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3 years ago

2. A science book is being pushed across a table. Can the book have a constant speed and a

1 answer:

4 0

Yes, it can have both cuz of the book is pushed straight it has a constant speed moving forward and if the book curves then it is changing velocity

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You own a high speed digital camera that can take a picture every 0.5 seconds. You decide to take a picture every 0.5 seconds of

Vesnalui [34]

-- There is no need to develop the pictures. They are available immediately in a digital camera.

-- There is no change in the teacher from one picture to the next.

-- The distance the watermelon falls from the teacher in each new picture is more in each picture than in the picture before it. (C)

8 0

3 years ago

A force of 30 N is exerted on an object on a frictionless surface for a distance of 6.0 meters. If the object has a mass of 10 k

tangare [24]

Answer:The velocity of the object will be 5 $\sqrt7$ m/s or 13.23m/s

Explanation:

force exerted by the object= 30N

distance displayed by the object by the action of force=6.0m

mass of object=10kg

velocity gained by the object=?

$\frac{1}{2}mv^{2}= forcexdisplacement\\\frac{1}{2}10v^{2} = 30x6\\ 5v^{2}=180\\ v^{2}= 180-5\\ v^{2} =175\\v=\sqrt{175} \\v=5\sqrt{7} or 13.23$

6 0

2 years ago

This fossil snake and this living rat both have a structure in their skull called the quadrate bone. What best explains why both

kolbaska11 [484]

The snake and rat both share the same ancestor population that had a quadrate bone, which was inherited from an ancestor population.

<h3>What is a homo-logous structure?</h3>

A homo-logous structure is a trait that may or not have the same function but has a common evolutionary origin.

A homo-logous structure can be used to trace the evolutionary relationships between species.

Conversely, an analogous structure has the same function but it does not reflect an evolutionary origin.

Learn more about homo-logous structure here:

brainly.com/question/8405772

8 0

3 years ago

A grapefruit falls from a tree and hits the ground 0.72 s later.

xxTIMURxx [149]

Answer:

<em>The grapefruit dropped 2.54 m and hit the ground at 7.06 m/s</em>

Explanation:

<u>Free Fall Motion </u>

A free-falling object falls under the sole influence of gravity. Any object that is being acted upon only by the force of gravity is said to be in a state of free fall. Free-falling objects do not encounter air resistance.

If an object is dropped from rest in a free-falling motion, it falls with a constant acceleration called the acceleration of gravity, which value is $g = 9.8 m/s^2.$

The final velocity of a free-falling object after a time t is given by:

vf=g.t

The distance traveled by a dropped object is:

$\displaystyle y=\frac{gt^2}{2}$

Given a grapefruit free falls from a tree and hits the ground t=0.72 s later, we can calculate the height it fell from:

$\displaystyle y=\frac{9.8\cdot 0.72^2}{2}$

y = 2.54 m

The final speed is computed below:

$vf=9.8\cdot 0.72$

vf = 7.06 m/s

The grapefruit dropped 2.54 m and hit the ground at 7.06 m/s

6 0

3 years ago

HEY GUYS:)<br><br>WHATS MICROSCOPE??

Murljashka [212]

A microscope is an instrument from which you can see the cells of an object.
It helps you to observe the cells of substance.
Powerful microscopes helps better in observing minute particles or bacterias.

Hope it helps...

8 0

3 years ago

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