to learn to apply the concept of current density and microscopic ohm's law. a slab of metal of volume v is made into a rod of length l. the rod carries current i when the electric field inside is e.

Answer:

The answer iis true

Explanation:

It is much easier to carry your backpack when it is empty rather than when it's full of textbooks (or soaked from the rain).

The power dissipated by the resistor will be = 4 watt.

Electric energy is characterized by means of present day or the drift of electric fee and voltage or the potential of rate to deliver power. A given price of strength may be produced by means of any combination of current and voltage values.

Electric strength measures the rate of electrical energy switch through an electric circuit according to unit of time and measured the usage of the SI unit of energy that is watt or one joule in step with. Electric powered energy is generally supplied by electric powered batteries and produced by way of electric mills.

voltage =  3.0 v

power = 1.o w

power = V²/R

            = 3*3/R

R = 9/1 = 9 Ω

voltage =  6.0 v

Resistance =  9 Ω

power = V²/R

           = 6*6/9 =9 Ω  =  4 watt

Power dissipated = 4 watt

The power dissipation through the resistance is calculated by substituting the value of the resistance and the voltage. The value of the resistance is same as the first case.

Learn more about battery  here:-https://brainly.com/question/14883923

#SPJ4

The normal force acting on you is 847.5 Newtons.

To calculate the normal force acting on you, we need to consider the force balance in the vertical direction. When the elevator accelerates downwards, the net force acting on you is the difference between your weight (mg) and the normal force (N):

Net force = mg - N

the acceleration is downward (negative), we can write the equation of motion as:

ma = mg - N

Solving for the normal force:

N = mg - ma

Substituting the given values:

m = 75 kg (mass)

a = -1.5 m/s² (acceleration)

g = 9.8 m/s² (acceleration due to gravity)

N = (75 kg)(9.8 m/s²) - (75 kg)(-1.5 m/s²)

N = 735 N + 112.5 N

N = 847.5 N

Therefore, the normal force acting on you is 847.5 Newtons.

learn more about "force ":- https://brainly.com/question/12785175

#SPJ11

Answer:

(c) 250

Explanation:

We can start by analyzing the horizontal and vertical motion of the ball separately. Since the ball is projected horizontally, its initial vertical velocity is 0.

Horizontal motion:

Initial horizontal velocity (Vx) = distance/time = 1 km / 4 s = 250 m/s

Final horizontal velocity (Vx) = same as initial velocity, since there is no horizontal acceleration

Vertical motion:

Initial vertical velocity (Vy) = 0

Vertical acceleration (a) = -9.8 m/s^2 (assuming downward direction as negative)

Time of flight (t) = 4 s

Final vertical velocity (Vy) = Vy + a*t = -9.8 m/s^2 * 4 s = -39.2 m/s

Vertical displacement (h) = Vyt + 0.5at^2 = 0 + 0.5(-9.8 m/s^2)*(4 s)^2 = -78.4 m (negative because the ball is falling below the initial height)

Now, we can use the Pythagorean theorem to find the height of the cliff:

h^2 + d^2 = (78.4 m)^2

h^2 + (1000 m)^2 = (78.4 m)^2

h^2 = (78.4 m)^2 - (1000 m)^2

h^2 = 61344 m^2

h = sqrt(61344 m^2) = 248 m

Therefore, the height of the cliff is approximately 248 m. The closest option is (c) 250.

Answer:

The magnitude of the emf induced in the loop is 2.4 × 10⁻⁵ V

Explanation:

The magnitude of the induced emf of a loop moving relative to a wire is given as follows;

The given parameters are;

I = 50 A, a = 50 cm, and b = 6.0 cm

The constant rate of change of x, v = 20 cm/s

Motional emf formula

The magnetic field due to the straight wire, B = μ₀·i/(2·π·x)

The flux given by the rectangular loop, Ф = BA =  μ₀·i/(2·π·x) × a × b

Therefore, we get;

\(e = \dfrac{-d\phi}{dt} = \dfrac{-\mu_0 \cdot i \cdot a\cdot b}{2 \cdot \pi} \times \dfrac{d}{dt} \left (\dfrac{1}{x} \right ) = \dfrac{-\mu_0 \cdot i \cdot a\cdot b}{2 \cdot \pi} \times \left (\dfrac{1}{x^2} \right ) \dfrac{dx}{dt}\)

\(\because \dfrac{dx}{dt} = v\)

Therefore;

\(e = \dfrac{-\mu_0 \cdot i \cdot a\cdot b}{2 \cdot \pi} \times \left (\dfrac{1}{x^2} \right ) \dfrac{dx}{dt} = \dfrac{-\mu_0 \cdot i \cdot a\cdot b}{2 \cdot \pi} \times \left (\dfrac{1}{x^2} \right ) \times v \left(\because \dfrac{dx}{dt} = v \right)\)

μ₀ = 4·π × 10⁻⁷ H/m

We get;

\(e = \dfrac{4\cdot \pi \times 10^{-7} \, H/m\times50 \, A \times 0.5 \, m\times 0.06 \, m}{2 \cdot \pi} \times \left (\dfrac{1}{(0.05 \, m)^2} \right ) \times 0.2 \ m/s = 2.4 \times 10^{-5} \, V\)

The induced emf, e = 2.4 × 10⁻⁵ V

Answer:

Plants and animals that live in a biome must be able to live and reproduce in the conditions

Explanation:

Answer:

We can use Coulomb's law to solve this problem:

F = k * q1 * q2 / r^2

where F is the force between the two charges, k is Coulomb's constant (k = 9 x 10^9 N m^2 / C^2), q1 and q2 are the magnitudes of the charges, and r is the distance between them.

