Answer:
true
Explanation:
I did this unit for science
The equation of a displacement time-curve of a particle is given as x=〖10t〗^2, the instantaneous velocity at t= 1s is *
please find ur answer in the attached image, mark as brainliest if it helps.
Se tienen 500g de alcohol etílico a una temperatura de -40 °C ¿Cuánto calor se necesita para transformarlo a vapor a una temperatura de 150ºC?
The question is: You have 500g of ethyl alcohol at a temperature of -40 ° C. How much heat is needed to transform it into steam at a temperature of 150ºC?
Answer: 233700 J heat is needed to transform ethyl alcohol into steam at a temperature of [tex]-40^{o}C[/tex] to [tex]150^{o}C[/tex].
Explanation:
Given: Mass = 500 g
Initial temperature = [tex]-40^{o}C[/tex]
Final temperature = [tex]150^{o}C[/tex]
The standard value of specific heat of ethyl alcohol is [tex]2.46 J/g ^{o}C[/tex].
Formula used to calculate the heat energy is as follows.
[tex]q = m \times C \times (T_{2} - T_{1})[/tex]
where,
q = heat energy
m = mass of substance
C = specific heat
[tex]T_{1}[/tex] = initial temperature
[tex]T_{2}[/tex] = final temperature
Substitute the values into above formula as follows.
[tex]q = m \times C \times (T_{2} - T_{1})\\= 500 g \times 2.46 J/g^{o}C \times [150 - (-40)]^{o}C\\= 233700 J[/tex]
Thus, we can conclude that 233700 J heat is needed to transform ethyl alcohol into steam at a temperature of [tex]-40^{o}C[/tex] to [tex]150^{o}C[/tex].
Hey guys...please help me with both b) and c) in this question.
Answer:
we cant draw plz show to any one
What is the primary type of battery we use today to store energy?
(PLEASE DO NOT GIVE ME ANY LINK, JUST TYPE YOU ANSWER)
Lithium-Ion batteries are commonly used in portable electronics and electric vehicles. These rechargeable batteries have two electrodes: one that's positively charged and contains lithium and another negative one that's typically made of graphite.
Answer:
Lithium-Ion: Li-ion batteries are commonly used in portable electronics and electric vehicles. These rechargeable batteries have two electrodes: one that's positively charged and contains lithium and another negative one that's typically made of graphite.
Explanation:
Hope this helps :)
Have a great day!
Brainliest?
In electric motors and electric generators, which part is responsible for transferring current from the power source to the commutator or from the slip rings to where the electricity is needed? armature brush axle magnet
Answer:
brush
Explanation:
its correct
Answer:
B. Brush
Explanation:
Edg 2021
Which of the following regions of the electromagnetic spectrum has the highest energy
(among the 4 listed here)?
A. Visible light
B. Radio waves
C. Infared light
D. UV light
The maximum energy is found in visible light from the following areas of the electromagnetic spectrum. Option A is correct.
What is the electromagnetic spectrum?The electromagnetic spectrum is seen as colors violet, indigo, blue, green, yellow, orange, and red. Blue light has a very short wavelength, and so produces a higher amount of energy.
Blue light in the visible zone has a very short wavelength. So that it produces a higher amount of energy that's why the blue part of visible light transfers the most energy.
Visible light from the following regions of the electromagnetic spectrum has the highest energy.
Hence, option A is correct.
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A motor develops 80 kW of power as it lifts a loaded elevator 20.5 m in 45 s. How much force does the motor exert? *
Answer:
F=1.3⋅105N
Explanation:
It's common knowledge.
Explain why the temperature of the water stays constant
Answer:
When boiling occurs, the more energetic molecules change to a gas, spread out, and form bubbles. ... In addition, gas molecules leaving the liquid remove thermal energy from the liquid. Therefore the temperature of the liquid remains constant during boiling.
Answer:
nice
Explanation:
When matter changes shape, does its mass change?
Answer:
No, the mass of an object is always the same, even if a chemical reaction happens or the object becomes denser.
Explanation:
Will mark brainliest
A 0.00287 C charge is 6.52 m from
a -0.00555 C charge. What is their
electric potential energy? Include
the correct sign (+ or -).
hy
(Unit = J)
Answer:
I know dude
Explanation:
-22000
Answer:
-22000
Explanation:
acellus
Two resistors, R1 = 25.0 ohms and
R2 = 64.0 ohms, are connected in
parallel. R1 has a 0.200 A current
flowing through it. What is the current
through R2?
