A man run 300 meter west in 60 sec he run 100

Which of these statements best describes the impact of ocean thermal power and current power on the environment?

zzz [600]

Answer:

A. Current power may decrease the fish population.

Explanation:

The statement that best describes the impact of ocean thermal power and current power on the environment is that current power may decrease the fish population.

The environment is made up of living and non-living components that co-exist and interact with one another.

Harnessing current power from ocean movement will seriously affect the fish population.
Most fishes are not sedentary. They move and glide through the water.
When current power causes a change in the environment of the fish.
This will definitely affect the normal condition prevalent in the body of water.

5 0

3 years ago

1. Calculate how many electrons you need to get a charge of 1 coulomb.

belka [17]

1) To make a charge of 1 Coulomb, $6.25\cdot 10^{18}$ electrons are needed

2) $3.75\cdot 10^{19}$ electrons are needed to make that current

3) The potential difference is the work done per unit charge by an electric field

4) False, false, true

Explanation:

1)

The charge of one electron is equal to (in magnitude)

$q=1.6\cdot 10^{-19}C$

This is also known as fundamental charge, and it is also indicated with the letter $e$ .

The charge in this problem is

$Q=1 C$

Therefore, in order to calculate how many electrons are in 1 Coulombd of charge, we just divide the total charge by the charge of one electron:

$n=\frac{Q}{q}=\frac{1}{1.6\cdot 10^{-19}}=6.25\cdot 10^{18}$

2)

The current intensity is defined as

$I=\frac{Q}{t}$

where

Q is the charge passing through a given point of a circuit in a time interval t

In this problem, we have

t = 60 s

I = 100 mA = 0.1 A

Therefore, the charge passing through the circuit is

$Q=It=(0.1)(60)=6 C$

We know that the charge of one electron is

$q=1.6\cdot 10^{-19}C$

So the number of electrons is

$n=\frac{Q}{q}=\frac{6}{1.6\cdot 10^{-19}}=3.75\cdot 10^{19}$

3)

The electrical voltage (also called potential difference) can be understood by using the concept of energy and work.

In fact, the work done by an electric field on a charge of magnitude q is

$W=q\Delta V$ (1)

where $\Delta V$ is the potential difference between the initial and final point of motion of the charge. The potential difference is responsible for "pushing" the charge through the circuit (in particular, a positive charge is pushed towards a point of lower potential, while a negative charge is pushed towards a point of higher potential), and when this happens, the electric potential energy of the charge (due to its position in the electric field) is converted into kinetic energy (energy of motion).

So, the potential difference is basically the work done per unit charge by an electric field responsible for the acceleration of a charge, as we can rewrite eq.(1) as

$\Delta V = \frac{W}{q}$

So in this case (where the electric voltage is 5 volts), it means that the work done by this electric field per unit charge is 5 J per Coulomb of charge.

4)

False: Current is the consequence and voltage is the cause. In fact, the voltage (the potential difference between two points in the circuit) is responsible for "pushing" the charges through the circuit, and when the charges start moving, they produce a current.

False: only the battery is a source of voltage. A battery is a device that produces an electromotive force (another name for potential difference), which is responsible for "pushing" the charges through the circuit. A socket, instead, is just a device used to connect another electric device to a voltage supply.

True: an electric current can only flow in a closed circuit. When the circuit is open, in fact, there is a point in the circuit where the flow of charge is interrupted: this means that the current can no longer flow in the circuit, so there is no electric current in an open circuit.

Learn more about current and potential difference:

brainly.com/question/4438943

brainly.com/question/10597501

brainly.com/question/12246020

#LearnwithBrainly

4 0

4 years ago

What energy transformation is performed by a radio ?

ElenaW [278]

why was my answer taken off? There is no way to show evidence for this but ig I can explain. The electrical energy is what is used to power the radio so it works, then the energy is used to catch radio waves which makes sound energy. So the answer is C, electrical energy to sound energy

8 0

3 years ago

Read 2 more answers

Newton's law of cooling states that the rate of change of temperature of an object in a surrounding medium is proportional to th

Nastasia [14]

Answer:

$T = 40 + e^{3.68t} e^{2.99}$

Explanation:

The differential equation for given is given as

$\frac{dT}{dt} = - k(T-T_s)$

integrating above equation we have

ln(T-T_s) = -kt + C

At t = 0 , T(0) = 60

$ln(60- 40) = -k\times 0 + C$

2.99 = C

At t =1 , T(1) = 40.49887

$ln(40.49787 - 40) = -k\times 1 + 2.99$

- k = -3.687

So we have

$T- 40 = e^{3.68t + 2.99}$

$T = 40 + e^{3.68t} e^{2.99}$

4 0

3 years ago

A machine is applying a torque to rotationally accelerate a metal disk during a manufacturing process. An engineer is using a gr

Viefleur [7K]

Explanation:

Question 9 A machine is applying a torque to rotationally accelerate a metal disk during a manufacturing process. An engineer is using a graph of torque as a function of time to determine how much the disk's angular speed increases during the process The graph of torque as a function of time starts at an initial torque value and is a straight line with positive slope. What aspect of the graph and possibly other quantities must be used to calculate how much the disk's angular speed increases during the process? The slope of the graph multiplied by the disk's radius will equal the change in angular speed The area under the graph multiplied by the disk's radius will equal the change in angular speed. The slope of the graph divided by the disk's rotational inertia will equal the change in angular speed. The area under the graph divided by the disk's rotational inertia will equal the change in angular speed. The area under the graph multiplied by the disk's rotational inertia will equal the change in angular speed E

8 0

3 years ago

Read 2 more answers

A man run 300 meter west in 60 sec he run 100 ​

A man run 300 meter west in 60 sec he run 100