Erin said that when you are standing in front of a fire you are warm because you release the coolness of your body to the heat of the fire.



Chris said that when you are standing in front of a freezer with the door open you feel cool because the air from the freezer is being transferred to your body.

Who has made the accurate statement regarding heat transfer?

Both Erin and Chris are correct.
Erin is correct.
Chris is correct.
Neither Erin nor Chris are correct.

Answers

Answer 1

third down, chris is correct


Related Questions

A girl travels 50m in 12s and then another 30m in 5s .Calculate her average speed?​

Answers

Answer:

4.71m/s

Explanation:

Average speed = Total distance travelled ÷ Total time taken.

80/17=4.71

4.71m/s

Answer:

Average speed = Total distance travelled ÷ Total time taken.

In this question,

Total distance travelled = 50m + 30m

                                                = 80m.

Total time taken = 12s + 5s

                                     = 17s

So, Average speed would be 80 ÷ 17

= [tex]\frac{80}{17}[/tex]

 = 4.71 m/s. or 4.71 meter per second.

B
oc
OD
A metal has a specific heat capacity of 360J/(kg°C).
An object made of this metal has a mass of 2.0kg.
What is the thermal capacity (heat capacity) of the object?

Answers

Answer:

Thermal capacity of the object = 720 j/°C

Explanation:

Given:

Specific heat capacity of metal = 360J/(kg°C)

Mass of given object = 2 kg

Find:

Thermal capacity of the object

Computation:

Thermal capacity = Specific heat x Mass

Thermal capacity of the object = Specific heat capacity of metal x Mass of given object

Thermal capacity of the object = 360 x 2

Thermal capacity of the object = 720 j/°C

The valid digits in a measurement are called _____ digits.

Answers

Answer:

Significant

Explanation:

As the word suggests, significant figures or digits are numbers that are valid in measurement.

Answer:

SIGNIFICANT DIGITS

Explanation:

MARK ME BRAINLIEST PLZZZ

An aluminium cube of side 5cm and R.D 2.7 is suspended by a thread in alcohol of relative density 0.8o. Find the tension in thread.​

Answers

Answer:

The tension in the thread is approximately 3.2103225 Newtons

Explanation:

The given parameters are;

The side length of the aluminum cube, s = 5 cm

The R.D. of aluminum = 2.7

The relative density of alcohol into which the aluminum cube is placed = 0.8

The volume of the aluminum cube, V = s³ = (5 cm)³ = 125 cm³

The mass of the aluminum cube, V = The volume of the cube

The mass of the aluminum cube, m = V × R.D. × Density of water

m₁ = 0.000125 × 2.7 × 970 = 0.327375 kg

The mass of the alcohol displaced, m₂ = 0.000125 × 0.8 × 970 = 0.097

The tension in the string, T = The apparent weight of the aluminum cube, Wₐ

∴ The tension in the thread, T = Wₐ = (m₁ - m₂) × g

Where;

g = The acceleration due to gravity ≈ 9.81 m/s²

∴ T ≈ (0.327375 - 0.000125) × 9.81 = 3.2103225

The tension in the thread, T ≈ 3.2103225 N.

A football is projected at an angle of 30 from the ground with a n initial velocity of 10 m/s, take acceleration due to gravity is g= 10m/s2 .what is the time of flight

Answers

Answer: i dont know

Explanation:

Answer:

[tex]{ \bf \: time \: of \: flight : s = 0} \\ { \tt \: s \: is \: displacement} \\ \\ s = ut + \frac{1}{2} a {t}^{2} \\ 0 = u \sin( \theta) t - \frac{1}{2} g {t}^{2} \\ u \sin( \theta)t = \frac{1}{2} g {t}^{2} \\2 u \sin( \theta) = gt \\ { \boxed{ \tt{formular : time \: of \: flight = \frac{2u \sin( \theta) }{g} }}} \\ t = \frac{2 \times 10 \times \sin(30 \degree) }{10} \\ { \green{ \boxed{ \tt{ \bf{answer : { \tt{time \: of \: flight =1 \: second }}}}}}} \\ \\ { \tt{becker \: jnr}}[/tex]

To pop a balloon you stab it with a pencil. If the area of the pencil tip is .01 cm² and the pressure applied by the pencil to the balloon is 100 N/ cm², how hard (what force) must you push on the pencil to make the balloon pop?

