when an object falls, eventually the force of air resistance (drag) = the force of gravity. This is called ___

A constant magnetic field passes through a single rectangular loop whose dimensions are 0.35 m × 0.55 m. The magnetic field has

Pani-rosa [81]

Answer:

Part a)

$EMF = 0.38 V$

Part b)

$\frac{dA}{dt} = 0.43 m^2/s$

Explanation:

Part a)

Initial value of magnetic flux is given as

$\phi_1 = BAcos\theta$

$\phi_1 = (2.1)(0.35 \times 0.55) cos65$

so we have

$\phi_1 = 0.17 Wb$

Final flux through the loop is given as

$\phi_2 = 0$

now EMF is given as

$EMF = \frac{\phi_1 - \phi_2}{\Delta t}$

$EMF = \frac{0.17 - 0}{0.45}$

$EMF = 0.38 V$

Part b)

If magnetic field is constant while Area is changing

So EMF is given as

$E = Bcos65 \times \frac{dA}{dt}$

$0.38 = 2.1 cos65(\frac{dA}{dt})$

$\frac{dA}{dt} = 0.43 m^2/s$

5 0

3 years ago

Do electrons have more room to move along a thick or thin wire?

PolarNik [594]

Answer:

Got it from g00gle: Similarly, electrons flow more easily through a thick wire than they flow through a thin wire of the same material. Resistance is greater in a longer wire because the charges travel farther. As temperature increases, a metal's resistance increases because electrons collide more often.

Explanation:

3 0

3 years ago

SI

madam [21]

Answer:

p = mv

Explanation:

The momentum of a body is defined as the product of its mass and velocity. Its physical symbol is 'p'.
The formula for momentum is given by

p = mv

Where,

m - the mass of the body in kg

v - velocity of the body in m/s

Therefore, the unit of momentum is expressed as the kg m/s
The momentum of a body is always associated with its motion. It is a vector quantity and it is directed in the direction of the velocity vector.
If a body is at rest, the momentum associated with the body is zero.
The momentum plays a significant role in the kinematics of the body. As similar to the energy conservation law, the total momentum of the body is conserved.

6 0

4 years ago

A double-slit arrangement produces bright interference fringes for sodium light ( λ = 603 nm) that are angularly separated by 0.

ohaa [14]

Answer:

θ for water = 0.3684°

Explanation:

given data

wavelength λ = 603 nm

angle θ = 0.49°

index of refraction n = 1.33

to find out

angular fringe separation

solution

we know that double slit interference is here

m λ = d sin(θ) .................1

so for air it will be

m λ(air) = d sin(θ)air ...........2

and for water it will be

m λ(water) = d sin(θ)water .............3

now we take here ratio of equation 2 and 3

$\frac{\lambda (water)}{\lambda(air)}$ = $\frac{sin(\Theta)water}{sin(\Theta)air}$

and

ratio of wavelength is = $\frac{1}{n}$

ratio of wavelength = $\frac{1}{1.33}$

ratio of wavelength = 0.75187

so

sin(θ)water = sin(θ)air (0.75187)

sin(θ)water = sin(0.49) (0.75187)

sin(θ)water = 0.006429

so (θ)water is

(θ)water = 0.3683°

we notice here that by using small angle formula

we have approximate sin(θ) = θ

so θ for water is = $\frac{\Theta }{n}$

θ for water = $\frac{0.49}{1.33}$

θ for water = 0.3684°

7 0

3 years ago

As the electric potential near the ground increases during a thunderstorm, a positive charge current can move up pointed objects

cestrela7 [59]

Answer:

St. Elmo's Fire - well known to old time sailors

5 0

2 years ago

when an object falls, eventually the force of air resistance (drag) = the force of gravity. This is called ____​

when an object falls, eventually the force of air resistance (drag) = the force of gravity. This is called ____