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Answer:

The atoms in Damien’s candy are vibrating faster.

When the atoms in something are going at rapid speeds they create heat.

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:

Natural convection

Explanation:

Natural convection occurs when fluids are heated. When the fluid molecules are heated, the fluid becomes larger and lighter. The heated molecules take up more space and rise to the top, while the cooler molecules sink to the bottom. These cooler molecules then become heated.

Answer:

I think he answer is C but I could be wrong

Explanation:

brainliest plz

Answer:

d mark brainlyest

Explanation:

The mass of 3.99 moles of kr is 334 g. So, the correct option is option a) 334 g.

To determine the mass (in g) of 3.99 moles of Kr, we can use the molar mass of Kr and the given moles. Here's a step-by-step explanation:

To find the mass of 3.99 moles of Kr, we can use the following formula:

mass = moles x molar mass
1. Find the molar mass of Kr. The molar mass of krypton (Kr) is approximately 83.8 g/mol.
2. Multiply the given moles by the molar mass. Mass = moles × molar mass

Mass = 3.99 moles × 83.8 g/mol ≈ 334.4 g

The mass of 3.99 moles of Kr is approximately 334 g, so the correct answer is 334 g.

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Answer:

The fall in temperature of the liquid is 8.6 +/- 0.1 ⁰C

Explanation:

Given;

initial temperature of the liquid, t₁ = 76.3  +/-  0.4⁰C

final temperature of the liquid, t₂ = 67.7  +/-  0.3⁰C

The change in temperature of the liquid is calculated as;

Δt = t₂  -  t₁

Δt = (67.7 - 76.3)  +/-  (0.3 - 0.4)

Δt = (-8.6)  +/-  (-0.1)

Δt = 8.6 +/- 0.1 ⁰C

Therefore, the fall in temperature of the liquid is 8.6 +/- 0.1 ⁰C

Answer:

In a tug of war, the forces applied by the two people on the rope must be equal in magnitude but opposite in direction. Therefore, if one person has twice the mass of the other, the person with the larger mass will experience twice the acceleration of the person with the smaller mass.

If the heavier person has twice the mass of the lighter person, and the two people meet after a brief time, it follows that the heavier person will have traveled twice as far as the lighter person. Since the rope is 12 meters long, and the two people meet at the center of the rope, the lighter person will have traveled half the length of the rope, or 12 / 2 = 6 meters. Therefore, the heavier person will have traveled twice this distance, or 2 * 6 = <<2*6=12>>12 meters.

Since the heavier person started from the same position as the lighter person, the distance that the heavier person slid is equal to half the total distance traveled, or 12 / 2 = <<12/2=6>>6 meters. Therefore, the correct answer is (A) 6 meters.

It is important to continuously stir the salt-water solution while measuring the melting point in order to make sure the temperature of the solution is the same in the volume.

Melting point is the temperature at which a substance changes its state from solid to liquid. Here, the solid and liquid substance temperatures are in equilibrium.

Stirring aids the dissolution of the solute in the solvent to attain a uniform temperature.

Therefore, it is important to continuously stir the salt-water solution while measuring the melting point in order to make sure the temperature of the solution is the same in the volume.

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The height to which the tennis ball rebounds depends on the masses of the two balls and their initial velocities.

To solve this problem, we can use the principle of conservation of energy and momentum in elastic collisions. Let's assume that the initial velocity of the basketball is v, and the initial velocity of the tennis ball is u. Also, let's assume that the mass of the basketball is M, and the mass of the tennis ball is m.

When the basketball hits the ground, its velocity is instantaneously reversed, so its final velocity is -v. During this collision, the momentum of the basketball changes from\(M_v\) to \(-M_v\), and the change in momentum is equal to the impulse imparted by the ground. Since the ground is assumed to be perfectly elastic, the magnitude of the impulse is equal to \(2M_v\).

The tennis ball is still moving down when the basketball hits the ground, so its velocity is still u. When the two balls collide, the total momentum is conserved. Therefore, we have:

\(M_v + mu = M(-v) + mv'\)

Where v' is the final velocity of the tennis ball after the collision.

