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The useful energy output for these light bulbs is carried to the energy stores of the environment by light waves.

The useful energy from the two light bulbs is the energy that is beneficial and consumed. This energy is said to be used to do meaningful work.

The useful energy from the two light bulbs illuminates the environment and enables us to see in the dark.

A light wave is a type of electromagnetic wave that carries light energy. This light wave carries visible light into the environment.

The light from the two lights bulbs are visible lights and thus, the useful energy output for these light bulbs is carried to the energy stores of the environment by light waves.

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Answer:

4.3

Explanation:

because 6.8 subtracted by 2.5 is 4.3

The computation of the work done is gotten by multiplying the force and distance whish will be A. 30J.

It should be noted that the formula for calculating work done is given as:

Work = Force × Distance

where,

Force = 15N

Distance = 2m

Therefore, work done will be:

= Force × Distance

= 15N × 2m

= 30 Joules.

In conclusion, the work done is 30 Joules.

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Answer:

D

Explanation:

Secondary earthquake waves is a seismic wave that can travel through solid but cannot travel through liquid and gas.

This wave is one of the fastest traveling seismic waves.

While sound wave can travel through both solid and liquid and even gas.

Therefore, the statement that compares how secondary earthquake waves and soundwaves move is:

Sound waves can move through liquids, but secondary earthquake waves cannot.

The best answer is therefore D

The current through the coffee machine is 3.48 A.

To calculate the current flowing through the coffee machine, we use the formula below.

Formula:

Where:

Make I the subject of the equation.

From the question,

Given:

Substitute these values into equation 2

Hence, The current through the coffee machine is 3.48 A.

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Answer:3.48

Explanation:

Answer:

Extrusive rocks form on the Earth's surface from lava, which is magma that has risen from underground. Intrusive rocks are formed when magma cools and solidifies within the planet's crust.

That's the difference

Answer:

s = ut + 1/2 att (that's "t" squared), where

s = distance travelled - in metres

u = initial velocity - in meres per second

a = acceleration - in metres per second squared, i.e. metres per second increase in acceleration, per second

t = time taken  - in seconds

Explanation:

Time, "t",  at a specific moment is a resolved variable, i.e. we know the value, so the equation needs to show distance "s" at that specific time "t". The basic equation is for fixed initial position (when t = 0) , where distance ,"s", = "0", fixed initial velocity, "u", ( at t = 0, s = 0 ) - which can be zero or a value, and fixed (constant) acceleration, "a", ( from t = 0, s = 0, through to t = "specific moment", s = "the answer" ) - which can be zero or a value.

Explanation:

In other to avoid a situation where their differences, pride, and personalities caused them to compete and publicly insult one another instead of working together they need to respectfully consider the viewpoints of each other, as well as assign individual roles that should be respected.

Answer:

1) Gravity and the electromagnetic force have infinite ranges while the nuclear forces have very small ranges.

Explanation:

Gravity and the electromagnetic force have infinite ranges while the nuclear forces have very small ranges.

In orbital mechanics and aerospace engineering, a gravitational slingshot is the use of the motion of a planet to alter the path and speed of an interplanetary spacecraft.

Given is to find the major division between -

Gravity and the electromagnetic force have infinite ranges while the nuclear forces have very small ranges.

Therefore, we can conclude that -

Gravity and the electromagnetic force have infinite ranges while the nuclear forces have very small ranges.

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Answer:

An airplane is flying at an airspeed of 200 miles per hour headed on a SE bearing of 140°. A north wind (from north to south) is blowing at 16.2 miles per hour, as shown in Figure 8.8.1. What are the ground speed and actual bearing of the plane?

Explanation:

plss brainlieist me

θ = 205° - 105° = 100°

[tex]\tt R=\sqrt{L^2+M^2+2LMcos\theta}\\\\R=\sqrt{303^2+555^2+2.303.555cos100}\\\\R=584.32~m[/tex]

Answer:

I got:

u

s

=

0.51

F

=

78.4

N

Explanation:

At the start the  

100

N

force is just enough to overcome static friction so we can write:

Force

=

Static Friction

F

=

μ

s

N

where  

μ

s

is the coefficient of static friction and  

N

=

Normal Reaction that in an horizontal case such this will be equal to the weight of the block, so  

N

=

m

g

.

We get:

F

=

μ

s

⋅

m

g

in numbers:

100

=

μ

s

⋅

20

⋅

9.8

μ

s

=

100

20

⋅

9.8

=

0.51

k = f/x

x = f/k

( / means divide )

The equation connecting force and the displacement  k is F= k x. From the spring constant k can be found by dividing F by x and similar to get x by dividing F by k.

Force is an external agent acting on a body to change it from the state of motion or rest. There are various kinds of force namely magnetic force, frictional force, gravitational force etc.

Force applied on a body if result in displacement of the body it is said to work done on the body. An elastic body like  a spring can be stretched or compressed by applying a force on it. Let the change in length or displacement of the elastic body be x.

Then, the force applied on it to make the displacement x is directly proportional to x.

