Create a ray diagram for eyeglasses that contain a diverging lens. Assume you are looking at a 2 cm tall object that is 4 cm from the lens. The focal length is 3 cm.

Answer:

two wavelength are present

as wavelength is counted either from crest to crest or trough to trough and there are only 2

The energy stored in a capacitor is determined as  ¹/₂Q²/C.

The energy stored in a capacitor is determined from the following formulas as shown below;

U = ¹/₂Q²/C

Where;

Thus, the energy stored in a capacitor is determined as  ¹/₂Q²/C.

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From the calculations, the force required is 0.437 N.

The term force is defined a the product of mass and acceleration. The force is required to move the sling the required distance.

If mass = 0.019 kg and acceleration =  23 m/s2 then we know that F = ma

It then follows that the required force is;

F = 0.019 kg  *  23 m/s2= 0.437 N

Missing parts

You plan to use a slingshot to launch a ball that has a mass of 0.019 kg. You want the ball to accelerate straight toward your target at 23 m/s2. How much force do you need to apply to the ball?

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Answer:

C.

Explanation:

Specific heat capacity is defined as the amount of heat energy needed to increase the temperature of 1kg of a substance by 1°C.

The formula for specific heat capacity is as follows:

[tex]C = \frac{Q}{m \Delta T}[/tex]

where:
C   → specific heat capacity

Q   → heat energy required

m   → mass of the object

ΔT → change in temperature.

The net force on the cylinder depends on several independent variables such as mass, acceleration, velocity, time, etc, and it is given as F(net) = ma.

The net force on the cylinder is calculated from Newton's second law of motion.

F(net) = ma

F(net) = m(v/t)

where;

Thus, the net force on the cylinder depends on several independent variables such as mass, acceleration, velocity, time, etc, and it is given as F(net) = ma.

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Answer:

1.1111111

Explanation:

The formula for magnification (M) as already given is:

M= V/U

Where V is anything that has to do with image . such as image height or image distance And U is anything that has to do with object such as object height or object distance .

Image height (V) = 2m

Object height(U) = 1.8m

M = V/U

M= 2/1.8

M= 1.111111

Answer:

D

Explanation:

Deep sea and sea floor marine habitats would have the least access to primary producers. The correct option is (d).

Primary producers would have the least access to habitats in the deep sea and on the ocean floor. Primary producers are animals and plants that can use sunlight as an energy source to photosynthesize and make their own food, including algae and phytoplankton.

Because of the depth of the water, light penetration is constrained in the deep sea and sea floor settings, making it difficult for creatures that rely on photosynthesis to survive.

In comparison to other maritime ecosystems, where sunlight is more easily obtainable, such as coral reefs, lagoons, salt marshes, estuaries, mangroves, and intertidal zones, these habitats often have lower amounts of primary production.

Therefore, The correct option is (d) deep sea and sea floor.

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Answer:

A   C

Explanation:

F = C q1q2/r^2    means that decreasing the charge (s) or increasing distance will decrease force

A  C

Answer:

440J

Explanation:

First, let us find the weight of the barbell.

The formula to find the weight is :

W = m × g

Here,

m ⇒ mass ⇒ 20 kg

g ⇒ acceleration of gravity

Let us find it now.

W = m × g

W = 20 kg × 10 ms⁻²

W = 200N

And now let us find the work done by this weight lifter.

Work = Force × Displacement

Let us find it now.

Work = Force × Displacement

         = 200N × 2.2m

         = 440J

At any crime scene, the two greatest challenges to the physical evidence are contamination and loss of continuity.

In evidence law, physical evidence (also called real evidence or material evidence) is any material object that plays some role in the matter that gave rise to the litigation, introduced as evidence in a judicial proceeding (such as a trial) to prove a fact in issue based on the object's physical characteristics.

The two types of evidence at crime scenes:

Biological evidence (e.g., blood, body fluids, hair and other tissues)

Latent print evidence (e.g., fingerprints, palm prints, footprints)

The biggest impediment to an investigation is the removal or loss of a piece of evidence from the scene of a crime.

Hence, at any crime scene, the two greatest challenges to the physical evidence are contamination and loss of continuity.

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Answer:

Newtows first law of motion

vf²=vi²+2ad

5²=0+2a.100

a=0.125 m/s²

20²=0+2 x 0.125 x d

400 = 0.25d

d = 1600 m

Answer:

convex lense

Explanation:

people with hyperopia or hypermetropia are long sighted or farsighted, so what happens here is that light doesn't focus on the surface of the retina but behind it so the picture is moved forward by positioning a convex lense in front of a hypermetropic eye and is correctly centered in the retina.

26.676 × 10³ kg is the weight of the aluminum rod.

Given:

Length of cylindrical rod (h) = 45 cm

Diameter of a cylindrical rod = 4.53 cm

Radius of a cylindrical rod (r) = 2.3 cm

The density = 3.7*10^3kg/m^3

Volume of a cylindrical rod = πr²h

                                             = 3.14× (2.3)² × 45

                                             = 747.89 cm

                                             = 7.4789 m

To find weight ;

                         ρ = [tex]\frac{Mass}{Volume}[/tex]                  ; ρ = Density

                        Mass = ρ × Volume

                                  = 3.7 × 7.48 × 10³

                                  =27.676 × 10³ kg

Therefore, the weight of the aluminum rod is 27.676 × 10³ kg.

