2 cups were placed on a table with a temperature gauge inside of them. A heat lamp was placed over the top of the cups and turned on.
Below shows data for 2 different cups, one silver and one black, heated evenly over 5 minutes.

Use the link/screenshot for the data table please.



Using this data, how do the speeds at which the heat transferred compare? Be specific and CALCULATE the rate in degrees C/minute.


If you were given 2 other cups of the same material, one painted white and one shiny black, where do you think these would fit in terms of how quickly they heated up?

Which parts of this lab are examples of conduction, convection, and radiation?

Answer: Because of the friction force acting directly on the bag.

Explanation:

The function of the wheels is diminish the effect of the friction force, when the friction pulls back, it makes the wheel rotate, and this force is not applied directly on the bag.

Now the wheels are not working, so now the friction is acting directly on the bag, this is why the mand finds more difficult to drag the bag.

Answer:

false!!

your welcome!!!!

Narrow tires bikes are used in racing competitions.

Bikes that have narrow tires are used in race because narrow tires have an advantage over wider tires due to their higher speed as they provide less air resistance. Less air resistance on the bike having narrow tires allows the bike to move faster as compared to those bikes having wider tires due to more air resistance so we can conclude that bikes with narrow tires are used in racing competitions.

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Road bikes are meant for optimum performance

The option that gives the type of bikes that have the given specifications is the option;

Reason:

A road bike is a bike usually for competitive driving, meant for roads and that are paved roads, and not for racing tracks or rough terrains.

The specifications of a road bike are;

The frames are very lightweight, including the wheels and other parts

The handlebar is curled

The wheels of the tires are narrow

A front fork made of carbon fiber composite

It does not have have front or rear suspension

Includes variety for male and female riders

Therefore, the correct option is; road

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Answer:search this up but put quizzlet at the end it should be there

Explanation:

I'm pretty sure its compound

Answer:

True.

Explanation:

Total internal reflection is bound to occur when light travels from dense medium to less dense.

From the table given in the question above, we obtained:

Refractive Index of Crown glass = 1.52

Refractive Index of Asphalt = 1.635

From the above, Crown glass has a lower refractive index when compared to Asphalt. This means that Crown glass is less dense than Asphalt.

Therefore, total internal reflection will not occur when light travels from Crown glass to Asphalt because Crown glass is less dense than Asphalt.

The voltage drop across each resistor is equal to the voltage of the battery. The reason why it is this way is that in a series circuit, the voltage is shared equally among all the resistors.

This is known as Kirchhoff's Voltage Law (KVL). When the current flows through the resistors, it encounters resistance, which causes a voltage drop across each resistor. The total voltage drop across all the resistors in a series circuit is equal to the voltage of the battery.The voltage drop across each resistor in a series circuit is proportional to the resistance of the resistor.

The resistor with the highest resistance will have the highest voltage drop, and the resistor with the lowest resistance will have the lowest voltage drop.In conclusion, in a series circuit, the voltage drop across each resistor is equal to the voltage of the battery. This is because the voltage is shared equally among all the resistors.

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a) At the point the block is released, the initial velocity is zero, so the initial kinetic energy of the block is zero. The block is at a height of 55 meters from the ground, so its gravitational potential energy can be calculated using the formula;

PE = mghwhere m = 6 kg (mass of the block), g = 9.8 m/s² (acceleration due to gravity), and h = 55 m (height of the block from the ground)PE = mgh = (6 kg) (9.8 m/s²) (55 m) = 3,234 JTherefore, the gravitational potential energy of the block when it was released was 3,234 Joules (J).b) The kinetic energy of the block at the point of impact can be calculated using the formula; KE = ½mv²where m = 6 kg (mass of the block), and v = 30 m/s (velocity of the block)KE = ½mv² = ½ (6 kg) (30 m/s)² = 2,700 J.

Therefore, the kinetic energy of the block at the point of impact was 2,700 Joules (J).c) The law of conservation of energy states that energy cannot be created or destroyed, it can only be transformed from one form to another. At the point of impact, the block loses its kinetic energy. The mechanical energy "lost" by the block can be calculated as the difference between the initial potential energy and the final kinetic energy.

ΔE = PE - KE= (3,234 J) - (2,700 J) = 534 J

When the block hit the ground, it created a loud sound, generated heat, and also caused the ground to shake. Therefore, the mechanical energy that was "lost" by the block was transformed into sound energy, heat energy, and seismic energy.

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The bulb goes out at the beginning of the conductivity test because there is no complete circuit for electricity to flow through.

The conductivity test is a simple experiment used to determine whether a substance is a conductor or an insulator. In this test, a light bulb is connected to a battery through a wire, and the substance being tested is placed between the two ends of the wire. If the substance conducts electricity, the bulb will light up.

At the beginning of the test, the wires are clipped off at the bottom, and the bulb goes out because there is no complete circuit for the electricity to flow through. When the wires are clipped to the substance being tested, if the substance is a good conductor, it will allow the flow of electricity through it, completing the circuit and causing the bulb to light up. However, if the substance is an insulator, it will not allow electricity to pass through it, and the bulb will remain unlit.

