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Stolb23 [73]
4 years ago
5

What are 3 common sources of voltage difference?

Physics
1 answer:
rodikova [14]4 years ago
3 0
We are asked to enumerate 3 different sources of potential difference and the answers are listed below:
1. There was two parallel sources and voltage of each source is different from each other.
2. Different batteries are connected.
3, Different values of resistors were used in the circuit.

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Which explains why a gas does not have a fixed shape?
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A gas doesn't have a fixed shape because the amount of space between the molecules in gas can change easily. B. the particles are not compressible
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A 50.0 g toy car is released from rest on a frictionless track with a vertical loop of radius R (loop-the-loop). The initial hei
Mariana [72]

Answer:

the speed of the car at the top of the vertical loop  v_{top} = 2.0 \sqrt{gR \ \ }

the magnitude of the normal force acting on the car at the top of the vertical loop   F_{N} = 1.47 \ \ N

Explanation:

Using the law of conservation of energy ;

mgh = mg (2R) + \frac{1}{2}mv^2_{top}\\\\mg ( 4.00 \ R) = mg (2R) + \frac{1}{2}mv^2_{top}\\\\g(4.00 \ R) = g (2R) + \frac{1}{2}v^2 _{top}\\\\v_{top} = \sqrt{2g(4.00R - 2R)}\\\\v_{top} = \sqrt{2g(4.00-2)R

v_{top} = 2.0 \sqrt{gR \ \ }

The  magnitude of the normal force acting on the car at the top of the vertical loop can be calculated as:

F_{N} = \frac{mv^2_{top}}{R} \ - mg\\\\F_{N} = \frac{m(2.0 \sqrt{gR})^2}{R} \ - mg\\\\F_{N} = [(2.0^2-1]mg\\\\F_{N} = [(2.0)^2 -1) (50*10^{-3} \ kg)(9.8 \ m/s^2]\\\\

F_{N} = 1.47 \ \ N

4 0
4 years ago
The planet most like the earth in size and gravitation is:
Contact [7]

Answer:

Mars

Explanation:

4 0
3 years ago
Read 2 more answers
Very short pulses of high-intensity laser beams are used to repairdetached portions of the retina of the eye. The brief pulses o
maw [93]

Answer:

a)  W = 3.87 10⁻⁴ J , b)  P = 3.10 10⁻³ Pa , c)  λ = 671. 6 nm , d) frequency does not change , e)  Emax = 1.39 C / m  and f) Bmax = 4.7 10⁻⁹ T

Explanation:

a) Let's use the concepts of power that is work for the unit of time and work is the change of kinetic energy

    P = W / t

An electromagnetic wave has an intensity

    I = P / A =

   W = P t

   W = 258 10⁻³ 1.5 10⁻³

   W = 3.87 10⁻⁴ W s

   W = 3.87 10⁻⁴ J

b) the radiation pressure is given by the ratio

    P = I / c

Where I is the intensity

     I = Powers / A

    A = π r² = π (d/2)²

     I = 258 10⁻³ / π (297.5 10⁻⁶)²

     I = 9.29 10 5 W / m²

     P = 9.29 10⁵/3 10⁸

     P = 3.10 10⁻³ Pa

c) The wavelength when passing a measured of different refractive index changes in the way

     λ = λ₀ / n

     λ = 900 10⁻⁹ / 1.34

     λ = 671.6 10⁻⁹ m

     λ = 671. 6 nm

d) when the light strikes a medium creates a forced oscillation in the electrons of the medium, this is a resonance phenomenon, so the frequency does not change

e) The maximum electric field is

      I = Emax2 / 2 μ₀ c

     Emax = Ra (2 μ₀ c I)

     Emax = Ra (2 4 π 10⁻⁷ 3 10⁸ 258 10⁻³)

     Emax = 1.39 C / m

f) the elective and magnetic fields are related

     c = Emax Bmax

     Bmax = Emax / c

     Bmax = 1.39 / 3 10⁸

     Bmax = 4.7 10⁻⁹ T

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When do cells use oxygen to release energy
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According to the theory, energy realized during the reaction is captured by the energy-carrying molecule ATP (adenosine triphosphate). Cellular respiration is the process by which organism use oxygen to break down food molecule to get chemical energy for cell function
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