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Answer:

h = 4.25 m

Explanation:

[tex]gravitational \space\ potential \space\ energy \space\ (gpe)= m g h\\[/tex] ,

where m is the mass, g is acceleration of gravity, and h is height of object.

In our case, m = 1.2 kg, g = 9.8m/s², and gpe = 50 J.

50 = 1.2 x 9.8 x h

h = 50 / (1.2 x 9.8)

h = 4.25 m

Answer:

4.25m

Explanation:

Joules is a "derived unit", meaning it is really composed of other units, and it is just abbreviated as a single letter.

[tex]1[J]=1 [\frac{kg \cdot m^2}{s^2}][/tex]

This comes from the formula for potential energy, often denoted "U"

[tex]U=mgh[/tex], where m is the mass of the object (measured in kilograms,  [tex]kg[/tex]), g is the acceleration due to gravity at that spot (measured in meters per second squared,  [tex]\frac {m}{s^2}[/tex]), and h is the height of the object (measured in meters, [tex]m[/tex]).

Note:  The object itself may or may not have an acceleration of "g" at the given point because it may be supported (like on a bookshelf).  However, the "g" is representative of its gravitational acceleration at that point if gravity could accelerate it unimpeded.

Rearranging the potential energy equation to isolate the unknown "h", dividing both sides by "m" and "g", we get the following:

[tex]\dfrac{U}{mg}=h[/tex]

Substituting known values (and rewriting Joules as its SI units so we can ensure units cancel the way we need them to):

[tex]\dfrac{\left (50 [\frac{kg \cdot m^2}{s^2}] \right)}{(1.2 [kg])(9.8 [\frac{m}{s^2}])}=h\\\dfrac{\left (50 [\frac{kg \!\!\!\!\!\!\!{--} \cdot m^{2 \!\!\!{-}}}{s^2\!\!\!\!\!\!\!{--} }] \right)}{(1.2 [kg \!\!\!\!\!\!\!{--} ])(9.8 [\frac{m\!\!\!\!\!\!\!{--} }{s^2\!\!\!\!\!\!\!{--} }])}=h\\\dfrac{(50)}{(1.2)(9.8)}[m]=h\\\\4.2517[m] \approx h[/tex]

Thus, the height of the book would be approximately 4.25meters high.

Answer:

10^2 + 10^2 = x^2

x = 14.2 m NW

Answer:

The change in time for the first quarter is  seconds.  = 2.07

The change in time for the second quarter is  seconds.

=1.09

The change in time for the third quarter is  seconds.

=0.95

The change in time for the fourth quarter is  seconds.=0.81

Explanation:

Hope this helped.

Total units

Cost°

The evidence that astronomers use to prove jets travel in opposite direction is Spectral lines from a very fast moving ionized gases.

Astronomer is a person who study astronomy which is a scientific study that has to do with space, space bodies, comets, planets, stars and so on.

Therefore, The evidence that astronomers use to prove jets travel in opposite direction is Spectral lines from a very fast moving ionized gases.

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Answer:

  (b)  see attached

Explanation:

A compound is composed of molecules, each of which is composed of atoms of two or more different elements.

A single atom of any type is not a compound, nor is a collection of atoms of the same type.

__

The attached figure shows a molecule of HCl, hydrogen chloride. It is a compound.

During arm elevation, the motion of the scapula moves is an upward rotation motion.

The scapula otherwise known as the shoulder blade is a bone found in the upper limb and forms part of the shoulder and the back.

They are triangular in shape.

The scapula enables movement of the shoulder and the arm in about six ways.

During arm elevation, the motion of the scapula moves is an upward rotation motion: protraction, retraction, elevation, depression, upward rotation, and downward rotation.

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Glenohumeral external rotation is the concurrent motion at the glenohumeral joint which occurs with shoulder abduction.

This refers to the process in which the arm is moved away from the body which also affects the ball and socket joint.

This is referred to as glenohumeral joint in this case which moves in an external rotation manner.

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Answer:

Force can make a body that is at rest to move. It can stop a moving body or slow it down. It can accelerate the speed of a moving body. It can also change the direction of a moving body along with its shape and size.

The statement that is true about solar system densities is The denser planets lie closer to the Sun while the farther one planets from the sun have lower densities.

Solar system comprises of the the planets, moon, stars, comets , smaller bodies and how they orbit around the sun.

Therefore, The statement that is true about solar system densities is The denser planets lie closer to the Sun.

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Explanation:

1. the potential difference across the combination is the algebraic sum of yhe potential differences across the individual capacitors

2. the equivent capacitance of the combination is less than the capacitance of any of the capacitors..

Explanation:

The correct is A.

every magnet have two pole

Answer:

It can be either a moon or a satellite

Explanation:

a moon is a piece of space debris that orbits a planetdue to the planets gravitational force. Inherently, satellite mimics a moon but it is used for collecting data and etc

12.4 moles of fluorine atoms are in a sample of fluorine that contains 7.45 x 10²⁴ fluorine atoms. Details about number of moles can be found below.

The number of moles in a molecule of a substance can be calculated by dividing the number of molecules by Avogadro's number.

According to this question, a sample of fluorine that contains 7.45 x 10²⁴ fluorine atoms. The number of moles in this sample can be calculated as follows:

no of moles = 7.45 × 10²⁴ ÷ 6.02 × 10²³

no of moles = 1.24 × 10¹

no of moles = 12.4moles

Therefore, 12.4 moles of fluorine atoms are in a sample of fluorine that contains 7.45 x 10²⁴ fluorine atoms.

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