Answers

Answer:

Push with force of 1N

Explanation:

I have explained in the paper.

Goodluck

You must push with 1 newton  on the pencil to make the balloon pop.

What is force?

The definition of force in physics is: The push or pull on a massed object changes its velocity.

An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude. The application of force is the location at which force is applied, and the direction in which the force is applied is known as the direction of the force.

A spring balance can be used to calculate the Force. Newton is the SI unit of force.

Applied pressure is = 100  N/cm².

Cross sectional area = 0.01 cm².

The required force = pressure × area

= 100 N/cm² × 0.01 cm²

= 1 Newton.

Hence, you must push with 1 newton  on the pencil to make the balloon pop.

Learn more about force here:

https://brainly.com/question/13191643

#SPJ2

Why do we see different phases of the lunar cycle?

A) As the moon rotates around its axis, different sides of it become visible.
B) as the earth rotates its axis, people can see different sides of the moon.
C) as earth revolves around the sun, the moon is cast into different shadows by earth.
D) as the moon revolves around earth, the different amounts of the sunlit side faces earth.

Answers

It’s d let me know if I am wrong

Answer: The answer is: D) as the moon revolves around earth, the different amounts of the sunlit side faces earth.

Explanation: I have my ways ;>

Have a great day!

-Sunny

Match the reactants with the products. zinc sulfate + copper aluminum chloride + copper copper oxide copper + water copper sulfate + oxygen

Answers

Answer:

The Reactants                                                       Products                          

Copper sulfate + zinc             →                        Zinc sulfate + copper

aluminum + copper chloride     →                    Aluminum chloride + Copper

Copper + Oxygen                     →                      Copper oxide

Explanation:

The Reactants                                                       Products                          

Copper sulfate + zinc                                        Zinc sulfate + copper

aluminum + copper chloride                            Aluminum chloride + Copper

Copper + Oxygen                                             Copper oxide

First reaction can be described as a single replacement reaction

Second reaction is also a single replacement reaction just like the first reaction

The third is a synthesis reaction ( i.e. reaction in which elements combine to form single compound )

in a series circuit, how does the voltage supplied by the battery compare to the voltages on each load?

Answers

Answer:

In a series circuit, how does the voltage supplied by the battery compare to the voltage on each load? The voltage of the battery is equal to the voltage of each load added together. ... The voltage across the two resistors must both have the same voltage of the battery.

Explanation:

mark me as BRAINLIEST

follow me

carry on learning

Answer:

The voltage of the battery is equal to the voltage of each load added together. The voltage across the two resistors must both have the same voltage of the battery.

>3

Which of the following is not a true statement

Answers

Answer:

gadjgdasgdghgsdgd

Explanation:sorry need answer

Answer:

V * t = cm/sec * sec = cm

V * t should give distance as a result  -  

The other three fit the fundamental equations

five scientist who travelled to space​

Answers

Answer:

The Most Famous Astronomers of All Time. Karl Tate, SPACE.com. ...

Claudius Ptolemy. Bartolomeu Velho, Public Domain. ...

Nicolaus Copernicus. Public Domain. ...

Johannes Kepler. NASA Goddard Space Flight Center Sun-Earth Day. ...

Galileo Galilei. NASA

A chemical reaction is the change that takes place when ____ or more substances interact to form new substances.​

Answers

Answer:

two or more substances

Explanation:

A chemical reaction can't take place if there is only one substance

Answer:

A chemical reaction is the change that takes place when two

or more substances interact to form new substances.

Explanation:

Chemical reactions occur when chemical bonds between atoms are formed or broken. The substances that go into a chemical reaction are called the reactants, and the substances produced at the end of the reaction are known as the products.

1) Un cuerpo se mueve desacelerando a razón de 8m/s2, calcula: a) La velocidad que tenía 5 segundos antes de detenerse. b) La distancia recorrida los últimos 5 segundos de su trayectoria.

