Increase or decrease? 35 points ??? Please help

Answer:

In physics, work means the use of force to move an object. ... Not all force that is used to move an object does work. For work to be done, the force must be applied in the same direction that the object moves

The use of force to move an object is called Work.

A force can change the motion of an object. A force causes an object with mass to change its velocity (acceleration).

[tex]\bold{Force = Mass\times acceleration}[/tex]

while work is the result of the action when a force causes an object to move in the direction of the force.

[tex]\bold{Work= Force\times Displacement}[/tex]

Therefore, the use of force to move an object is called Work.

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Answer:

Shorter string produces more frequency in two different strings because the equation for frequency is velocity/wavelength , this means that a shorter string creates a shorter wavelength which essentially increases the total frequency produced

Answer:

 μ = 0.49

Explanation:

For this exercise we can use Newton's second law

Y Axis

       N - W = 0

       N = W = mg

X axis

       -fr = ma

the equation for the friction force is

        fr = μ N

we substitute

       -μ  m g = ma

        μ = -a / g

we calculate

      μ = 4.8 / 9.8

      μ = 0.49

well, you get some DNA from both of your parents, so when you hear the phrase, "You have your mother's eyes!" That means you have some of your mother's DNA that gave you her eye color. The DNA you get from your parents help determine how you look today

Answer:The foot exerts a force on the ball during a well-defined

duration t (time extent of the contact)

Explanation:

Answer:

b

Explanation:

The amount of work done to move an electron from the positive plate to the negative plate is :  7.2 * [tex]10^{-19}[/tex] J

Step 1: Given data

magnitude of two parallel plate ( E ) = 180 N/C

Distance between plates ( d ) = 2.5 cm

magnitude of charge on electron  ( e ) = [tex]1.602 * 10^{-19}[/tex]  C

Step 2 :  determine the work done

Work done = qV = еEd

                           = [tex]1.602 * 10^{-19}[/tex]  *  180 * 2.5

                           = 720 * [tex]10^{-22}[/tex] J  ≈   7.2 * [tex]10^{-19}[/tex] J

Hence the amount of work done to move an electron from the positive plate to the negative plate  =  7.2 * [tex]10^{-19}[/tex] J

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Answer:

vB' = 0.075[m/s]

Explanation:

We can solve this problem using the principle of linear momentum conservation, which tells us that momentum is preserved before and after the collision.

Now we have to come up with an equation that involves both bodies, before and after the collision. To the left of the equal sign are taken the bodies before the collision and to the right after the collision.

[tex](m_{A}*v_{A})+(m_{B}*v_{B})=(m_{A}*v_{A'})+(m_{B}*v_{B'})[/tex]

where:

mA = 0.355 [kg]

vA = 0.095 [m/s] before the collision

mB = 0.710 [kg]

vB = 0.045 [m/s] before the collision

vA' = 0.035 [m/s] after the collision

vB' [m/s] after the collison.

The signs in the equation remain positive since before and after the collision, both bodies continue to move in the same direction.

[tex](0.355*0.095)+(0.710*0.045)=(0.355*0.035)+(0.710*v_{B'})\\v_{B'}=0.075[m/s][/tex]

Answer:

The answer to this question is given below in this explanation section.

Explanation:

            "What element has conductivity,shiney luster,magnetic

-science"

silicon has a shiny luster,But it is brittle and conducts electricity poorly.Some metalloids change their characteristics when they react with different elements.Luster conductivity and malleability are physical properties can be observed be observed without attempting to change the identity of the substance.The term physical property is an observable characteristics of a substance. in this case the luster conductivity and malleability of metals are the properties, which can be observed  by our senses.It differs from chemical properties which can only be observed when the substance change its chemical identity.

Metal are solid at room temperature with the exception of mercury which is liquid at room temperature.Luster metal have the quality of reflection light from its surface and can be polished e.g gold,silver and copper.

Answer:

TRUE

Explanation:

The normal force felt by the box has magnitude

F[normal] = (1 kg) g = 9.8 N

so that the maximum magnitude of static friction is

F[s. friction] = 0.8 F[normal] = 7.84 N

In order to get the box to move, (C) a minimum force of 7.84 N is required.

Answer/Explanation:

The weight of an object is defined as the force that is exerted due to the gravitational force.

Mathematically, it can be written as :

W = m g

Where

m is the mass of the object

g is the acceleration due to gravity

Also,  

We know that the value of g varies with respect to the location. At the equator, the value of g is less as compared to the poles.

The feature of an object that affects its weight are :

Mass of the object

Location of the object

How much force Earth exerts on the object

Answer:B

Explanation:i think so im not suree

A sailboat that is tied up at the dock will experience tension force and gravity. Therefore, option (D) is correct.

Tension can be described as a force acting along the flexible length of a medium such as a rope, string, or cable, or a force carried by a flexible medium.

Tension can be defined as an action-reaction pair acting at each end of the elements. For a rope, tension is present in every section of the rope or string in both directions, apart from their endpoints. Each endpoint of the rope will experience tension and force from the weight attached to it.