Answer: 0.078
Explanation:
Given variables:
R1 = 25.0 , R2 = 64.0 , I1 = 0.200
Step 1: find V
0.200 = v/25
0.200 * 25 = v
5 = v
Step 2: Solve for I2
I = V/R
I = 5/64
I = 0.078125
Hope this helps!
All the sources of energy present on the earth are the outcomes of solar energy .Justify this statement with example
Answer:
because all the energy is directly depend on solar .. like light energy .. wind energy.. heat energy.. etc..
Explanation:
A 6.00 volt battery is in a circuit with two resistors, A and B, connected in parallel. If the current flowing
out of the battery is 90.0 mA, what is the value in ohms of B if A is 100 ?
Answer: [tex]200\Omega[/tex]
Explanation:
Given
The battery used is 6V in magnitude
The current flow is 90 mA
If the resistance of A is [tex]100\Omega[/tex]
Net resistance of the circuit is
[tex]R_{net}=\dfrac{V}{I}\\\\\Rightarrow R_{net}=\dfrac{6}{90\times 10^{-3}}\\\\\Rightarrow R_{net}=\dfrac{200}{3}\Omega[/tex]
If A and B are in parallel then their net resistance must be [tex]\frac{200}{3}[/tex]
[tex]\dfrac{1}{\frac{200}{3}}=\dfrac{1}{100}+\dfrac{1}{R_b}\\\\\Rightarrow \dfrac{1}{R_b}=\dfrac{3}{200}-\dfrac{1}{100}\\\\\Rightarrow \dfrac{1}{R_b}=\dfrac{3-2}{200}\\\\\Rightarrow R_b=200\Omega[/tex]
which type of motion occur in a lift in one word
Pls answer
Answer:
Explanation:
Lift occurs when a moving flow of gas is turned by a solid object. The flow is turned in one direction, and the lift is generated in the opposite direction, according to Newton's Third Law of action and reaction. Because air is a gas and the molecules are free to move about, any solid surface can deflect a flow.
A 45kg person is standing at the top of a 15m building. If the person falls and lands on a trampoline with a spring constant of 55,000 N/m how much would the trampoline stretch?
[tex]\displaystyle \triangle x = 0.904353 \ m[/tex]
General Formulas and Concepts:Physics
Energy
Gravitational Potential Energy Formula: [tex]\displaystyle U_g = mgh[/tex]
m is mass (in kg)g is gravity (9.8 m/s²)h is height (in m)Spring Potential Energy Formula: [tex]\displaystyle U_k = \frac{1}{2}k \triangle x^2[/tex]
k is spring constant (in N/m)Δx is displacement (in m)Law of Conservation of Energy
Math
Pre-Algebra
Order of Operations: BPEMDAS
BracketsParenthesisExponentsMultiplicationDivisionAdditionSubtractionLeft to RightEquality Properties
Multiplication Property of EqualityDivision Property of EqualityAddition Property of EqualitySubtraction Property of EqualityExplanation:Step 1: Define
Identify
[Law of Conservation of Energy] [tex]\displaystyle U_g = U_k[/tex] → [tex]\displaystyle mgh = \frac{1}{2}k \triangle x^2[/tex]
[Given] m = 45 kg
[Given] h = 15 m
[Given] k = 55000 n/m
[Solve] Δx
Step 2: Solve for Δx
Substitute in variables [Law of Conservation of Energy]: [tex]\displaystyle (45 \ kg)(9.8 \ m/s^2)(15 \ m) = \frac{1}{2}(55000 \ N/m) \triangle x^2[/tex]Multiply: [tex]\displaystyle (441 \ kg \cdot m/s^2)(15 \ m) = \frac{1}{2}(55000 \ N/m) \triangle x^2[/tex]Multiply: [tex]\displaystyle 22491 \ J = \frac{1}{2}(55000 \ N/m) \triangle x^2[/tex]Multiply: [tex]\displaystyle 22491 \ J = (27500 \ N/m) \triangle x^2[/tex][Division Property of Equality] Divide 27500 N/m on both sides: [tex]\displaystyle 0.817855 \ m^2 = \triangle x^2[/tex][Equality Property] Square root both sides: [tex]\displaystyle 0.904353 \ m = \triangle x[/tex]Rewrite: [tex]\displaystyle \triangle x = 0.904353 \ m[/tex]Topic: AP Physics 1 - Algebra Based
Unit: Energy
Book: College Physics
If the effort distance = 8 meters and the resistance distance = 1/2 meter. How much force does this man have to apply to lift the 1 ton (2000 N) weight?
