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3 years ago

Which statement describes the relationship of resistance and current?

Physics

2 answers:

Len [333]3 years ago

8 0

Choices 'B'; and 'D' both begin with the correct words.
But they should end with the equation

R = V / I

kirill [66]3 years ago

8 0

Answer : Resistance is inversely proportional to current because R = V/I

Explanation :

Resistance is the property of a material which opposes the flow of electric current.

Mathematically, it can be written as:

$R=\dfrac{\rho L}{A}$

Where,

$\rho$ is the resistivity of the material.

L is the length of the wire

A is the area of the cross section

It can be also defined using Ohm's law as :

$R=\dfrac{V}{I}$

Where,

V is the voltage across the terminals of the battery

I is the current flowing in the circuit.

So, it is clear that the relation between the resistance and the current is inverse.

Hence, the correct option is (b).

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If a car is moving with a speed of 5 km/h on a highway. Find the distance travelled by the car in 2 hours?.

grin007 [14]

Answer:

Distance = 10 kilometers.

Explanation:

Given the following data;

Speed = 5km/h

Time = 2 hours

To find the distance traveled;

Distance = speed * time

Distance = 5 * 2

Distance = 10 kilometers

Therefore, the distance travelled by the car is 10 kilometers.

5 0

3 years ago

a light wave is traveling straight up out of the ocean then moves out into the air how do you expect the movement of the light w

Mariulka [41]

If the light is traveling straight up, then it hits the interface (surface
or boundary) between water and air perpendicularly (90° to the surface).

This direction is the direction of the 'normal' to the surface. So the
angle of incidence is zero, and that means the angle of refraction is
also zero. The light just keeps going in the same direction when it
emerges into the air, and is not bent.

However, its speed increases in air, and that means its wavelength
also becomes longer than it was in the water.

6 0

4 years ago

Give atleast (5) etypes of cleaning tools , equipment,supplies, and materials that you can find either in your home or school. I

ivanzaharov [21]

Answer and Explanation:

Cleaning tools, equipment, supplies, and materials that can be easily found in a school in one each are: scrub brush, sponges, buckets and brooms.

These equipments are essential to promote a clean, organized and safe environment and for this reason, they can be easily found both at school and in a home, since the cleanliness of these two places is essential for the well-being, proactivity and health of the people who attend them.

3 0

3 years ago

Calculate the solubility (in m units) of ammonia gas in water at 298 k and a partial pressure of 2.50 bar . the henry's law cons

Eduardwww [97]

Henry's Law (formulated in 1803 by William Henry) states that aa constant temperature, the amount of gas dissolved in a liquid is directly proportional to the partial pressure exerted by that gas on the liquid.
Mathematically it can be formulated as
C = H⨯P
being:
C: the molar concentration of dissolved gas A,
P: the partial pressure of it
H: Henry's constant
Substituting:
C = P * H
C = (2.50 * 0.9869) * 58.0
C = 143.1
Answer:
the solubility (in m units) is
C = 143.1

8 0

3 years ago

While skateboarding at 19 km/h throwning a tennis ball at 11 km/h what is the speed of the ball

Lina20 [59]

According to whom ?

So YOU're on your skateboard, and there's somebody else, sitting on HIS porch, watching you skate by on your board.

-- The man on the porch says you're skating by him at 19 km/hr .

-- You throw a tennis ball.

. . . . . Do you throw it in the same direction that you're skateboarding, or do you throw it away behind you, toward the place you just came from ?

. . . . . Does it fly away from YOU at 11 km/hr ? Or does it fly past the man on the porch at 11 km/hr ?

There are 4 possible combinations. One of them is not possible. Each of the other three combinations leads to two different answers to the question. And ALL six answers are correct !

1). You throw the ball forward, in the same direction you're skating. It flies away from your hand at 11 km/hr.

To you, the speed of the ball is 11 km/hr, in the direction you're skating. To the man on the porch, it's 30 km/hr, in the direction you're skating.

2). You throw the ball forward, in the same direction you're skating. It flies past the porch at 11 km/hr.

This isn't possible.

3). You throw the ball backward, toward where you just came from. It flies away from YOU at 11 km/hr.

To you, the speed of the ball is 11 km/hr, in the direction backward from you. To the man on the porch, the speed of the ball is 10 km/hr in the direction you're skating.

4). You throw the ball backward, toward where you just came from. It flies past the porch at 11 km/hr.

To you, the speed of the ball is 8 km/hr, in the direction backward from you. To the man on the porch, it's 11 km/hr in the direction you're skating.

NOW you're going to ask me "But what's the REAL speed of the ball ?"

The answer to THAT one is: There's no such thing ! It all depends on WHO's measuring it ... where that observer is and how HE's moving.

The displacement, speed, velocity, acceleration, and energy of the ball, ALL depend on who's watching it and measuring it.

I'll be interested to see whether you mark this answer 'Brainliest', or report it because it's weird, confusing, and ridiculous.

3 0

4 years ago