Answer:
4.545 A
Explanation:
From the question,
Using,
P = VI....................... Equation 1
Where P = power of the heater, V = Voltage supply, I = Electric current that flows through the heater
make I the subject of the equation above
I = P/V.................. Equation 2
Given: P = 1000 watt, V = 220 volt.
Substitute these values into equation 2
I = 1000/220
I = 4.545 A
While traveling north on an expressway, a car traveling 60 mph (miles per hour) slows down to 30 mph in 12 minutes
due to traffic conditions. Calculate the acceleration.
Answer:
the acceleration is 2.5 MPH over 12 mins.
Explanation:
30 MPH in 12 minutes=
30/12=
2.5
What is the smallest height needed to make a wave?
A
6 feet
B
90 millimeters
C
20 millimeters
D
any height
the answer for this question is 6 feet
A wave can be made at any magnitude of amplitude. Therefore, the smallest height needed to make a wave is at any height. The correct answer is option D
A wave is a disturbance which travels through a medium transferring energy from one point to another without causing any permanent displacement of the medium.
The height needed by a wave is its amplitude. We can define amplitude as the maximum displacement of wave from original position.
A wave can be made at any magnitude of amplitude. Therefore, the smallest height needed to make a wave is at any height.
The correct answer is option D
Learn more here : https://brainly.com/question/446219
A sample of monatomic ideal gas occupies 5.00 L at atmospheric pressure and 300 K (point A). It is warmed at constant volume to 3.00 atm (point B). Then it is allowed to expand isothermally to 1.00 atm (point C) and at last compressed isobarically to its original state. (a) Find the number of moles in the sample. moles (b) Find the temperature at point B. K (c) Find the temperature at point C. K (d) Find the volume at point C. L (e) Now consider the processes A → B, B → C, and C → A. Describe just how to carry out each process experimentally. This answer has not been graded yet. (f) Find Q, W, and ΔEint for each of the processes. Q (kJ) W (kJ) Eint (kJ) A → B B → C C → A (g) For the whole cycle A → B → C → A, find Q, W, and ΔEint. Q = kJ W = kJ Eint = kJ
Answer:
(a) 0.203 moles
(b) 900 K
(c) 900 K
(d) 15 L
(e) A → B, W = 0, Q = Eint = 1,518.91596 J
B → C, W = Q ≈ 1668.69974 J Eint = 0 J
C → A, Q = -2,531.5266 J, W = -1,013.25 J, Eint = -1,518.91596 J
(g) ∑Q = 656.089 J, ∑W = 655.449 J, ∑Eint = 0 J
Explanation:
At point A
The volume of the gas, V₁ = 5.00 L
The pressure of the gas, P₁ = 1 atm
The temperature of the gas, T₁ = 300 K
At point B
The volume of the gas, V₂ = V₁ = 5.00 L
The pressure of the gas, P₂ = 3.00 atm
The temperature of the gas, T₂ = Not given
At point C
The volume of the gas, V₃ = Not given
The pressure of the gas, P₃ = 1 atm
The temperature of the gas, T₂ = T₃ = 300 K
(a) The ideal gas equation is given as follows;
P·V = n·R·T
Where;
P = The pressure of the gas
V = The volume of the gas
n = The number of moles present
R = The universal gas constant = 0.08205 L·atm·mol⁻¹·K⁻¹
n = PV/(R·T)
∴ The number of moles, n = 1 × 5/(0.08205 × 300) ≈ 0.203 moles
The number of moles in the sample, n ≈ 0.203 moles
(b) The process from points A to B is a constant volume process, therefore, we have, by Gay-Lussac's law;
P₁/T₁ = P₂/T₂
∴ T₂ = P₂·T₁/P₁
From which we get;
T₂ = 3.0 atm. × 300 K/(1.00 atm.) = 900 K
The temperature at point B, T₂ = 900 K
(c) The process from points B to C is a constant temperature process, therefore, T₃ = T₂ = 900 K
(d) For a constant temperature process, according to Boyle's law, we have;
P₂·V₂ = P₃·V₃
V₃ = P₂·V₂/P₃
∴ V₃ = 3.00 atm. × 5.00 L/(1.00 atm.) = 15 L
The volume at point C, V₃ = 15 L
(e) The process A → B, which is a constant volume process, can be carried out in a vessel with a fixed volume
The process B → C, which is a constant temperature process, can be carried out in an insulated adjustable vessel
The process C → A, which is a constant pressure process, can be carried out in an adjustable vessel with a fixed amount of force applied to the piston
(f) For A → B, W = 0,
Q = Eint = n·cv·(T₂ - T₁)
Cv for monoatomic gas = 3/2·R
∴ Q = 0.203 moles × 3/2×0.08205 L·atm·mol⁻¹·K⁻¹×(900 K - 300 K) = 1,518.91596 J
Q = Eint = 1,518.91596 J