Thus, the bulb goes out at the beginning of the conductivity test because there is no complete circuit for electricity to flow through. It is only when the wires are clipped to the substance being tested that a circuit can be completed, and the bulb will light up if the substance is a good conductor.

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Answer:

the forces are balanced :)

Explanation:

Answer:

B!  wave carry through the rope

Explanation:

After an action potential, the opening of voltage-gated potassium channels and Na channels causes the membrane to return to its resting membrane potential.

An action potential is defined as a difference in electrical charges across the cell membrane due to the unequal distribution of ions.

An action potential is produced by potassium and sodium channels that allow the movement of positive ions across the membrane.

In conclusion, after an action potential, the opening of voltage-gated potassium channels and Na channels causes the membrane to return to its resting membrane potential.

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Answer:

C

Explanation:

i did the test too

The activity of the source in Becquerel is 333.3Bq

The number of nuclei that disintegrate or decay per unit time is known as Activity.

Given that a sample of radioactive material emits 400000 particles over a period of 20 minutes.

Activity A = dN/dt

A = 400000 / 1200

A = 333.3 particles / s

A = 333.3 Bq

Therefore,

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True. In order to measure the distance to an object using parallax, it must be viewed from two different locations.

Parallax is the apparent shift in the position of an object when viewed from different perspectives. By measuring the angle of this shift and knowing the baseline distance between the viewing locations, the distance to the object can be calculated using trigonometry. Therefore, two different viewpoints or locations are necessary to obtain the necessary parallax measurements for distance determination.

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Answer:

See the answers below.

Explanation:

The cost of energy can be calculated by multiplying each given value, a dimensional analysis must be taken into account in order to calculate the total value of the cost in Rs.

\(Cost=0.350[kW]*12[\frac{hr}{1day}]*30[days]*4.5[\frac{Rs}{kW*hr} ]=567[Rs]\)

The fuse can be calculated by knowing the amperage.

\(P=V*I\)

where:

P = power = 350 [W]

V = voltage = 240 [V]

I = amperage [amp]

Now clearing I from the equation above:

\(I=P/V\\I=350/240\\I=1.458[amp]\)

The fuse should be larger than the current of the circuit, i.e. about 2 [amp]

Answer:

The fourth one

Explanation:

It's the only one to represent volume (cm³ vs. m³) and have kilograms in the denominator.

Have a wonderful weekend!

If we want to convert the density of the silicon from  2.33 gram/ centimeter3 to kilogram /meter3 unit we have to perform the operation

(1 kilogram/ 10³ grams) ×(1 centimeter/10⁻² meters)×(1 centimeter/10⁻² meters)×(1 centimeter/10⁻² meters)

Therefore the correct answer is option B.

It can be defined as the mass of any object or body per unit volume of the particular object or body. Generally, it is expressed as in gram per cm³ or kilogram per meter³.

As given in the problem we have to convert the density of the silicon from  2.33 gram/ centimeter3 to kilogram /meter3 unit

1 kilograms = 1000 grams

1 meter = 100 cm

2.33 gram/ centimeter3 = 2.33×10 ⁻³kilogram / 10 ⁻⁶meter3 unit

                                       = 2.33×10³kilogram / 10 ⁻⁶meter3 unit

Thus, the correct answer is option B.

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True. The step of a flywheel is the surface that the pressure plate of the clutch contacts, and it is an important factor in the function of the clutch.

The step provides a flat and even surface for the pressure plate to push against, which allows it to develop the necessary clamping force to keep the clutch from slipping.

If the step of the flywheel is not deep enough, the pressure plate may not be able to develop enough clamping force to keep the clutch from slipping. This can result in poor performance, increased wear on the clutch, and potential damage to other components of the transmission. Therefore, it is important to ensure that the step of the flywheel is within the manufacturer's specifications during installation or replacement of the clutch.

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The statement is true. The step depth of a flywheel is crucial in a clutch system as it impacts the amount of clamping force the pressure plate can exert to prevent the clutch from slipping, affecting power transmission and potentially causing damage.

The statement 'If the step of a flywheel is not deep enough, the pressure plate will not develop enough clamping force to keep the clutch from slipping.' is indeed True.

In automotive engineering, the depth of the 'step' on the back of the flywheel is critically important for the operation of the clutch. The step is the recessed area where the plate fits. If it's not deep enough, the pressure plate can't exert enough pressure on the clutch disc to keep it from slipping when the engine's power is transmitted through the clutch. This may cause a loss of power to the wheels, excessive wear, and potential damage to other clutch components.

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To analyze the situation described, we can use the equation for the energy of a photon:

E = hf

Where E represents the energy of the photon, h is the Planck constant (6.626 × 10^(-34) J·s), and f is the frequency of the light.

To find the frequency of the ultraviolet light with a wavelength of 400 nm (400 × 10^(-9) m), we can use the relationship between frequency and wavelength:

c = λf

Where c is the speed of light (approximately 3 × 10^8 m/s), λ is the wavelength, and f is the frequency.