F = k x, where k is the proportionality constant here called the spring constant.

From this the spring constant k = F/x

Similarly, if we know the force f and spring constant k, then x = F/k.

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Answer:

D, the weight

Explanation:

Normal force is mass times gravity

gravity help determines weight

Also a,b and c are all vectors and D is a scaler

Answer:

The great thing about exercise is that it’s never too soon or too late to start. Fitness can support healthy growth and development in children and reduce the risk of cognitive decline and delay the onset of dementia in older people. You don’t have to join a gym or spend lots of money on equipment to get fit.

Explanation:

Answer:

14 degrees

Explanation:

because you can divide all and find the angle to find the answer

hope it's help ty make me brainless pls

Answer:

Option A

Explanation:

An electric force is a charged reaction that causes an attraction or a repulsion between two charged objects. In this case rubbing a glass rod with wool charges up the rod which then turns it into magnetic, which attracts the paper scraps from the ground to the rod where it sticks. The best answer is option A or "Pam rubs a glass rod with wool, then moves the rod over a pile of small paper scraps. The scraps leap into the air and stick to the rod."

Hope this helps.

Answer:bro I need someone to help me with this question too what did you awser

Explanation:

A graph of KE (kinetic energy) vs the mass of an object is a line, as we know that the kinetic energy depends linearly on the mass of the object.

For an object of mass M moving with velocity v, we define its kinetic energy as:

KE = (M/2)*v^2

We can rewrite it as:

KE = (v^2/2)*M

So, it is a "coefficient" (if we assume that the velocity is constant) times the mass. That gives a linear relationship.

Then we conclude that the kinetic energy depends linearly on the mass, which means that the graph of KE vs the mass of an object is a line.

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Answer:

(a). Work done is the physical quantity which is same for both boys.

(b).Power is the physical quantity which is different for both boys.

The ratio of power of both boys is 2:1

Explanation:

Given that,

Time of boy A= 30 min

Time of boy B = 60 min

(a), We need to find the physical quantity that is same for both boys

Using given that,

We know that,

Work done depends on the force and displacement.

Here, force and displacement is same for both boys.

So, we can say that the work done will be same for both boys.

(b).  We need to find the physical quantity that is different for both boys

Using given that,

We know that,

Power is equal to the work done divided by time.

Time is different for both boys so, the power will be different for both boys.

We need to calculate the ratio of power of both boys

Using formula of power

[tex]P=\dfrac{W}{t}[/tex]

Put the value into the formula

For boy A,

[tex]P_{A}=\dfrac{W_{A}}{t_{A}}[/tex]....(I)

For boy B,

[tex]P_{B}=\dfrac{W_{B}}{t_{B}}[/tex]....(II)

From equation (I) and (II)

[tex]\dfrac{P_{A}}{P_{B}}=\dfrac{\dfrac{W}{30}}{\dfrac{W}{60}}[/tex]

[tex]\dfrac{P_{A}}{P_{B}}=\dfrac{60}{30}[/tex]

[tex]\dfrac{P_{A}}{P_{B}}=\dfrac{2}{1}[/tex]

Hence, (a). Work done is the physical quantity which is same for both boys.

(b).Power is the physical quantity which is different for both boys.

The ratio of power of both boys is 2:1

Answer:

Strong nuclear force

Explanation:

Answer:

Geothermal energy can be trapped using geothermal plants that utilizes steam escaping from the earth surface to make electricity.

The limitations include :

Explanation:

Geothermal energy originates in form of heat/steam escaping from the inner parts of the earth surface. The steam trapped is converted to electricity through turbines. The hot water pumped by heat pumps can be used to heat homes or for heating purposes in industries.

The limitations of geothermal energy are high initial capital costs for installing the systems, depletion of geothermal sites after sometime, environmental concerns due to greenhouse gases emissions and land requirements for geothermal projects.

Explanation:

When a battery is connected to a lightbulb properly, current flows through the lightbulb and makes it glow.

Answer: B

Explanation: efficiency is the useful energy supplied; useful energy supplied doesn't not change,
work done stays constant

in order to to increase the power of the motor, time would have to be decreased to get the wanted result..

When he  increases the input power to the motor and repeats the experiment, work done stays the same but time taken decreases.

The quantity of energy moved or converted per unit of time is known as power in physics. The watt, or one joule per second, is the unit of power in the International System of Units. Power is also referred to as activity in ancient writings. A scalar quantity is power.

A motor's output power is calculated by multiplying its torque output by the angular velocity of its output shaft.

To lift a load through a vertical distance of 2.0m, in the both cases same amount of work-done happens because the displacement is same.

But as the input power, in second case, increases but the efficiency of the motor does not change, the time taken decreases ( as time taken = work done/power)

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Answer:

Below!

Explanation:

Answer:the sample of solid has less energy than the sample of gas

Explanation:

Apex

Answer:

i think the answer is c if you get it wrong then it is b

Explanation:

Answer:

Your answer is: D) The book's inertia causes it to continue

Explanation:

Hope this helped : )