We know the force F, the distance r, and the magnitude of one of the charges q1. We can rearrange the equation to solve for the magnitude of the other charge q2:

q2 = F * r^2 / (k * q1)

Substituting the values we have:

q2 = (250 N) * (0.15 m)^2 / (9 x 10^9 N m^2 / C^2 * 6.5 x 10^-5 C)

Simplifying:

q2 = 8.65 x 10^5 C

Therefore, the magnitude of the other charge is 8.65 x 10^5 C.

The Taylor's relationship for strain hardening of metallic materials is given as follows: σ = Kε^n where σ is the stress, ε is the strain, K is the strength coefficient, and n is the strain-hardening exponent.

The Taylor's relationship for strain hardening of metallic materials is given as follows: σ = Kε^n where σ is the stress, ε is the strain, K is the strength coefficient, and n is the strain-hardening exponent. The equation is used to describe the behavior of metals that undergo plastic deformation. Taylor's relationship is also known as the power law relationship.

A strain-hardening curve can be plotted using this equation. It is possible to calculate the strength coefficient and the strain-hardening exponent from the curve.

The strength coefficient and strain-hardening exponent are material properties that describe the material's behavior under plastic deformation.

However, they are related to the material's microstructure and can be used to predict the material's behavior under different loading conditions.

Learn more about Metals at https://brainly.com/question/29404080

#SPJ11

Answer:

Height: Weight: Your BMI is , indicating your weight is in the category for adults of your height. For your height, a healthy weight range would be from to pounds....

Explanation:

The electric field strength at a distance of 1.20 m on the x-axis is -1.5 × 10⁴ N/C.

To find the electric field strength at a distance 1.20 m on the x-axis, we can use Coulomb's law:

\($$F=k\frac{q_1q_2}{r^2}$$\)

where F is the force between two charges, q1 and q2 are the magnitudes of the charges, r is the distance between the charges, and k is the Coulomb constant.For a single point charge q located at the origin of the x-axis, the electric field E at a distance r is given by:

\($$E=\frac{kq}{r^2}$$\)  where k is the Coulomb constant.

So, let's calculate the electric field due to each charge separately and then add them up:

For the +2.0 C charge at x = 0, the electric field at a distance of 1.20 m is:\($$E_1=\frac{kq_1}{r^2}=\frac{(9\times10^9)(2.0)}{(1.2)^2}N/C$$\)

For the -3.0 C charge at x = 0.40 m, the electric field at a distance of 1.20 m is:

\($$E_2=\frac{kq_2}{r^2}\)

\(=\frac{(9\times10^9)(-3.0)}{(1.20-0.40)^2}N/C$$\)

The negative sign indicates that the direction of the electric field is opposite to that of the positive charge at x = 0.

To find the net electric field, we add the two electric fields\(:$$E_{net}=E_1+E_2$$\)

Substituting the values of E1 and E2:

\($$E_{net}=\frac{(9\times10^9)(2.0)}{(1.2)^2}-\frac{(9\times10^9)(3.0)}{(0.8)^2}N/C$$E\)

net comes out to be -1.5×10⁴ N/C.

Therefore, the electric field strength at a distance of 1.20 m on the x-axis is -1.5 × 10⁴ N/C.

Know more about  electric field   here:

https://brainly.com/question/19878202

#SPJ8

Answer: summer and greater than 66°N

Explanation:

Summer is the most appropriate season in which the sun does not set. It is a typical situation for the Arctic Circle. It is the latitude in which the sun does not set in the day and typically during the month of July. The north of this circle is a period of sunshine which last for a period of about six months in the North Pole. Summer never rises in the winter solstice (December).

Answer:

I = 12.12 A

Explanation:

P = 2.5 kw = 2500 w

formula

\(P=I^{2} R\)

\(I=\sqrt{\frac{p}{R} } =\sqrt{\frac{1500}{17} } =\sqrt{147.06} =12.12 amp\)

Hope this helps

Answer:

there is no list of "the following" you might want to re-upload your question.

