The graph of mass versus kinetic energy shows that
mass is proportional to kinetic energy. In other
words, as the mass of the car increases, its kinetic
energy increases at the same rate.

Consider two cars, with the second car having a
mass six times the mass of the first car. Compare
the kinetic energy of each car. Then describe the
implications of your answer for using brakes to
bring each car to a complete stop.

Answer:

6 watts

Explanation:

hours against watts

I'm not sure though

The final velocity (in m/s) of a hoop that rolls without slipping down a 5.00-m-high hill, starting from rest will be 31.30 m/s

given

initial velocity = 0

displacement = s = 50 m

using kinematics equation

2as = \(v^{2} - u^{2}\)

2* (g) * s = \(v^{2}\) - 0

\(v^{2}\)  = 2 * (9.8) * 50

v = 31.30 m/s

The final velocity will be v = 31.30 m/s

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From the given options let's select the example which shows a conceptual model.

A conceptual model can be said to be a model which shows an abstract representation of any concept which can be visualized or imagined than other models.

It is a model which the designers want users to understand.

From the list, the best option which is an example of a conceptual model is a mental image of gas molecules as tiny balls.

Let's say, for example, you imagine or have a mental picture of gas molecules using your imagination, it helps to understand how a vacuum system works and you can easily solve the problem if something goes wrong.

Therefore, the example of a conceptual model is:

A mental image of gas molecules as tiny balls.

• ANSWER:

A. mental image of gas molecules as tiny balls

Answer:

c

Explanation:

I think c makes more sense.

Answer:

A or C

Explanation:

Answer:

Most energy crises have been caused by localized shortages, wars and market manipulation. Some have argued that government actions like tax hikes, nationalisation of energy companies, and regulation of the energy sector, shift supply and demand of energy away from its economic equilibrium.

Answer:

a.) L = 2.64 kgm^2/s

b.) V = 4.4 m/s

Explanation: Jessica stretches her arms out 0.60 m from the center of her body. This will be considered as radius.

So,

Radius r = 0.6 m

Mass M = 2 kg

Velocity V = 1.1 m/s

Angular momentum L can be expressed as;

L = MVr

Substitute all the parameters into the formula

L = 2 × 1.1 × 0.6 = 1.32kgm^2s^-1

the combined angular momentum of the masses will be 2 × 1.32 = 2.64 kgm^2s-1

b. If she pulls her arms into 0.15 m,

New radius = 0.15 m

Using the same formula again

L = 2( MVr)

2.64 = 2( 2 × V × 0.15 )

1.32 = 0.3 V

V = 1.32/0.3

V = 4.4 m/s

Her new linear speed will be 4.4 m/s

An average cyclist travels at a speed of 23 mph. Time (t) = 5.1 hours if she wants to ride 190 kilometers.

The distance traveled in a unit of time is called speed. It refers to a thing's rate of movement. The scalar quantity known as speed is the velocity vector's magnitude. It has no clear direction. A faster rate of movement is indicated by a higher speed. It travels slower if the speed is lower. It has zero speed if it isn't moving at all.

The formula: can be used to determine the constant velocity of an object traveling straight forward.

r = d / t

where

r stands for rate or speed (sometimes denoted as v, for velocity)

d is the traveled distance.

t the amount of time needed to finish the movement

The average speed of an object over a period of time is given by this equation. We can see the object's average speed here, however at some moments over the time frame, it may have been moving faster or slower.

As the time interval gets closer to zero, the maximum average speed is reached. The speed at that moment is what you see when you look at a speedometer in an automobile. While you may have briefly reached a speed of 60 mph, your average speed over the course of 10 minutes could have been much higher or much lower.

190 Km (given)

1 km = 0.621 miles (should know)

So, 190 km = (190x0-621) miles

                  = 118 miles

23 miles per hour means,

23 miles- 1 hour

so, 118 miles - (118 × 1/ 23) hour

118 miles = 5.1 hour.

Time (t) = 5.1 hour

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Answer:

i don't know lol, why you asking

Answer:

When a branch of a tree is shaken, some of the fruits may fall down. Why? Solution : The fruits fall down due to inertia of rest.

Answer:

I HOPE IT WILL HELP YOU A LOT....

