2 years ago

The graph depicts the velocity and times of Elan and Anna during a race.

Physics

2 answers:

Ratling [72]2 years ago

8 0

Answer:

Explanation:

vovangra [49]2 years ago

3 0

Answer: C

Explanation:

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28. The mass of a steel building frame is 5500 kg. What power is used to raise it to a helght of 5.0 m If the work is done in 12

vodka [1.7K]

Answer:

2292W

Explanation:

Use the formula for energy first:

$E=D*M$

Where E = Energy || D = Distance || M = Mass.

Solve that equation:

E = 5 * 5500 ==> 27500J

To find power, divide energy per time:

27500J / 12s =~ 2292W

Did it in a rush, any problems message me

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3 years ago

"the bank stood like a gray fortress at the corner of Yulee and St. Johns" is

GaryK [48]

Answer:personification

Explanation:

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3 years ago

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What are the properties of heat

alex41 [277]

1. Heat capacity.
2. Thermal Expansion.
3. Thermal conductivity

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3 years ago

a car starts from rest and accelerates to a speed of 30 m/s in a time of 3 seconds. the average acceleration of the car is

MAXImum [283]

Answer:

10m/s²

Explanation:

v=u+at

30=0+a(3)

∴a=10m/s²

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3 years ago

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Suppose that the Millennium Falcon orbits the Death Star 20,000m above the Star’s surface. Calculate the circular orbit velocity

Nataly [62]

Answer:

18.4 m/s

Explanation:

The gravitational force between the Death Star and the Millenium Falcon is equal to the centripetal force that keeps the Millenium Falcon in circular orbit:

$G\frac{Mm}{(R+h)^2}=m\frac{v^2}{R+h}$

where

$G=6.67\cdot 10^{-11} m^3 kg^{-1} s^{-2}$ is the gravitational constant

$M=5.1\cdot 10^{17} kg$ is the mass of the planet

$m=1.36\cdot 10^6 kg$ is the mass of the Millennium Falcon

$v$ is the orbital velocity of the Millennium Falcon

$R=\frac{160,000 m}{2}=80,000 m$ is the radius of the Death Star

$h=20,000 m$ is the altitude of the Millennium Falcon above the planet's surface

Solving the equation for v, we find the orbital velocity:

$v=\sqrt{\frac{GM}{R+h}}=\sqrt{\frac{(6.67\cdot 10^{-11})(5.1\cdot 10^{17} kg)}{80,000 m+20,000 m}}=18.4 m/s$

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3 years ago