What is true about the electric and magnetif fields as the electromagnetic wave moves?



a The angle between them is constantly increasing

b the angle between them is decreasing

c They are parallel

d They are perpendicular (90º)

Answer:

Explanation:

The velocity of the car can be found by using the formula

[tex]v = \frac{d}{t} \\ [/tex]

d is the distance

t is the time taken

From the question we have

[tex]v = \frac{400}{16} \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

Scalar

Explanation:

A physical quantity that is completely described by its magnitude; examples of scalars are volume, density, speed, energy, mass, and time. Other quantities, such as force and velocity, have both magnitude and direction and are called vectors.

Answer:

Acceleration, a = 0.04 m/s²

Explanation:

Given the following data;

Force = 60N

Mass = 1500kg

Force is given by the multiplication of mass and acceleration.

Mathematically, Force is;

[tex] F = ma[/tex]

Where;

F represents force.

m represents the mass of an object.

a represents acceleration.

Making acceleration (a) the subject, we have;

[tex]Acceleration (a) = \frac{F}{m}[/tex]

Substituting into the equation;

[tex]Acceleration (a) = \frac{60}{1500}[/tex]

Acceleration, a = 0.04 m/s²

Answer: initial velocity in y direction

Explanation: coz i did dis before XD

Answer: A covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms. 

Hope that helps! :)

Answer: 10 meters

Explanation:

Divide 200 by 20, for 20 seconds.

200 ÷ 20 = 10

The answer to the question is 10.

Answer:

ANSWER

Initial Velocity (u) = 10 m/sec

Acceleration (a) = 5 m/sec

2

Distance (s) = 30 m

Final velocity (v) = ??

Using Newton's Third law of Motion,

v

2

=u

2

+2as

v

2

=10

2

+2×5×30

v

2

=100+300

v

2

=400

v =

400

v = 20 m/sec

_____________________________

ANSWER =

FINAL VELOCITY = 20 m/sec

Answered By

toppr

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Explanation:

it's easy

Answer:

7200 m

Explanation:

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

Time (t) = 30 mins

Speed (S) = 4 m/s

Distance (d) =.?

Next, we shall convert 30 mins to seconds. This can be obtained as follow:

1 mins = 60 s

Therefore,

30 mins = 30 mins × 60 s / 1 mins

30 mins = 1800 s

Thus, 30 mins is equivalent to 1800 s.

Finally, we shall determine the difference between Manu's house and his school by calculating the distance. This is illustrated below:

Time (t) = 1800 s

Speed (S) = 4 m/s

Distance (d) =.?

Speed = Distance /time

4 = Distance /1800

Cross multiply

Distance = 4 × 1800

Distance = 7200 m

Therefore, the difference between Manu's house and his school is 7200 m

Answer:

Explanation:

To understand this, we need to reflect back to the law of motion, the first law to be précised.

It states that "A body will continue to be at rest or uniform/constant motion unless acted upon by an external force which is greater than the current force"  

So we can see that since the person continues to apply the same force at the same speed, the effect on the mover will be the same.

Answer:

it's when the water in water in plants is evaporated and turned into water vapor

Explanation:

hope it helps

Answer:

V = 61.74m/s

Explanation:

Given the following data;

Acceleration due to gravity = 9.8m/s²

Time, t = 6.3 secs

Since it's a free fall, initial velocity = 0

Thus, to find the final velocity, we would use the first equation of motion;

[tex] V = U + at[/tex]

Substituting into the equation, we have;

[tex] V = 0 + 9.8 * 6.3[/tex]

V = 61.74m/s

Therefore, the final velocity is 61.74m/s

Answer:

What is the net force on the runner below if the

applied force is + 40 N and the resistive force is -2

N?

Explanation:

What is the net force on the runner below if the

applied force is + 40 N and the resistive force is -2

N?

Answer:

f=m×a

f=2.1×3

f=6.3

f=ma

6.3=12.1a

a=0.52m/s²

Answer:

78.02 V

Explanation:

Given that,

Primary voltage in a transformer is 120 V

No of windings in the primary coil is 100

No of windings in the secondary coil is 65

We need to find the outgoing voltage of the transformer. For a transformer, the ratio of primary voltage to the secondary voltage is equal to the ratio of turns in Primary coil to the turns in secondary coil are equal. So,

[tex]\dfrac{V_p}{V_s}=\dfrac{N_p}{N_s}\\\\\dfrac{120}{V_s}=\dfrac{100}{65}\\\\V_s=\dfrac{120\times 65}{100}\\\\V_s=78\ V[/tex]

So, out of the given options, the correct one is option (d) i.e. 78.02 V

Answer:

The value is [tex]s = 110.32 \ m[/tex]

Explanation:

From the question we are told that

   The initial velocity is  u=  46.5 m/s

Generally from kinematic equations we have that

     [tex]v^2 = u^2 + 2as[/tex]

Here  [tex]a = -g = -9.8 \ m/s^2[/tex]

   The negative sign is because it is moving against gravity

At maximum height v =  0 m/s        

So

     [tex]0 = (46.5)^2 + 2* (-9.8)s[/tex]

=>   [tex]s = 110.32 \ m[/tex]

Amphibians retain a set of gills their whole lives that help them to breathe in the water. So, the correct option is D.

