All categories

2 years ago

How much money would be saved by turning off one 100.0-W lightbulb 3.0 h/day for 365 days if the

Physics

1 answer:

Pavlova-9 [17]2 years ago

3 0

Answer:

the money that would be saved is $13.14.

Explanation:

Given;

power consumed by the light bulb, P = 100 W = 0.1 kW

time of running the bulb, t = 3 hours for 365 days = 1,095 hours

cost rate of power consumption, C = $0.12 per kWh

Energy consumed by the light bulb for the given days;

E = Pt

E = 0.1 kW x 1,095 hr

E = 109.5 kWh

Cost of energy consumed = 109.5 kWh x $0.12 / kWh

= $13.14

Therefore, the money that would be saved is $13.14.

You might be interested in

2. A test reveals that 150 J of work is required to lift an object 3 m at a

Nuetrik [128]

Answer:

50N

Explanation:

W=Fd

150=F(3)

50N=F

7 0

2 years ago

In a system with only a single force acting upon a body, what is the relationship between the change in kinetic energy and the w

Makovka662 [10]

Answer: W.D = 1/2mv^2

Explanation:

If an external force or a single force is acting on a body. Just like the first law of thermodynamics, the force acting on the body will cause work done on the system.

Work done = force × distance

And the work done on the body will cause the molecules of the body to experience motion and thereby producing kinetic energy.

The work done will be converted to kinetic energy.

W.D = 1/2mv^2

6 0

3 years ago

What is the chemical formula for Tetrasulfur pentoxide <br>( explain)<br>

juin [17]

Answer:

s4n4 the chemical formula

6 0

3 years ago

DISPLACEMENT WITH CONSTANT ACCELEration. Given information: displacement=64m, acceleration=9.81m\s and time interval=3s. calcula

balandron [24]

HEYEYEYEYYEYEYDYDYDYD

3 0

3 years ago

A light ray in air is incident on a transparent material whose index of refraction is t. o. Find an expression for the (non-zero

vovangra [49]

Answer:

Explanation:

Refractive index f the medium, n = t

Let the angle of incidence is i

(a) As given in the question, the angle of refraction is half of angle of incidence.

Let the angle of refraction is r

r = i / 2

By use of Snell's law

$n = \frac{Sin i}{Sin r}$

By substituting the values, we get

$t = \frac{Sin i}{Sin \frac{i}{2}}$

By using the formula of trigonometry

Sin2Ф = 2 SinФ CosФ

So, $t = \frac{2Sin \frac{i}{2}\times Cos\frac{i}{2}}{Sin \frac{i}{2}}$

$t = 2Cos\frac{i}{2}$

(b) For glass, the value of refractive index is 1.5, so the above expression becomes

$1.5 = 2Cos\frac{i}{2}$

$Cos\frac{i}{2}=0.75$

$\frac{i}{2}=41.4$

i = 82.8°

8 0

3 years ago