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Annette [7]
2 years ago
7

Equinox means equal _____.

Physics
1 answer:
inysia [295]2 years ago
7 0
C. day and night hours
You might be interested in
For the circuit shown, calculate
RSB [31]

For the circuit shown

a.the total resistance   = R = 35.9 Ω

b. when total current = 2 A, then total voltage  =  V = 71.8 V

c.the current through resistor of resistance 56Ω = I₁ = 1.28 A  

  the current through resistor of resistance 100Ω = I₂ = 0.72 A

Explanation:

a)

Resistors can be connected in series or in parallel. For series combination Resultant resistance of the circuit is given by

R = R₁ + R₂ + R₃ +...........+Rₙ

But is our case as shown in the picture, Both the resistors are connected in parallel and for parallel combination resultant, resultant resistance of the circuit is given by

(1 / R) = (1 / R₁) + (1 / R₂) + (1 / R₃) +.......+ (1 / Rₙ)

So

1 / R = (1 / R₁) + (1 / R₂)

Let

R₁ = 56Ω and R₂ = 100Ω

1 / R = 1/56 + 1/100

1 / R = 39 / 1400

R = 1400 / 39

R = 35.9 Ω

b)

Part b can be solved by Ohm's Law Which is stated as "The current flowing through a circuit is directly proportional to the potential difference across its ends provided the physical state such as temperature of the conductor (circuit) does not change."

Mathematically

V ∝ I

V = IR

Where V is the potential difference across the ends of the conductor and I is the Current flowing through the circuit. R is the resistance of the circuit.

Given data:

Total current = I = 2 A

Resistance = R = 35.9 Ω

Voltage = ?

By Ohm's Law

V = IR

V = 2*35.9

V = 71.8 V

c)

To solve current through each resistor, We can use current division formula which is given as

I₁ = I[ R₂ / (R₁ + R₂) ]

I₂ = I[ R₁ / (R₁ + R₂) ]

Also we can take Voltage across each resistor equal to V = 71.8 V because Potential difference across each resistors connected in parallel remain same . And by using Ohm's law divide the value of potential difference with the value of respective resistor to find the current through each resistors.

By Ohm's Law

V = IR

I = V / R

I₁ = 71.8 / 56

I₁ = 1.28 A

I₂ = V / R

I₂ = 71.8 / 100

I₂ = 0.72 A

Learn more about Resistors and Ohm's law from

https://brainly.in/question/9744300

#learnwithBrainly

7 0
3 years ago
When a person wearing a helmet rides a bicycle, the helmet experiences which type of friction?
vodomira [7]

Answer:

B

Explanation:

3 0
3 years ago
Read 2 more answers
Name the spectrum of radiations that includes both microwaves and infrared radiation.
Alona [7]

Answer:

light

Explanation:

Light is part of a spectrum of electromagnetic energy that includes radio waves, microwaves, infrared radiation, visible light, ultraviolet "light", x rays, and gamma rays.

6 0
2 years ago
The direction of the net electric force that acts on an electric charge at every point of an equipotential surface created by ot
Radda [10]

The direction of the net electric force that acts on an electric charge at every point of an equipotential surface created by other charges must be perpendicular to the surface.

A surface with an equipotential potential is one where all points on the surface have the same electric potential. This means that at every point on the equipotential surface, a charge will have the same potential energy.

The repulsive or attractive interaction between any two charged bodies is called as an electric force. Similar to any force, its impact and effects on the given body are described by Newton's laws of motion. The electric force is among the list of other forces that exert over objects.

On an equipotential surface , the potential difference between any two points is zero. So , the work done by the electric field on a test charge moving on the surface will be zero. Therefore , the electric field must be perpendicular to the surface at every point . Hence electric force must have the same direction , that is perpendicular to the surface.

To learn more about equipotential surface here

brainly.com/question/14908372

#SPJ4

8 0
11 months ago
A tennis player tosses a tennis ball straight up and then catches it after 2.00 seconds at the same height as the point of relea
Marina CMI [18]

Answer:

a) While in flight, the acceleration is 9.8 m/s² downward.

b) The velocity of the ball when it reaches its maximum height is 0.

c) The initial velocity of the ball is 9.8 m/s.

d) The maximum height the ball reaches is 4.9 m.

Explanation:

The equations for the height and velocity of the ball are as follows:

y = y0 + v0 · t +1/2 · g · t²

v = v0 + g · t

Where:

y = height at time t

y0 = initial position

v0 = initial velocity

t = time

g = acceleration due to gravity (-9.8 m/s² considering the upward direction as positive)

v = velocity at time t

a) Since the only force acting on the ball is the gravity (neglecting air resistance), while in flight, the acceleration will be 9.8 m/s² downward.

b) The velocity of the ball at maximum height is 0, because, in that moment, the ball does not go up nor down. Immediately after, the ball will start to fall with negative velocity.

c) We can use the equation of height to obtain v0, knowing that at t = 2 s, y = 0.

y = y0 + v0 · t +1/2 · g · t²         (y0 = 0 because the origin of the frame of reference is located at the throwing point).

0 = 0 m + v0 · 2.00 s - 1/2 · 9.80 m/s² · (2.00 s)²

0 = 2.00 s · v0 - 19. 6 m

19.6 m / 2.00 s = v0

v0 = 9.8 m/s

The initial velocity is 9.8 m/s

d) Let´s find at which time the ball reaches the maximum speed, using the equation of velocity and the fact that at max-height the velocity is 0:

v = v0 + g · t

0 = 9.8 m/s - 9.8 m/s² · t

t = 1 s

The height at t = 1 s will be:

y = y0 + v0 · t +1/2 · g · t²

y = 9.8 m/s · 1 s - 1/2 · 9.8 m/s² · (1 s)²

y = 4.9 m

The maximum height the ball reaches is 4.9 m

8 0
3 years ago
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