5. In the image below, the focus lines are shown. What can be done to bring the apple into focus?
A. Make the lens rounder.
B. Make the lens flatter.
C. Move the apple farther from the eye.
D. Nothing should be done because the apple is already in focus.

Answer:

See below

Explanation:

It is a lot of stop and go....various speeds and accelerations .

Answer:

1 and 3

Explanation:

1 and 3  

Increasing coils increases strength

   COOLING the wire would increase current flow and strength of magnet

Adding an iron core will definitely increase the strength of the electromagnet

(1) Increasing the number of coils (✔)

The acceleration of the car is calculated as 10 m/s.

The acceleration is the rate of change of velocity with time. Given that;

s = ut + 1/2 at^2

Assuming that the motion started from rest, u = 0 m/s

s = 1/2 at^2

2000 = 0.5 * a * (20)^2

a = 2000/ 0.5 *  (20)^2

a = 10 m/s^2

2) The time taken to reach the maximum height is gotten from;

v=u+at

0=20+(−10)t

t=2s

Then time taken to reach the maximum height;

s = ut + 1/2 at^2

s = 20(2)+0.5(−10)(2)^2

s = 20m

The maximum height is therefore 45 m thus;

45=0+0.5(10)(t)^2

t = 3s

Total time= 3+2= 5s

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acceleration = a

1000 = u(30) + 0.5a(30)²

1000 = 30u + 450a

velocity after covering 1 km = u + 30a

1000= (u+30a) (20) + 0.5a (20)²

1000= 20u + 800a

u = 35a

putting the value of u in above equation

so, a = 2/3

2. refer to the above attachment

To make the solute dissolve, thoroughly mix and add a little quantity of solvent after transferring the solute to a container

A solute is a material dissolved in another substance known as a solvent in a homogeneous mixture made of two or more components.

A solute's concentration in a solution is a measure of how much of that solute is dissolved in the solvent and the amount of solvent present, such as salt. Solutes are the best cleaning agents and additives.

Add a little quantity of solvent after transferring the solute to a container ideally a volumetric flask,

Which most precisely measures the volume of the solution indicated on the flask. To make the solute dissolve, thoroughly mix.

Hence the above process should be followed to dissolve, and thoroughly mix.

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scalars: distance, speed, time

vectors: displacement, velocity, acceleration

The body's mass and velocity are multiplied to create momentum. It happens as a result of the force used. Kg m/s² is its unit. Measurement of mass in motion is momentum.

The body's mass and velocity are multiplied to create momentum. It happens as a result of the applied force and has the unit Kg-m/s².

Equal amounts of force and momentum are applied. More quantitative than the first rule of motion, the second law of motion is usually used to describe what happens when a force is applied.

The momentum is found as;

P =mv

Where m is the mass in kilogram

v is the velocity in m/sec

P is the momentum in the kg-m/s²

The second law of motion is more quantitative, and it is frequently used to quantify what occurs when a force is applied. The second law of Newton is discussed in depth in this article.

Force and the rate of change of momentum are equal. The force is given as the product of mass and change of velocity. The impulsive force is given by the change in momentum.

I=ΔP

Hence, the body's mass and velocity are multiplied to create momentum.

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Answer:

Given - M = 20 kg

k = 0.4

F = 200 N

To find - acceleration

Solution -

F= kMA

200 = 0.4 * 20 * acceleration

200 = 8 * a

a = 8/200

a = 0.04 m s²

Answer:A or totalitarianism

Explanation: Totalitarianism is an authoritarian form of government in which the ruling party recognizes no limitations whatsoever on its power, including in its citizens' lives or rights

Some characteristics of totalitarianism:

Rule by a single party.

Total control of the military.

Total control over means of communication (such as newspapers, propaganda, etc…)

Police control with the use of terror as a control tactic.

Control of the economy.

Explanation: A) half wave rectifier

B) Full wave rectifier :

1) central tapped

2) bridge rectifier

i hope this was helpful to you

The velocity of the particle moving along the straight line at any time, t is determined as v = 4t³/3 - 2t + C.

The velocity of an object is the rate of change of displacement with time. It is also the integral of acceleration of the object.

a = 4t² - 2

v = ∫a

v = 4t³/3 - 2t + C

Thus, the velocity of the particle moving along the straight line at any time, t is determined as v = 4t³/3 - 2t + C.

Complete question:

A particle moves along a straight line such that its acceleration is a=(4t^2-2). Find its velocity at any time, t.

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It can be expected in this city that the hours of sunshine will significantly increase after the month of July

The monthly hours of sunshine in the city is the average of daily sunshine in a month.

The trend as seen on th graph shows that monthly hours of sunshine is maximum between the months of December and January. Afterwards the monthly sunshine hours decreases.

Therefore, it can be expected in this city that the hours of sunshine will significantly increase after the month of July.

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Answer:

[tex]\huge\boxed{50g}[/tex]

Definition:

Half-life- The time taken for half of the radioactive isotopes to decay.

Explanation:

How does radioactive decay work? Radioactive decay is a process by which unstable nuclei become more stable through the emission of alpha or beta particles or gamma rays.

Since a half-life is the time taken for half of the isotopes to decay, we can simply divide the initial mass of 100 grams by 2; this gives us 50 grams.

1) Divide 100g by 2.

[tex]\frac{100g}{2}=50g[/tex]

Answer:

[tex]\fbox {F: +3C, G: +3C}[/tex]

Explanation:

When two conducting spheres come in contact, their charges will become the mean of their charges. This takes place by the transfer of charges from the greater charged sphere to the lesser charged one.

Then :

⇒ F + G / 2

⇒ -14 + 20 / 2

⇒ 6/2

⇒ 3C

∴ Hence, both sphere F and sphere G will have a charge of +3 C.