Since the collision is elastic, the total kinetic energy of the system is conserved. Therefore, we have:

\(1/2 Mv^2 + 1/2 mu^2 = 1/2 Mv'^2 + 1/2 mv'^2\)

Using the conservation of momentum equation, we can solve for v' in terms of v and u:

\(v' = (M - m)/(M + m) v + 2mu/(M + m)\)

Substituting this expression into the conservation of energy equation, we can solve for v' in terms of the initial velocities:

\(v' = (u - v)(m/M) + u\)

Now, we can solve for the maximum height reached by the tennis ball. At the highest point of its trajectory, the kinetic energy of the tennis ball is zero, and all of its initial energy has been converted to potential energy. Therefore, we have:

\(1/2 mv'^2 = mgh\)

Where h is the maximum height reached by the tennis ball.

Substituting the expression for v' that we derived earlier, we get:

\(h = (1/2m) [(u - v)(m/M) + u]^2\)

Simplifying this expression, we get:

\(h = [(u + v)(m/M)]^2/8\)

Therefore, the height to which the tennis ball rebounds depends on the masses of the two balls and their initial velocities.

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Answer:

V = -39.2m/s

Explanation:

Given the following data

Time, t = 4secs

Since the rock is falling, we know that the initial velocity = 0

Acceleration due to gravity = 9.8m/s²

To find the final velocity, we would use the first equation of motion

V = U + at

Substituting into the equation, we have

V = 0 + (-9.8*4)

V = -39.2m/s

The final answer are resistance of a circuit is directly proportional to the power rating of the bulb. As a result, a 75-watt light bulb has a higher resistance than a 100-watt light bulb.

(a) A 100-watt light bulb draws more current than a 75-watt light bulb.

(b) A 75-watt light bulb has a higher resistance than a 100-watt light bulb. The current drawn by a circuit is directly proportional to the applied voltage and inversely proportional to the resistance of the circuit, as per Ohm's law.

As a result, the resistance of the light bulb can be determined by measuring the current flowing through it and the voltage across it. The resistance of a circuit is defined as the ratio of the voltage applied to the circuit to the current flowing through it.

Therefore, if we look at the above question, since the power of the bulb is proportional to the product of voltage and current, we can say that a 100-watt bulb would draw more current than a 75-watt bulb. This is due to the fact that the current drawn by the bulb is proportional to the power that the bulb can handle.

However, the resistance of a circuit is directly proportional to the power rating of the bulb. As a result, a 75-watt light bulb has a higher resistance than a 100-watt light bulb.

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Answer:

The gas law formula that should be used to solve the opportunity is;

Constant temperature, initial P·V = final P·V

Explanation:

From the question we have;

The initial volume of the cylinder, v₁ = 3.0 cc

The initial pressure of the gas in the cylinder, p₁ = 0.8 atm

The initial temperature of the gas in the cylinder, T₁ = Room temperature

The final volume of the cylinder, v₂ = 1.0 cc

The final pressure of the gas in the cylinder = p₂

The final temperature of the gas in the cylinder, T₂ = Room temperature

The gas law formula that should be used to solve the opportunity is Boyle's law which states that at constant pressure the pressure, of a given mass of gas is inversely proportional to the volume of the gas

Mathematically, Boyle's law can be expressed as follows;

P ∝ V

∴ P₁·V₁ = P₂·V₂

Which gives;

Constant temperature, initial P·V = final P·V

Answer:

-39.2m/s

Explanation:

Given that :

t = 4secs

g = -9.8m/s^2

v = ?

u = 0m/s ( since it was at rest )

V = u +at............. 1

Where v is the final velocity

a = -g = -9.8m/s^2 since the ball was dropped from a height which will eventually make it move against gravity

t = 4secs

Substitute the values into 1

v = 0 - 9.8×4

v = -39.2m/s

The maximum velocity during this interval of time is approximately 20 m/s, and it occurs at t ≈ 3 + √10 seconds.

