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3 years ago

What has more gravity-Earth's moon or the Sun?Why?

Physics

1 answer:

charle [14.2K]3 years ago

7 0

Answer:

Even though the sun is much more massive and therefore has stronger overall gravity than the moon, the moon is closer to the earth so that its gravitational gradient is stronger than that of the sun.

Explanation:

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Which of the following should not be held constant during this experiment?

Artyom0805 [142]

The answer is c. the degree of wetness of the paper towels.

8 0

3 years ago

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parallel-plate air capacitor is made from two plates 0.070 m square, spaced 6.3 mm apart. What must the potential difference bet

Rom4ik [11]

Answer:

V = 576 V

Explanation:

Given:

- The area of the two plates A = 0.070 m^2

- The space between the two plates d = 6.3 mm

- Te energy density u = 0.037 J /m^3

Find:

- What must the potential difference between the plates V?

Solution:

- The energy density of the capacitor with capacitance C and potential difference V is given as:

u = 0.5*ε*E^2

- Where the Electric field strength E between capacitor plates is given by:

E = V / d

Hence,

u = 0.5*ε*(V/d)^2

Where, ε = 8.854 * 10^-12

V^2 = 2*u*d^2 / ε

V = d*sqrt ( 2*u / ε )

Plug in values:

V = 0.0063*sqrt ( 2 * 0.037 / (8.854 * 10^-12) )

V = 576 V

4 0

3 years ago

A metal spoon can be classified as which of the following

LenaWriter [7]

What are the options

4 0

3 years ago

The box now rests on a frictionless ramp angled at 15◦ . The mover pulls up on a rope attached to the box to move it up the incl

Nataly [62]

Answer:

F = 84.61 N

Explanation:

As in the figure, since there is no friction so if component of Force applied along the incline is greater than the component of weight along the incline, then the object will move up the incline.

component of Force along the incline = F cos(23° - 15°) = F cos(8°)

component of weight along the incline = 33*g*sin(15°) = 33*9.81*sin(15°)

Equating the above two components of forces will give the minimum Force required.

F cos(8°) = 33*9.81*sin(15°)

F = 33*9.81*sin(15°) / cos(8°) (calculate the value using a scientific calculator)

3 0

3 years ago

Charge q is 1 unit of distance away from the source charge S. Charge p is four times further away. The force exerted between S a

zhenek [66]

The correct answer is:

sixteen times

In fact, the distance between charge q and the source S is 1 unit. Instead, the distance between charge p and the source S is 4 units. The magnitude of the electrostatic force is inversely proportional to the square of the distance between the charge and the source:

$E \sim \frac{1}{r^2}$

where r is the distance. If we take the force between q and S as reference, we have r=1, so that

$E_{qS}=\frac{1}{1^2}=1$

while the force between p and S is

$E_{pS}=\frac{1}{4^2}=\frac{1}{16}$

Therefore, we see that the force exerted between q and S is 16 times the force exerted between p and S.

4 0

2 years ago

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