3 years ago

. What is the kinetic energy of a 10 kg car that is moving 4 m/s?

Physics

1 answer:

Darya [45]3 years ago

8 0

Answer:i belive the answer is E = 1/2 mv^2

hope this helps plz mark me as braliest

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What is the wavelength of a wave that has a speed of 350 meters/second and a frequency of 140 hertz?In meters

Leto [7]

Apply:
wavelength = speed/frequency
= 350 m/s : 140 Hz = 2.5 m.

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3 years ago

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Ashley swam 20 miles in .5 hours and 40 miles in an hour is it a proportional?

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Yes it proportional.

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What is the net force acting on Hector and the toboggan?

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Answer:

C.490N

Explanation:

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A golf ball with m = 46 g is struck a blow which makes an angle of 45o with the horizontal. The drive lands 200 m away on a flat

AfilCa [17]

Answer:

Average force will be equal to 2908.57 N

Explanation:

We have given mass of the ball m = 46 gram = 0.046 kg

Let velocity at which ball is projected is u m/sec

Angle at which ball is projected $\Theta =45^{\circ}$

Range of the ball is given R = 200 m

Range is equal to $R=\frac{u^2sin2\Theta }{g}$

$200=\frac{u^2sin(90^{\circ})}{9.8}$

$u^2=1960$

u = 44.27 m/sec

Change in momentum of the ball is equal to $P=mu=0.46\times 44.27=20.36kgm/sec$

Time of impact is given $dt=7ms=0.007sec$

Force is equal to rate of change of momentum

So force $F=\frac{dP}{dt}=\frac{20.36}{0.007}=2908.57N$

Force will be equal to 2908.57 N

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3 years ago

Check out the list of scientific names. These names all represent animals. These are all annals but they cannot reproduce fertil

Black_prince [1.1K]

Answer:

None of the animals are from the same species

Explanation:

The exact question is as follows :

Given -

Felis catus

Sylvilagus audubonii

Parus inornatus

Euarctos americanus

Check out the list of scientific names. These names all represent animals. These are all animals but they cannot reproduce to produce fertile offspring with each other.

To find - What conclusion can be drawn from the past statement?

Solution -

The conclusion we can made from past statement is that - None of the animals are from the same species

Reason -

When two members of the same species reproduce, they produce fertile offspring.

According to the scientific names of the animals, there are different genus and species names.

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3 years ago