3 years ago

A 30 kg TV falls out of a 5 meter high window, reaching a

Physics

2 answers:

butalik [34]3 years ago

8 0

Answer:

300kgm/s

Explanation:

Given parameters:

Mass of TV = 30kg

Height of building = 5m

Maximum speed = 10m/s

Unknown:

Momentum before it hits the ground = ?

Solution:

Momentum is the quantity of motion a body possess or contains. It is expressed as;

Momentum = mass x velocity

Insert the parameters and solve;

Momentum = 30 x 10

Momentum = 300kgm/s

luda_lava [24]3 years ago

8 0

Hi sorry for yesterday

Explanation:

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Answer:

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3 years ago

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2 years ago

A car changes speed from 25 m/s to 10 m/s in 240 seconds. Describe its acceleration.

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Explanation:

Acceleration is change in velocity over change in time:

a = Δv / Δt

a = (10 m/s - 25 m/s) / (240 s - 0 s)

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3 years ago

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Explanation:

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3 years ago

The ratio of carbon-14 to nitrogen-14 is an artifact is 1:3. Given that half-life of carbon-14 is 5730years, how old is the arti

dusya [7]

Answer:

9155 years old

Explanation:

We use the following expression for the decay of a substance:

$N = N_0\,\,e^{-k*t}$

So we first estimate the value of k knowing that the half-life of the C14 is 5730 years:

$N = N_0\,\,e^{-k*t}\\N_0/2=N_0\,\,e^{-k*5730}\\1/2 = e^{-k*5730}\\ln(1/2)=-k*5730\\k= 0.00012$

so, now we can estimate the age of the artifact by solving for"t" in the equation:

$1/3=e^{-0.00012*t}\\ln(1/3)= -0.00012*t\\t=9155. 102$

which we can round to 9155 years old.

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3 years ago