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Llana [10]
3 years ago
14

A motorboat starting from rest on a lake accelerates in a straight line at a constant rate of 3.0 m s–2 for 8.0 s. How far does

the boat travel during this time
Physics
1 answer:
ankoles [38]3 years ago
4 0

Answer:

96m

Explanation:

Using SUVAT:

s=? u=0 a=3 t=8

s=ut+0.5*at^2

s=0.5*3*8^2

s=96m

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No.  "Shuttle" has been pretty much used to indicate shuttling
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The devices that have tooled around on the surface of Mars
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The orbital radius of the Earth (from Earth to Sun) is 1.496 x 10^11 m.
mrs_skeptik [129]

Explanation:

The orbital radius of the Earth is r_1=1.496\times 10^{11}\ m

The orbital radius of the Mercury is r_2=5.79 \times 10^{10}\ m

The orbital radius of the Pluto is r_3=5.91 \times 10^{12}\ m

We need to find the time required for light to travel from the Sun to each of the  three planets.

(a) For Sun -Earth,

Kepler's third law :

T_1^2=\dfrac{4\pi ^2}{GM}r_1^3

M is mass of sun, M=1.989\times 10^{30}\ kg

So,

T_1^2=\dfrac{4\pi ^2}{6.67\times 10^{-11}\times 1.989\times 10^{30}}\times 1.496\times 10^{11}\\\\T_1=\sqrt{\dfrac{4\pi^{2}}{6.67\times10^{-11}\times1.989\times10^{30}}\times1.496\times10^{11}}\\\\T_1=2\times 10^{-4}\ s

(b) For Sun -Mercury,

T_2^2=\dfrac{4\pi ^2}{6.67\times 10^{-11}\times 1.989\times 10^{30}}\times 5.79 \times 10^{10}\ m\\\\T_2=\sqrt{\dfrac{4\pi^{2}}{6.67\times10^{-11}\times1.989\times10^{30}}\times 5.79 \times 10^{10}}\ m\\\\T_2=1.31\times 10^{-4}\ s

(c) For Sun-Pluto,

T_3^2=\dfrac{4\pi ^2}{6.67\times 10^{-11}\times 1.989\times 10^{30}}\times 5.91 \times 10^{12}\\\\T_3=\sqrt{\dfrac{4\pi^{2}}{6.67\times10^{-11}\times1.989\times10^{30}}\times 5.91 \times 10^{12}}\\\\T_3=1.32\times 10^{-3}\ s

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Please Help <br><br> Conservation of energy
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Answer:

a principle stating that energy cannot be created or destroyed, but can be altered from one form to another.

Explanation:

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