Rearranging the equation, we get:

f = c / λ

Substituting the values:

f = (3 × 10^8 m/s) / (400 × 10^(-9) m)

f = 7.5 × 10^14 Hz

Now, we can calculate the energy of the photon using the equation E = hf:

E = (6.626 × 10^(-34) J·s) × (7.5 × 10^14 Hz)

E = 4.97 × 10^(-19) J

The given value of the maximum kinetic energy of the emitted photoelectrons is 1.10 eV (1.10 × 1.6 × 10^(-19) J). This is the energy required to remove an electron from the metal surface, also known as the work function (W) of the metal.

Since the maximum kinetic energy of the photoelectrons is given by the difference between the energy of the incident photon and the work function, we have:

Maximum kinetic energy = Energy of photon - Work function

1.10 × 1.6 × 10^(-19) J = 4.97 × 10^(-19) J - W

Rearranging the equation, we can solve for the work function (W):

W = 4.97 × 10^(-19) J - 1.10 × 1.6 × 10^(-19) J

W = 3.69 × 10^(-19) J

Therefore, the work function (or the minimum energy required to remove an electron from the metal surface) is approximately 3.69 × 10^(-19) J.

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The wavelength of the sound wave is equal to 0.333 m. Therefore, option (c) is correct.

The frequency of the wave can be defined as the number of oscillations that occur in one second and can be expressed in hertz. The wavelength can be defined as the distance between the two adjacent points of a wave such as two crests or troughs.

The relationship between frequency (ν), speed of sound waves (V), and  wavelength (λ):

V = νλ

Given, the frequency of the sound wave, ν = 10 Hz

The speed of the sound wave,\(V = 340 m/s\)

The wavelength of the sound waves can determine as follows

λ = V/ν = 340/1020 = 0.333 m.

Therefore, the wavelength of the sound wave is 0.333 m

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Answer:

F1 = G M m / R^2       current force on earth

F2 = G M * 2 m / R^2     force if mass were doubled

F2 / F1 = 2         the force would be twice as large

The gravitational force between two objects not only depends on the mass but also the distance between them. If the distance to the star is same as to sun, then by doubling mass force also doubles. Thus option C is correct.

Gravitational force is the attractive force by which an object attracts other objects into its centre of mass. We are all standing in the ground because of the gravitational pull by earth.

The gravitational force between two objects of mass M1 and M2 at a distance r is written as follows:

g = G M1 M2/ r ² . where, G is gravitational constant.

As per this relation, gravitational force is directly proportional to the mass and inversely proportional to the square of the distance.

If the star has a distance from earth equal to the distance between sun and earth, but its mass is double the mass of sun, then the gravitational force will be two times compared with the sun.

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Answer:

Which sentence best states the central idea of paragraphs 21-22 in "Energy Story"?

A. Materials that are insulators and conductors have a high

resistance to electricity.

Part B

Which sentence from "Energy Story" best supports the answer in Part A?

B. "Its resistance measures how well something conducts

electricity."

Explanation:

Answer:

Explanation:

line graph

Answer:

N

S.I unit for force is Newton

ANSWER:

a. AB

STEP-BY-STEP EXPLANATION:

The greatest distance occurs when the speed is increasing and also takes less time to reach that speed.

According to the graph, the highest speed is 8 m/s and it reaches it in 3 seconds, therefore, it is where the greatest distance is given.

Therefore, the segment of greater distance is the segment AB

The magnitude of the total displacement of Olivia's trip is 1.9 miles. The direction of the total displacement of her trip is southeast.

To find the magnitude of the total displacement, we need to use the Pythagorean theorem:
a^2 + b^2 = c^2

In this case, a = 0.9 miles (the distance she travels south), and b = 0.8 + 1.4 = 2.2 miles (the distance she travels east).

Plugging in these values, we get:
0.9^2 + 2.2^2 = c^2
0.81 + 4.84 = c^2
5.65 = c^2
c = √5.65
c = 2.376

So the magnitude of the total displacement is approximately 2.376 miles.

To find the direction of the total displacement, we need to use the tangent function:
tan θ = opposite/adjacent

In this case, opposite = 2.2 miles (the distance she travels east), and adjacent = 0.9 miles (the distance she travels south).

Plugging in these values, we get:

tan θ = 2.2/0.9
θ = tan^-1(2.2/0.9)
θ = 67.38 degrees

So the direction of the total displacement is approximately 67.38 degrees from south, or southeast.

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Answer:

Explanation:

Mass of sofa(m) = 105 kg

Force= 403 N

F = μ*N

Where:

F = friction force = 403 [N]

μ = static coefficient

N = Normal force [N]

The normal force of a body lying on a horizontal surface can be calculated by means of the product of mass by gravitational acceleration.

mass × acceleration due to gravity = 105 × 9.8  =  1029

403= μ *1029

substitute force with 403 N and resistance with 1029 × μ

                                    403 = 1029 × μ

                                         μ = 403/1029

                                            = 0.391

Answer = 0.391

Answer:

Yes

Explanation: