Answer:
D.by convection
Explanation:
Liquids and gases primarily transfer heat through convection. The correct answer is option (D). which is convection.
Convection is the process of heat transfer through the movement of a fluid (liquid or gas). When a fluid is heated, its molecules become energized and move more rapidly, causing the fluid to expand and become less dense. The less dense, warmer fluid then rises while the cooler, denser fluid sinks.
In the case of liquids, this movement is often referred to as natural convection. In gases, convection can occur in two ways: natural convection and forced convection.
Natural convection occurs when the heated gas rises due to its decreased density, while the cooler gas descends. Forced convection involves the use of external forces, such as fans or pumps, to create airflow and enhance heat transfer.
Therefore, Liquids and gases primarily transfer heat through convection. The correct answer is option (D). which is convection.
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A boat moving at a constant speed travels 15 meters in 8 seconds. How far does it travel
in 40 seconds?
O 75 meters
53 meters
335 meters
480 meters
23 14
2. Calculate: You can use trigonometry to find the initial horizontal and vertical components of the ball's
velocity. Take out your calculator now. Click Reset, and turn off Show velocity vector and Show velocity
components. Set Vinitial to 50.0 m/s and 8 to 60.0 degrees.
A.
To calculate vy, multiply Vinitial by the cosine of the angle: V = Viral · cos(O):
B. To calculate vy, multiply Vmisial by the sine of the angle: v, = Vinitial sin(C):
C. Turn on Show velocity components. Were you correct?
Answer:
(A). The horizontal initial velocity is 25 m/s.
(B). The vertical initial velocity is 43.3 m/s.
(C). The velocity component is
[tex]u_{x}=u\cos\theta[/tex]
[tex]u_{y}=u\sin\theta[/tex]
Explanation:
Given that,
Initial velocity = 50.0 m/s
Angle = 60°
We need to calculate the component of velocity
Using formula of component
(A). Horizontal initial velocity
[tex]\cos\theta=\dfrac{u_{x}}{u}[/tex]
Put the value in to the formula
[tex]\cos60=\dfrac{u_{x}}{50}[/tex]
[tex]u_{x}=50\times\cos60[/tex]
[tex]u_{x}=25\ m/s[/tex]
(B). Vertical initial velocity
[tex]\sin\theta=\dfrac{u_{y}}{u}[/tex]
Put the value in to the formula
[tex]\sin60=\dfrac{u_{y}}{50}[/tex]
[tex]u_{y}=50\times\sin60[/tex]
[tex]u_{y}=43.3\ m/s[/tex]
The velocity component is
[tex]u_{x}=u\cos\theta[/tex]
[tex]u_{y}=u\sin\theta[/tex]
Hence, (A). The horizontal initial velocity is 25 m/s.
(B). The vertical initial velocity is 43.3 m/s.
(C). The velocity component is
[tex]u_{x}=u\cos\theta[/tex]
[tex]u_{y}=u\sin\theta[/tex]
data?
11.) Hair color, gender, birthday, softness of a pillow are all examples of
A.) Qualitativel
B.) Quaternary
C.) Quantitatſve
2. the energy of the pendulum as it swings up
O potential energy
O kinetic energy
Greatest Potential
O Greatest Kinetic
PLEASE HELP!!!
What is the sum of all forces that act upon an object called?
a
Net force
b
Balanced force
c
Unbalanced force
d
Gravitational force
Answer:
net force
Explanation:
The net force is the vector sum of all the forces that act upon an object. That is to say, the net force is the sum of all the forces, taking into account the fact that a force is a vector and two forces of equal magnitude and opposite direction will cancel each other out.
Answer:
a
Explanation:
What are 2 examples of convection, 2 examples of conduction and 2 examples of radiation plsss answer
Answer:
this could probably be useful to you
If ice didn't float, but sank instead, this change wouldn't affect aquatic life. true of false
Answer:
No it will not (false)
Explanation:
I say this because if anything the ice will sink and melt from a solid to a liquid and that will lead to i guess more water for the aquatic life. (THIS IS A THEORY SHAWTY)
HELP!!!! WILL MARK BRAINLIEST!!
