correct :)

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For a converging lens, a ray arriving parallel to the optic axis
mixer [17]

Answer:

b. passes through the principal focal point.

Explanation:

Light wave can be defined as an electromagnetic wave that do not require a medium of propagation for it to travel through a vacuum of space where no particles exist.

A lens can be defined as a transparent optical instrument that refracts rays of light to produce a real image.

Basically, there are two (2) main types of lens and these includes;

I. Diverging (concave) lens.

II. Converging (convex) lens.

A converging lens refers to a type of lens that typically causes parallel rays of light with respect to its principal axis to come to a focus (converge) and form a real image. This type of lens is usually thin at the lower and upper edges and thick across the middle.

For a converging lens, a ray arriving parallel to the optic axis passes through the principal focal point.

8 0
3 years ago
A toy train engine rests motionless on a track. One student begins pushing the engine to the right with a force of 2 newtons. At
Svetradugi [14.3K]
I think it’s B

Hope it helps
8 0
3 years ago
When white light passes through a prism, a red light is least changed in direction? True or false
Goryan [66]

True because the picture below proves this....

* from which red color is least deviated and violet most.

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<em>∞ 234483279c20∞</em>

4 0
3 years ago
Do someone know the answer
JulijaS [17]
Speed x time = distance
Distance divided by time = speed
500 divided by 5
Speed = 100
4 0
3 years ago
A river 1.00 mile wide flows with a constant speed of 1.00 mph. A man can row a boat at 2.00 mph. He crosses the river in a dire
gladu [14]

To solve this problem we will apply the geometric concepts of displacement according to the description given. Taking into account that there is an initial displacement towards the North and then towards the west, therefore the speed would be:

V_T^2=v_N^2-v_W^2

V_T = \sqrt{v_N^2-v_W^2}

Travel north 2mph and west to 1mph, then,

V_T = \sqrt{2^2-1^2}

V_T = \sqrt{3}

The route is done exactly the same to the south and east, so make this route twice, from the definition of speed we have to

v= \frac{\Delta x}{t}

t = \frac{\Delta x}{v}

t = \frac{2*(1mile)}{\sqrt{3}mph}

t = 1.15hour

Therefore the total travel time for the man is 1.15hour.

3 0
3 years ago
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