Which form of electromagnetic light can be used for cooking food?


A) X-rays
B) Ultra-violet (UV) light
C) Gamma Rays
D) Microwaves

Answer:

14715J

Explanation:

Ep = mgh

given that ,

m = 150kg

h =10

g = 9.81 m/s^2

Ep = 150 × 10 × 9.81

Ep= 14715J

Answer:

entergy is measured by weight mass and height

Explanation:

Voltage = current x resistance

Voltage = 40 x 20 = 800 volts

Answer:

800v

Explanation:

v=IR

where V =Voltage,

I= Current

R= Resistance

V= 40x20

800v

Answer:

Optical fibers are used most often as a means to transmit light between the two ends of the fiber and find wide usage in fiber-optic communications, where they permit transmission over longer distances and at higher bandwidths (data rates) than wire cables.

Explanation:

Answer:

D

Explanation:

Answer:

The acceleration of textbook is downward at the slowest rate.

(a) is correct option.

Explanation:

Given that,

The object is accelerating downward at the slowest rate.

(a). a textbook falling onto the surface of the moon

(b). a flower pot that has been pushed out a window

(c). a pebble falling off a cliff through the air

(d). a baseball thrown from third base to first base

We know that,

Acceleration :

Acceleration is the product of mass of object and gravity.

[tex]a=mg[/tex]

We need to find the accelerating downward at the slowest rate

According to given data,

Acceleration depends upon weight and gravity.

We have some example of free fall.

(b), (c) and (d) are the example of free fall.

In which the gravity is same.

But in option (a) textbook falling onto the surface of the moon

We know that,

The gravity on the moon is less than the earth.

So, we can say that the acceleration of textbook is downward at the slowest rate.

Hence, The acceleration of textbook is downward at the slowest rate.

(a) is correct option.

By knowing that the total charge must remain constant, we will see that:

c)

d)

If these are conductor spheres, we can assume that the charge flows through the spheres.

So, when two touches, the charge tries to equilibrate.

When sphere B and sphere C touch, the total charge between them would be equally distributed between the two spheres.

Charge B = -8.0 C

Charge C = +9.0 C

Total = -8.0 C + 9.0 C = 1.0 C

half of that is 0.5 C

Then now both sphere B and sphere C will have 2.5C each.

And sphere A still has the -4.0 C

Then the total of the 3 spheres is:

0.5C + 0.5C - 4.0C = -3.0C

The total charge never changes in a closed system, remember that.

D) Similar to before, this time the total charge will be equally distributed among the 3 spheres.

The total charge is -3.0C

So:

And the total charge will be:

-1.0 C + -1.0 C + -1.0 C = -3.0C

If you want to learn more about charge conservation, you can read:

https://brainly.com/question/166559

Answer: A or B?

Explanation: its either those 2

Answer:

D

Explanation:

The correct answer would be option D.

Gallium (Ga) , germanium (Ge) , selenium (Se) , and arsenic (AS) all belong to the same group of elements referred to as the transition elements. The transition elements have partially-filled d orbital, a feature that confers some characteristic properties on the elements or their ions. These properties include:

Answer:

The distance by which the child is safe is  [tex]k = 10 \ m[/tex]

Explanation:

From the question we are told that

  The speed of the motorcycle is  [tex]v_n = 30 m/s[/tex]

   The distance of the child from the motorcycle is L =  190 m

    The reaction time is  [tex]t_r = 1 \ s[/tex]

    deceleration is  [tex]a = -3m/s^2[/tex]

Generally the distance covered during the reaction time is  

    [tex]D = v_n * t_r[/tex]

=>[tex]D = 30 * 1[/tex]

=> [tex]D = 30 \ m[/tex]

Generally the distance covered during the deceleration

     [tex]v^2 = u^2 + 2as[/tex]

Here v is the final velocity which is  zero  

So

   [tex]0 = 30 ^2 + 2 * (-3)s[/tex]

=> [tex]s = 150 \ m[/tex]

So the total distance the motorcycle rider will cover before coming to rest is  

     [tex]d = D + s[/tex]

=>   [tex]d = 30 + 150[/tex]

=>  [tex]d = 180 \ m[/tex]

Therefore the amount of distance by which the child id safe is  

    [tex]k = L -d[/tex]

=> [tex]k = 190 -180[/tex]

=>  [tex]k = 10 \ m[/tex]

Answer: B

Explanation:

Due to the rubbing of the balloons on their hair, the balloons have gained negative charges which lie on the balloons surfaces. Like charges will repel each other according to the Coulomb force

Answer:

D) A car requires more applied force to move on wet pavement

Explanation:

The coefficient of friction determines the frictional force that the ground applies on the car .

Maximum force of friction generated = μ R where μ is coefficient of friction and R is reaction force of the ground

Reaction force of the ground = mg or weight of the car . Since weight is same on dry and wet ground so normal force will be same is both the case .

Force of friction generated in respect of dry pavement will be more because of greater coefficient of friction .

Friction force helps in driving a car in forward direction hence it is easy to drive car on dry pavement . On wet pavement , it will slip off at the same place rather than move forward .

Answer:

A

Explanation:

D is non-metal, gas, insulator

C is also non-metal, insulator

B is a metalloid, semiconductor, still have low melting point

A is a metal, solid, good conductor, have high melting point.

