a(n) ______ travels at the speed of light

Answer:

a)  B = 0.9375 T  -z, b)      B = 1.54 T

Explication

a) The magnetic force is

         F = q v x B

         f = q v B sin θ

bold indicates vectors

For direction let's use the right hand rule.

If the charge is positive

the flea in the direction of velocity, toward + x

the fingers extended in the direction of B

the palm the direction of the force + and

therefore the magnetic field goes in the direction of -z

           F = q v B

           2.25 10-16 = 1.6 10-19  1.50 103 B

           B = 2.25 10-16 / 2.4 10-16

           B = 0.9375 T  -z

b) now an electron

thumb speed direction, -z

opposite side of palm force + y

therefore the direction of the magnetic field is + x

            B = F / qv

            B = 8.5 10-16 / 1.16 10-19 4.75 103

             B = 1.54 T

Explanation:

when soil builds up over time in the location

Answer:

669.1 ft and 743.1 ft

Explanation:

Given data

Lenght of wire= = 1000ft

Angle =  42˚

Applying SOH CAH TOA

1. How tall is the tower?

SOH

sine ∅= opp/hyp

sin 42= opp/1000

0.6691= Opp/1000

0.6691*1000= Opp

Opp=669.1 ft

Applying SOH CAH TOA

2.How far away from the base of the tower does the wire hit the ground?

CAH

cos ∅= adj/hyp

cos 42= adj/1000

0.7431*1000=adj

adj=743.1 ft

Answer: 34 N

Explanation:

Given

The body moved 2.25 m in 3 sec with the help of propulsion force.

Mass of body m=68 kg

Using the equation of motion

[tex]s=ut+\frac{1}{2}at^2\\\\2.25=0+\frac{1}{2}a\cdot 3^2\\\\a=0.5\ m/s^2[/tex]

Force is given by the product of mass and acceleration

[tex]F=m\times a\\F=68\times 0.5\\F=34\ N[/tex]

Answer:

L = 3.51

Explanation:

Pendulum equation is T = 2pi[tex]\sqrt{L/9.81}[/tex]

T = 1.5 and we are solving for L

1.5=2[tex]\pi \sqrt{L/9.81}[/tex]

square both sides to get 2.25 = 2[tex]\pi ( L/9.81)[/tex]

multiply both sides by 9.81 then divide by 2 and 3.14 as a substitue for pi. The answer should be about 3.51 in length

L = 3.51

If this helps, mark me brainliest pls

Answer:

E = 1.711 MeV

Explanation:

From the law of the conservation of energy:

[tex]K.E_{e}+K.E_p + E_{e}+E_{p} = 2 E[/tex]

where,

[tex]K.E_e=K.Ep=[/tex] the kinetic energy of positron and electron = 1.2 MeV

[tex]E_e=E_p =[/tex] Rest energy of the electron and the positron = 0.511 MeV

E = Energy of Photon = ?

Therefore,

[tex]1.2\ MeV + 1.2\ MeV + 0.511\ MeV + 0.511\ MeV = 2E\\\\E = \frac{3.422\ MeV}{2}\\\\[/tex]

E = 1.711 MeV

Answer:

Electric field intensity is a Vector Field. Electric field intensity (E, N/C or V/m) is a vector field that quantifies the force experienced by a charged particle due to the influence of charge not associated with that particle

Explanation:

Answer:

3.46 A

Explanation:

electrical power = current × voltage

P = I × V

We have,

V = 7.8

P = 27

Thus, I  = P ÷ V

I = 27 / 7.8

= 3.46 A

Answer: [tex]0.00636\ rad/s^2[/tex]

Explanation:

Given

CD has a playing time of [tex]t=74\ min\ or\ 74\times 60\ s[/tex]

Initial angular speed of CD is [tex]480\ rpm[/tex]

Final angular speed of DC is [tex]210\ rpm[/tex]

Angular speed, when rpm is given

[tex]\omega =\dfrac{2\pi N}{60}[/tex]

[tex]\omega_i=\dfrac{2\pi \times 480}{60}\\\\\Rightarrow \omega_i=16\pi \ rad/s[/tex]

Final speed

[tex]\Rightarrow \omega_f=\dfrac{2\pi \times 210}{60}\\\\\Rightarrow \omega_f=7\pi \ rad/s[/tex]

Using equation of angular motion

[tex]\Rightarrow \omega_f=\omega_i+\alpha t[/tex]

Insert the values

[tex]\Rightarrow 7\pi =16\pi +\alpha \times 74\times 60\\\Rightarrow -9\pi =\alpha \cdot (4440)\\\\\Rightarrow \alpha=-\dfrac{9\pi}{4440}\\\\\Rightarrow \alpha=-0.00636\ rad/s^2[/tex]

Magnitude of angular acceleration is [tex]0.00636\ rad/s^2[/tex]

Answer:

In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes.

Explanation:

Answer:

(1) By increasing the number of loops of wire around the iron core

(2) increasing the current or voltage.