Fill in the names of the neuron parts and their functions. After you've filled in all the answers, click on
the puzzle pieces next to the answer spaces to check your success
Answer:
A) Dendrite
Receives information from other neutrons and transmits information into the soma/cell body.B) Soma
Contains the nucleus of the neutral cell and maintains chemicals that keep the neutron functioning properly, also provides energy for the cell.C) Axon
Transmits signals away from the soma to other neutrons, muscles, or glands.D) Myelin Sheath
Insulated fatty material that surrounds an axon and speeds up signal transmission.E) Synapse
The junction where neutrons connect to transmit electrical or chemical information.Explanation:
EDG 100%
derive mean in science
Explanation:
derive its name from a Native American word meaning wild onion
The geometry of a hydrogen-bromide molecule is ____.
Answer:
polar-molecule
Explanation:
Use the drop-down menus to complete the statements.
A vertical column of elements in the periodic table is called a .
A horizontal row of elements in the periodic table is called a .
Atoms of elements in the same group have the same .
As you move from left to right on the periodic table, the atomic number .
Explanation:
A vertical column of elements in the periodic table is called a group
A horizontal row of elements in the periodic table is called a period
Atoms of elements in the same group have the same number of valence electrons
As you move from left to right on the periodic table, the atomic number increases
Answer: the first one is group
2. Period
3. Number of valence elections
4. increases
hELP URGENT PLEASEE!!!
Answer:
1. Solid, liquid, gas, plasma
3. latent heat of vaporization
4. melting
6. heat
7. amount of heat transferred when 1g of a substance melts or freezes
Answer:
1. Solid, liquid, gas, plasma
2. In a solid and liquid, the particles are close together. In a solid, the particles are packed close together and are held in a fixed position. ... In liquids, particles are usually almost as close to each other as in solids.
3. latent heat of vaporization
4. melting
5. As the temperature falls, the particles slow down. If a liquid is cooled sufficiently, it forms a solid.
6. heat
7. amount of heat transferred when 1g of a substance melts or freezes
Explanation:
Textbook online
What is the new kinetic energy of the 1900 kg ship on the right moving at 4 m/s?
Answer:
soi nuevo
Explanation:me regalan puntos
Answer:
15,200J
Explanation:
The equation is 1/2 x m x v², where m= mass and v= velocity.
Lien is pushing a box across a table. She used a force of 100 N to get the box moving. Which force did she overcome to get the box moving?
a)the downward force of gravity on the box
b)the upward force of the table on the box
c)the reaction force on the box
d)the push force on the box
We have that from the options, the force require to move the table will be the Reaction force.i.e the force that will get a reaction out of the table i.e is Motion
The reaction force on the box
Correct Option is C
From the question we are told
Lien is pushing a box across a table. She used a force of 100 N to get the box moving
Generally The Force Requird to Move a table is greater than the contiunes force applied to it to en sure it contines in Motion.
Having said that Newtons Third law states for every action there most be an equal and opposite reaction
Therefore
From The options the force require to move the table will be the Reaction for.that is the force that will get a reaction out of the table i.e is Motion
Correct Option is C
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Which explanation is based on scientific evidence?
A. Using ancient techniques, it is possible to change lead into gold.
B. Chemical data collected from rock formations can be used to
determine that Earth is billions of years old.
C. The mineral quartz has properties that help protect the body from
illness.
D. The relative positions of the Sun, Earth, and stars at the time of a
person's birth can affect his or her personality.
Answer:
The answer is B. I hope this helps!
Explanation:
B is the only answer with a scientific explanation. You cannot change lead into gold, quartz can't protect you from illness, and the positions of stars and planets have no effect on a person.
