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3 years ago

HELP ME ASAP PLS, ( zoom in on the picture )

Physics

1 answer:

il63 [147K]3 years ago

6 0

Answer:

the direction of the velocity is downward and the acceleration decreases throughout the motion

Explanation:

since the gradient is negative it is decelerating

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The star Rho1 Cancri is 57 light-years from the earth and has a mass 0.85 times that of our sun. A planet has been detected in a

s344n2d4d5 [400]

Answer:

82780.42123 m/s

14.45 days

Explanation:

m = Mass of the planet

M = Mass of the star = $0.85\times 1.989\times 10^{30}\ kg=1.69065\times 10^{30}\ kg$

r = Radius of orbit of planet = $0.11\times 149.6\times 10^{9}\ m=16.456\times 10^{9}\ m$

v = Orbital speed

The kinetic and potential energy balance is given by

$\frac{GMm}{r^2}=\frac{mv^2}{r}\\\Rightarrow v=\sqrt{\dfrac{Gm}{r}}\\\Rightarrow v=\sqrt{\dfrac{6.67\times 10^{-11}\times 1.69065\times 10^{30}}{16.456\times 10^{9}}}\\\Rightarrow v=82780.42123\ m/s$

The orbital speed of the star is 82780.42123 m/s

The orbital period is given by

$t=\frac{2\pi r}{v}\\\Rightarrow t=\dfrac{2\pi \times 16.456\times 10^{9}}{82780.42123}\\\Rightarrow t=1249040.48419\ seconds=\dfrac{1249040.48419}{24\times 60\times 60}=14.45\ days$

The orbital period is 14.45 days

5 0

3 years ago

I SEE YOU....STOO CHEATING!!!!!!

professor190 [17]

BAHHAHAJA WHY IS THIS SO FUNNY

4 0

3 years ago

My guess is 15 but I’m not sure. Help please

erastovalidia [21]

The answer to your problem is 15

6 0

3 years ago

Which of these is not measured in hertz? Select all that apply.

Wittaler [7]

A). period is time

b). amplitude can be almost anything that waves . . . length, voltage, pressure, current etc.
But not hertz.

c). frequency ... "oftenness ... reciprocal time. the only item on this list that CAN be measured in Hertz.

d). wavelength ... length units

4 0

3 years ago

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Which is an example of a chemical change?

Mashutka [201]

Answer:

Burning wax

Explanation:

because in burning, wax reacts with oxygen present in the surrounding and forms carbon dioxide and ash

7 0

3 years ago

Read 2 more answers