Answer:

Solid cylinder

Explanation:

because hollow may blow and just bounce

Answer:

Rug burn, Indian burn done to you by a friend, friction from the road causes your car to accelerate at a slower rate, The cylinder heads in an engine, When trying to move a heavy object across a rough surface

Explanation:

Answer:

Answer:

gravity

Explanation:

I don't know what the explanations would be

Answer:

8 m/s to the left.

Explanation:

Applying,

V = d/t...................... Equation 1

Where V = Velocity of the car, d = distance, t = time

From the question,

Given: d = 24 meters, t = 3 seconds

Substitute these values into equation 1

V = 24/3

V = 8 m/s to the left.

Hence the velocity of the car is 8 m/s to the left.

Answer:

B. 2 hours

Explanation:

45 miles an hour times 2 is 90 miles in 2 hours

Answer:

B. 2 Hours

Explanation:

If your going at a constant speed of 45 miles per hour then, it will take two hours because 45x2 is 90. and if you divided 90 and 45, you will get 2.

Answer:

M = 1.90 Kg

Explanation:

Given data: mass = 2.5 Kg

radius R = 0.8 m

angular velocity ω = 1.5 rad/s

Angular momentum L =0.5×Iω^2

Where, I  is the moment of inertia of the spinning disc.

I = 0.5MR^2

I = 0.5×2.5×0.8^2

I = 0.8 Kg/m^2

Then L = 0.5×0.8×1.5^2 = 0.8×2.25 = 0.9 Kg-m^2/sec

Let unknown mass be M

New mass of disc = (2.5+M) Kg, R = 0.8 m

New I = 0.5(2.5+M)(0.8)^2

Since, angular momentum is conserved

Angular momentum before = angular momentum after

0.5×0.5(2.5+M)(0.8)^2×(1.13)^2 = 0.9

Solving for M we get

0.204304(2.5+M)=0.9

M = 1.90 Kg

Answer:

closed parallel circuit

Answer:

Explanation:

The law is about how object will be deformed when certain amount force is  applied. Elastic limit is a point where object will not return its previous shape after being deformed

Answer:

using ohm's law I=3/12

I=250ma.

Answer:

Waxing Gibbous phase occurs when the Moon is mostly lit and the illuminated portion is egg-shaped (gibbous) with the eastern edge shaded. The amount of illuminated area visible is increasing from one day to the next which is what is meant by "waxing"

hope this helps

have a good day :)

Explanation:

Answer:

Hey mate.......

Explanation:

This is ur answer....

Waxing Gibbous phase occurs when the Moon is mostly lit and the illuminated portion is egg-shaped (gibbous) with the eastern edge shaded. The amount of illuminated area visible is increasing from one day to the next which is what is meant by "waxing".

Hope it helps!

Brainliest pls!

Follow me! ;)

Solution :

Given the laser light which is sent through the double slit produces an interference pattern on the screen placed 3  meters from the slits.

The 8th order maximum occurs at angle = 12

So,

[tex]$8^{th} \text{ order maxima} = d \sin \theta = m \lambda$[/tex]      , m = 8

[tex]$d = \frac{8 \lambda}{\sin 12}$[/tex]

[tex]$\frac{\lambda}{d}= \frac{\sin 12}{8}$[/tex]

[tex]$3^{rd} \text{ order maxima}= d \sin \theta_2 = m_2 \lambda$[/tex]

[tex]$\sin \theta_2 = \frac{m_2 \lambda}{d}=\frac{3 \lambda}{d}$[/tex] [tex]$=0.75\ {\sin 12}$[/tex]

[tex]$\theta_2 = \sin^{-1}\left(0.75\ \sin 12\right)$[/tex]

   [tex]$ = \sin^{-1}\left(0.155)$[/tex]

   [tex]$=8.91^\circ$[/tex]

Answer:

I think it's B. Sound Waves

Answer:

ΔV = 0.98 L

Explanation:

First, we will calculate the increased volume using Charles' Law:

[tex]\frac{V_1}{T_1} = \frac{V_2}{T_2}[/tex]

where,

V₁ =initial volume = 18.9 L

V₂ = final volume = ?

T₁ = initial temperature = 15°C + 273 = 288 k

T₂ = final temperature = 30°C + 273 = 303 k

Therefore,

[tex]\frac{18.9\ L}{288\ k} = \frac{V_2}{303\ k}[/tex]

V₂ = 19.88 L

Now, we calculate the change in volume:

ΔV = V₂ - V₁ =  19.88L - 18.9 L

ΔV = 0.98 L

This is the volume of gasoline that will spill out.

Answer:

2 m/s²

Explanation:

From the question given above, the following data were obtained:

Initial velocity (u) = 0 m/s

Final velocity (v) = 12 m/s

Time (t) = 6 s

Acceleration (a) =?

The acceleration of the player can be obtained as follow:

v = u + at

12 = 0 + (a × 6)

12 = 6a

Divide both side by 6

a = 12 / 6

a = 2 m/s²

Thus, the acceleration of the player is 2 m/s²

Answer:

Electromagnetic waves to travel in a straight line. Light only deviates from a straight line when the medium it is travelling through changes density. This is called refraction. Light does not deviate when travelling through a homogeneous medium, which has the same refractive index throughout. Wikipe