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3 years ago

Why does the moon orbit the earth as the earth orbits the sun?will give brainliest

1 answer:

6 0

As the Earth rotates, it also moves, or revolves, around the Sun. ... As the Earth orbits the Sun, the Moon orbits the Earth. The Moon's orbit lasts 27 1/2 days, but because the Earth keeps moving, it takes the Moon two extra days, 29 1/2, to come back to the same place in our sky.

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18. Compare the momentum of a 5450 kg truck moving at 8.00 m/s to the momentum of a 2725 kg car moving at 16.0 m/s.

avanturin [10]

Answer:

They are equal

Explanation:

Multiply the mass by the velocity.

6 0

3 years ago

What simple machine is a fishing pole?

elena55 [62]

<span>A fishing pole is made up of 3 simple machines, it is a 3rd class lever, a pulley and a wheel and axle which is your reel.</span>

7 0

4 years ago

Read 2 more answers

The weight of spaceman Speff at the surface of planet X, solely due to its gravitational pull, is 389 N. If he moves to a distan

9966 [12]

Answer

given,

W = weight of speff at surface of planet = 384 N

h= height = 1.86 x 10⁴ Km

W' = weight of speff at height h from the planet = 24.31 N

Ms = speff mass = 75 kg

M= mass of planet = ?

R = radius of planet

G = 6.67 x 10⁻¹¹ m³/kg.s²

$g = \dfrac{W}{M}$

$g = \dfrac{389}{75}$

g = 5.187 m/s²

we know,

$g = \dfrac{GM}{r^2}$

$5.19 = \dfrac{GM}{r^2}$ .......(1)

now,

$g' = \dfrac{W}{M}$

$g' = \dfrac{24.31}{75}$

g' = 0.324 m/s²

$g = \dfrac{GM}{(r+h)^2}$

$0.324= \dfrac{GM}{(r+h)^2}$ .........(2)

dividing equation (1)/(2)

$\dfrac{5.19}{0.324}=(\dfrac{(r+h)}{r})^2$

$4=1+\dfrac{h}{r}$

$r = \dfrac{1.86\times 10^4}{3}$

r = 6.2 x 10⁶ m

mass of planet X

from equation 1

$M = \dfrac{g.r^2}{G}$

$M = \dfrac{5.19 \times (6.2\times 10^6)^2}{6.2 \times 10^{-11}}$

M = 3.21 x 10²⁴ kg

8 0

3 years ago

John does 3.2J of work to lower the window shade in her bedroom a distance of 0.8m. How much force must John exert on the window

Gekata [30.6K]

Answer:

$\boxed {\boxed {\sf 4 \ Newtons}}}$

Explanation:

Work is energy transferred when an object is moved. It is the product of force and distance.

$W= F*d$

John did 3.2 Joules of work or 3.2 Newton meters of work (the units are equivalent). The window shade was lowered a distance of 0.8 meters.

W=3.2 N*m
d= 0.8 m

Substitute the values into the formula.

$3.2 \ N *m = F * 0.8 \ m$

We are solving for the force, so we must isolate the variable F. It is being multiplied by 0.8 meters. The inverse operation of multiplication is division, so divide both sides of the equation by 0.8 m.

$\frac {3.2 \ N*m}{0.8 \ m}= \frac{ F* 0.8 \ m}{0.8 \ m}$