Please answer D in the image with an explanation

Answer:

Explanation:

This is true because the definition of work is the parallel force required to move an object times the distance it moves. If it doesn't move, no work has been done. That is not to say that no energy has been expended, because it most certainly has! But that is not the same thing.

Answer:

43.4 N (newton)

Answer:

I dont know hehe

Explanation:

Sakit na ulo ko.

Answer:

Explanation:

According to the laws of reflection,

→ Angle of reflection : Angle of which light rays reflect off surface.

→ Angle of incidence : Angle at which light rays strikes the surface.

Answer: reflection

Explanation:

Answer: 2.0

Explanation: I KNOW !

Answer:

the amount of energy needed to raise the temperature of the iron is 90 J.

Explanation:

Given;

mass of the iron, m = 2 g

initial temperature, t₁ = 20⁰ C

final temperature, t₂ = 120⁰ C

specific heat capacity of iron, c = 0.45 J/g⁰C

The amount of energy needed to raise the temperature of the iron is calculated as follows;

H = mcΔt

H = mc(t₂ - t₁)

H = 2 x 0.45 x (120 - 20)

H = 90 J

Therefore, the amount of energy needed to raise the temperature of the iron is 90 J.

Answer:

It's nitrogen. Specifically, this is the alpha emission of an N-15 isotope.

Answer:

120v 120v 120v 120v 120v

Answer:

d

Explanation:

atoms exits everywhere

Answer: The correct choices to this question are, "B. Atoms are smaller than quarks," and "D. Atoms only exist on earth." Hope this helped.

Explanation:

1. Given,

Diameter of the round pan = 8in

Radius of the round pan = 8/2 = 4in

Height of the round pan = 2in

Therefore,

Volume of the round pan

[tex]\pi {r}^{2} h[/tex]

[tex] = 3.14 \times 4in \times 4in \times 2in[/tex]

[tex] = 100.48 {in}^{3} [/tex]

When rounded to nearest tenth,

[tex] = 100.5 {in}^{3} (ans)[/tex]

2. Given,

Dimensions of the rectangular pan = 12in, 8in, 2in

Therefore,

Volume of the rectangular pan = breadth × height × length

= 12in × 8in × 2in

[tex] = 192 {in}^{3} [/tex]

When rounded to nearest tenth,

[tex] = 192.00 {in}^{3} [/tex]

[tex] = 192.0 \: or \: 192 {in}^{3} [/tex]

3. Volume of round pan

[tex] = {100.5in}^{3} [/tex]

Volume of Rectangular pan

[tex] = 192 {in}^{3} [/tex]

Hence,

Their difference of volume will be ,

[tex] = (192 - 100.5) {in}^{3} [/tex]

[tex] = 91.5 {in}^{3} (ans)[/tex]

4. In this case we must know either the mass of the cake or its volume.

Given the case that we know the mass of the cake, it would be:

price = x * 0.2

where x is the mass of the cake in ounces, that is to say if for example a cake has a mass of 10 ounces, it would be:

price = 10 * 0.2 = 2

which means that each cake costs $ 2

Given the case of the volume, we must first multiply the density by this volume in order to calculate the mass and finally the price.

price = x * 0.454 * 0.2

where x is the volume of the cake in cubic inches, if for example the volume is 10 cubic inches it would be:

price = 10 * 0.454 * 0.2 = 0.908

which means that each cake costs $ 0.9

Answer:

force

Explanation:

Force is a push or a pull of an object that causes the object to speed up, slow down, or stay in one place. In other words, a force is what causes an object to move. Friction and gravity are two types of forces that influence how an object moves.

Answer:

Explanation:

Eustachian tube is located in between the middle ear and the nasopharynx.It's function is to control the pressure within the middle making it equal to the air pressure outside the body.

Answer:

Explanation:

Now

Look at it this way. This box is in equilibrium... Meaning forces around balanced out.

Now...

The Earth's pull on it is 98N

What Minimum external forces is needed to pick this up....

Now... The Minimum Force is 98N

Why?

Since This Box is under the influence of gravity...

Gravity is acting as a resistance

If you apply a force less than 98N... Let's say 50N on this box... It won't budge because your applied force is less than the resisting force on it(98N).

So We need a force ≥98. So the least force is 98N. Nothing below this will move the Box

Answer 98N.

Answer:

See image

Explanation:

Plato

Answer:The true statements about generators would be :

They convert motion energy to electric energy

           They use the relative motion of a magnet and a coil of wire.

Explanation:

Generators use the energy of the rotating coil in relative motion with magnets to induce a current within the wire. Generators are devices that convert energy into a voltage by the relative motion of the magnet and a coil that changes flux.

Answer :

Answer:

Thus, the angle of reflection is 15 degrees.

Explanation:

Angle of incidence, i = 15 degrees

The angle of incidence is the angle between the normal to the mirror and the incident ray, the angle of reflection is the angle between the reflected ray and the normal to the mirror.

According to the laws of reflection, the angle of incidence is equal to the angle of reflection.

Thus, the angle of reflection = angle of incidence = 15 degrees

Answer:

[tex]\theta_i = 23^o[/tex]

Explanation:

The refractive index of a medium is given by the following formula:

[tex]\eta = \frac{Sin\theta_i}{Sin\theta_r}[/tex]

where,

η = refractive index = 1.5

[tex]\theta_i[/tex] = angle of incidence = ?

[tex]\theta_r[/tex] = angle of refraction = 15°

Therefore,

[tex]1.5 = \frac{Sin\theta_i}{Sin15^o}\\\\Sin\theta_i=(1.5)Sin15^o\\\\\theta_i = Sin^{-1}(0.388)\\\\[/tex]

[tex]\theta_i = 23^o[/tex]

Answer:

no

Explanation:

Answer:

Explanation:

[tex]KE=\frac{1}{2}mv^2[/tex] and we are solving for KE:

[tex]KE=\frac{1}{2}(20)(8)^2[/tex] which gives us that

KE = 640 J, choice C.

