Please help it’s physics and I suck at this subject :(

Answer:

A- Martin brings his friends home to meet grandpa.

Explanation:

took the test.

Answer:

A

Explanation:

on edge :)

Answer:

when The spoon is pulled down with a small amount of energy : short distance travelled by Marsh mallow

When the spoon is pulled down with a higher amount of energy : Long distance travelled by Marshmallow

Explanation:

when The spoon is pulled down with a small amount of energy :

After the release of the spoon  the Marshmallow travels a relatively short distance because the acceleration is < mass of the mass of the Marshmallow

F = ma. hence a = F/m    where a < m

When the spoon is pulled down with a higher amount of energy

After the release of the spoon the marshmallow travels a relatively long distance when compared to the application of small amount of energy

Yellow has the lowest density. I took the test and got this question correct. :)

The object represented by the yellow graph has the lowest density.

It is defined as the mass per unit volume of the body. Mathematically -

ρ = M/V

Given is a graph showing the variation of the mass with volume.

All of the given graphs are straight lines. The slope of the line determines the proportionality constant or density of the four objects whose graphs are plotted. The graph with the maximum slope will have the highest density and with the minimum slope has lowest density. It can be seen that the yellow graph has the smallest slope (slope is the angle any straight line makes with x - axis). So it will have the lowest density.

Therefore, the object represented by the yellow graph has the lowest density.

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Answer:

C

Explanation:

I guess...

Sorry if it's wrong

Answer:

3080

Explanation:

Potential energy is the energy stored or contained in a body as a result to its relative position to other objects, an example is an object that is placed at a height above the ground thereby experiencing gravitational energy.

Potential energy = mass × gravity × height

Given that: height = 11.08 m, gravity = 9.81 m/s² and mass = mass of boy + mass of ball = 25.1 + 2.94 = 28.34 kg

Potential energy =28.34 × 9.81 × 11.08 = 3080

Answer:

if 325 m ÷ 30

Explanation:

if 325 m ÷30 min then the answer would be 10.8 km /hour

Answer:

An echo is formed as a result of reflection of the original sound which returns to the listener. You might have experienced Echo in an EMPTY ROOM but no echo is produced after the room is occupied. To avoid echo from being produced the echo has to be absorbed.

Explanation:

Answer:

20 N up

Explanation:

Since the object on the floor is sitting still. Based on Newton's law of force. Objects must have equal reaction and force against each other for still objects. So the answer is 20 N up. Since the force are equal on both sides making the object not moving.

Answer:

84kg

Explanation:

If the mass of an astronaut in on the moon is 84kg on the moon. After the 3weeks in returning home, his weight will not change. The mass of the astronaut will remain the same which is 84kg. This is so because the acceleration due to gravity experienced by the body remains the same both in the earth and in moon.

Answer:

When there are two or more electrical devices in a circuit with an energy source, there are a couple of basic ways by which we connect them. They can either be connected in series or parallel

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A series circuit has only one path for electricity to flow from one point to another. The amount of electricity in the circuit is consistent throughout any component in the circuit. When electricity flows through a series circuit, its rate of flow (speed) will never fluctuate. The total resistance of a series circuit equals the sum of individual resistances. The more resistors that a series circuit has, the more difficult it is for electrons to flow.

A parallel circuit has multiple paths for electricity to flow from one point to another. According to website All About Circuits, “all components are connected between the same set of electrically common points.” Often, resistors and sources will be connected between two sets of electrically common points. In a parallel circuit, electricity can flow in multiple directions horizontally and vertically. The components of a parallel circuit will have the same voltage across their ends and will have identical polarities.

Answer:

150

Explanation:

work done = constant force x distance moved in the direction of force

W = F x S

(UNITS: J = N x m)

50 x 3 = 150

Answer:

Electron movement creates partial charges in different regions of molecules.  

Explanation:

The electrons play a role in the creation of London forces, which are intermolecular forces produced by the movement of the electrons in the atoms and molecules. The distribution of electrons will produce the formation of a temporary dipole, generating a partial charge in the atoms, which can induce a dipole into a subsequent atom (creating again partial charge), and so on.

Hence, the correct option is the second option: Electron movement creates partial charges in different regions of molecules.                      

I hope it helps you!    

The role played by electrons in creating intermolecular forces is that electron movement creates partial charges in different regions of molecules.

Molecules are held together by intermolecular forces. There are several kinds of intermolecular forces such as;

In all the kinds of intermolecular interactions mentioned above, interaction between molecules is made possible by movement of electrons which creates temporary or permanent dipoles in molecules due to partial charges in different regions of molecules.

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Answer:

It would be -8.6753 x 10 to the 6th power

Explanation

Answer:

Because they memorized the keys

Or their just used to using a keyboard

Explanation:

Answer:

the correxct adnswer is d

Explanation:

lol

Answer:

Gamma rays are mostly used in the radiotherapy/ radiooncology to treat cancer. They can also be used to spot tumours. Gamma rays can kill living cells and damage malignant tumor

Answer:

82.2

Explanation:

Answer:

40,000J

Explanation:

The heat energy required to raise the temperature of unit mass of substance through unit degree is called specific heat of substance . As given 2000J energy is needed to heat 1 kg of paraffin through 1

o

C, therefore specific heat of paraffin will be 2000J/kg−

o

C.

