Answers
Answer:
Scale
Explanation:
this is because mass of a solid is measured with a balance
Related Questions
A gas is contained in a cylinder with a frictionless moveable piston at a pressure of 2.7 * 105 pascals and a volume of 0.04 cubic meters. What is the work done by the gaseous system if the volume is increased to 0.12 cubic meters ?
Answers
The work done by the gaseous system if the volume is increased to 0.12 cubic meters is given as 21,600 joules
How to solve for the workdoneTo find the work done by the gas, we can use the formula:
W = PΔV
where W is the work done, P is the pressure of the gas, and ΔV is the change in volume.
At the initial state, the pressure is P = 2.7 × 10^5 Pa and the volume is V1 = 0.04 m^3. At the final state, the volume is V2 = 0.12 m^3.
The change in volume is ΔV = V2 - V1 = 0.12 m^3 - 0.04 m^3 = 0.08 m^3.
Substituting these values into the formula, we get:
W = PΔV = (2.7 × 10^5 Pa) × (0.08 m^3) = 21,600 J
Therefore, the work done by the gaseous system is 21,600 joules (J).
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Answer:
4.6x10^4 joules
Explanation:
A truck was carrying a substance in a tank. The molecules of that substance were moving away from each other. The truck parked overnight in a place where energy transferred out of the substance. In the morning, the substance was a gas. How were the molecules moving in the morning? Explain why the molecules were moving that way after energy was transferred out of them.
(Make it ask long as you need)
Or (short)
Answers
Answer:
In the morning the molecules were moving away from each other with a smaller speed than when the truck was carrying the substance.
Explanation:
1. Desde un piso horizontal, un proyectil es lanzado con una velocidad inicial de 10 m/s formando 30o con la horizontal. Si consideramos que la aceleración de la gravedad es 10 m/s2 . Calcular: a) El tiempo que tarda en llegar al piso. b) La máxima altura que alcanza. c) ¿A qué distancia del punto de lanzamiento choca con el piso?
Answers
Un proyectil se define como cualquier objeto que traza una trayectoria parabólica. Los parámetros importantes en el movimiento de proyectiles son; Tiempo de vuelo, rango y altura máxima.
a) 1 segundo
b) 1,25 m
c) 10 m
Deje que el tiempo de vuelo sea T
T = 2usinθ / g
u = velocidad inicial
g = aceleración debida a la gravedad
θ = ángulo
T = 2 * 10 m / s * sin (30) / 10
T = 1 segundo
Sea la altura máxima H
H = u ^ 2 sin ^ 2 θ / 2g
H = (10) ^ 2 (sin30) ^ 2/2 * 10
Alto = 1,25 m
Sea el rango R
R = u ^ 2sin 2θ / g
R = (10) ^ 2 sin 2 (30) / 10
R = 8.66 m
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a) El tiempo que tarda el proyectil en llegar al piso es:
\(t_{vuelo}=1\: s\)
b) La máxima altura alcanzada por el proyectil es:
\(y_{max}=1.25\: m\)
c) La máxima distancia alcanzada por el proyectil es:
\(x_{max}=8.66\: m\)
a)
Para calcular el tiempo que le toma al proyectil llegar al piso, se puede usar la siguiente ecuación de tiro parabólico.
\(y=y_{i}+v_{iy}t-0.5gt^{2}\) (1)
Donde:
y es la altura finaly(i) es la altura inicialv(iy) es la velocidad inicial en el eje y g es la gravedad (10 m/s²)t el tiempoRecordemos que la componente de la velocidad incial (v(i)=10 m/s) en el eje y esta dada por:
\(v_{iy}=v_{i}sin(30)\)
\(v_{iy}=10sin(30)\)
Sabemos que y(i) = 0 y ademas haciendo que y = 0, sabremos el tiempo total de vuelo. De la ecuación (1):
\(0=0+10sin(30)t-0.5(10)t^{2}\)
Despejando t.
\(10sin(30)=0.5(10)t\)
\(t=\frac{10sin(30)}{5}\)
El tiempo de vuelo sera:
\(t_{vuelo}=1\: s\)
b)
Para calcular la máxima altura, usamos la siguiente ecuación.
\(v_{fy}^{2}=v_{iy}^{2}-2gy\)
Si hacemos que veocidad final en y v(fy) sea 0, encontraremos la máxima altura.