Answers

Answer:

Initial velocity (u) = 40 m/s

Distance travel in last 5 seconds = 100 m

Explanation:

Given:

Acceleration (a) = 8 m/s²

Final velocity (v) = 0 m/s

Find;

1] Initial velocity before 5 sec

2] Distance travel in last 5 seconds

Computation:

1] Initial velocity before 5 sec

v = u + at

0 = u + (-8)(5)

u - 40 = 0

Initial velocity (u) = 40 m/s

2] Distance travel in last 5 seconds

s = ut + (1/2)(a)(t²)

s = (40)(5) + (1/2)(-8)(5²)

s = 200 - 100

Distance travel in last 5 seconds = 100 m

A current of 17 A flows through a resistor of 10 2. What is the voltage
across the resistor

Answers

Ohms law V = IR

17 x 10 = 170V

skater with a mass of 50.0 kg slides across an icy
pond with negligible friction. As he approaches a
friend, both he and his friend hold out their hands,
and the friend exerts a force in the direction oppo-
site to the skater's movement, which slows the skat-
er's speed from 2.0 m/s to 1.0 m/s. What is the
change in the skater's kinetic energy?
A. –25 J
C. – 100J
B. -75J
D. -150J​

Answers

Answer:

B

Explanation:

Calculate the kinetic energy before and after they hold hands. Then, to find the change in kinetic energy simply subtract the final KE by initial KE.

Which has greater kinetic energy, a car traveling at 40 mph or a half-as-massive car traveling at 80 mph?
a
-The 40 mph car
-The 80 mph car
-Both have the same kinetic energy
-Neither has kinetic energy

Answers

Answer:

The 80 mph car

Because the formula says 1/2 mass but for the velocity it is squared

PLS HELP IM GOING TO GIVE U BRAINLIST

The nucleus contains positively charged protons and uncharged neutrons . Protons and neutrons are collectively referred to as

A. nucleons
B. atoms
C. ions
d. molecules​

Answers

Answer : A) nucleons

Protons and neutrons are sometimes collectively called nucleons because they both are inside the nucleus of an atom.

A ball is thrown vertically up. If the ball reached at maximum height in 3s. Assume air resistance is negligible. What is the initial velocity of the ball. (Answer using a coordinate system where upwards is positive)

Answers

Answer:

Explanation:Gravitational force always acts on the ball in the downward direction, thus an acceleration due to gravity always point in the downward direction with a constant magnitude  10.6m/s  

Which statement is the best interpretation of the ray diagrem shown below

Answers

Answer:

B...................

Answer:

Option A is correct: "A concave mirror forming a larger, virtual image"

Explanation:

There are two types of mirror:

Concave (converging) mirrors: a concave mirror is a mirror that reflects the light inward

Convex (diverging) mirrors: a convex mirror is a mirror that reflects the light outward

The image formed by a mirror can also be of two types:

Real image: it is formed on the same side of the object, with respect to the mirror

Virtual image: it is formed on the opposite side of the object, with respect to the mirror

In the figure of this problem, we see that:

< The mirror reflects the light from the object inward --> so it is a concave mirror

< The image is formed on the other side of the mirror --> it is a virtual image

So the correct option is

A) A concave mirror forming a larger, virtual image

Jenny is doing her homework when Jenny writes, the pencil exerts a force of 5N on the paper. The area of the pencil in contact with the paper is 0.5mm2 calculate the pressure of the pencil in the paper give the unit

Answers

Answer:

here is your answer

mark me as brainlist

Force=5N
Area(m)=0.0005
Pressure=1000Pa(m)
=100Pa(cm)

A runner is traveling with an initial velocity of 0.3 m/s in the positive direction accelerates at a constant rate of 0.4m/s^2 for a time of 2 seconds. What is the velocity at the end of 2 seconds?

Answers

Answer:

1.1 m/s

Explanation:

Applying,

v = u+at.............. Equation 1

Where v = final velocity, u = initial velocity, a = acceleration, t = time.

From the question,

Given: u = 0.3 ms, a = 0.4 m/s², t = 2 seconds

Substitute these values into equation 1

v = 0.3+0.4(2)

v = 0.3+0.8

v = 1.1 m/s

Hence the velocity at the end of 2 seconds is 1.1 m/s

ASAPP PLS HELP MEE
The density of aluminum is 2.7 g/cm^3. Which of the following statement is true?