Answer:
Explanation:
Effort x effort distance = load x resistance distance
effort distance = 8 m ,
load = 2000N
resistance distance = 1/2 m = 0.5 m
Putting the values in the equation above
effort x 8m = 2000N x .5
effort = 2000 x 0.5 / 8
= 125 N
force required = 125 N .
solar wind
?
a stream of plasma
coronal mass
ejections
2
includes prominences and
solar flares
gamma ray
photon
?
energy released during
nuclear fusion
Answer:
1. Solar wind: a stream of plasma.
2. Coronal mass ejection: includes prominences and solar flares.
3. Gamma ray photon: energy released during nuclear fusion.
Explanation:
1. Solar wind: a stream of plasma i.e charged particles such as ions, protons, alpha, and electrons that continuously escape at high speed from the Sun because of the very hot plasma contained in the solar corona.
2. Coronal mass ejection: includes prominences and solar flares that flow outward into interplanetary space. Thus, it's a release of solar wind plasma and magnetic field from the outer atmosphere or corona of the sun.
Additionally, a solar prominence is also known as filament and it can be defined as a large, bright, dense cloud of luminous ionized gas such as hydrogen, sodium calcium, etc., that erupts (extends) from the surface of the sun. It can linger in the corona for a very long time, reaching hundreds of thousands of kilometers into the sun's atmosphere (space).
3. Gamma ray photon: energy released during nuclear fusion of radioactive isotopes such as cobalt-60 or cesium-137. It has the shortest wavelength and highest energy in the electromagnetic radiation spectrum.
An electromagnetic spectrum refers to a range of frequency and wavelength that an electromagnetic wave is distributed or extends. The electromagnetic spectrum comprises of gamma rays, visible light, ultraviolet radiation, x-rays, radio waves, and infrared radiation.
Motion only occurs if someone is there to witness an object moving
Answer:
True
Explanation:
Motion is change with time of the position or orientation of a body with respect to an observer
MARK ME BRAINLIEST THANKS MY ANSWER PLEASE
5. What is the amount of work done when JoAnne throws a baseball 6.5 meters at a force of 40 newtons?
Answer:
W = 260 J
Explanation:
Work is defined by
W = F. d
Bold type indicates vectors,
W = F d cos θ
where tea is the angle between the force and the displacement, in this case the force is parallel to the displacement so the angle is zero and the
cos 0=1
let's calculate
W = 40 6.5
W = 260 J
A sled slides down a hill with friction between the sled and hill but negligible alr resistance. Which of the following must be correct about the resulting change in energy of the sled Earth system?
A) The sum of the kinetic energy and the gravitational potential energy changes by an amount equal to the energy dissipated by friction,
B)The gravitational potential energy decreases and the kinetic energy is constant.
C)The decrease in the gravitational potential energy is equal to the increase in kinetic energy
D)The gravitational potential energy and the kinetic energy must both decrease.
Answer:
A) The sum of the kinetic energy and the gravitational potential energy changes by an amount equal to the energy dissipated by friction,
Explanation:
The kinetic energy is the energy that the object has and is defied by the work that is needed to accelerate the body. The gravitational potential is a mechanism by which an equal amount of energy is being transferred per unit mass that is needed for the object to move from the specific location.Hence when the sled moves down the hill with the force of gravity it has negligible resistance as an equal amount of energy is dissipated.The sum of the kinetic energy and the gravitational potential energy changes by an amount equal to the energy dissipated by friction.
What is principle of conservation of energy?The principle of conservation of energy states that, the total mechanical energy of an isolated system is always conserved.
When a sled slides down a hill with friction between the sled and hill but negligible air resistance.
The sum of the kinetic energy and the gravitational potential energy changes by an amount equal to the energy dissipated by friction.
Learn more about kinetic energy here: https://brainly.com/question/25959744
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A wave has an amplitude of 0.2 cm.
What does this mean?
Select one:
- The horizontal distance between a crest and a trough is 0.2 cm.
- The distance between the resting point and the maximum height of the wave is 0.2 cm.
- The distance between two crests is 0.2 cm.