Answer:

a. Magnetic field is a location of a vector field around an electric current or magnet formed due to moving electric charges, or magnetic material and has a magnetic effect and exerts a force on other magnetic materials, electric current, and electric charges. The Earth's magnetic field that has the effect of turning a compass needle is an example of a magnetic field

b. The number of turns of the coil, N, in Diagram 1.1 > The number of turns of the coil, N, in Diagram 1.2

The pattern of the iron filings in Diagram 1.1 are closer with less space in between than the pattern of iron filings in Diagram 1.2

The angle of deflection of the ammeter pointer in Diagram 1.1 will be > The angle of deflection of the ammeter pointer in Diagram 1.2, given that the number of turns and current are inversely proportional

c. i. The pattern of the iron filings will have rings which are more closely arranged to each other as the strength of the magnetic field is increased

ii. As the number of turns is increased, the magnetic field is increased

Explanation:

Answer:

ytyug

Explanation:

Answer: D

Explanation:

Complete Question:

What is the power in a circuit that has a current of 12 amps and a resistance of 100 ohms?

Answer:

D. 14,400 watts

Explanation:

The electrical power of an electric circuit can be defined as a measure of the rate at which energy is either produced or absorbed in the circuit.

Mathematically, electrical power is given by the formula;

\( Electrical \; power = current * voltage \)

This ultimately implies that, the quantity (current times voltage ) is electrical power and it is measured (S.I units) in Watt (W).

Given the following data;

To find the power in the circuit, we would use the following formula;

Power = I²R

Where;

Power = 12² * 100

Power = 144 * 100

Power = 144,000 Watts

Answer:

Explanation:

operantly conditioned; positively reinforced

When the distance between two point charges is increased by a factor of 2, the force they exert on each other decreases to 1/4 of the original force. The relation is governed by the Coulomb's Law.

According to Coulomb's Law, the force between two point charges is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. In this scenario, if the distance between the charges is increased by a factor of 2, it means that the new distance is twice the original distance.

Since the force is inversely proportional to the square of the distance, doubling the distance will result in the force becoming 1/4 of the original force. Mathematically, this can be represented as follows:

\(F' = F / (2^2)\)

\(F' = F / 4\)

Therefore, the force between the two charges will become 1/4 (or 25%) of the original force when the distance between them is increased by a factor of 2.

Learn more about Coulomb's Law here.

https://brainly.com/question/506926

#SPJ11

Answer:

Correct Choice: c)

Explanation:

When an object is launched with an angle with respect to the horizontal, it describes a curved path exclusively under the action of gravity.

The velocity at any point of the path has two components:

The horizontal component has a constant value because no acceleration acts in that direction.

The vertical component has a variable value that depends on the acceleration of gravity and the time.

When the golfer drives the golf ball in a high arcing shot it reaches a maximum height and then returns to the ground.

a) The velocity is never zero until the ball hits the ground. The acceleration is never zero. False

b) The x-velocity is constant and equal to the horizontal component of the initial velocity. The y-velocity is zero at the highest point. Only one condition is true, thus the whole statement is False.

c) The x-velocity is never zero, and the y-velocity is zero as explained above. True

d) The velocity is non-zero, and the acceleration is not zero. False

Its velocity as well as acceleration are both non-zero.

As a result, the aforementioned response is correct.

Learn more about velocity here:

https://brainly.com/question/14352334

Answer:

W = F * s    

Work done equals applied force * distance traveled

Apparent weight = M g (1 - sin θ)     since some of applied force will lighten sled

μ = coefficient of kinetic friction

F cos θ = force applied to motion of sled

s = distance traveled

[μ M g (1 - sin θ)] cos θ * s = work done in moving sled

Note that F = μ M g    if applied force is in the horizontal direction

The item has no energy at its greatest point since all of it's kinetic energy has been transformed into potential energy; as a result, the velocity is null and the object is not accelerating.

The best engine in the cosmos is the speed of light. A study that was earlier this month published in the scientific journal Nature revealed that it was an illusion.

The formula for gravitational force is P.E. Equals mgh, where g is the deceleration caused by gravity (9.8 m/s2 at the earth's surface) when h is the elevation in meters. The units for gravitational potential energy are kg m2/s2, which are the same as those for kinetic energy.

To know more about velocity visit:

https://brainly.com/question/18084516

#SPJ4

Answer:

I would wanna meet juice if he was still alive ofc

Explanation:

Answer: The force of gravity depends directly upon the masses of the two objects, and inversely on the square of the distance between them. This means that the force of gravity increases with mass, but decreases with increasing distance between objects.

Explanation: Hope this helps. : )

The velocity of the car will be 36.8 m/s when it has traveled a distance of 70 cm.

The velocity at any moment in time during a particle's motion is given by instantaneous velocity, a continuous function of time. By calculating the derivative of the position function, which gives us the functional form of instantaneous velocity v, we may determine the instantaneous velocity at a certain time (t).

Velocity is a vector quantity.

SI unit is m/s.

According to the question, the Given values are :

Distance =40 cm

=0.4 meter

Velocity, v =2105.3 cm/s

=21.053 m/s

21.053=0.4/t

⇒t=0.4/21.053

t=0.019 seconds

Now, the distance is 70 cm

=0.70 meters

v=0.7/0.019

v=36.8 m/sec

Hence, the velocity will be 36.8 m/sec when it has traveled a distance of 70 cm.

To get more information about instantaneous velocity :

https://brainly.com/question/13190516

#SPJ1