When the forces are said to be balance, it means that net force is zero.

When two or more forces are acting on the system of objects, then the to attain equilibrium, net force must be zero.

The resultant of all the forces in horizontal and vertical direction is zero, when the forces are balanced.

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The portions of Earth's fresh water are located in lakes and streams.  The options A and D are correct.

The freshwater is the one which does not contains any harmful chemical and saltiness.

The oceans contains salt water and the lakes and the streams have fresh water.

So, the option A and D are correct.

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Answer:

450 ML

Explanation:

Given:

Volume of gas sample: 550 mL Pressure: 1.8 atm plus 2.2 atm

To find:

The new volume of the gas after the pressure increases to 2.2 atm.

___

steps

⇒ [tex]V_1P_1=V_2P_2[/tex]

⇒ [tex](550\text{ml})(1.8\text{atm})[/tex]

⇒ [tex]=(x)(2.2\text{atm})[/tex]

⇒ [tex]x=\frac{(550)(1.8)}{2.2}[/tex]

⇒ [tex]x=450\text{ml}[/tex]

Answer:

V₂ = 450 mL

Explanation:

Because you are dealing solely with pressure and volume, you can use Boyle's Law to find the missing value. The equation looks like this:

P₁V₁ = P₂V₂

In this formula, "P₁" and "V₁" represent the initial pressure and volume. "P₂" and "V₂" represent the final pressure and volume. You have been given values for all of the variables except for "V₂". Thus, you can substitute the given values into the equation and simplify to find the answer. The final answer should have 2 sig figs to match the given values.

P₁ = 1.8 atm                      V₁ = 550 mL

P₂ = 2.2 atm                     V₂ = ?

P₁V₁ = P₂V₂                                               <----- Boyle's Law equation

(1.8 atm)(550 mL) = (2.2 atm)V₂              <----- Plug given values in

990 = (2.2 atm)V₂                                    <----- Multiply 1.8 and 550

450 = V₂                                                  <----- Divide both sides by 2.2

The speed of the ball after one second is obtained as 9.8 m/s.

We know that  since the ball dropped from a height, its initial velocity is zero.

Thus we have;

u = 0 m/s

v = ???

g =  9,8 m/s²

t =  1sec

Given that;

v = u + at

v = at

v =  9,8 m/s² *  1sec

v = 9.8 m/s

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pluto is best decribed as smallest planet

Answer:

Your answer is right

Answer:

-1400 m/s^2

Explanation:

Change in velocity / change in time  = a

    -  70 / .05 =  -1400 m/s^2

The formula for the energy in a capacitor , u in terms of q and c is q²/2c

The energy of a capacitor u = 1/2qv where

Also, the capacitance of a capacitor c = q/v where

So, v = q/c

Substituting v into u, we have

u = 1/2qv

= 1/2q(q/c)

= q²/2c

So, the formula for the energy in a capacitor , u in terms of q and c is q²/2c

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Answer:

C

Explanation:

velocity is a vector unit, meaning it isn't scalar so also gives direction, same as distance vs. displacement.

Dry ice is cold, extremely cold. Ice has a surface temperature of -109.8 degrees Fahrenheit or -78.5 degrees Celsius (197.85 Kelvins).

hence, Ice has a surface temperature of -109.8 degrees Fahrenheit

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Answer:

Convex mirrors produce only virtual images, and concave mirrors produce real and virtual images

Answer:

covex Miros produce different thing like micronizamm and other things

The work done on the filled bucket in raising out of the hole is 2, 925 Joules

Using the formula:

Work done = force * distance

Note that force = mass * acceleration

F = mg + ma

F = 4. 5 * 10 + 28 * 10

F = 45 + 280

F = 325 Newton

Distance = 9m

Substitute into formula

Work done = 325 * 9

Work done = 2, 925 Joules

Therefore, the work done is 2, 925 Joules

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Considering the Doppler efect, the frequency heard by the student would change if:

The Doppler effect is defined as the change in the apparent frequency of a wave produced by the relative motion of the source with respect to its observer. In other words, this effect is the change in the perceived frequency of any wave motion when the sender and receiver, or observer, move relative to each other.

The following expression is considered the general case of the Doppler effect:

[tex]f'=f\frac{v+-vR}{v-+vE}[/tex]

Where:

In summary, the Doppler Effect is an alteration of the observed frequency of a sound due to the movement of the source or the observer, that is, they are changes in the frequency and wavelength of a wave due to the relative movement between the wave source and the observer.

In this case, considering the Doppler effect, the frequency heard by the student would change if:

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Considering the Doppler efect, the frequency heard by the student would change if:

The Doppler effect is defined as the change in the apparent frequency of a wave produced by the relative motion of the source with respect to its observer. In other words, this effect is the change in the perceived frequency of any wave motion when the sender and receiver, or observer, move relative to each other.

In summary,  there is always a change in the frequency of sound as the source of the sound moves towards or away from the observer. So, the Doppler Effect is an alteration of the observed frequency of a sound due to the movement of the source or the observer, that is, they are changes in the frequency and wavelength of a wave due to the relative movement between the wave source and the observer.

In this case, considering the Doppler effect, the frequency heard by the student would change if:

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They cannot be divided and still keep the properties of the element true about all of these atoms. Option D is corect.

The atom consists of matter that may be split without releasing electrical charges.

It's also the smallest unit of matter with chemical element features. As a result, the atom is the fundamental unit of science.

In the nucleus proton and the neutron is exists. The condition of the atom to be electrically neutral is that the number of the proton and electron should be the same.

They cannot be separated while still maintaining the element's characteristics for each and every one of these atoms.

Hence, option D is corect.

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Answer:

The correct answer is d, they cannot be divided and still keep the properties of the element.

Explanation:

You're welcome :)