What is the reason for the widespread use of fins on surfaces? Group of answer choices Decreasing the rate of heat transfer from a surface by increasing the heat transfer surface area Decreasing the rate of heat transfer from a surface by decreasing the heat transfer surface area Increasing the rate of heat transfer from a surface by decreasing the heat transfer surface area Increasing the rate of heat transfer from a surface by increasing the heat transfer surface area

Answers

Answer 1

Answer:

ask your member

Explanation:

kayo lang din makakasagot nyan


Related Questions

1. A 6-volt battery produces a current of 0.5 amps. What is the power in the circuit?

Answers

Answer:

hope this will help you

have a great day

Explanation:

please mark me as the brainliest

The Sun's primary energy source is

Answers

Answer:

nuclear fusion

Explanation:

converting hydrogen to helium.

The sun generates energy from a process called nuclear fusion. During nuclear fusion, the high pressure and temperature in the sun's core cause nuclei to separate from their electrons. Hydrogen nuclei fuse to form one helium atom. During the fusion process, radiant energy is released.

What happens if hair has static electricity

Answers

Answer:

it goes up

Explanation:

Static hair occurs when your hair builds up an electric charge, meaning it has gained some extra electrons. That makes the strands of your hair repel each other, leaving your hair frizzy and difficult to style.

If the tension in the string is equal to 2 W when the stone is at its lowest point, then the tension when the stone is at the highest point will be

Answers

This question involves the concept of tension, centripetal force, centrifugal force, and weight.

The tension of the stone at the highest point is "0 N".

The centrifugal force always acts away from the circle. The tension always acts toward the support that is the center of the circle in this case. When the stone is at its lowest point, the centrifugal force, and the weight of the stone, both act downward. But the tension is pointing in the upward direction. Hence, the equilibrium equation will be:

[tex]Tension = Weight\ + \ Cenrifugal\ Force\\T = W + F_c\\T = 2\ W\ (given)\\2\ W = W+F_c\\F_c = 2\ W - W\\F_c = W[/tex]

Now, we consider the stone at the top position. Here, the centrifugal force will act in the upward direction (away from the center of the circle), while the weight and tension will be acting in the downward direction. Thus, the equilibrium equation, in this case, will be:

[tex]F_c = W+T\\T=F_c-W\\T = W-W\\[/tex]

T = 0 N

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The attached picture shows the free body diagram of the stone at different locations.

Help ,I wanna know if this is correct or not

Answers

Answer:

it looks correct to me but im not 11% sure

Explanation:

Someone pls help I don’t understand this

Answers

Answer:

[tex]{ \rm{F _{ball \: on \: bat} = - F _{bat \: on \: ball} }}[/tex]

Explanation:

• This is due to the third newtons law of motion which states that "Every action has an equal and opposite reaction".

Which is not poor conductor?

a) pure water

b) Cotton thread

c) plastic spoon

d) metal vase

Answers

Answer:

Metal vase

Explanation:

Pure water is not a good conductor, and neither is plastic or cotton. Metal is the only one of the four that actually is a good conductor. For example, lighting hitting metal, this happens because the lightning connects to anything that has some kind of conductant.

Please help on these two thanks

Answers

Explanation:

Number 29

= 10 N (from rocket) + 10 N (from wheels) - 7 N (from parachute 'cause force in other direction)

= 20 N - 7 N

= 13 N ✔

Number 30

= 100 N - 85 N

= 15 N to the left ✔

Children start to gain control over their attention beginning in preschool. This control is related to a growth
spurt in the brain's lobe.

Answers

Answer:

occipital parietal

Explanation:

Hope this helps, plus I took the test

In the free-body diagram, the magnitude of the normal force is 40 N, the friction force is
25N, the net force is 80N: What is the magnitude of the applied force?

Answers

Answer:

Explanation:

F = 80 + 25 = 105 N

plz help owo

What characteristic is shared by sunspots, solar flares, and coronal mass ejections? Select the two correct responses.


They are caused by outward fluctuations of the sun's magnetic field.

They appear as dark spots on the sun's surface.

They tend to occur during active periods of the solar cycle.

They appear as bright spots on the sun's surface.

Answers

Answer:

They are caused by outward fluctuations of the sun's magnetic field.

They tend to occur during active periods of the solar cycle.

Explanation:

While sun spots will appear darker than the surrounding surface, flares will tend to appear brighter. CME's are associated with massive flares.

The two correct responses are as follows:

They are caused by outward fluctuations of the sun's magnetic field.They tend to occur during active periods of the solar cycle.

The following information should be considered:

At the time when sunspots should appear darker as compared to the surrounding surface, so flares should be appear brighter. CME's are along with massive flares.Due to this, the above answers are considered.