To find the maximum velocity and the time at which it occurs, we need to differentiate the position function with respect to time.

Given: s = -2/3 t³ + 6t² + 2t

(a) To find the maximum velocity, we differentiate the position function to get the velocity function: v = ds/dt

Taking the derivative of the position function, we have:

v = d/dt (-2/3 t³ + 6t² + 2t)

v = -2t² + 12t + 2

To find the maximum velocity, we set the derivative equal to zero and solve for t: -2t² + 12t + 2 = 0

We can solve this quadratic equation using the quadratic formula:

t = (-b ± √(b² - 4ac)) / (2a)

Substituting the values into the formula, we get:
t = (-12 ± √(12² - 4(-2)(2))) / (2(-2))

t = (-12 ± √(144 + 16)) / (-4)

t = (-12 ± √160) / (-4)

t = (-12 ± 4√10) / (-4)

t = 3 ± √10

Since we're looking for the time during the interval from t = 0 to t = 6 s, we discard the negative root: t = 3 + √10

So, the maximum velocity occurs at t = 3 + √10 seconds.

To find the maximum velocity, substitute the value of t into the velocity function: v = -2(3 + √10)² + 12(3 + √10) + 2

v ≈ 20 m/s

Therefore, the maximum velocity during this interval of time is approximately 20 m/s, and it occurs at t ≈ 3 + √10 seconds.

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Answer:

Radiotherapy

Explanation:

Answer:

Radioisotopes are used in medicine as tracers to detect and diagnose medical problems. Radioisotopes are also used in radiation therapy to treat cancer.

Explanation:

sample answer on edge:3

Answer:If you mean how much heat it can transfer as a thermal mass - in order to move heat from one place to another:

Typically the relationships are given by specific heat capacity (at different temperatures) and latent heats, plus the end-point temperatures to determine which of these conversion factors are relevant.

If time comes into it, you are looking at including shape and thermal conductivity at the minimum, so you really would need to be more specific

Explanation:

Answer:

B

Explanation:

Gravity, the attractive force between all masses, is what keeps the planets in orbit. Newton’s universal law of gravitation relates the gravitational force to mass and distance

The force of gravity is what gives us our sense of weight. Unlike mass, which is constant, weight can vary depending on the force of gravity (or acceleration) you feel. When Kepler’s laws are reexamined in the light of Newton’s gravitational law, it becomes clear that the masses of both objects are important for the third law, which becomes a3 = (M1+ M2) × P2. Mutual gravitational effects permit us to calculate the masses of astronomical objects, from comets to galaxies.

The tension force does 2945 joules of work on Magnus during the first round of the strength competition.

The work done by a force is given by the formula,

W = Fd cosθ

where,

W = work done

F = magnitude of the force

d = distance moved in the direction of the force

θ = angle between the force and the direction of motion

In this case, the tension force is constant and horizontal, so the angle between the force and the direction of motion is zero. Therefore, the formula simplifies to,

W = Fd

Substituting the given values,

W = (1900 N) * (1.55 m)

W = 2945 J

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What is the magnitude of the acceleration of the space station as the astronaut is pushing off the wall?

Question Parameter(s):

The International Space Station has a mass of 1.8 × 105 kg. A 70.0-kg.

The station pushes off one wall of the station so she accelerates at 1.50 m/s2.

Generally, the equation for the  Force is mathematically given as

F = ma

Therefore

F = 70(1.50)

F= 105 N

In conclusion, the space station force

F = ma

105 = 1.8 * 10^5 a

a = 5.83 * 10^{-4} m/s^2

False. While there are known long-term effects of radiation exposure, the specific effects on an individual can vary depending on factors such as the type and amount of radiation exposure, age, health status, and genetics.