A) 1 g of aluminium has a volume of 1 cm^3

B) 2.7 g of aluminium has a volume of 1 cm^3

C) 1 g of aluminium has a volume of 2.7 cm^3

D) 2 g of aluminium has a volume of 7 cm^3​

Answers

Answer:

B) 2.7 g of aluminium has a volume of 1 cm^3

Explanation:

Density can be defined as mass all over the volume of an object.

Simply stated, density is mass per unit volume of an object.

Mathematically, density is given by the equation;

[tex]Density = \frac{mass}{volume}[/tex]

If the density of aluminum is 2.7 g/cm³, it simply means that 2.7 g of aluminium has a volume of 1 cm³

Check:

Given the following data;

Mass = 2.7 grams

Volume = 1 cm³

Substituting into the formula, we have;

[tex]Density = \frac{2.7}{1}[/tex]

Density = 2.7 g/cm³

Answer pls…………………………

Answers

I’m not completely sure but I think the answer is car. Hope this helps!

Which of these is untrue about ray diagrams?
A. The arrowheads show the direction of the light

B. Lines must always be straight

C. More arrowheads on lines mean a brighter light

Answers

Answer:

The untrue option is C: "More arrowheads on lines mean a brighter light"

Explanation:

Ray diagrams are used to show how the light behaves with things like mirrors or lenses. Where we only study how the direction of the light changes when it interacts with these objects.

The "light" is represented with arrows, where again, the only thing we care is the direction of the light, so the first statement is true, the arrowheads show the direction of the light, and only that.

The intensity of the light, in this context, has no effect on how light behaves, so there is not a necessity of representing the intensity of the light, thus, more arrowheads on lines do not mean a brighter light. It may only be used to represent changes in direction of the light.

Finally, we know that light travels in straight pats (the pats can be curved in some cases, like with large gravitational fields, but this is not the case of a ray diagram) so the lines that represent the light should always be straight, thus option B is also true.

The untrue option is C: "More arrowheads on lines mean a brighter light"

Gold at 100.0°C is placed in 2.00×10^2 g of water at 20.0°C. The mixture reaches equilibrium at 21.2°C. the specific heat of gold is 0.129 (J/g°C) What is the mass of the gold? Specific heat of water is 4.18 (J/g°C) .

Answers

Answer:

there it is fella atleast i tried

In this experiment, the ______ was intentionally manipulated. This was the independent variable.
A. fan speed
B. mass
C. acceleration

Answers

Answer:

Fan speed

Explanation:

because is the dependent variable

calculate the volume of a ball having radius of 8 cm​

Answers

Step-by-step explanation:

V = 2,143. 6 cm³ (rounded to one-decimal place) is the volume of a ball that has a radius of 8 cm.

Answer:

2143.57 cm^3

Explanation:

volume of a ball = 4/3 *π*r^3

= [tex]\frac{4}{3} *3.14 *8^{3}[/tex]

=[tex]\frac{4*3.14}{3} *512[/tex]

[tex]\frac{12.56}{3} *512[/tex]

=[tex]\frac{12.56*512}{3}[/tex]

=[tex]\frac{6430.72}{3}[/tex]

=2143.57

Một vật có khối lượng 2 kg rơi tự do xuống đất trong khoảng thời gian 0,5 s. Độ biến thiên động lượng của vật trong khoảng thời gian đó là bao nhiêu ? Cho g = 10 m/s2.

Answers

Answer: The change in momentum is +20 kg.m/s

Explanation:

To calculate the final velocity of object, we use the first equation of motion:

[tex]v=u+at[/tex]

where,

v = final velocity

u = initial velocity = 0 m/s

a = acceleration = [tex]10m/s^2[/tex]

t = time = 0.5 s

Putting values in above equation, we get:

[tex]v=0+(10\times 0.5)\\\\v=5m/s[/tex]

Momentum is defined as the product of the mass and velocity of an object. It is given by the equation:

[tex]p=mv[/tex]

where,

p = momentum

m = mass of object = 2 kg

Let the upward velocity be positive and the downward velocity be negative

When the object is dropped, the velocity is downward

v = -5m/s

Initial momentum = [tex]2kg\times (-5m/s)=-10kg.m/s[/tex]

When the object is bounced back, the velocity is upward

v = +5m/s

Final momentum = [tex]2kg\times (+5m/s)=10kg.m/s[/tex]

Change in momentum = Final - Inital

Change in momentum = [10 - (-10)] = +20 kg.m/s

Hence, the change in momentum is +20 kg.m/s

A swimmer is capable of swimming at 1.4m/s in still water. a. How far downstream will he land if he swims directly across a 180m wide river? b. How long will it take him to reach the other side.