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at 30°c an almunium spher is 30cm³ long
the cofficen linear expansion is 24×10`⁶ if the final volume is 30.5cm³
what's the final temperatur of the almunium sphere​

Answers

Answer:

Change volume / volume = .5 / 30 = .01666

coefficient of volume expansion = 3 * 24E-6 = 72E-6

Change in temp = .0167 / 24E-6 = 232 deg C

Final temp = 232 + 30 = 262 deg C

Change in volume / volume = 3 * coeff linear expansion * change in deg C

1.00 x 10^8 kg of clear liquid (specific heat
capacity = 5.11 x 10^2 J/kg•°C) at a temperature
of 15.0°C gains 3.33 x 10^6 J of heat. What is the
final temperature of the liquid? (Assume the
melting point is less than 15.0°C and the boiling
point is greater than 62.0°C.)

Answers

Please see the answer

Write down the units for the following physical quantities:
a. Velocity
b. Acceleration
c. Momentum
d. Force
e. Power
f. Energy
g. Pressure

Answers

Only one I know

Acceleration- KG

A heavy train of mass 200 tonnes has a maximum speed of 20m/s up a hill inclined at 1.15⁰ to the horizontal when the engine is working at 800 kwatts. What is the resistance to the motion of the train?

Answers

Answer:

https://www.brainlyanswer.com

Explanation:

click the link the answer is in the link:)

Answer:

train to busan

shadow train

the horror train

train game

The weight of an object is 180 N at a distance of 150 km above a planet's center. What is the weight of the object when it moves 450 km above the center of the planet?

Answers

By using Newton law of gravitation, the weight of the object when it moves 450 km above the center of the planet is 20N

Given that the weight of an object is 180 N at a distance of 150 km above a planet's center.

F = GMm/[tex]r^{2}[/tex]

F = mg = 180N

r = 150

When it moves 450 km above the center of the planet, G, M and m will be constant. only r will vary.

180 = GMm/[tex]150^{2}[/tex]

Make GMm the subject of the formula

GMm = 180 x 22500

GMm = 4050000

As it moves 450 km above the center of the planet, Its weight will be

F = GMm/[tex]r^{2}[/tex]

Substitute all the values and parameters

F = 4050000/[tex]450^{2}[/tex]

F = 20 N

Therefore, the weight of the object When it moves 450 km above the center of the planet is 20 Newtons

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Ti3N + MgO → Mg3N2 +Ti2O balance chemical equation

Answers

We have that the balanced chemical equation   is mathematically given as.

2Ti_3N + 3MgO → Mg_3N_2 +3Ti_2O

From the question we are told

Ti3N + MgO → Mg3N2 +Ti2O balance chemical equation.

Generally the way to balance an equation is by making all elements present on the Left hand side(LHS) same with the right hand side RHS.

Therefore

The equation is mathematically given as.

Ti_3N + MgO → Mg_3N_2 +Ti_2O

We consider the Left hand side(LHS) first.

2Ti_3N + 3MgO → Mg_3N_2 +Ti_2O

Then we consider the right hand side RHS.

2Ti_3N + 3MgO → Mg_3N_2 +3Ti_2O

Therefore the balanced chemical equation   is mathematically given as.

2Ti_3N + 3MgO → Mg_3N_2 +3Ti_2O

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A rod is heated at the rate of 30 watts at the middle point and is insulated at its two ends. The two half sections are cooled by convection by an ambient fluid at 20 degree Celsius with a heat transfer coefficient of 30 W/m^2 C. The diameter of the rod is 0.5 cm, its length is 18 cm and its thermal conductivity is 206 W/mC. Determine the temperature in the middle of the rod and at the insulated ends. Please describe your strategy of solving this problem.

Answers

thanks for the points

Explanation:

A train travels meters in the first second of travel, 6 meters again during the second second of travel, and 6 meters again during the third second. Its
acceleration is
O 0 m/s
6 m/s
O 12 m/s/s
18 m/s
O None of the above

Answers

Answer:

0 m/s

Explanation:

there is no acceleration, it's velocity is always 6m/s

so your answer is 0m/s


A substance with a pH value of 2.3 would be classified as
O strong acid
O weak acid
O strong base
O weak base

Answers

weak base i think since it’s a lower ph

A substance with a pH value of 2.3 would be classified as a strong acid. Option A is correct.

What is ph value?

pH stands for "potential hydrogen," and it is a measure of the acidity or basicity (alkalinity) of a solution. The pH scale ranges from 0 to 14, with 7 being neutral (neither acidic nor basic). Solutions with a pH less than 7 are considered acidic, and solutions with a pH greater than 7 are considered basic.