Explanation:

work done is equals to force into displacement in the direction of force

Ans: D

The quantity that will have the same value along their paths is their acceleration option (D).

The rate at which the speed and direction of a moving object alter over time is known as acceleration. When anything begins to move faster or slower, it is said to be accelerating.

If we ignore air resistance, there will only be one force acting on the balls because they are all hurled straight up into the air: the force of gravity.

Where m is the ball's mass, the force of gravity acting on each ball is given by

The acceleration caused by gravity is known as g (9.8 m/s², downhill).

According to Newton's second law,

F=ma,

where F is the net force exerted on the ball:

And after simplifying, we discover that the acceleration of each ball is: and since g is a constant value, we draw the conclusion that each ball's acceleration is the same regardless of mass or initial speed.

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Complete question is "If several balls are thrown straight up with different initial speeds, the quantity that will have the same value along their paths is their(A) initial momentum.(B) maximum height.(C) time of travel.(D) acceleration".

Answer:

amplitude

Explanation:

sound travel and it amplifies

Complete question :

the resistance r =v/i where v = (100±5 )v and I = (10±0.2) a.find percentage error in r

Answer:

7%

Explanation:

Given that :

R = V/I

V = 100 ± 5

I = 10 ± 0.2

Percentage error in R can be obtained thus :

[(dV / V) + (dI / I)] * 100%

dV = ± 5

dI = ± 0.2

[(5 / 100) + (0.2 / 10)] * 100%

(0.05 + 0.02) * 100%

= 0.07 * 100%

= 7%

The blower uses 100 volts of the difference in potential when consumes current of 3 c/s in a time of 5.10min

The bulb is filled with a gas, typically a mixture of nitrogen and argon, that reduces the oxygen in the bulb to help stop the filament from burning. A filament with a high electric current resistance is made of a special wire, usually tungsten.

First, we should convert the power and the time:

Power of blower = 3.0 x 10² J/s

                         = 3.0 x 10² W

Time = 5.10 min

                         = 5.10 x 60 s

                                 = 306 s

Now, Charge = I × t

                        = 3 A × 306 s

                                      = 918 C

Finally, we can calculate the potential difference consumed:

                             ΔV = P × t / Q

                          ΔV = (3.0 x 10² W) × (306 s) / (918 C)

                               ΔV = 100 V

An electrical circuit is completed when a switch is turned on, allowing electric current to flow through its wires. Through the switch, along the wires, and into the light bulb, the current flows from the power source.

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a) The ground state electron configuration for iron (Fe) is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁶ 4s².

In the electron configuration, each number (e.g., 1s²) represents a specific energy level and orbital. The superscript indicates the number of electrons in that orbital. In the case of iron, the 3d orbital is filled with 6 electrons before filling the 4s orbital with 2 electrons.

b) The ground state electron configuration for aluminum (Al) is 1s² 2s² 2p⁶ 3s² 3p¹.

Aluminum has 13 electrons, and its electron configuration reflects the filling of the first three energy levels (1s, 2s, and 2p) before adding the 3s and 3p electrons.

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Several narrow tree rings in a row tell us that it was formed in the warm season.

Trees are those plants that grow very tall. We can see that ancient trees play an important role in the determination of the age of some fossils. The patterns of the rings that could be found in these trees also help us to know how old the particular tree is and especially the whether condition of the place around the time that the tree was formed.

This has been corroborated by a lot of biological evidences that show to tat effect. It can also tell us about the weather condition in a place at a particular time.

As such,  several narrow tree rings in a row tell us that it was formed in the warm season.

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Answer:

Explanation:

Answer:

False

Explanation:

Vertical component = 250 sin30

250×1/2=125N

The specific heat capacity of the liquid is 2.51 x 10³ J/kg⁰C.

The specific heat capacity of the liquid is calculated as follows;

Q = mcΔФ

where;

c = Q/mΔФ

c = (65 x 120)/(0.78 x 3.99)

c = 2.51 x 10³ J/kg⁰C

The complete question is below:

An electrical resistor immersed in a liquid produces 65.0 W of electrical energy for 120 s. The mass of the liquid is 0.780 kg and its temperature increases from 18.55°C to 22.54°C. a) Find the average specific heat capacity of the liquid in this temperature range.