- The vertical distance between a crest and a trough is 0.2 cm.
HOW DO WE HELP OTHERS NOT BE SAD IF THEY DON'T LIKE HUGS?
WOULD DISLIKES FOR HUGS BE RELEVANT TO THE LIKE FOR HUG TOYS?
Explanation:
hug is not the only solution to help someone you can take them to Peaceful place and sit with them saying nothing.
A force is acting on a 3-kg object during 5 seconds. If the object initially has a speed of 1.5m/s and after applying the force its speed is 4 m/s
Answer:
1.5 N
Explanation:
You've left us to guess what the question is. I will Assume it is what's the force?
Givens
m = 3 kg
vi = 1.5 m/s
vf = 4 m/s
t = 5 seconds
Formula
F = m * (vf - vi)/t
Solution
F = 3 * (4 - 1.5) / 5
F = 1.5 N
What period did the first plants appear
Answer:
Ordovician
Explanation:
Answer:
Ordovician: 470 million years ago
A motor-cycle rider going 90km/hr around a curve with a radius of 100m must lean at an angle to the vertical. The angle at which he leans is *
Answer:
The angle of inclination of the rider to the vertical is 32.5⁰.
Explanation:
Given;
linear speed of the motor cycle, v = 90 km/hr = 25 m/s
radius of the circle, r = 100 m
The angle of inclination of the rider to the vertical is calculated using banking angle formula;
[tex]\theta = tan^{-1}(\frac{v^2}{rg} )\\\\\theta = tan^{-1} (\frac{25^2}{100 \times 9.8} )\\\\\theta = 32.5 ^0[/tex]
Therefore, the angle of inclination of the rider to the vertical is 32.5⁰
Basic design elements include (Check 7)
What are the 3 properties of color? Immersive Reader
depth, shade, fragrance
value, hue, depth
saturation, hue, chroma
hue, value, intensity
Answer: depth, shade, fragrance
Explanation:
Which property of Special Relativity allows an electromagnet to work?
Answer:
El magnetismo es el conjunto de fenómenos físicos mediados por campos magnéticos. Estos pueden ser generados por las corrientes eléctricas o por los momentos magnéticos de las partículas constituyentes de los materiales. Es parte de un fenómeno más general: el electromagnetismo. También denomina a la rama de la física que estudia dichos fenómenos.
El níquel, hierro, cobalto y sus aleaciones se encuentran entre algunos de los materiales que presentan propiedades magnéticas que son fácilmente observables, y comúnmente se llaman imanes. Estos materiales son ferromagnéticos e interactúan fuertemente con los campos magnéticos externos a la vez que generan un campo magnético propio. Esto permite la tan conocida repulsión y atracción entre los polos de los imanes. Sin embargo, todos los materiales son influidos, de mayor o menor forma, por la presencia de un campo magnético
Answer:
b I think is the answer OK bro
The speed of light is 3 x 10^8 m/s. Find the wavelength for a typical AM radio wave with a frequency of 600 kHz. Answer in units of m.
Answer:
wavelength = (3×10^8 m/s)(6×10^5 Hz)
= 1.8×10^14 m
Determina la presión que ejercen los patinadores sobre el hielo, teniendo en cuenta que la cuchilla del patín mide 30cm de largo y su grosor es de 5mm, y que el peso de las dos personas es 120kg
Answer:
La presión que los patinadores ejercen sobre el hielo es 7,848,000 Pa
Explanation:
Los parámetros dados de los patinadores en la pala son;
La longitud de la hoja en el patín, l = 30 cm = 0.03 m
El espesor de la hoja, t = 5 mm = 0,005 m
El peso de las dos personas, m = 120 kg
Suponiendo que la sección transversal de la cuchilla sobre el hielo es rectangular, tenemos;
A = l × t
∴ A = 0,03 m × 0,005 m = 0,00015 m²
La fuerza de peso de los dos patinadores, W = m × g
Dónde;
g = La aceleración debida a la gravedad ≈ 9,81 m / s²
m = La masa de los dos patinadores = 120 kg
∴ W = 120 kg × 9,81 m / s² = 1,177,2 N
Presión, P = Fuerza, F/(Área, A)
∴ P = (1.177,2 N) / (0.00015 m²)= 7,848,000 Pascals
La presión que los patinadores ejercen sobre el hielo., P = 7,848,000 Pascals