In an aqueous solution where the H+ concentration is 1 x 10-6 M, the OH concentration must be:
A. 14 x 10-6 M
B. 1 x 10-6 M
C. 1 x 10-7 M
D. 1x 10-8 M
E. 14 x 10-8 M
Answer:
D. 1×10⁻⁸ M
Explanation:
[H⁺] [OH⁻] = 10⁻¹⁴
(1×10⁻⁶) [OH⁻] = 10⁻¹⁴
[OH⁻] = 1×10⁻⁸
The concentration of hydroxyl ion will be [tex]10^{-8}[/tex]M.
What is concentration?The amount of a chemical substance in a mixture is expressed by the substance's concentration.
Calculation of concentration.
Given data:
Concentration of H+ = 1 x [tex]10^{-6}[/tex] M.
It is known that,
[[tex]H^{+}[/tex]][[tex]OH^{-}[/tex]] = [tex]10^{-14}[/tex]M
Now, put the value of concentration of [[tex]H^{+}[/tex]] in above equation.
[1× [tex]10^{-6}[/tex]][[tex]OH^{-}[/tex]] = [tex]10^{-14}[/tex]M
[[tex]OH^{-}[/tex]] = [tex]10^{-14}[/tex] / [1× [tex]10^{-6}[/tex]]M
[[tex]OH^{-}[/tex]] = [tex]10^{-8}[/tex]M
Therefore, the concentration of hydroxyl ion will be [tex]10^{-8}[/tex]M.
Hence, the correct answer will be an option (D).
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what is the velocity of a plane that traveled 5000 miles north followed by 10000 miles north in 20 miles?
Answer:
potential energy
Explanation:
potential energy
Chemical energy, the energy stored in chemical bonds, is thus considered a form of potential energy. Some everyday examples of potential energy include the energy of water held behind a dam, or of a person about to skydive out of an airplane.
The velocity of a plane that traveled 5000 miles north followed by 10000 miles north in 20 hours would be 750 miles/hour.
What is Velocity?The total displacement covered by any object per unit of time is known as velocity. It depends on the magnitude as well as the direction of the moving object.
The mathematical expression for velocity is given by
velocity= total displacement/Total time
The total displacement of the plane = 5000 miles +10000 miles
=15000 miles
velocity = displacement/Time
velocity =15000/20 hours
=750 miles/hour
Thus, the velocity of the plane would be 750 miles/hour.
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Your question seems incomplete, the complete question is,
what is the velocity of a plane that traveled 5000 miles north followed by 10000 miles north in 20 hours?
An ideal Carnot engine operates between reservoirs having temps of 125 degrees C and -20.0 degrees C. Each cycle the heat expelled by this engine is used to melt 30.0 g of ice at 0.00 degrees C. The heat of fusion of water is 3.34 X 10^5 J/kg and the heat of vaporization of water is 2.25 x 10^6 J/kg. How much work is does this engine do each cycle? How much heat per cycle does this engine absorb at the hot reservoir?
Answer:
Q₁ = 15.78 KJ
W = 5.76 KJ
Explanation:
First we find efficiency of this ideal Carnot engine:
Efficiency = 1 - T₂/T₁
T₁ = source temperature = 125°C + 273 = 398 K
T₂ = Sink Temperature = -20°C + 273 = 253 K
Therefore,
Efficiency = 1 - 253 K/398 K
Efficiency = 0.365 = 36.5%
Now, we find expelled heat (Q₂), by using latent heat of fusion of ice:
Q₂ = mH
where,
m = mass of ice melted = 30 g = 0.03 kg
H = Latent Heat of Fusion of Ice = 3.34 x 10⁵ J/kg
Therefore,
Q₂ = (0.03 kg)(3.34 x 10⁵ J/kg)
Q₂ = 1.002 x 10⁴ J = 10.02 KJ
Now, we use another formula of efficiency to find absorbed heat (Q₁):
Efficiency = 1 - Q₂/Q₁
0.365 = 1 - 10.02 KJ/Q₁
10.02 KJ/Q₁ = 1 - 0.365
Q₁ = 10.02 KJ/0.635
Q₁ = 15.78 KJ
Now, for work done we have the formula:
W = Q₁ - Q₂
W = 15.78 KJ - 10.02 KJ
W = 5.76 KJ
An arrow is shot at 27.0° above the horizontal. Its velocity is 54 m/s, and it hits the target.
