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mars1129 [50]
3 years ago
14

(WIFI)

Physics
1 answer:
attashe74 [19]3 years ago
6 0

Answer:

Are you a client in Fca? If so,I am too..

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The short-circuiting logical operators ____. Group of answer choices enable doing as little as is needed to produce the final re
ohaa [14]

Answer:

D. cause the program to stop execution when the expression is evaluated

Explanation:

D. cause the program to stop execution when the expression is evaluated

7 0
4 years ago
Which of the following describes a role of gravity in the formation of our solar system?
Black_prince [1.1K]
I think the answer is A because it is gravity that caused the planets to form and start orbiting around the nearest star which is the sun
5 0
4 years ago
Read 2 more answers
Applying the Law of Conservation of Energy. If a car was released down the track from a height what happens to the potential ene
erastova [34]

Answer:

According to the law of conservation of energy, energy cannot be created or destroyed,  although it can be changed from one form to another.    KE + PE = constant. A simple example involves a stationary car at the top of a hill.  As the car coasts down the hill, it moves faster and so it’s kinetic energy increases and it’s potential energy decreases.  On the way back up the hill, the car converts kinetic energy to potential energy.  In the absence of friction, the car should end up at the same height as it started.

This law had to be combined with the law of conservation of mass when it was determined that mass can be inter-converted with energy.

One can also imagine the energy transformation in a pendulum.  When the ball is at the top of its swing, all of the pendulum’s energy is potential energy.   When the ball is at the bottom of its swing, all of the pendulum’s energy is kinetic energy.   The total energy of the ball stays the same but is continuously exchanged between kinetic and potential forms

4 0
3 years ago
At what angle should the axes of two Polaroids be placed so as to reduce the intensity of the incident unpolarized light to 1515
Talja [164]

Complete  Question

At what angle should the axes of two Polaroids be placed so as to reduce the intensity of the incident unpolarized light to 1/5.

Answer:

The  angle is  

Explanation:

From the question we are told that

   The light emerging from second Polaroid is 1/5 the  unpolarized

Generally the intensity of light emerging from the first Polaroid is mathematically represented as

             I_1 = \frac{I_o}{ 2 }

Generally from the Malus law the intensity of light emerging from the second Polaroid  is mathematically represented

      I_2  =  I_1 cos^2 (\theta )

=>   cos^2 (\theta ) =  \frac{I_2}{I_1 }

=>   cos (\theta) =  \sqrt{ \frac{I_2}{I_1} }

From the question I_2  =  \frac{I_o}{5}

     cos (\theta) =  \sqrt{ \frac{ \frac{ I_o}{5} }{\frac{I_o}{2} } }

     cos (\theta) =  \sqrt{ \frac{2}{5} }

=>    \theta =   cos ^{-1} [\sqrt{\frac{2}{5}}  ]

=>    \theta  =  50.77^o

8 0
3 years ago
A person makes ice tea by adding ice to 1.8 kg of hot tea, initially at 80°C. How many kilograms of ice, initially at 0.00°C, ar
Nata [24]

Answer:

The required mass of ice is 12.5 kg.

Explanation:

Mass of hot tea, m_{t} = 1.8 kg

Initial temperature of hot tea = 80°C = 353 K

Initial temperature of ice = 0.00°C = 273 K

Final temperature of mixture = 10°C = 283 K

Heat of fusion of ice, L = 334 kJ/kg

Specific heat capacity of tea, c_{t} = Specific heat capacity of water = 4190 J/kg/K

Heat lost tea = Heat gained by ice

m_{t}c_{t}ΔT_{t} = m_{i}L +  m_{i}c_{i}ΔT_{t}

m_{t}c_{t}ΔT_{t} = m_{i} (L +  c_{i}ΔT_{t})

1.8 x 4190 x (353 - 283) = m_{i}(334 + (4190 x (283 - 2730))

1.8 x 4190 x 70 = m_{i}(334 + (4190 x 10))

527940 = 42234m_{i}

m_{i} = \frac{527940}{42234}

    = 12.5004

m_{i} = 12.5 kg

The required mass of ice is 12.5 kg.

4 0
3 years ago
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