Some known long-term effects of radiation exposure include an increased risk of cancer, genetic mutations, and damage to organs such as the thyroid and reproductive organs. However, the severity and timing of these effects can vary widely among individuals. Additionally, exposure to radiation can also have immediate effects such as skin burns and radiation sickness. It is important to note that the long-term effects of radiation exposure can be reduced through measures such as limiting exposure time, using protective equipment, and following proper safety protocols.
b. False

Long-term effects of radiation on an individual are not entirely predictable. While it is true that exposure to high levels of radiation can lead to an increased risk of certain health issues such as cancer and genetic mutations, the specific outcome for an individual depends on various factors. These factors include the type and amount of radiation, duration of exposure, age, and individual genetic makeup. Additionally, the latent period between radiation exposure and the onset of health issues can vary significantly, making it challenging to predict the exact long-term effects for a particular individual.

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"The planet speeds up in its rotation about its axis when closer to the Sun, and slows down in its rotation about its axis when farther from the Sun" is not a correct, relevant statement regarding Kepler's 2nd Law.

The correct answer is option C.

Kepler's 2nd Law, also known as the Law of Equal Areas, states that a line connecting a planet to the Sun sweeps out equal areas in equal times as the planet moves in its elliptical orbit around the Sun. This law is relevant to the orbital motion of the planet, not its rotation about its axis.

The rotation of a planet about its axis is governed by other factors, such as its own internal forces and torques. The distance from the Sun does not directly affect the planet's rotation about its axis. Therefore, statement c is not a correct or relevant statement regarding Kepler's 2nd Law.

The correct statements regarding Kepler's 2nd Law are:

a. The planet speeds up in its orbit when closer to the Sun and slows down in its orbit when farther from the Sun. This is because the planet experiences a stronger gravitational force from the Sun when it is closer, resulting in a higher orbital speed.

b. The area of the angle "swept out" by an imaginary line connecting the planet and the Sun, during some fixed amount of time, never changes during its orbit around the Sun. This implies that the planet covers equal areas in equal times, reflecting the conservation of angular momentum in the absence of external torques.

d. The planet conserves angular momentum during its orbit around the Sun. This means that the product of the planet's moment of inertia and its angular velocity remains constant throughout its orbit, in the absence of external torques.

In summary, statement c is not a correct or relevant statement regarding Kepler's 2nd Law, while statements a, b, and d accurately describe the key aspects of Kepler's 2nd Law.

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Answer:Therefore, the speed of the object that has 9000 J of kinetic energy and a mass of 35 kg is 22.68 m/s.

Explanation:

An object has 9000 J of kinetic energy and a mass of 35 kg. What is the object's speed?

Data:

Ec = kinetic energy = 9000 J

m = mass = 35 kg

V = speed = ?

The formula of potential energy;

Where

We clear for speed, substitute data and solve:

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{Ec=\frac{m*v^2}{2} \iff \ V=\sqrt{\frac{2*E_c}{m} } } \end{gathered}$}}\)

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V=\sqrt{\frac{2*9000 \ J}{35 \ kg} } } \end{gathered}$}}\)

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V=\sqrt{\frac{18000 \ J}{35 \ kg} } } \end{gathered}$}}\)

Before continuing to answer, we work with the units, which in this case is Joules.

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V=\sqrt{\frac{18000 \ N*m}{35 \ kg} } } \end{gathered}$}}\)

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V=\sqrt{\frac{18000 \ \not{kg}*\dfrac{m}{s^2} *m}{35 \not{kg}} } \iff V=\sqrt{\frac{1800 \ \dfrac{m}{s^2} *m}{35} } } \end{gathered}$}}\)

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V=\sqrt{\frac{18000 \ \dfrac{m^2}{s^2} }{35 \ } } } \end{gathered}$}}\)

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V=\sqrt{514.2857142857142857 \ \frac{m^2}{s^2} } } \end{gathered}$}}\)

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V=\sqrt{514.286 \ \frac{m^2}{s^2} } } \end{gathered}$}}\)

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V=22.6778746799606422=22.6778 \ m/s } \end{gathered}$}}\)

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V \approx22.68 \ m/s } \end{gathered}$}}\)

Therefore, the speed of the object that has 9000 J of kinetic energy and a mass of 35 kg is 22.68 m/s.