Now, heat energy required to raise the temperature of mass m of substance (specific heat c) through Δt is given by ,

Q=mcΔt,

Given: m=10kg,Δt=2

o

C,c=2000J/kg−

o

C

Q=10×2000×2=40,000J

Answer:

The velocity with which the 5.0 kg dog has to run to have the same momentum as the 30 kg pig walking at 3.0 m/s is 18 m/s

Explanation:

Given that the mass of the dog = 5.0 kg

The mass of the pig = 30 kg

The speed with which the pig is walking = 3.0 m/s

We have that linear momentum = Mass × Velocity

Therefore, the momentum of the pig, m₁ = 30 kg × 3.0 m/s = 90 kg·m/s

m₁ = 90 kg·m/s

The momentum of the dog m₂ = Mass of the dog × Velocity of the dog

Given that m₁ is to be equal to m₂, we have;

m₁ = 90 kg·m/s = m₂ = Mass of the dog × Velocity of the dog

90 kg·m/s = m₂ = 5.0 kg × Velocity of the dog

m₂ = 5.0 kg × Velocity of the dog = 90 kg·m/s

5.0 kg × Velocity of the dog = 90 kg·m/s

Velocity of the dog = 90 kg·m/s/(5.0 kg) = 18 m/s

The velocity with which the 5.0 kg dog has to run to have the same momentum as the 30 kg pig walking at 3.0 m/s = 18 m/s.

Answer:

The acceleration of the object is 0 m/s^2.

Explanation:

To solve this problem, we must remember that acceleration is equal to the change in velocity per unit time.  Since we are given that the velocity is constant, this means it is unchanging, and the acceleration is therefore zero.

Hope this helps!

Answer:

potential energy

Explanation:

potential energy

Chemical energy, the energy stored in chemical bonds, is thus considered a form of potential energy. Some everyday examples of potential energy include the energy of water held behind a dam, or of a person about to skydive out of an airplane.

The velocity of a plane that traveled 5000 miles north followed by 10000 miles north in 20 hours would be 750 miles/hour.

The total displacement covered by any object per unit of time is known as velocity. It depends on the magnitude as well as the direction of the moving object.

The mathematical expression for velocity is given by

velocity= total displacement/Total time

The total displacement of the plane = 5000 miles +10000 miles

                                                             =15000 miles

velocity =  displacement/Time

velocity =15000/20 hours

            =750 miles/hour  

Thus, the velocity of the plane would be 750 miles/hour.

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Your question seems incomplete, the complete question is,

what is the velocity of a plane that traveled 5000 miles north followed by 10000 miles north in 20 hours?

Answer:

B. when it loses a piece

Explanation: it likely gets lighter

Answer:

84 J

Explanation:

Work by mover:

W = Fd

W = 496 J (2.1 m)

W = 1042 J

Work by dolly and ramp:

W = Fd

W = (mg)d

W = 115 kg (9.8 m/s/s) (0.85 m)

W = 958 J

1042 J - 958 J

= 84 J

The amount of work  spent in overcoming friction is 83.65 J.

From the question,

The amount of work spent in overcoming friction = work done by the mover-potential energy of the refrigerator.

This is expressed mathematically as,

W' = Fd-mgh................... Equation 1

Where W' = work spent against friction, F = force applied, d = distance, m = mass of the refrigerator, g = acceleration due to gravity, h = height.

From the question,

Given: F = 496 N, d = 2.10 m, m = 115 kg, h = 0.85 m

Constant: g = 9.8 m/s².

Substitute these values into equation 1

W' = 496(2.1)-(115×9.8×0.85)

W' = 1041.6-957.95

W' = 83.65 J.

Hence, the amount of work  spent in overcoming friction is 83.65 J

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Answer:

a.  5.1 m/s b. 149.42°

Explanation:

a. Velocity of boat relative to earth, V = velocity of boat relative to river, V'+ velocity of river relative to earth, v.

We add these vectorially.

Since velocity of boat relative to river is 2.6 m/s due north and velocity of river relative to earth is 4.4 m/s due east, we apply Pythagoras' theorem and add them together since both velocities are perpendicular to each other.

So, V² = V'² + v² = (2.6 m/s)²  + (4.4 m/s)² = 6.76 (m/s)² + 19.36 (m/s)² = 26.12 (m/s)²

V = √[26.12 (m/s)²]

V = 5.1 m/s

b. Since the relative velocities of the ferry relative to the water and the velocity of the river relative to the earth are the components of the velocity of the ferry relative to the earth, the y - component being the velocity of the ferry relative to the earth since it is due north, and the x- component being the velocity of the river relative to the earth since it is due east. So, we have that

tanФ = y - component/x - component = V'/v where Ф is the angle between V and the west direction.

tanФ = V'/v

tanФ = 2.6 m/s ÷ 4.4 m/s

tanФ = 0.5909

Ф = tan⁻¹(0.5909)

Ф = 30.58°

So, the angle measured from due east with counterclockwise direction positive is 180° - Ф = 180° - 30.58° = 149.42°