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UNO [17]
3 years ago
6

If the mass of the earth and all objects on it were suddenly doubled, but the size remained the same, the acceleration due to gr

avity at the surface would becomeA) 1/2 of what it now is.B) 2 times what it now is.C) 1/4 of what it now is.D) the same as it now is.E) 4 times what it now is.
Physics
1 answer:
Lerok [7]3 years ago
5 0

Answer:

B) 2 times what it now is

Explanation:

The acceleration due to gravity at the surface of the Earth is given by

g=\frac{GM}{R^2}

where

G is the gravitational constant

M is the mass of the Earth

R is the Earth's radius

In this problem, the mass of the Earth is doubled:

M' = 2M

while the radius remains the same:

R' = R

so the new acceleration due to gravity would be

g'=\frac{GM'}{R'^2}=\frac{G(2M)}{R^2}=2\frac{GM}{R^2}=2g

so, the acceleration due to gravity would become twice the current value.

Note also that the value of g does not depend on the mass of the objects involved.

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At a distance of 0.220 cm from the axis of a very long charged conducting cylinder with radius 0.100cm, the electric field is 49
Scorpion4ik [409]

Answer:

At the distance of 0.220cm from the axis.

r = 0.220cm = 0.0022m, E = 490N/C, e0 = 8.854 x 10^-12F/m

Linear charge density = 2*π*e0*r*E = 2 x 3.142 x 8.854x10^-12 x 0.0022 x 490 = 5.998 x 10^-11C/m

Thus, To Calculate the Electric field at the distance r = 0.616cm from the cylinder axis, we substitute the calculated linear change density in the equation

E = (linear charge density)/2*π*e0*r

Here, r = 0.616cm = 0.00616m

E = [(5.998 x 10^-11)/(2 x 3.142 x 8.854 x 10-12 x 0.00616)]

E = 175N/C

Explanation:

The Electric field of a charged conducting cylinder obey the Gauss Law.

Therefore, the Electric field is given as:

E = (linear charge density)/4πe0r,

Where e0 is the permittivity of free space with constant value of 8.854 x 10^-12F/m, r is the radial distance from the axis.

3 0
3 years ago
What device uses AC current to operate
Mashcka [7]
Transformer. Its an electrical device that uses electromagnetic induction to pass an alternating current (AC) signal from one electric circuit to another, often changing the voltage and electrical current
5 0
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A patient is given supplemental antidiuretic hormone (ADH). How will the patient's kidneys respond to the ADH?
kvv77 [185]
ADH binds onto the cells of the collecting duct and makes them more permeable to water, thus more water is reabsorbed by osmosis back into the blood. The blood becomes more dilute and the urine more concentrated
3 0
3 years ago
When a car suddenly stops at a red light, a book lying on the car seat slides forward. Why does the book continue to move forwar
mr_godi [17]

Answer:

<u>The book's inertia causes it to continue moving.</u>

Inertia can be defined as the tendency of an object such as a book to continue in its state of motion or remain at rest, unless it is acted upon by an external force.

Explanation:

Does this help you???

7 0
2 years ago
What is the difference between an electrolyte and a nonelectrolyte
Pepsi [2]

Answer:

The difference between the Electrolyte and Non-Electrolyte are given in the explanation part.    

Explanation:

  • ELECTROLYTES are salts or molecules which ionize in solution fully.
  • Electrolyte solutions thus conduct electricity readily.    

 whereas

  • NON ELECTROLYTES in water do not dissociate from ions,
  • non-electrolyte solutions do not conduct electricity.
7 0
3 years ago
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