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Nadusha1986 [10]
3 years ago
13

How does electricity turn into light in a common lightbulb?

Physics
2 answers:
Anestetic [448]3 years ago
5 0

Answer:

C or D

Explanation:

taurus [48]3 years ago
5 0
C. the electricity heats up the bulb and that’s why whenever you touch a light bulb it’s warm
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A 77.0 kg woman slides down a 42.6 m long waterslide inclined at 42.3. at the bottom, she is moving 20.3 m/s.how much work did f
svlad2 [7]

Answer:

W = 21409.2 J

Explanation:

Given,

The mass of the woman, m = 77 Kg

The length of the water slide, S = 42.6 m

The inclination of the water slide, ∅ = 42.3

The constant velocity of the women sliding, 20.3 m/s

The kinetic friction of the sliding force is given by the formula

                               Fₓ = μₓ η

Where,

                    μₓ - coefficient of kinetic friction

                     η - normal force acting on the body

Since the water slide is inclined at an angle and the person is sliding with constant velocity. The coefficient of friction becomes,

                     μₓ = tan∅

And,                η = mg cos∅

Therefore, the kinetic friction force becomes

                          Fₓ =  tan∅  mg cos∅

Substituting the given values in the above equation

                           Fₓ = 0.9 x 77 x 9.8 x 0,74

                               = 502.56 N

The work done by the kinetic friction on the person

                            W = Fₓ · S    

                                = 502.56 N x 42.6 m

                                = 21409.2 J

Hence, the work done by the friction on the woman is, W = 21409.2 J

8 0
3 years ago
A cube of wood is floating on water. a cube of iron is totally submerged in water. the cubes are equal in volume. which cube has
-BARSIC- [3]
The one that's completely submerged is displacing more water, so the buoyant force on it is greater.
5 0
3 years ago
A truck with 34-in.-diameter wheels is traveling at 55 mi/h. Find the angular speed of the wheels in rad/min, *hint convert mile
julia-pushkina [17]

Answer:

w =3416 rad/min  

Explanation:

The angular speed of the wheels in radians can be defined as follows:

w=\frac{s}{r}

where

w = angular speed

r = radius of the wheel

s =distance traveled per minute

in this case we have

r = 34/2 inches = 17 inches

s = (55 mi/hr) (5280 ft/mi) (12 in/ft) (1hr/60min) = 58,080 inches/min

Therefore, w = 58,080/ 17 = 3416 rad/min  

7 0
4 years ago
The critical angle for total internal reflection for cubic zirconia surrounded by air is 27.0°. Calculate the polarizing angle f
Anna11 [10]

Answer:

Polarizing angle, \theta_{P} = tan^{- 1}{2.2} = 65.56^{\circ}

Given:

Critical angle, \theta_{cr} = 27^{\circ}

Solution:

Now, in Total Internal Reflection (TIR), the critical angle for cubic zirconia is given by:

sin\theta_{cr} = \frac{1}{\mu_{Z}}                      (1)

where

{\mu_{Z} = refractive index of zirconia

From eqn (1):

\mu_{Z} = \frac{1}{sin\theta_{cr}}

\mu_{Z} = \frac{1}{sin(27^{\circ})} = 2.2

Now, the angle of polarization is given by:

tan\theta_{P} = \mu_{Z}

Therefore,

\theta_{P} = tan^{- 1}{2.2} = 65.56^{\circ}

8 0
3 years ago
1. Astronomers measure the angle that the star appears to jump when viewing it from two different points in Earth's orbit. What
Tema [17]
1) D 3) A 4) A 5) A your welcome hopefully it helped
5 0
4 years ago
Read 2 more answers
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