Explanation:
(a) What is the maximum height the arrow will attain?
Given:
v₀ᵧ = 54 sin 27.0° m/s = 24.5 m/s
vᵧ = 0 m/s
aᵧ = -9.8 m/s²
Find: Δy
vᵧ² = v₀ᵧ² + 2aᵧΔy
(0 m/s)² = (24.5 m/s)² + 2 (-9.8 m/s²) Δy
Δy = 30.7 m
(b) The target is at the height from which the arrow was shot. How far away is it?
Given:
Δy = 0 m
v₀ᵧ = 54 sin 27.0° m/s = 24.5 m/s
aᵧ = -9.8 m/s²
Find: t
Δy = v₀ᵧ t + ½ aᵧt²
0 m = (24.5 m/s) t + ½ (-9.8 m/s²) t²
t = 5.00 s
Given:
v₀ₓ = 54 cos 27.0° m/s = 48.1 m/s
aₓ = 0 m/s²
t = 5.00 s
Find: Δx
Δx = v₀ₓ t + ½ aₓt²
Δx = (48.1 m/s) (5.00 s) + ½ (0 m/s²) (5.00 s)²
Δx = 241 m
Ice has a density of 0.920 g/cm3. An ice cubes mass is 100 g. What is its volume?
Answer:
[tex]\boxed {\tt 108.695652 \ cm^3}[/tex]
Explanation:
Volume can be found by dividing the mass by the density.
[tex]v=\frac{m}{d}[/tex]
The mass is 100 grams and density is 0.920 grams per cubic centimeters.
Therefore,
[tex]m=100 \ g \\d= 0.920 \ g/cm^3[/tex]
Substitute the values into the formula.
[tex]v=\frac{100 \ g}{0.920 \ g/cm^3}[/tex]
Divide. Note that the grams, or "g" will cancel each other out.
[tex]v- 108.695652 \ cm^3[/tex]
The volume of the ice cube is 108.697652 cubic centimeters.
Mountains can ONLY be formed by continental crust colliding?
True
False
Answer
:Fold mountains are often associated with continental crust. They are created at convergent plate boundaries, sometimes called continental collision zones or compression zones. Convergent plate boundaries are sites of collisions, where tectonic plates crash into each other.
1. When human bones are brittle due to eating too much dairy food, what is this called?
2. When a person is working out and they get dry mouth, dizziness, and lack of sweat, what is happening to them.
3. when the arteries of the human heart are clogged by years of plaque build up and the heart can not pump blood through the body correctly, what is this called?
4. Exercises like swimming and bike riding can be put in what exercise category?
5. Eating too much processed food can lead to you getting what?
6. Eating too much meet can lead to you getting what?
Answer:
1. Osteoporosis
2. Dehydration
3. Atherosclerosis
4. Aerobic exercise
5. Heart disease, obesity, diabetes and high blood pressure
6. Coronary heart disease, colorectal cancer, diabetes
Explanation:
1. Osteoporosis is the condition of the bones when they become easily fractured and less dense, such that injuries to the bones are likely to cause disability or pain
2. The bod becomes dehydrated in the event that there is insufficient water for proper functioning of the organs due to the loss of more water than the water that is taken in or absorbed.
3. Atherosclerosis is the building of plaque on the inside and outside of the walls of the arteries by cholesterol, fat, and other compounds in the blood often being taken as a problem or undesirable condition of the heart.