Answer:

Spring constant, k = 8740.89 N/m

Explanation:

Given the following data;

Potential energy = 4.2 J

Extension, e = 3.1 cm to meters = 3.1/100 = 0.031 m

To find the spring constant;

Mathematically, the potential energy stored in a spring is given by the formula;

[tex] P.E = \frac {1}{2}Kx^{2} [/tex]

Where;

P.E is potential energy.

K is the spring constant.

x is the extension of the spring.

Substituting into the equation, we have;

[tex] 4.2 = \frac {1}{2}*k*0.031^{2} [/tex]

Cross-multiplying, we have;

[tex] 8.4 = k*0.000961 [/tex]

[tex] k = \frac {8.4}{0.000961} [/tex]

Spring constant, k = 8740.89 N/m

Answer:

Explanation:

Answer:

what a fat bear I love physics

Answer:

E.) Sound Waves are an example of longitudinal waves.

Explanation:

I was sure either A or E was correct so I had to look it up. In reference to three sources, it is proven that sound waves are longitudinal. Therefore, without a doubt, I would try to go with E. I know D is wrong as well as B most definitely. That is because sound always requires a medium to travel through in order to be heard; additionally sounds don't necessarily have to be a certain rate of loudness in order to be considered of different quality. Therefore leaving you with A, C, or E. Additionally C is a false fact as well. So I highly suggest choosing E because there is sufficient sources to prove that. I'll provide a direct link down below.

https://www.bing.com/search?q=are+sound+waves+longitudinal+waves&cvid=fc17d9f3f744496da334cf10a7daad57&aqs=edge..69i57l2j69i60j5j69i61j69i60l2.5395j0j1&pglt=2339&FORM=ANNTA1&PC=NMTS

The correct statement is sound waves are an example of longitudinal waves.

In a longitudinal wave, the particles are displaced parallel to the direction the wave travels. An example of longitudinal waves is compressions moving along a slinky. We can make a horizontal longitudinal wave by pushing and pulling the slinky horizontally.

Sound is a longitudinal wave that alternately compresses and decompresses the component particles of the medium through which it travels.

Learn more about longitudinal waves here https://brainly.com/question/6663687

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I don't see any free body diagrams.

Free body diagram of a moon orbits a planet in a nearly circular orbit of radius R, as shown in the figure is attached in the answer. This could be used to analyze the forces exerted on the moon when it is at the position indicated in the figure.

Free-body diagrams are used to display the relative strength and direction of all forces that are being applied to an item in a certain scenario. A unique illustration of the vector diagrams that were covered in a previous lesson is the free-body diagram. We will make use of these graphics throughout our study of physics. In a free-body diagram, the size of the arrow indicates the strength of the force.

The force is acting in the direction indicated by the arrow's direction. The exact type of force is labelled next to each force arrow in the diagram. In a free-body diagram, it is common practice to depict the item as a box and to draw the force arrow from the box's center outward in the direction that the force is acting.

Learn more about free body diagram here:

https://brainly.com/question/10148657

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Answer:

When displacement is zero, the particle may be at rest, therefore, distance travelled = 0.

Again, when displacement is zero, the final position matches with the initial position after some time, but the distance travelled will not be zero.

Answer:

E

Explanation:

Answer:

D. Dylan is incorrect because a 90-degree launch angle results in the largest vertical range​

Explanation:

Projectile is the motion of an object thrown into space. When an object is thrown into space, the only force which acts on it is the acceleration due to gravity.

An object thrown into space would reach maximum height (vertical range) if it is launched at an angle of 90 degrees. For maximum horizontal range, the object needs to be launched at an angle of 45 degrees.

Therefore Dylan is incorrect because a 90-degree launch angle results in the largest vertical range​

The correct statement is

D. Dylan is incorrect because a 90-degree launch angle results in the largest vertical range​

It is the object motion that should be thrown into space. At the time when the object is thrown into space, the only force that should act on it represent the acceleration because of gravity.

Since object thrown into space should have to reach maximum height in the case when it is launched the 90 degrees angle. Due to the above reasons, option D is considered.

Learn more about the degree here: https://brainly.com/question/2836651

Answer: [tex](a)10.812\ m/s\ (b)\ 0.75\ m/s\ \text{left}[/tex]

Explanation:

Given

Mass of hockey puck [tex]m=0.160\ kg[/tex]

Initial velocity of hockey puck is [tex]u=3\ m/s[/tex]

First a horizontal force of [tex]25\ N[/tex] is applied to the right for [tex]0.05\ s[/tex]

acceleration associated with it is

[tex]\Rightarrow a=\dfrac{25}{0.160}\\\\\Rightarrow a=156.5\ m/s^2[/tex]

Using equation of motion i.e.

[tex]\Rightarrow v=u+at\\\Rightarrow v=3+156.25\times 0.05\\\Rightarrow v=3+7.812\\\Rightarrow v=10.812\ m/s[/tex]

(b) When a force of [tex]12\ N[/tex] is applied for 0.05s

Using equation of motion i.e.

[tex]\Rightarrow v=3-\dfrac{12}{0.160}\times 0.05\\\\\Rightarrow v=3-75\times 0.05\\\Rightarrow v=3-3.75\\\Rightarrow v=-0.75\ m/s\\\Rightarrow v=0.75\ \text{towards left}[/tex]

Answer:(of a reaction or process) accompanied by the release of heat.

Explanation: trust moi