\(0=v_{iy}^{2}-2gy_{max}\)
\(0=(v_{i}sin(30))^{2}-2gy_{max}\)
Despejamos y(max):
\(y_{max}=\frac{(v_{i}sin(30))^{2}}{2g}\)
\(y_{max}=\frac{(10sin(30))^{2}}{2(10)}\)
La máxima altura alcanzada por el proyectil será:
\(y_{max}=1.25\: m\)
c)
Sabemo que la velocidad del proyectil en la dirección x es constante, por lo tanto, la ecuacion cinemática será:
\(x=vt\)
La máxima distancia se determina con el tiempo de vuelo:
\(x_{max}=v_{ix}t_{vuelo}\)
La componente de la velocidad en la direccion x es:
\(v_{ix}=v_{i}cos(30)\)
Por lo tanto, el máximo desplazamiento será:
\(x_{max}=10cos(30)*1\)
\(x_{max}=8.66\: m\)
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.Write the meaning of following words:
a) gale
b) billows
c) raging
d) evil
Answers
Answer:
a strong wind.
showing rage.
a large undulating mass of something, typically cloud, smoke, or steam.
profoundly immoral and wicked.
Explanation:
please mark me brainliest pleasea beam of monochromatic light travels through flint glass, crown glass, lucite, and water. the speed of light beam is slowest in
Answers
Answer:
The answer is flint glass.
when the overcurrent protection for a conductor is located on the load end rather than the supply side of a conductor it is considered to be a(n) .
Answers
When the overcurrent protection for a conductor is located on the load end rather than the supply side of a conductor it is considered to be a tap conductor.
The National Electrical Code (NEC), the benchmark for safe electrical design, installation, and inspection to protect people and property from electrical hazards, defines a tap conductor as a conductor, other than a service conductor, that has overcurrent protection rated more than the ampacity of a conductor. A tap conductor has overcurrent protection ahead of its point of supply that exceeds the value permitted for similar conductors that are protected as described in NEC 240.4. Hence, when the overcurrent protection for a conductor is located on the load end rather than the supply side of a conductor it is considered to be a tap conductor.
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The suffix used to name a monatomic anion is
O A. ite
O B. ide
O C. anion
O D. ate
Answers
Which equation below is not valid for relating velocity,
time, displacement, and constant (or average)
acceleration?
Answers
Answer:(vi^2+d)^2=vf+a^2+2t
Explanation:
Given that T= [L] * [m] Y [Lt-2]Z
Find
1) Y
2)X
3)Z
Answers
Answer:
2
Explanation:
please mark me as brainlist i need it so sorry
Light normally travels in straight lines. What term is used to describe the bending of light when it crosses from one medium to another?
Answers
The term refraction is used to describe the bending of light when it crosses from one medium to another. The bending of light happens due to the different densities of the two substances.
3) Two particles are travelling along a straight line AB of length 20m.
At the same instant one particle starts from rest at A and travels
towards B with a constant acceleration of 2 ms72 and the other
particle starts from rest at B and travels towards A with a constant
acceleration of 5 ms2, find how far from A the particles collide.
Answers
At distance of 40/7 m from A the particles will collide.
Let particles collide at C
And let distance AC = x and BC = y
then, x+y = 20
As the equation used for distance required here is: s= ut +1/2 a\(t^{2}\) and here u=0
Then, 1/2 (2)\(t^{2}\) +1/2 (5)\(t^{2}\) =20
7/2\(t^{2}\) =20
\(t^{2}\) = 40/7
Now
x= 1/2 (2)\(t^{2}\) = 40/7 m
Therefore, at distance of 40/7 m from A the particles will collide.
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what can you say about the speed of a ball that travelled a distance of 20 m and displacement of 10 m in 5 seconds
Answers
The speed of the ball at the given distance and time of motion is 4 m/s.
What is speed?The speed of an object is the rate of change of distance traveled by the object with time.
Speed is a scalar quantity because it has only magnitude and no direction. It is measured in meters per second.
Speed of the ballFor a ball that travelled a distance of 20 m and displacement of 10 m in 5 seconds, the speed of the ball at the given distance and time of motion is calculated as follows;
Speed of the ball = distance traveled by the ball / time of motion
from the question, distance = 20 mtime of motion, t = 5 secondsspeed of the ball = 20 m / 5 s
speed of the ball = 4 m/s
Thus, the speed of the ball at the given distance and time of motion is 4 m/s.
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The force experienced by an electron in a field between parallel plates is proportional to which of the following? Select all that apply.
the potential difference between the plates
the current in the circuit
the inverse of the potential between the plates
the distance between the plates
the inverse of the distance between the plates
Answers
Answer:
2 and 5
Explanation:
it's correct i think
Need help with this assignment please
Answers
Torque is a measure of the turning force applied to an object about a rotational axis. It is calculated as the product of the force applied to the object and the distance from the axis of rotation at which the force is applied.