Here,
The pH scale is used to measure the acidity or basicity of a solution. Values on the pH scale range from 0 to 14. Solutions with a pH value less than 7 are considered acidic, and solutions with a pH value greater than 7 are considered basic. The lower the pH value, the more acidic the solution.

A pH value of 2.3 indicates that the solution is strongly acidic, as it is well below the neutral value of 7.

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If a person weighs 160 Newtons on Earth, what is their weight in pounds on Earth?
A. 27
B. 36
C. 712
D. 534

Answers

Answer:

B. 36 lb

Explanation:

m = 160/9.8 = 16.3 kg

16.3 kg ( 2.205 lb/kg) = 36 lb

You are driving to grandma's house, and you are traveling at an average of 70 mph. How long will it take you to travel 70 miles?
O 1 hour
O 1 second
70 hours
O 70 seconds

Answers

Answer: 1 hour

Explanation: Focus on the units; 70 miles per hour means that each hour, you will travel 70 miles

or you can use the equation time = distance/speed. You have 70miles/ 70mph = 1hour

Chọn câu sai :

A. Đồ thị vận tốc theo thời gian chuyển động thẳng đều là một đường song song với trục hoành Ot

B. Trong chuyển động thẳng đều ,đồ thị theo thời gian của tọa độ và của vận tốc đều là những đường thẳng

C. Đồ thị toạ độ theo thời gian của chuyển động thẳng đều bao giờ cũng là một đường thẳng

D. Đồ thị toạ độ theo thời gian của chuyển động thẳng đều là một đường thẳng xiên góc

Answers

P.s this language is: Viatnamese :)

Answer:

This is just to help the other readers help you. Or so that you understand:

Đây là để giúp bạn đọc giúp bạn!

What they tried to say:

Choose the wrong sentence:

A. The velocity-time graph of uniform linear motion is a line parallel to the horizontal axis Ot

B. In uniform linear motion, the time graphs of the coordinates and of the velocity are both straight lines

C. The time-coordinate graph of uniform rectilinear motion is always a straight line

D. The coordinate-time graph of uniform linear motion is an oblique line

Is what they asked you.

Thankyou and your welcome

Vì tôi đã giúp đỡ, tôi có thể vui lòng có cám ơn nào không?

Have a great day!

~Happy helper~


5. Sarah is standing 32.0 m away from Jason. If Sarah throws a snowball at a 45 degree
angle for maximum distance, what velocity must the snowball have to hit Jason directly.
(Assume Jason and Sarah are about the same height so that if she throws the snowball
from head level, it will hit Jason in the head.)

Answers

Answer:

Explanation:

If air resistance is ignored and assume UP and Toward Jason are the positive directions.

horizontal analysis

d = (vx₀)t

t = d/vx₀

horizontal analysis

0 = vy₀t + ½gt²

0 = vy₀(d/vx₀)+ ½g(d/vx₀)²

as vy₀ = v₀sin45 and vx₀ = v₀cos45 and are equal.

0 = d + ½g(d²/v₀²cos²45)

-d = ½g(d²/v₀²cos²45)

-dv₀² = ½g(d²/cos²45)

   v₀² = -½g(d/cos²45)

   v₀² = -½(-9.81(32.0/cos²45)

   v₀² = 313.92

   v₀ = 17.717787...

   v₀ = 17.7 m/s

When a car's acceleration is negative, what is happening to the car's motion?
the car slows down
the car speeds up
the car travels at a constant speed
the car remains at rest

Answers

Answer:

the car slows down

Explanation:

Two skaters face one another and stand motionless, then push against each other on the ice. If one's mass is 55 kg and he moves to the left after the push at a velocity of 4.3 m/s, how fast was the other skater traveling after the push if her mass was 48 kg.​

Answers

Answer:

3.75 m/s

Explanation:

55/4.3 = 48/x

12.8 = 48/x

x = 48 : 12.8

x = 3.75 m/s

#LearnWithEXO

ANSWER:

107.3

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A charged ball has a charge of -3.5x10-17c . How many electrons are found in the ball?

Answers

Answer:

218 electrons

Explanation:

pls find the attached image for solution

How to find force if mass time and distance is given?

Answers

Answer:

For example, speed is a length divided by time. Force is mass times acceleration, and is therefore a mass times a distance divided by the square of a time. We therefore say that [Force] = MLT−2.

HELP me please !!!!

Answers

It’s heavier so it’ll tilt over

In the absence of air resistance, as an object falls freely, its
O velocity increases
O acceleration increases
both A and B
O none of the above

Answers

Answer:

None of the above

Explanation:

None of the above

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