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Answer:

Could you give information about the lab

Explanation:

Answer:

The spectrum of each astronomical object

Explanation:

I took the test and got it right

Antistatic mats and wrist straps are used to prevent anti-static charges from racing through devices. To prevent anti-static charges from racing through devices, antistatic mats and wrist straps use conductive materials that are connected to a ground source.

Antistatic mats and wrist straps use conductive materials that are connected to a ground source to prevent anti-static charges from racing through devices. A conductive mat is placed on the work surface, and a conductive wristband is worn around the wrist, which is then connected to the ground source. The purpose of these devices is to discharge any static electricity that may be present in the body before it can damage sensitive electronic components in devices.

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The amount of energy radiated by a star is directly proportional to its surface area and the fourth power of its temperature. Therefore, the more luminous star radiates 81 times more energy than the less luminous star.

If two stars have the same surface area but one has 3 times the temperature of the other, we can calculate the ratio of the energy radiated by the more luminous star compared to the less luminous star.

Let's assume the surface area of both stars is A. The energy radiated by the less luminous star can be represented as E1, and the energy radiated by the more luminous star can be represented as E2.

Since both stars have the same surface area, we can say that \(E1 ∝ T1^4\) and\(E2 ∝ T2^4\), where T1 is the temperature of the less luminous star and T2 is the temperature of the more luminous star.

Given that T2 = 3T1, we can substitute this value into the equations:

\(E1 ∝ T1^4\)
\(E2 ∝ (3T1)^4\)

Simplifying, we get:
\(E1 ∝ T1^4\)
\(E2 ∝ 81T1^4\)

Therefore, the more luminous star radiates 81 times more energy than the less luminous star.

In conclusion, if two stars have the same surface area but one has 3 times the temperature of the other, the more luminous star will radiate 81 times more energy than the less luminous star.

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Explanation:

VECTORS DEF: A vector is a quantity that has both magnitude and direction.

Answer:

C. Leadville has a higher elevation.

Explanation:

In those two cities depicted in the picture, one city being further west or east does not cause significant temperature change. (Too north or too south can change this but this is not what we are supposed to find.) Rules out A.

Latitude is basically where a city is on the map, either north or south, and they have the same latitude, so B doesn't make sense.

A difference between an average high and low does nothing to why it would be colder in one place over another.

C is the logical answer for this question. The elevation, or how high you're elevated, changes the temperature. The higher the elevation, the colder it becomes since you're more closer to the clouds, and the clouds are actually really cold. Did you know that? this is why we cannot breathe outside in airplanes, it is way too cold and not enough CO2 to survive.

Answer:

1.2 A

Explanation:

From the diagram attached, The three resistors are parallel because the each ends of the resistors are connected together. Since they are in parallel, the voltage across each resistor is the same. The voltage source connected in parallel to the resistors is 60 V. Therefore the voltage across the 50 Ω resistor is 60 V. Using ohm law:

Voltage (V) = Current (I) × Resistance (R)

V = IR

I = V/R

I = 60 V/ 50 Ω

I = 1.2 A

The current in the 50 Ω resistor is 1.2 A

The EROI (Energy Returned on Energy Invested) tells us how much energy we get back for every unit of energy we put into a particular energy source.

The higher the EROI, the more efficient and sustainable the energy source is. For example, if an energy source has an EROI of 10:1, it means that for every unit of energy invested in the production of that energy source, we get 10 units of energy in return. This would be considered a very efficient and sustainable energy source.

On the other hand, if an energy source has a low EROI, such as 2:1, it means that we are putting in more energy to produce that energy source than we are getting back in return. This would be considered an inefficient and unsustainable energy source, as it would require more energy to produce than it is able to provide.

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Answer:

4.2 N. S

Explanation:

Impulse =Force X Time

                35 X 0.12

                 4.2 N

Acceleration is a vector quantity that is defined as ❝ rate of change in velocity ❞

And as per the question, the plane can go from 0 miles to 100 miles/hour in 10 seconds that shows rate of change in its velocity. that is :

from 0 miles/hour to 100 miles/hour. hence Acceleration is the quantity being described about the new plane.

[ v = final velocity, u = initial velocity, t = time ]

So, the Acceleration of the new plane is 10 miles/hour²