Express the number in scientific notation: 4/100

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 type of wave interaction occurred is destructive interference

Explanation:

Given that,

Max and Jimmy jump at same time.

Wave crest makes by Max and wave trough makes by Jimmy.

We need to find the type of wave interaction occurred

According to given data,

We know that,

If the wave crest and wave trough are interacted to each other then the interaction is destructive interference.

If the wave crest and wave trough are interacted with crest and trough then the interaction is constructive interference.

So, we can say that if the wave crest and wave trough are interacted to each other then the interaction is called destructive interference

Hence, The type of wave interaction occurred is destructive interference

Answer:

destructive interference

Explanation:

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

Because the mass is constant, if the velocity is increased, the kinetic energy must also increase.

Answer:

kinematic eq.  d = Vi*t + 1/2a*[tex]t^{2}[/tex]

Explanation:

Vi=0

d=1/2 a*[tex]t^{2}[/tex]

d= 1/2(9.8)[tex]0.9^{2}[/tex]

d=3.969 m

The distance from which the object falls is 393.9 meters.

Given that, an object falls from a high building and hits the ground in 9.0 seconds and air resistance = 0

So the distance can be calculated by the formula given below.

[tex]s = vt + \dfrac{1}{2} at^2[/tex]

Where, [tex]s[/tex] is the distance in meters, [tex]t[/tex] is time (in seconds) taken by the object in motion, [tex]a[/tex] is the acceleration of the object in meter per second square and [tex]v[/tex] is  the final velocity in meter per second.

In this case, object falls from high building to the ground so the final velocity would be zero. Gravitational acceleration is -9.8 meter per second square.

Substituting the values in the above formula,

[tex]s = (9.0\times0) + \dfrac{1}{2}(-9.8\times(9.0)^2)\\s = 0 + (-9.8\times81\times0.5)\\s = 396.9 \;\rm m[/tex]

The distance from which the object falls is 393.9 meters.

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Answer:

static friction is developed between 2 surfaces in state of rest so i think answer is c.Even though the wheel is in motion, the patch of the tire in contact with the ground is stationary relative to the ground, so it is static rather than kinetic friction.

The static friction is the hindrance to an object which is trying to move from stationary state. Among the given options, the example for static friction is pushing the box that is at rest.

The friction that occurs when people attempt to move a stationary object on a surface without actually causing any relative motion between the body and the surface.

The static frictional force is self-regulating, which means that it will always be equivalent to and opposite to the force applied. Static friction is zero for an object at rest on a flat table.

Static friction creates an equal and opposite force that keeps the book at rest when you push horizontally with a small force.The static friction force increases to match the force as you push harder.

The maximum static friction force is eventually exceeded, and the book moves. Therefore, option B is correct.

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Answer:

the correxct adnswer is d

Explanation:

lol

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

[tex]\huge\bold\green{Answer:-}[/tex]

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:

4 miles per hour

Explanation:

Your welcome

Answer:

Explanation:

In this unit of measurement for distance or length, the units are arranged from the least to the largest unit i.e

mm < cm < m < km

Where mm is millimeter, cm is centimeter, m is meter and km is kilometer.

Hence, the appropriate unit to be used depends on how small or wide the length/distance being referred to is. For instance, the length of a stapler pin should be measured in millimeter while the length of a pen should be measured in centimeter. The appropriate measurement can be determined by determining the closest unit the value falls into. For instance, there is no need to refer to a length as 1000 cm when it can be referred to as 10 m (since 100 cm equals 1 m)

1. Width of a physics book should be measured in centimeters (this is similar to length of a pen).

2. Distance from New York to Utah should be measured in kilometers (Distance between far cities or states are measured in kilometers).

3. Length of a fingernail should be measured in millimeters (this is similar to the length of a stapler pin)

4. Length of hallway should be measured in meters (This is generally larger than centimeter but lesser than kilometer)

5. Height of a mountain should be measured in kilometers (This is usually a very long distance from the earth surface)

6. Length of a fork should be measured in centimeters (This is similar to the length of a pen).

7. Distance between cities should be measured in meters (except the distance is far apart, distance between close cities are measured in meters)

8. Width of the eyeball should be measured in millimeters (similar to the length of a stapler pin and fingernail).

Answer:

A- Martin brings his friends home to meet grandpa.

Explanation:

took the test.

Answer:

A

Explanation:

on edge :)

Answer:

C

Explanation:

I guess...

Sorry if it's wrong

Answer:

mnnnnnbmbmmmmnnmmmmmmnnnnnnmmm.mm nooooo

Explanation:

awer some folom myy thans for dog

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:

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:

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:

B. when it loses a piece

Explanation: it likely gets lighter

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:

if 325 m ÷ 30

Explanation:

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

Answer: I believe it would be "only velocity increases " because the mass is constant, if the velocity is increased, the kinetic energy must also increase.

Answer:

they both increase

Explanation:

kinetic energy is proportional to velocity squared. which mean if kinetic energy goes up the velocity goes up double as much and kinetic energy is exactly proportional to mass so as kinetic energy increases so does mass.

Explanation:

D = M/V

We rearrange this equation to get V = M/D

So 14 g/7 g/mL,

the grams cancel out, and we're left with 2 mL.

D is the answer.

The volume of water displaced by the body is 2 ml.

Volume of a body is amount of space occupied by a body. As it has only magnitude (no direction), it is a scalar quantity. SI unit of volume is [tex]m^{3}[/tex].

Now, it is given that,

Mass of the object  is 14 grams.

Density of the object is 7 g/ml.

So, volume of the object will be = (mass of the object)/(density of the object)

= 14 grams/(7 g/ml).

= 2 ml.

When the object is placed in water, it sinks. That's why, volume of water displaced by it is equal to the total volume of the body.

Hence, The volume of displaced water is 2 ml.

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Answer:

☆<《HOPE IT WILL HELP YOU 》>☆

Explanation:

The probability of getting 4 is 1

Answer:

1/6

Explanation:

There are 6 faces, and one of them is 4. Therefore the answer is 1/6.

Answer:

Because they memorized the keys

Or their just used to using a keyboard

Explanation:

Answer:

27.82m

Explanation:

The distance of the cyclist can be calculated using the formula:

S = ut + 1/2 (at^2)

Where; S = distance

u = initial velocity

a = acceleration

t = time

However, to find acceleration, we use:

a = v - u/t, where v is the final velocity

According to this question, u = 4.2m/s, v = 6.3m/s, t = 5.3s

a = 6.3 - 4.2 / 5.3

a = 2.1/5.3

a = 0.396m/s^2

Hence, using S = ut + 1/2 (at^2)

S = (4.2 × 5.3) + 1/2 (0.396 × 5.3 × 5.3)

S = 22.26 + 5.56

S = 27.82

Therefore, the cyclist travel in 27.82m

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:

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°