Answer:

This is Hard

Explanation:

I recommend  asking a teacher for help

The induced current will increase if we move the magnet twice as fast.

We know that an induced current is produced by a changing magnetic field. The greater the speed of the magnet, the greater the magnitude of the current so we can conclude that the induced current will increase if we move the magnet twice as fast.

Learn more about current here: https://brainly.com/question/24858512

Answer:

The induced current will increase.

Explanation:

Answer:

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

[tex]a = \frac{f}{m} \\ [/tex]

where

f is the force

m is the mass

From the question

f = 140 N

m = 70 kg

We have

[tex]a = \frac{140}{70} = \frac{14}{7} \\ [/tex]

We have the final answer as

Hope this helps you

Explanation:

Forgive me If I am wrong, it's been a while since I've studied Torque.

The formula for the angular momentum is

momentum= I*w.

We can also write I*W as 1/2MR^2 * W so the extra mass coming from the block of clay would most likely cause the angular momentum to increase from the amount it was before.

The angular momentum of the system before and after the clay sticks will be the same.

The principle of conservation of angular momentum states that the total angular momentum is always conserved.

Li = Lf

Iiωi = Ifωf

where;

Thus, the angular momentum of the system before and after the clay sticks will be the same.

Learn more about angular momentum here: https://brainly.com/question/7538238

Answer:

[tex]a=0.8\ m/s^2[/tex]

Explanation:

Given that,

Mass of a toy, m = 0.62 kg

Horizontal force, F = 16.3 N

Force on the opposite direction, F' = 15.8 N

We need to find the acceleration of the toy.

Here, two forces are acting in opposite direction, the net force will be the difference of forces.

Net force = 16.3 N-15.8 N

=0.5 N

The formula for net force is given by :

F = ma

a is the acceleration of the toy

[tex]a=\dfrac{F}{m}\\\\a=\dfrac{0.5\ N}{0.62\ kg}\\\\a=0.8\ m/s^2[/tex]

So, the acceleration of the toy is [tex]0.8\ m/s^2[/tex].

In physics, tension is described as the pulling force transmitted axially by the means of a string, a cable, chain, or similar object, or by each end of a rod, truss member, or similar three-dimensional object.

According to the question, the formula we use in this method is F = ma as we have to find the acceleration.

Therefore, the formula for the acceleration is

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

[tex]a= \frac{0.5}{0.62}[/tex]

Hence, after the calculation, the acceleration is 0.8m/s.

For more information, refer to the link:-

https://brainly.com/question/12550364

Answer:

size of the medium

Explanation:

Answer:

Explanation:

To find the volume of the object we use the formula

volume of object = final volume of water - initial volume of water

From the question

final volume of water = 86 mL

initial volume of water = 75 mL

So we have

volume of object = 86 - 75

We have the final answer as

Hope this helps you

Answer:

Force in the Direction of Displacement. The work done by a constant force is proportional to the force applied times the displacement of the object

Answer:

If you are meaning to say 214 the answer is 12840 minutes

Explanation:

Answer:

how?

Explanation:

The given length of the inclined plane of 1.6 m. inclined at 30° to the horizontal, and point mass velocity of 5 m/s gives;

Length of the inclined plane = 1.6 m

Angle of inclination of the plane = 30°

Speed of the point mass = 5 m/s

1. Height of the top of P above ground, h is found as follows;

h = 1.6 m × sin(30°) = 0.8 m

The equation of motion that can be used is; h = u•t - 0.5•g•t^2

Which gives;

0.8 = 5•t - 0.5×9.81×t^2

0 = 5•t - 4.905×t^2 - 0.8

t = 0.199, or t = 0.821

2. At the top, we have;

Horizontal velocity, vx = 0.5 × cos(30°)

Which gives;

Horizontal velocity, vx = 0.433 m/s

The distance traveled, x is found as follows;

= 0.433 m/s × 0.199 s = 0.086 m

3. The position of point C is therefore;

C(0.086 + 1.6 × cos(30°), 0)

C(1.472, 0)

Therefore;

Learn more about the equations of motion here:

https://brainly.com/question/24714911

Answer:

Option B

Explanation:

Answers:

Note: The map doesn't mention "England", but instead it shows "United Kingdom". They are different but related concepts. I'll treat them as the same for the sake of simplicity.

====================================================

Explanation:

Since we're not talking about points, but rather large areas/countries, this means that an absolute single location doesn't make much sense.

However, we can try to go for the middle-most part of the country if possible.

Spain's northernmost and southernmost boundaries are between the 30° and 45° latitude lines in the northern hemisphere. The country appears to be closer to 45° N rather than 30° N. A good estimate is maybe something like 42° N. Though like I said, there's going to be wiggle room here depending which point you use as the representative point of Spain. The larger the country, the more variation in possible answers.

At the same time, much of Spain appears to be between the Prime Meridian and the longitude line 15° W. I'll split the difference and get (0+15)/2 = 15/2 = 7.5 = 8.

Therefore, one estimate of Spain's absolute GPS location is 42° N and 8° W

The other countries are handled in a similar fashion.

Answer:

Because

Explanation:

5he force is not fundamental physical unit

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question

mass = 2.4 g

volume = 6 cm³

We have

[tex]density = \frac{2.4}{6} \\ [/tex]

We have the final answer as

Hope this helps you