Answer:

Centripetal force is the force that your body is moving in a circular way towards the center where your body is moving

Explanation:

The equation Jerry should use for the total resistance in a series circuit is R = R₁ + R₂ + R₃.

option A.

In a series circuit, all components are connected end-to-end, forming a single path for current flow.

A series circuit can contain any combination of resistors, capacitors, and inductors.

In a series circuit, the current flowing in each circuit component is the same  and the voltage drop in each circuit component is different.

Based on this, the total formula for the total resistance in a series circuit is given as;

R = R₁ + R₂ + R₃

where;

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Planet A exerts a force on planet B, the magnitude and direction of the gravitational force planet B exerts on planet A the gravitational force exerted by planet B on planet A is the same as the magnitude of the gravitational force exerted by planet A on planet B

Newton's third law states that if object A exerts a force on object B, then object B exerts an equal and opposite force on object A. Hence, if planet A exerts a gravitational force on planet B, then planet B exerts an equal and opposite gravitational force on planet A.The magnitude of the gravitational force exerted by planet B on planet A is the same as the magnitude of the gravitational force exerted by planet A on planet B, this is according to the law of universal gravitation,

This law states that the force of gravity between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers. The direction of the gravitational force exerted by planet B on planet A is towards planet B's center, just as the direction of the gravitational force exerted by planet A on planet B is towards planet A's center. Therefore, we can say that the magnitude and direction of the gravitational force planet B exerts on planet A is equal and opposite to the gravitational force planet A exerts on planet B

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Answer:

50 degrees

Explanation:

the angle between the incident ray and the reflected ray is 80 degrees

80 degrees   +  inc + refl = 180

inc = refl = 50 degrees

For Each Of The Following Scenarios Described Where A Molecule Or Ion Is Moving From One Side Of A Membrane To The Other, Option A is correct answer.

Scenario A: Oxygen moving across a plasma membrane Answer: A. Simple Diffusion Scenario B: Glucose moving across a plasma membrane Answer: C. Facilitated Diffusion By A Carrier/Transport Protein Scenario C: Sodium moving across a plasma membrane Answer: B. Facilitated Diffusion By A Channel Protein Scenario D: Water moving across a plasma membrane Answer: A. Simple Diffusion : Simple diffusion allows the nonpolar and small molecules to pass through the plasma membrane without any assistance of proteins. In facilitated diffusion, larger polar molecules or ions move across the membrane through the help of transport proteins. Transport proteins are of two types, channel and carrier proteins. Channel proteins provide an open path for the molecules to move whereas carrier proteins hold the molecules to move across the membrane and change their shape.

Option A is correct answer.

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Answer:

\(\boxed {\tt \frac{2}{3} \ or \ 0.666666667 \ g/cm^3}\)

Explanation:

Density can be found by dividing the mass by the volume.

\(d=\frac{m}{v}\)

The mass is 20 grams.

We have to find the volume.

\(m= 20 \ g\\v= 30 \ cm^3\)

Substitute the values into the formula.

\(d=\frac{20 \ g}{30 \ cm^3}\)

Divide.

\(d=\frac{2}{3} \ g/cm^3\)

\(d= 0.666666667 \ g/cm^3\)

The density is 2/3 grams per cubic centimeter.

Answer:

The answer is D

Explanation:

A must always be taller than B  for the skateboarder to have just enough energy to complete the loop.

Centripetal acceleration is a characteristic of an object's motion along a circular path. Centripetal acceleration applies to any item travelling in a circle with an acceleration vector pointing in the direction of the circle's center.

To cancel out gravitational acceleration at point  B, the skateboarder should have centripetal acceleration, that is, he should have some amount of kinetic energy.

Hence, from conservation of energy, it may be written that:

Potential energy at point A = (potential energy + kinetic energy) at point B

mgh₁ = mgh₂ + mv²/2

Hence, h₁ > h₂

That is, Height of A > height of B

Hence,  A must always be taller than B  for the skateboarder to have just enough energy to complete the loop.

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