For B → C, we have a constant temperature process
Q = n·R·T₂·㏑(V₃/V₂)
∴ Q = 0.203 moles × 0.08205 L·atm/(mol·K) × 900 K × ln(15 L/5.00 L) ≈ 1668.69974 J
Eint = 0
Q = W ≈ 1668.69974 J
For C → A, we have a constant pressure process
Q = n·Cp·(T₁ - T₃)
∴ Q = 0.203 moles × (5/2) × 0.08205 L·atm/(mol·K) × (300 K - 900 K) = -2,531.5266 J
Q = -2,531.5266 J
W = P·(V₂ - V₁)
∴ W = 1.00 atm × (5.00 L - 15.00 L) = -1,013.25 J
W = -1,013.25 J
Eint = n·Cv·(T₁ - T₃)
Eint = 0.203 moles × (3/2) × 0.08205 L·atm/(mol·K) × (300 K - 900 K) = -1,518.91596 J
Eint = -1,518.91596 J
(g) ∑Q = 1,518.91596 J + 1668.69974 J - 2,531.5266 J = 656.089 J
∑W = 0 + 1668.69974 J -1,013.25 J = 655.449 J
∑Eint = 1,518.91596 J + 0 -1,518.91596 J = 0 J
F4
30. CHALLENGE A disk with a moment of inertia
of 0.26 kg ma is attached to a smaller disk
mounted on the same axle. The smaller disk has
a diameter of 0.180 m and a mass of 2.5 kg.
A strap is wrapped around the smaller disk,
as shown in Figure 14. Find the force needed
to give this system an angular acceleration of
2.57 rad/s?
Answer:
7.42 N
Explanation:
We know that:
τ = Iα = rF
Variables:
I = 0.26 kgm^2
α = 2.57 rad/s^2
r = 0.18m/2 = 0.09m
Solve:
τ = Iα = rF
τ = (0.26kgm^2) (2.57rad/s^2) = (0.09m) * F
F = 7.42 N
Mark brainliest if this helped!
Select three possible applications of a capacitor. Select all that apply.
- electrical test meter
- camera flash
- computer battery
- motor starter
Answer:
I'm pretty sure it's all of them i'm not completely sure though hope it helps anyways! :)
On the periodic table, the elements in the columns have the same number of —
a)protons in their outer shells.
b)electrons in their outer shells.
c)neutrons.
d)electrons.
Answer:
· Periodic table, in full periodic table of the elements, in chemistry, the organized array of all the chemical elements in order of increasing atomic number —i.e., the total number of protons in the atomic nucleus. When the chemical elements are thus arranged, there is a recurring pattern called the “periodic law” in their properties, in which elements in the same column (group) have similar properties.
its d btw
Marking brainliest please help
Answer:
increase to four times its initial value
hope this helps you ☺️☺️
What is social participation? Why is it important for socialization?
Answer:
I hope it helped u
stay safe stay happy
We know the role of Sun in our solar system and its importance to life on Earth. What would have happened if the Sun were bigger or smaller than it is now?
Answer:
If for any reason the Sun shrank smaller than the Earth, this shrunken Sun wouldn't have the mass to create fusion and would burn out completely. Our solar system would lose its only star. ... Earth's mass would be at least 333,000 times bigger than it is now. Imagine the gravity that planet would have.
Explanation:
What is the differents between climate and weather
weather is short term while climate is over long periods of time.
for example during the winter it is cold which is the climate, but on some days it is warm which is the weather
pls help me with this one
Answer :
The answer is clearly C
Explanation:
Because the only way currents move are to the side
What does the force of gravity do for us?
Answer:
Earth's gravity is what keeps you on the ground and what makes things fall. Anything that has mass also has gravity. Objects with more mass have more gravity.
Explanation:
why do racing cars have wider wheels?
Answer:
So they can last longer and have more grip than normal on-road cars. They need that in order for them to run well
Explanation:
Answer:
Sports cars have large wheels to provide better road traction and grip. Since most sports cars are intended for racing around the track and doing high speed cornering maneuvers, the added stability increases your confidence to go faster. Slapping on new, larger wheels also enhances the overall look of your sports car.
Explanation:
Hello Mate, Here's your answer...
HELP ME ASAP PLZZZZ!!!!!!!!!!! In which reaction are the atoms of elements rearranged?
A.) Two isotopes of hydorgen fuse to form heluim
B.) A neutron fuses with plutonium-239
C.) Uranium-235 breaks apart into krypton
D.) Sodium combines with chlorine to form sodium chloride
Answer:
D.