How to explain the informationUse the equation slope = mod to calculate the unknown mass (mo) for parcels A and C, setting d = 1.0 m, and parcels G and H, setting d = 1.5 m.
Record all data, tables, and four graphs for analysis.
The experiment demonstrates the application of torque in determining unknown masses and provides valuable insights into the concept of torque in physics.
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Each value measured in nature has a number value, called its magnitude, and
a dimension, or
Answer here
Answers
Answer:
yassssssssssssssssssssssssssssssssssssss
Explanation:
onsider what happens when you jump up in the air. Which of the following is the most accurate statement?A) Since the ground is stationary, it cannot exert the upward force necessary to propel you into the air.Instead, the internal forces of your muscles acting on your body itself propels the body into the air.B) The upward force exerted by the ground pushes you up, but this force can never exceed your weight.C) When you jump up the earth exerts a force F1on you and you exert a force F2 on the earth. You go upbecause F1 > F2, and this is so because F1 is to F2 as the earth's mass is to your mass.D) You are able to spring up because the earth exerts a force upward on you which is stronger than thedownward force you exert on the earth.E) When you push down on the earth with a force greater than your weight, the earth will push back with thesame magnitude force and thus propel you into the air.
Answers
Answer: D
Explanation: it seem right to me I really don't know if this right but I hope this helps
unpolarized light of intensity Io is incident on an ideal linear polariser (no absorption) . what is the transmitted intensity?
Answers
Answer:
A Polarizing sheet transmits only the component of light polarized along a particular direction and absorbs the component perpendicular to that direction.
Consider a light beam in the z direction incident on a Polaroid which has its transmission axis in the y direction. On the average, half of the incident light has its polarization axis in the y direction and half in the x direction. Thus half the intensity is transmitted,and the transmitted light is linearly polarized in the y direction.
What is the maximum wavelength of light needed to eject electrons from a metal whose work function is 4.48 eV? What is the frequency of the light?
Answers
Given,
The work function of the metal, W=4.48 eV
The work function is given by the formula,
\(W=h\upsilon_0\)Where ν₀ is the threshold frequency of the metal.
But the frequency is related to wavelength as,
\(\upsilon=\frac{c}{\lambda}\)Where c is the speed of light and λ is the wavelength.
Thus the work function will be,
\(W=\frac{hc}{\lambda_0}\)Where λ₀ is the maximum wavelength needed to eject the electron from the given metal.
On substituting the known values in the above equation,
\(\begin{gathered} 4.48\times1.6\times10^{-19}\text{ J}=\frac{6.63\times10^{-34}\text{ Js}\times3\times10^8\text{ m/s}}{\lambda_0} \\ \Rightarrow\lambda_0=\frac{6.63\times10^{-34}\text{ Js}\times3\times10^8\text{ m/s}}{_{}4.48\times1.6\times10^{-19}\text{ J}} \\ =277.48\times10^{-9}\text{ m} \end{gathered}\)Thus the maximum wavelength of the light required is 277.48 nm.
The frequency of the light is,
\(\begin{gathered} \upsilon_0=\frac{c}{\lambda_0} \\ =\frac{3\times10^8}{277.48\times10^{-9}} \\ =1.08\times10^{15}\text{ Hz} \end{gathered}\)Thus the frequency of the required light is 1.08×10¹⁵ Hz.
Does the thermal conductivity of a substance affect its ability to heat or be heated by its surroundings? why or why not?
Answers
Answer:
Yes, because the higher the thermal conductivity value of a particular material the rapidly it will get heated by the surrounding.
A closed piston-cylinder system contains air (molecular weight M = 28.97 kg/kmol) at a temperature of 27'C and an absolute pressure of 100 kPa.
(a) Determine the specific volume of air, in m'/kg. Air in the cylinder is heated without changing its temperature until its volume doubles.
(b) Does the specific volume of air in the cylinder decrease, increase, or remain the same? Justify with quation(s).
c) Does the pressure of air in the cylinder decrease, increase, or remain the same? Justify with equation(s).
Answers
(a) The specific volume of air in the cylinder is heated without changing its temperature until its volume doubles is 0.861 m³/kg.
(b) Specific volume of air in the cylinder increases.
(c) The pressure of air in the cylinder decrease.
What is Specific volume?The amount of cubic metres that one kilogramme of matter takes up is known as the specific volume. It is the reciprocal of density and the ratio of a substance's volume to mass. In other words, specific volume is inversely related to density. Any state of matter may be measured or calculated for specific volume, but calculations involving gases are where it is most frequently applied.
