1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
disa [49]
3 years ago
8

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).

You might be interested in
a fire truck drives 3 miles to the east, then 1.2 miles to the west.what is the displacement of the fire truck
blagie [28]
Then he is 1.8 miles west
6 0
3 years ago
Using the formula 1/2 (m x v2), what is the kinetic energy of a 4 kg rock falling through the air at 5 m/s
aivan3 [116]

Answer:

KE = 50J

Explanation:

KE = \frac{1}{2}mv^{2} \\\\ KE = \frac{1}{2}(4)(5)^{2} \\\\ KE = 2(25) \\\\ KE = 50J

5 0
3 years ago
Assume you have a rocket in Earth orbit and want to go to Mars. The required change in velocity is ΔV≈9.6km/s . There are two op
Nostrana [21]

Answer: Part 1: Propellant Fraction (MR) = 8.76

Part 2: Propellant Fraction (MR) = 1.63

Explanation: The Ideal Rocket Equation is given by:

Δv = v_{ex}.ln(\frac{m_{f}}{m_{e}} )

Where:

v_{ex} is relationship between exhaust velocity and specific impulse

\frac{m_{f}}{m_{e}} is the porpellant fraction, also written as MR.

The relationship v_{ex} is: v_{ex} = g_{0}.Isp

To determine the fraction:

Δv = v_{ex}.ln(\frac{m_{f}}{m_{e}} )

ln(MR) = \frac{v}{v_{ex}}

Knowing that change in velocity is Δv = 9.6km/s and g_{0} = 9.81m/s²

<u>Note:</u> Velocity and gravity have different measures, so to cancel them out, transform km in m by multiplying velocity by 10³.

<u />

<u>Part 1</u>: Isp = 450s

ln(MR) = \frac{v}{v_{ex}}

ln(MR) = \frac{9.6.10^{3}}{9.81.450}

ln (MR) = 2.17

MR = e^{2.17}

MR = 8.76

<u>Part 2:</u> Isp = 2000s

ln(MR) = \frac{v}{v_{ex}}

ln (MR) = \frac{9.6.10^{3}}{9.81.2.10^{3}}

ln (MR) = 0.49

MR = e^{0.49}

MR = 1.63

8 0
3 years ago
What is the purpose of the rorschach test
krok68 [10]

Answer:

to examine a person's personality characteristics and emotional functioning

Explanation:

The Rorschach test is a psychological test in which subjects' perceptions of inkblots are recorded and then analyzed using psychological interpretation, complex algorithms, or both. Some psychologists use this test to examine a person's personality characteristics and emotional functioning.

4 0
3 years ago
The work of Niels Bohr relied on the assumption that: Select the correct answer below: an electron should continuously spiral in
Mars2501 [29]

Answer:

the electron only emits electromagnetic radiation when it descends to a lower-energy orbit

Explanation:

5 0
3 years ago
Other questions:
  • The pattern of repeating properties of elements revealed in the periodic table is known as the (Blank)
    15·2 answers
  • A Gaussian surface in the shape of a right circular cylinder with end caps has a radius of 12.5 cm and a length of 112 cm. Throu
    10·1 answer
  • How is perfume formed?
    13·1 answer
  • A PERT chart
    11·1 answer
  • For the sun, which is the final step in core fusion?
    13·1 answer
  • Problem 12: A 20.0-m tall hollow aluminum flagpole is equivalent in strength to a solid cylinder 4.00 cm in diameter. A strong w
    6·1 answer
  • The Theory of General Relativity, proposed by Albert Einstein, has given scientists a way to
    12·1 answer
  • Consider a 75.5-kg man standing on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximu
    10·1 answer
  • If soap bubble shows strong colors due to interference of the light that reflects from the inner and outer boundaries of the thi
    7·1 answer
  • 2 red and 2 blue overlapping balls in the center are surrounded by a green, fuzzy, circular cloud with a white line running thro
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!