Tension can also be defined as a pulling force but the tension is not a pushing force. Ropes or strings are used to exert forces since they transfer a force over a specific distance.

Therefore, sailboats experience the tension force due to the rope with which it is tied at the dock and the force due to gravity.

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Answer:

solids

Explanation:

beacause if you take an ice cube does it change its shape no and if it has a definite shape it is sure to have a definite volume

Answer:

Photoelectric effect, phenomenon in which electrically charged particles are released from or within a material when it absorbs electromagnetic radiation.

Explanation:

The effect is often defined as the ejection of electrons from a metal plate when light falls on it. In a broader definition, the radiant energy may be infrared, visible, or ultraviolet light, X-rays, or gamma rays; the material may be a solid, liquid, or gas; and the released particles may be ions (electrically charged atoms or molecules) as well as electrons. The phenomenon was fundamentally significant in the development of modern physics because of the puzzling questions it raised about the nature of light—particle versus wavelike behaviour—that were finally resolved by Albert Einstein in 1905. The effect remains important for research in areas from materials science to astrophysics, as well as forming the basis for a variety of useful devices.

The emission of electrons from the surface of a metal by the action of light is called photoelectric effect. This phenomenon indicates the behavior of light as particles called photons.

The phenomenon of ejection of electrons from the surface of a metal when light of a suitable frequency falls on it is called photoelectric effect. Upon striking the surface of metals , light can set up an electric current which current which corresponds to the flow of electrons. This phenomenon is discovered by Einstein

For instance, visible light can cause ejection of electrons from the surface of metal like cesium which has low ionization enthalpy. This phenomenon is related to the observation that if light is considered as particles.

The particles of light is then called as photoelectrons or photons. Photoelectric effect find application in photoelectric cells used in colorimetry, spectrophotometers etc.

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Answer:

no

Explanation:

because its cold

soup is hot

nobody this is a app to help others

Answer:

I bet my great grandmother would

Answer:

An atom is the part of an element. A particular element is composed of only one type of atom. Atoms are further composed of subatomic particles called electrons, protons and neutrons. Elements can combine with each other to form molecules via chemical reaction.

Answer:

Things like cloth and softmaterial, pliable, or porous materials

Explanation:

Answer:

Porous absorbers e.g paper, cardboards

Answer:

The current will not flow

Explanation:

An open circuit is a circuit that is not complete it has an opening Therfor the current can not flow.

Answer:

Khmer people make up 90% of the Cambodian population, followed by Vietnamese (5%), with the balance being Chinese, Cham (mostly a muslim people) and indigenous ethnic groups sometimes called Khmer Loeu

Explanation:

Answer:

Khmer

Explanation:

Answer:Distance.

Explanation:

Answer:

B

Explanation:

Answer:

unperscriebed drugs can e harmful to your body

Explanation:

Explanation:

hope it helps you

Answer:

14.7 J

Explanation:

PE=MGH

PE= 1.0 x 9.8 x 1.5 = 14.7 J

Answer:

Distance in Y axis and Time in axis

Answer:

the distance should be on the Y axis (vertical) and the time should be on the X axis (horizantial)

Answer:

When Zoe weighs the ingredients (sugar and baking soda), it weighs 25 grams in total. When she weighs the “snake” it weighs 23 grams. This is because some carbon dioxide gas produced during the chemical reaction escapes into the air.

Answer:

i) 2Mg + O₂ + Δ Heat → 2MgO + Δ Energy

ii) The aqueous solution does not change in the color of the blue litmus paper and the blue litmus paper remains blue in color

The aqueous solution formed using the product (MgO) turns the red litmus paper blue

Explanation:

i) Magnesium easily burns in air or oxygen when heated to form a white powder of magnesium oxide. The burning (reaction) of magnesium in air is an exothermic reaction that involves the release of heat and light

The burning of magnesium wire is given by the following chemical reaction;

2Mg + O₂ + Δ Heat → 2MgO + Δ Energy

ii) When magnesium oxide is mixed with water if forms magnesium hydroxide Mg(OH)₂ as shown in the following chemical reaction;

MgO + H₂O → Mg(OH)₂

Magnesium hydroxide is basic and therefore it will turn red litmus paper blue and it does not change the color of the blue litmus paper.

Answer: [tex]25.08\ m/s^2[/tex]

Explanation:

Given

mass of wagon m=5 kg

elevation

[tex]\theta =30.9^{\circ}\\F=150\ N[/tex]

Sin component of weight will oppose the applied force therefore we can write

[tex]F-W\sin \theta=ma\\where\\W=weight(mg)\\a=acceleration[/tex]

[tex]150-5\times 9.8\times \sin (30.09)^{\circ}=5\times a\\125.43=5a\\a=25.08\ m/s^2[/tex]

SINGLE TO RIGHT OR CENTER FIELD-On a single to center or right field the first baseman will be the cutoff to home. The shortstop will cover second base.