4. Processed foods are those that contain chemicals (that give them a good taste) in proportions that can cause illnesses
5. Taking large quantities of (red) meat such as burgers, or barbecued red meat, can lead to type 2 diabetes, cancers and stroke
Odysseus has returned from his epic voyage across the seas and gets off his boat at the end of a 50 meter pier. His beloved Penelope is waiting at the far side of the pier, at the origin. At the same time they see each other and race towards each other, meeting in a fierce embrace. Odysseus, exhausted from his journey, is able to run at 4 m/s, while Penelope can run at 6 m/s. Write an equation of motion for Odysseus.
Answer:
We know that:
Distance between Odysseus and Penelope = 50m
Speed of Odysseus = So = 4m/s
Speed of Penelope = Sp = 6m/s.
Now we want to find the equation of motion for Odysseus.
First, let's find the amount of time that he is moving, we know that when he meets with Penelope, he will stop moving.
Now they weel meet each other when the total distance traveled by both of them is equal to 50m.
Then, recalling that:
Distance = Time*speed.
50m = 4m/s*t + 6m/s*t = 10m/s*t
t = 50m/10m/s = 5s
They will move for 5 seconds.
Now we can write the movement equation for Odysseus as:
p(t) = 4m/s*t + p0 for (0s ≤ t ≤ 5s)
Where p0 is the initial position of Odysseus, and because we can put our coordinate axis where we want, we can define p0 = 0m.
Then the position of Odysseus is:
P(t) = 4m/s*t if 0s ≤ t ≤ 5s
P(t) = 4m/s*5s = 20m if t > 5s.
The second piece says that for t larger than 5 seconds, he will not move (at least for a given amount of time)
can someone please help me I don’t understand how i’m supposed to solve this
Answer:
the net force is 10 and it is pushing to the right
Explanation:
The net force is the total and sonce the 20N is overpowering the 10N it will have 10N which will put the 20N ahead
What is the height where a 110.8 kg woman would have a gravitational potential energy of 8741 J?
Answer:
8.042m
Explanation:
Ep = mgh
given that ,
m = 110.8kg
h =?
g = 9.81 m/s^2
Ep= 8741J
8741= 110.8 × 9.81 × h
h= 8741 ÷ ( 110.8 × 9.81 )
h = 8.042m
The properties of a rectangular prism are listed below:
Density = 120 g/cm with an exponent of 3
Length = 4 cm
Width = 2 cm
Height = 1 cm
What is the mass of the rectangular prism?
a
15 g
b
45 g
c
960 g
d
980 g
WILL GIVE BRAINLIEST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!TO THE FIRST PERSON WHO ANSWERS!!!!!!!!!!!!!!!!!!!!!
Answer:
B. 45 g because it is the given answer of the division that is given to the equation
if a big stone and a small stone is dropped simultaneously from the certain height. they fall together why??
Because it takes more force to accelerate a mass, and gravity exerts more force on a greater mass. So every object winds up with the same acceleration.
And THAT, of course, says that all objects in the same gravity will pick up the same speed in the same time, and fall the same distance in the same time.
what is modulus of elasticity for shearing stress and strain called?
mechanical advantage of a first class Lever can be one or greater than one or less than one why
Explanation:
Because they change the direction of force and multiply the effort.
They increase the rate of doing work.
So, MA of first class lever can be one or greater than one or less than one
Todd and Angela set up a ramp and released several cars from the top. If Todd and Angela want to determine the average speed of their cars down the ramp, what information do they need? Group of answer choices
Answer:
The ramps length, height, degree, and the weight of the car.
Explanation:
Answer:
I think they need the slope of the ram(degree) .
& current gravitational acceleration
& the length of the ram and also l don't think mass of the cars are not needed becoz the acceleration of the cars are given by its,
Gravitational acceleration * sin( slope).
So then use that in v^2=u^2+2as equation.
s for length
a for acceleration
v for end velocity
u for start velocity