Answers

Answer:

t = 180 / 1.4 = 129 sec   (time to swim horizontally across river)

S = 129 sec * V     where V is speed of current and S is the distance he will be carried downstream

The problem does not specify V the speed of the river

Answer:

Explanation:

From the given information:

a) the distance(D) showing how dar downstream he will land can be computed as follows:

Assuming the current of the river = 0.2 m/s

[tex]D = \dfrac{180 \ m \times 0.2 \ m/s}{1.4 \ m/s}[/tex]

D = 36 m ÷ 1.4

D = 25.71 m

The required time (t) to reach the other side is:

time (t) = 180 m/ 1.4 m/s

time (t) = 128.57 seconds

if a train starts from rest and attains a velocity of 100m/s in 25 seconds. calculate the acceleration produced by the train.​

Answers

-4 km/s2

Explanation:
0-100/25
-100/25
-4
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Example of Coping StrategiesYou have an employee who copes with stressful problems by burying his head in the sand and pretending the problem does not exist. You are concerned this approach just delays the inevitable and want him to cope in a way that better addresses the problem head on. Which of the following would be a problem-focused coping strategy?A. Join a support group.B. Adopt a "glass is half full not empty" mentality.C. Hit a punching bag to release the frustration.D. Ask a coworker to help lighten the load. HW HELP ASAP PLZZZZZ All samples of a specific substanice have the same chemicalcompositionTRUEFALSE what is the critical PeriodHypothesis? Which of the following best describes the term postulate? A. A statement that is not officially defined but that is understood to be common sense B. A precise statement of the qualities of an idea, object, or process C. A logical arrangement of deductions that leads to the conclusion that a statement is always true D. A statement that is assumed to be true without proof Jen wants to finish half of her book. She is on page 24. The book has 68 pages. The equation shown represents this situation. 24+=682 Which is the missing number that represents how many more pages Jen must read to finish half of her book? Because this market is a monopolistically competitive market, the firm's average cost in long-run equilibrium is the long-run average cost it would achieve as a firm operating in a perfectly competitive market. The production level of a monopolistically competitive firm in long-run equilibrium is the production level of a perfectly competitive firm. This difference in output is predicted by the what is the balanced equation of magnesium carbonate decomposes on heating to form magnesium oxide and carbon dioxide The brain volumes (cm^3) of 50 brains vary from a low of 914 cm^3 to a high of 1492 cm^3. Use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 186.4 cm^3, assuming the estimate is accurate if it is within 15 cm^3. which of the following is most likely the next step in the series? If producers receive 1,000kcal of energy from the sun, what would the tertiary consumers in that energy pyramid receice? (draw a pyramid to assit you)A.100 kcalB.100,000 kcalC.10 kcalD.1 kcal Find angle X in the angle diagram. What is one thingthing Diana and Anneplanned to do together? 1. When the following oxidation-reduction reaction in acidic solution is balanced, what is thelowest whole-number coefficient for Rb*(aq)?Rb(s) + Sr?+(aq) Rb+ (aq) + Sr(s) A bond pays annual interest its coupon rate is 9.2% lts value at maturity is $1,000. lt matures in 4 years. Its yield to maturity is currently 6.2%.What is the duration of this bond in years.A. 3.11B. 4.00C. 3.55D. 3.34 Akhenatons new religion and city didnt last after he died. Give two reasons to support why Akhenaton didnt have the support of his people What is the meaning of armadillo? 1. What are the characteristics of a gas? The perimeter of an equilateral triangle is at most 45 centimeters. Find the possible length of each side. The table shows the number of tickets sold and the profit made at a fundraiser.Tickets SoldProfit2$184$366$548$72Which describes the relationship between the number of tickets sold and the profit?Each ticket sold yields $8 of profit.Each ticket sold yields $9 of profit.Each ticket sold yields $16 of profit.Each ticket sold yields $18 of profit.