Amphibians are defined as the class of cold-blooded vertebrates which is made up of frogs, toads, salamanders, newts, and caecilians. All amphibians that spend part of their lives in water and part of their lives on land.

Amphibians are born with gills, and some outgrow them when they become adults while others retain them for their entire lives.

Thus, the correct option is D.

Learn more about Amphibians, here:

https://brainly.com/question/14213726

#SPJ1

Answer: 300 m/m

Explanation: 5.00 m/s • 60 =300/m/m

Answer:

The magnitude of the total acceleration of the train is approximately 1.909 meters per square second.

The direction of total acceleration with respect to radial acceleration is approximately -24.578º.

Please note that negative sign indicates that train is decelerating.

Explanation:

From Physics, we know that magnitude of the acceleration experimented by the train ([tex]a[/tex]), measured in meters per square second, while rounding the bend is the Pythagorean identity involving radial and tangential accelerations ([tex]a_{r}[/tex], [tex]a_{t}[/tex]), measured in meters per square second:

[tex]a = \sqrt{a_{t}^{2}+a_{r}^{2}}[/tex] (Eq. 1)

If we assuming that train decelerates at constant rate, then each component is determined by following expressions:

[tex]a_{t} = \frac{v_{f}-v_{o}}{t}[/tex] (Eq. 2)

[tex]a_{r} = \frac{v_{f}^{2}}{R}[/tex] (Eq. 3)

Where:

[tex]v_{o}[/tex], [tex]v_{f}[/tex] - Initial and final speeds, measured in meters per second.

[tex]t[/tex] - Deceleration time, measured in seconds.

[tex]R[/tex] - Bend radius, measured in meters.

If we know that [tex]v_{o} = 27.778\,\frac{m}{s}[/tex], [tex]v_{f} = 16.667\,\frac{m}{s}[/tex], [tex]t = 14\,s[/tex] and [tex]R = 160\,m[/tex], then each acceleration component is calculated:

[tex]a_{t} = \frac{16.667\,\frac{m}{s}-27.778\,\frac{m}{s} }{14\,s}[/tex]

[tex]a_{t} = -0.794\,\frac{m}{s^{2}}[/tex]

[tex]a_{r} = \frac{\left(16.667\,\frac{m}{s} \right)^{2}}{160\,m}[/tex]

[tex]a_{r} = 1.736\,\frac{m}{s^{2}}[/tex]

Then, the magnitude of the total acceleration of the train is:

[tex]a = \sqrt{\left(-0.794\,\frac{m}{s^{2}} \right)^{2}+\left(1.736\,\frac{m}{s^{2}} \right)^{2}}[/tex]

[tex]a \approx 1.909\,\frac{m}{s^{2}}[/tex]

The magnitude of the total acceleration of the train is approximately 1.909 meters per square second.

After that, we obtain the angle of acceleration by using the following trigonometric expression:

[tex]\theta = \tan^{-1} \frac{a_{t}}{a_{n}}[/tex] (Eq. 4)

Where [tex]\theta[/tex] is the direction of total acceleration with respect to radial acceleration, measured in sexagesimal degrees.

If we get that [tex]a_{t} = -0.794\,\frac{m}{s^{2}}[/tex] and [tex]a_{r} = 1.736\,\frac{m}{s^{2}}[/tex], the direction of total acceleration experimented by the train is:

[tex]\theta = \tan^{-1}\left(\frac{-0.794\,\frac{m}{s^{2}} }{1.736\,\frac{m}{s^{2}} } \right)[/tex]

[tex]\theta \approx -24.578^{\circ}[/tex]

Please note that negative sign indicates that train is decelerating.

The direction of total acceleration with respect to radial acceleration is approximately -24.578º.

Answer:

The speed of the plane relative to the man is 245.1 m/s

The direction of the plane is S 88.36⁰ W

Explanation:

Given;

velocity of the man toward the airplane, Vy = 7 m/s

velocity of the airplane, Vx = 245 m/s west

The speed of the plane relative to man is given by;

<----------------------

                          ↑

                          ↑

                          ↑

Complete this diagram to form a right angled triangle, with the hypotenuse as the relative velocity of the plan with respect to the man.

R² = 245² + 7²

R² = 60074

R = √60074

R = 245.1 m/s

The direction of the plane is given by;

tan θ = 245 / 7

tan θ = 35

θ = tan ⁻¹ (35)

θ = 88.36°

The direction of the plane is S 88.36⁰ W

Answer:

I'm pretty sure it's D

Explanation:

because the greater the mass, the greater the gravitational pull is on it. but you probably shouldn't take my word on it, lol

Answer: B, remains constant.

Answer:

545432344455555322 we 45year 7of and

Answer:

A.  The angle between the force and displacement is 180°.

Answer:

a

Explanation:

Answer:

0.240 g/cm3

Explanation:

Answer:

bedrock?

Explanation:

The ground is in the way.

Answer: 8.82 N

Fg= (1.5) (9.8) = 14.7

Fk= (0.60) (14.7) = 8.82

Answer:

5,600

Explanation:

You split x10^15 into x10^12 and x10^3. Our new equation is 5.6x10^3x10^12

We do 5.6x10^3 and we get 5,600. Our new equation is 5,600x10^12. I hope this answered your question.