All categories

3 years ago

Assume a solar cell would produce a current of 500mA and 3 V. What is the power of this solar cell?

Physics

1 answer:

defon3 years ago

8 0

Answer:

the power of the solar cell is 1.5 watts

Explanation:

Recall that power is defined as the product of the voltage (V) times the running current (I): Power = V * I.

The only thing we have to take care of before actually performing the operation, is to convert milliamps into Amps, so our answer comes directly in the appropriate units (Watts). 500 mAmps can be written as 0.5 Amps, then, the product becomes:

Power = V * I = 3 V * 0.5 Amps = 1.5 watts

You might be interested in

Which is heavier a kilogram of iron or a kilogram of feathers?

inessss [21]

Answer:

they both weight the same

Explanation:

they both weigh one kilo so they are the same

5 0

3 years ago

Read 2 more answers

A roller coaster has a vertical loop with radius 25.7 m. With what minimum speed should the roller-coaster car be moving at the

gogolik [260]

Answer:

15.88m/s

Explanation:

At the top of the roller coaster you will have three forces acting on the roller-coaster. See the image below. Fc is the centripetal force (for an object in circular motion), Fg is the gravitational force, and Fn is the normal force. To achieve the minimum speed we assume the roller-coaster is barely touching the vertical loop and so the normal force is zero. This leaves two acting forces.

$F_g = F_c\\mg = \frac{m\times v^2}{r}\\v = \sqrt{gr} = \sqrt{9.81 \times 25.7} = 15.88 m/s$

7 0

3 years ago

Problem: Hooke's law states that the force on a spring varies directly with the distance that it is stretched. If a spring has a

Scorpion4ik [409]

Answer:

Restoring force of the spring is 50 N.

Explanation:

Given that,

Spring constant of the spring, k = 100 N/m

Stretching in the spring, x = 0.5 m

We need to find the restoring force of the spring. It can be calculated using Hooke's law as "the force on a spring varies directly with the distance that it is stretched".

$F=kx$

$F=100\ N/m\times 0.5\ m$

F = 50 N

So, the restoring force of the spring is 50 N. Hence, this is the required solution.

7 0

4 years ago

Calculate the root mean square velocity of the nitrogen molecules, in meters per second (m/s). Do not include the unit of measur

kipiarov [429]

This question involves the concepts of average kinetic energy and velocity.

Complete question: Calculate the root mean square velocity of the nitrogen molecules, at 25°C, in meters per second (m/s). Do not include the unit of measure in your answer.

The root mean square velocity of the nitrogen molecule at 25°C is "727.66 m/s".

The average kinetic energy of gas molecules is given by the following formula:

$K.E=\frac{3}{2}KT$

Also,

$K.E = \frac{1}{2}mv^2$

Comparing both equations we get:

$\frac{3}{2}KT=\frac{1}{2}mv^2\\\\v=\sqrt{\frac{3KT}{m}}$

where,

v = root men square velocity = ?

K = Boltzman's constant = 1.38 x 10⁻²³ J/k

T = absolute temperature = 25°C + 273 = 298 k

m = mass of nitrogen molecule = 2.33 x 10⁻²⁶ kg

Therefore,

$v=\sqrt{\frac{3(1.38\ x\ 10^{-23}\ J/k)(298\ k)}{2.33\ x\ 10^{-26}\ kg}}$

v = 727.66 m/s

Learn more about the root mean square velocity here:

brainly.com/question/2020688?referrer=searchResults

6 0

3 years ago

What is the total charge of 1.0g of electrons?

Serhud [2]

1.0 gram (g) of electrons would contain 10^27 electrons Electrons have an electric charge of −1.602×10−19 coulomb so total charge of 1 g electrons = -1.602 x 10^-19 x 10^27 = -1.602 x 10^8

8 0

3 years ago