1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
IgorLugansk [536]
3 years ago
10

How much power is produced by a flashlight that has a voltage of 12 volts and a current of 6.5 × 10-2 amps? 0.78 watts 78 watts

190 watts 0.0054 watts 1.9 watts
Physics
1 answer:
galina1969 [7]3 years ago
5 0

As per the question we are asked to calculate the average power produced by flashlight.

It is given that the voltage [V] = 12 volts.

The current flowing through the circuit  [I]  = 6.5*10^-2\ ampere

The power consumed in an electrical circuit is the product of voltage and current flowing through that circuit. Mathematically it can be written as -

                    power = voltage×current

                      i.e P = VI                           [here p is the power]

Putting the values of V and I the power is calculated to be-

                                                           P = VI

                                                                  = 12 volt*6.5*10^-2\ ampere

                                                                  =0.78 watt

Here watt is the unit of electric power.

                     

You might be interested in
Which part of the roller coaster system determines the amount of kinetic energy in the system
eduard
The lowest point, where the amount of energy is the greatest
5 0
4 years ago
Read 2 more answers
What is boron plus sulfur
suter [353]

Answer:

Boron sulfide is the chemical compound with the formula B2S3. This polymeric material that has been of interest as a component of "high-tech" glasses and as a reagent for preparing organosulfur compounds. ... Like the boron oxides, B2S3 readily forms glasses when blended with other sulfides such as P4S10.

Explanation:

Chemical formula: B2S3

Coordination geometry: B: planar, sp2

7 0
3 years ago
A parallel-plate air capacitor is made from two plates 0.190 m square, spaced 0.770 cm apart. It is connected to a 120 V battery
Naddik [55]

Answer:

aaksj

Explanation:

a) the capacitance is given of a plate capacitor is given by:

C = \epsilon_0*(A/d)

Where \epsilon_0 is a constant that represents the insulator between the plates (in this case air, \epsilon_0 = 8.84*10^(-12) F/m), A is the plate's area and d is the distance between the plates. So we have:

The plates are squares so their area is given by:

A = L^2 = 0.19^2 = 0.0361 m^2

C = 8.84*10^(-12)*(0.0361/0.0077) = 8.84*10^(-12) * 4.6883 = 41.444*10^(-12) F

b) The charge on the plates is given by the product of the capacitance by the voltage applied to it:

Q = C*V = 41.444*10^(-12)*120 = 4973.361 * 10^(-12) C = 4.973 * 10^(-9) C

c) The electric field on a capacitor is given by:

E = Q/(A*\epsilon_0) = [4.973*10^(-9)]/[0.0361*8.84*10^(-12)]

E = [4.973*10^(-9)]/[0.3191*10^(-12)] = 15.58*10^(3) V/m

d) The energy stored on the capacitor is given by:

W = 0.5*(C*V^2) = 0.5*[41.444*10^(-12) * (120)^2] = 298396.8*10^(-12) = 0.298 * 10 ^6 J

6 0
3 years ago
Read 2 more answers
a refridgerator has a coefficient of performance equal to 4.2 how much work must be done on the refridgerator in order to remove
anastassius [24]

Answer:

60 J

Explanation:

Given That

Coefficient of performance, CoP = 4.2

Quantity of heat of the refrigerator, Q = 250 J

Work done by the refrigerator, W = ?

First, it should be noted that the Coefficient of Performance can be said to be, the ratio of the Heat required to the Work done by the system. Mathematically written as,

CoP = Q / W

Since we are already given the values from our question, we can plug it in as it's a pretty straightforward question

4.2 = 250 / W, making W subject of formula, we have

W = 250 / 4.2

W = 60J

Thus, the Work done by the refrigerator is 60 J

5 0
3 years ago
A sample of an unknown gas has a density of 0.0009 g/cm3.
Gnoma [55]

Answer:   A

The option A is the most accurate description of unknown gas density relative to other gases in the table.

Observe the table clearly and compare it with given density of unknown gas i.e., <em>0.0009 g/cm³ . </em>

In the table, it is given that

1. Hydrogen  - 0.00009 g/cm³, which is less than 0.0009 g/cm³, because the value of hydrogen has four zeros after the decimal point on right side, (that is decimal zero places up to ten thousands) but when comparing the value of unknown gas, it has zeros up to thousands place only on right side.

Hence, while moving on right side of the decimal point, the number of zeros decreases the value of given number.

(0.00009 > 0.0009)

similarly  observe the remaining values

2. 0.0009  >  0.00018 (Helium)

3. 0.0009  <  0.00122 (AIr)

4. 0.0009  <  0.00142 (Oxygen)

<em>So, answer is A. </em>


8 0
3 years ago
Read 2 more answers
Other questions:
  • When two light waves arrive at the same place at the same time they create a?
    15·1 answer
  • I need help answering 14,15,16,17
    9·1 answer
  • You can make a concentrated solution more dilute by adding solvent.<br><br> True or false
    9·1 answer
  • A worker pushes a 1080 N crate with a horizontal force of 345 N a distance of 14 m. Assume the coefficient of kinetic frictin be
    8·2 answers
  • The maximum speed at which a patch of the surface moves during a vibration is 4.5 m/s . What is the amplitude of the vibration,
    6·1 answer
  • Water has a very high specific heat capacity when compared to most other common materials. In fact, ethyl alcohol has a specific
    15·1 answer
  • The diagram shows a swinging pendulum.
    9·2 answers
  • How much power is used if an athlete lifts a 50N weight up 2 meters in 10 seconds?
    5·1 answer
  • 1. A student notices that wearing darker colors in sunlight makes him feel warmer, so he decides to conduct an experiment. He ta
    10·1 answer
  • I’ll give brainliest
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!