Though it can also be expressed in terms of millilitres per gramme (mL/g) or cubic feet per pound (ft³/lb), the standard unit for specific volume is cubic metres per kilogramme (m³/kg).
(a) Specific volume =
\($ \mathrm{ \hat V = \frac{V}{m} = \frac{RT}{P} }\)
\($ \mathrm{ =\frac{\overline RT}{mP} }\)
\($ \mathrm{ = \frac{8.314 \times 300}{28.97 \times 100} }\)
\($ \mathrm{ \hat V = 0.861 \ m^3/kg }\)
(b) Mass will remain constant so on doubling the volume, specific volume will also be doubled i.e.
\($ \mathrm{ \hat V_2 = 2\hat V_1 }\)
Thus, specific volume increases.
(c) Since, T = constant
\($ \mathrm{ P\hat V_1 = P\hat V_2}\)
\($ \mathrm{ \frac{P_2}{P_1} = \frac{\hat V_1 }{\hat V_2 } }\)
\($ \mathrm{ \frac{P_2}{P_1} = \frac{\hat V_1 }{2\hat V_1 } }\)
\($ \mathrm{ \frac{P_2}{P_1} = \frac{1 }{2 } }\)
\($ \mathrm{ P_2= \frac{1}{2} \times 100}\)
\($ \mathrm{ P_2=50}\)
Thus pressure decrease in this case.
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Complete question:
Explain the light detection technique of photovoltaic detection
Answers
Answer:
Photovoltaic detection is a technique that converts light into electrical energy. It is a process that involves the use of a photovoltaic cell, which is made up of semiconductor materials, to generate an electric current when exposed to light.
The photovoltaic cell absorbs the photons of light, which then knock electrons out of their orbits, creating a flow of electricity. The amount of electricity produced is proportional to the intensity of the light. The photovoltaic cell is commonly used in solar panels to generate electricity from sunlight. The efficiency of the photovoltaic cell is dependent on several factors, including the type of semiconductor material used, the purity of the material, and the thickness of the cell.
The photovoltaic cell has many applications, including in solar power generation, telecommunications, and remote sensing. The technique of photovoltaic detection is an important area of research, as it has the potential to provide a clean and renewable source of energy that can help mitigate climate change.
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A force of 6.7 N acts on a 30 kg body initially at rest. Compute the work done by the force in (a) the first, (b) the second, and (c) the third seconds and (d) the instantaneous power due to the force at the end of the third second.
Answers
Answer:
(a) 0.748 J
(b) 2.245 J
(c) 3.74 J
(d) 4.482 W
Explanation:
(a) Work done W = Force × distance
W = F×d,
Where d = 1/2(at²)
Therefore,
W =1/2(F×at²)................ Equation 1
Where a = acceleration, t = time.
But,
a = F/m...................... Equation 2
Where m = mass.
Substitute equation 1 into equation 2
W = 1/2(F²t²/m)................. Equation 3
Given: F = 6.7 N, t = 1 s, m = 30 kg
Substitute into equation 3
W₁ = 1/2(6.7²×1²/30)
W = 0.748 J.
(b) Similarly,
The work done in the second seconds is
Where t₂ = 2 s
W₂ = 1/2(F²t₂²/m)- W₁
W = 1/2(6.7²×2²/30)-0.748
W = 2.245 J
(c) The work done in the third seconds is
Where t₃ = 3 s
W₃ = 1/2(F²t₃²/m)-(W₂+W₃)
W = 1/2(6.7²×3²/30)-(2.993)
W = 3.74 J.
(d) P = Fv ............... Equation 4
Where v = velocity.
and,
v = at..................... Equation 5
Substitute equation 5 into equation 4
P = Fat................... Equation 6
Given: F = 6.7 N, a = 6.7/30 = 0.223 m/s², t = 3 s
Substitute into equation 6
P = 6.7×0.223×3
P = 4.482 W.
state ohmic conductor
Answers
Answer:
An ohmic conductor is defined as one which obeys ohm's law that is V ∝ I where is the voltage and is the current. There must be a linear graph. Silver is an example of an ohmic conductor as the graph for silver is a linear graph. Silver and copper are some examples of ohmic conductor
Select the correct answer.
A boat moves 60 kilometers east from point A to point B. There, it reverses direction and travels another 45 kilometers toward point A. What are the total
distance and total displacement of the boat?
O A.
OB.
O C.
O D.
The total distance is 105 kilometers and the total displacement is 45 kilometers east.
The total distance is 60 kilometers and the total displacement is 60 kilometers east.
The total distance is 105 kilometers and the total displacement is 15 kilometers east.
