Why does the same side of the moon always face the earth?

Answers

Answer 1

Answer: Because the moon takes exactly precisely the same time to rotate once on its axis as it takes to revolve once in its orbit around the Earth.

Related Questions

The chemical name for bleach is sodium hypochlorite (NaClO). It is created by a chemical reaction between sodium (Na), chlorine (Cl), and oxygen (O). Which substances are the reactants?
The equation h=80t-16t^2 models the height h in feet reached in t seconds by an object propelled straight up from the ground at a speed of 80 ft/s. use the discriminant to find whether the object will ever reach a height of 90 ft
Which of these is most likely to lead directly to a black market?a. a supply shock c. rationing b. a price floor d. equilibrium
Which of the following do waves carry?a) matter b) energy c) matter and energy d) the medium
What are the scientific method steps and process

Advantages of using low energy appliances

Answers

Using low energy appliances can save you a lot of money. The more energy you use the more expensive it can get. Also it is better for the environment if you use the least energy possible. We don't want to be wasting so use less energy. More energy used, more harm it can do on the environment.

A device that conveys information with analog signals and digital signals is called _____.a) an electron device

b) an electrical device

c) an electric device

d) an electronic device

Answers

I believe the correct answer from the choices listed above is option D. A device that conveys information with analog signals and digital signals is called an electronic device. They are components for controlling the flow of electrical currents for the purpose of information processing and system control.

the correct answer is D

A metal plate is connected by a conductor to a ground through a switch. The switch is initially closed. A charge of +Q is brought close to the plate without touching it, and then the switch is opened. After the switch is opened, the charge +Q is removed. What is the charge on the plate then?

Answers

The charge of the plate will be negative

the positive charge will attract electrons from earth to the plate, leaving the switch opened with no return path.

The excess electron then will be trapped on the plate, causing it to be negative with respect to both earth and the charge

hope this helps

Final answer:

The metal plate will have a net positive charge of +Q. This is due to charging by induction when a +Q charge is brought near it while grounded. Opening the switch before removing the charge leaves the induced +Q charge on the plate.

Explanation:

The metal plate's charge after a

charge is brought near it, the switch is opened and the charge is removed can be explained by understanding the process of

charging by induction

and the behavior of

charge on a conductor

. When the +Q charge is brought near the metal plate, it induces a -Q charge on the plate's closest surface due to the opposite charge attraction. This leaves an equal +Q charge on the farthest surface of the metal plate, as charges inside a conductor distribute to the outer surfaces in static equilibrium. When the switch connecting the plate to ground is opened, the +Q charge on the far side of the plate can't flow to ground and remains on the plate. Removing the +Q charge after that doesn't change the plate's charge as the system is no longer closed; it is now a

net positive charge

of +Q on the metal plate.

Learn more about Charging by Induction here:

brainly.com/question/10254645

#SPJ12

A. B. C. D.
-___________

Answers

where is the data for this question? what is the purpose ?

Heat of Fusion How much thermal energy is needed change 50.0 g of ice at -20.0°C to water at 10.0°C?

Answers

We should divide the problem into 3 separate processes.

1) Bring the temperature of the ice from $-20.0^(\circ)C$ to its melting point ( $0^(\circ)C$ ): the amount of heat needed in this process is
$Q_1=mC_s \Delta T$
where
$m=50.0 g$ is the mass of the ice
$C_s = 2.108 J/g^(\circ)C$ is the specific heat capacity of ice
$\Delta T=0^(\circ)C-(-20^(\circ)C)=20^(\circ)C$ is the increase of temperature

Plugging numbers into the equation, we find
$Q_1 = (50.0 g)(2.108 J/g^(\circ)C)(20^(\circ)C)=2108 J$

2) Fusion of ice
When the ice is at melting point, we need to add a certain amount of heat in order to melt it, and this amount of it is given by:
$Q_2 = mL_f$
where
$m=50.0 g$ is the mass of ice
$L_f = 334 J/g$ is the latent heat of fusion of ice

Plugging numbers into the equation, we find
$Q_2 = mL_f = (50.0g)(334 J/g)=16700 J$
During this phase transition, the temperature of the ice/water does not change.

3) Bring the temperature of the water from $0^(\circ)C$ to $10^(\circ)C$

The amount of heat needed for this process is
$Q_3 = mC_s \Delta T$
where
$m=50.0 g$ is the mass of water
$C_s = 4.187 J/g^(\circ)C$ is the specific heat capacity of water
$\Delta T=10^(\circ)C-0^(\circ)C=10^(\circ)C$ is the increase of temperature

Plugging numbers into the equation, we find
$Q_3 = (50.0 g)(4.187 J/g^(\circ)C)(10.0^(\circ)C)=2094 J$

--> therefore, the total energy needed for the whole process is:
$Q=Q_1+Q_2+Q_3=2108 J+16700 J+2094 J=20902 J=20.9 kJ$

What happens to parallel light rays that strike a concave lens?

Answers

When parallel light rays comes across a concave lens, the rays are refracted outwards. Concave lenses are thinner in the middle part. Parallel light rays diverge and seems to appear from one point called the principal focus. The image formed is smaller.

Answer:

The light ray that pass through the lens diverge and is refracted outwards and never meets at a focal point.

Explanation:

Divergent lenses (also called concave lenses) are transparent bodies bounded by two refractory surfaces with one central axis in common. When a parallel light ray strikes a lens, it is refracted by changing its direction, this refraction in the divergent lens causes the rays to move away from the central axis, ie the ray of light passing through the lens diverges and is refracted outward. and is never at a focal point.

Other Questions

A neutral atom of uranium (U) has 146 neutrons and a mass number of 238. How many protons does it have?

Can any one Explain how energy is conserved in a heat pump.

Imagine a 10kg block moving with a velocity of 20m/s to the left. Calculate the kinetic energy of this block.

Gravitational potential energy is a form of potential energyA.) caused by gravity alone. B.) caused by gravity and that depends on an object's position and mass. C.) caused by gravity and that depends on an object's mass, but not its position. D.) caused by gravity and that depends on an object's position, but not its mass.