Explanation:
Answer:
C. sodium combines with chlorine to form sodium chloride
Explanation:
Pls help! Thx!! Has anyone done the Hurricane Motion Gizmo??? If so, I could really use some help.
Answer:
Please post the question(s). We can provide you more help that way. Thanks
Explanation:
How much work in joules is required to lift a 23 kg box up from the ground to your waist that is 1.0 meters high, carry it 6 meters horizontallyy across the room and place it on a shelf that is 5.7 meters off the ground? Do not type units. Round your answer to te tnths place
Answer:
2682
Explanation:
Work done is given by :
Work = Force x distance
= mg x d
So, work done in lifting the box of 23 kg up to my waist of 1 m high is :
W = mg x d
= 23 x 9.18 x 1
= 211.14
Now work done carrying the box horizontally 6 meters across the room is
W = mg x d
= 23 x 9.18 x 6
= 1266.84
Work done in placing the box on the shelf that is 5.7 m above the ground is
W = mg x d
= 23 x 9.18 x 5.7
= 1203.49
So the total work done is = 211.14 + 1266.84 + 1203.49
= 2681.47
= 2682 (rounding off)
Can an object have both kinetic energy and gravitational potential energy? Explain.
Number 10. But I would like all of them so I can double check. Thank you.
Answer:
C=0.4m/s
a=v/t
0.1=v/4.0
v=0.1*4.0
V=0.4m/s
An image is a copy of an object formed by ____
light.
The answer is: Reflected
Explanation:
An image is a copy of an object that is formed by reflected (or refracted) light. Regular reflection occurs when light reflects off a very smooth surface and forms a clear image. Diffuse reflection occurs when light reflects off a rough surface and forms a blurry image or no image at all.
in series connection if one lamp is off the rest will be off
true or false. pls answer fast
Answer:
yes I think
Explanation:
because lamp is connected to eac other
write any three advantages of using simple machine
Answer:
Simple machines are useful because they reduce effort or extend the ability of people to perform tasks beyond their normal capabilities. Simple machines that are widely used include the wheel and axle, pulley, inclined plane, screw, wedge and lever.
advantage
Increase the amount of force applied to an object.
increase the distance and speed an object moves.
Transfer a force from one place to another.
Change the direction of a force.
Answer:
It saves on time
It reduces the energy used in that activity
It is available and affordable
Explanation:
Mark me as brainliest please
. Determinar la magnitud de la fuerza que recibe un cuerpo de 45 kg, la cual le produce una aceleración cuya magnitud es de 5 m/s2.
Answer:
225 N
Explanation:
Según la segunda ley de Newton;
F = ma
F = fuerza
m = masa
a = aceleración
Por eso;
F = 45 kg * 5 m / s ^ 2
F = 225 N
Is work being done when you carry something?
Answer:
Yes you are using energy to carry that thing.(Force is applied)
Explanation:
In which part of the EM spectrum do you see the colors red, orange, yellow, green, blue, indigo, and violet (ROYGBIV);
gamma rays
ultraviolet rays
microwaves
visible light
Answer:
gamma rays
Explanation:
hope it helps
Given that Qc = 100J and QH = 250J, what is the work done?
Answer:
the work done is 150 J.
Explanation:
Given;
heat energy from the hot reservoir, QH = 250 J
heat energy from the cold reservoir, Qc = 100 J
Let the work done = W
The work done is calculated as follows;
W = QH - Qc
W = 250 J - 100 J
W = 150 J
Therefore, the work done is 150 J.
Please answer ASAP!
According to Newton's First Law (the Law of Inertia) -
Group of answer choices
when you kick a soccer ball, the ball pushes back against your foot.
when you hit a baseball, the bat can vibrate your hands.
when you push a shopping cart that is still, or at rest, it rolls forward.
when you lean back against a chair, the chair pushes back against your back.
Answer:
Letter C
Explanation:
That is newton's first law
Generators convert mechanical energy to electrical energy by using _________.
Answer:
Magnetic Induction.
Explanation:
That be your answer.
simplify
3+7b+2+2b
I need to learn how to simplify please
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Answer:
Let's simplify step-by-step.
3 + 7b + 2 + 2b
Combine Like Terms:
= 3 + 7b + 2 + 2b
= ( 7b + 2b ) + ( 3 + 2 )
= 9b + 5
Answer:
= 9b + 5
<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3
(v) Which of the following is incorrect statement?
(a) A concave mirror can form a magnified virtual image.
(b) A convex mirror can form a magnified real image.
(c) A concave mirror can form a diminished real image.
(d) A convex mirror can form a diminished virtual image.
Answer:
(b) A convex mirror can form a magnified real image.
Explanation:
A convex mirror only forms diminished/highly diminished, virtual and erect image.
Hope it helps.
Please help help pls :::
Answer:
radio since they use radio telescopes.