The total distance is 60 kilometers and the total displacement is 45 kilometers east.
Answers
The total distance is 105 kilometers and the total displacement is 15 kilometers east. Option C
How to solve for the total distanceTo calculate the total distance, we add the distances traveled in each leg of the journey: 60 kilometers (from A to B) + 45 kilometers (from B back to A) = 105 kilometers.
However, displacement refers to the change in position of an object in a straight line from its starting point to its ending point. In this case, since the boat starts and ends at the same point (A), the total displacement is zero.
Hence The total distance is 105 kilometers and the total displacement is 15 kilometers east.
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What type of energy is associated with spring constants?A.GPE onlyB.KE onlyC.EPE onlyD.KE and EPE
Answers
Spring constant has unit N/m, or force per length.
The spring constant gives information about how much energy a spring can store when stretched or compressed per stretch length.
This means that the spring constant has information about both EPE and KE.
Since energy is conserved, EPE when spring is stretched = KE when spring is released.
Answer D is correct.
15. a) The diagram below shows to answer the question that follow show State and explain the effect on the height, h, when the thistle funnel is of the liquids (2 marks) ved upwards towards the surface
Answers
When the thistle funnel is moved upwards towards the surface of the liquids, the height (h) decrease.
What happens when the thistle funnel is moved upward?
An important principle outlined by Pascal's law states that any fluid (in this instance, liquids) experiences equal transmission of force in every direction within it. Hence, there is an intimate relationship between the height of a liquid column and its pressure.
Raising a thistle funnel reduces this height causing loss of weight from above this point thus decreasing its pressure.
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A bike accelerates from 0 m/s to 15 m/s over the span of 5 seconds. How fast is the bike
traveling after 2.5 seconds?
Answers
The bike is travelling at 22.5 m/s after 2.5 s
What is acceleration?This is defined as the rate of change of velocity which time. It is expressed as
a = (v – u) / t
Where
a is the acceleration v is the final velocity u is the initial velocity t is the time How to determine the acceleration Initial velocity (u) = 0 m/sFinal velocity (v) = 15 m/sTime (t) = 5 sAcceleration (a) =?a = (v – u) / t
a = (15 – 0) / 5
a = 3 m/s²
How to determine the final velocity in the first 2.5 s Initial velocity (u) = 15 m/sAcceleration (a) = 3 m/s²Time (t) = 2.5 s Final velocity (v) = ?a = (v – u) / t
3 = (v – 15) / 2.5
Cross multiply
v – 15 = 3 × 2.5
v – 15 = 7.5
Collect like terms
v = 7.5 + 15
v = 22.5 m/s
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An 80 kg astronaut has gone outside his space capsule to do some repair work. Unfortunately, he forgot to lock his safety tether in place, and he has drifted 5.0 m away from the capsule. Fortunately, he has a 1000 W portable laser with fresh batteries that will operate it for 1.0 h. His only chance is to accelerate himself toward the space capsule by firing the laser in the opposite direction. He has a 10-h supply of oxygen. His only chance is to accelerate himself toward the space capsule by firing the laser in the opposite direction. He has a 10-h supply of oxygen.
Required:
How long will it take him to reach safety?
Answers
Answer:
t = 3.924 s
Explanation:
First, we will calculate the amount of work required to get the astronaut back to the capsule:
\(W = Fd\\\)
where,
W = work required = ?
F = Force = Weight = mg = (80 kg)(9.81\ m/s²) = 784.8 N
d = distance = 5 m
Therefore,
\(W = (784.8\ N)(5\ m)\\W = 3924 J\)
Now the time can be calculated as:
\(Power = \frac{W}{t}\\t = \frac{W}{Power}\\\\t = \frac{3924\ J}{1000\ W}\\\\\)
t = 3.924 s
have you ever had to estimate something for which there wasn't an exact answer? what was it? what tools did you use to make your estimation? discuss
Answers
Yes, estimation of a population of plant species in a precondition area. The tool use to make estimation was a QUADRAT.
What is estimation ?Finding an estimate or approximation a number that may be used for a purpose despite the possibility of incomplete, ambiguous, or unstable input data is the process of estimation.
It is simple to count plants in a small area, and the distribution of those plants is noted on a map or scale diagram for the region.
A technique known as the quadrat sampling approach may be used to Assess the number of plants.
Thus, a QUADRAT, a square or rectangular frame (tool) composed of thick wire, is repeatedly tossed at random.
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What was the most difficult thing about organizing your store
Answers
Answer:
organizing
Explanation:
thinking about where things should go, to make it so that everybody has an easy experience when inside of my store.