Answer:
Einsteins theory about time says:
Time slows down or speeds up depending on how fast you move relative to something else (So when I'm having fun time move fast, and when I'm doing my homework, time moves slow :( )
Explanation:
Have a great summer :)
If two opposing forces are equal, then the net force is 0 N.
true or false?
Answer:
false
Explanation:
UN ELEVADOR DE TALLER TIENE PISTONES DE ENTRADA Y DE SALIDA , CON DIAMETRO DE 15 cm Y 40 cm RESPECTIVAMENTE, SE USA EL ELEVADOR PARA MANTENER LEVANTADO UN CARRO QUE PESA 1.4 X104 NEWTON . ENCUENTRE: A) ¿QUE FUERZA SE APLICA AL PISTON DE ENTRADA? B) QUE PRESION SE APLICA AL PISTON DE ENTRADA? *
Answer:
a) La fuerza que se aplica al pistón de entrada tiene una magnitud de 1968.75 newtons.
b) La presión que se aplica al pistón de entrada es de 111408.460 pascales.
Explanation:
a) Este problema se resuelve mediante el Principio de Pascal, el cual establece que la presión dentro de un sistema hidráulico cerrado es la misma en cualquiera de sus puntos. Por tanto, podemos calcular la fuerza aplicada al pistón de entrada mediante la siguiente relación:
[tex]\frac{F_{in}}{\frac{\pi}{4}\cdot D_{in}^{2}} = \frac{M\cdot g}{\frac{\pi}{4}\cdot D_{out}^{2} }[/tex]
[tex]F_{in} = \left(\frac{D_{in}}{D_{out}} \right)^{2}\cdot M\cdot g[/tex] (1)
Where:
[tex]F_{in}[/tex] - Fuerza aplicada al pistón de entrada, en newtons.
[tex]D_{in}[/tex] - Diámetro del pistón de entrada, en metros.
[tex]D_{out}[/tex] - Diámetro del pistón de salida, en metros.
[tex]M\cdot g[/tex] - Peso del carro, en newtons.
Si sabemos que [tex]D_{in} = 0.15\,m[/tex], [tex]D_{out} = 0.40\,m[/tex] y [tex]M\cdot g = 1.4\times 10^{4}\,N[/tex], entonces la fuerza aplicada al pistón de entrada es:
[tex]F_{in} = \left(\frac{0.15\,m}{0.40\,m} \right)^{2}\cdot (1.4\times 10^{4}\,N)[/tex]
[tex]F_{in} = 1968.75\,N[/tex]
La fuerza que se aplica al pistón de entrada tiene una magnitud de 1968.75 newtons.
b) Ahora, presión aplicada al pistón de entrada ([tex]p[/tex]), en pascales, queda descrita a través de la siguiente expresión:
[tex]p = \frac{F_{in}}{\frac{\pi}{4}\cdot D_{in}^{2} }[/tex] (2)
Si sabemos que [tex]F_{in} = 1968.75\,N[/tex] y [tex]D_{in} = 0.15\,m[/tex], entonces la presión aplicada al pistón de entrada es:
[tex]p = \frac{1968.75\,N}{\frac{\pi}{4}\cdot (0.15\,m)^{2} }[/tex]
[tex]p = 111408.460\,Pa[/tex]
La presión que se aplica al pistón de entrada es de 111408.460 pascales.
explain the working principle of the moving coil coil galvanometer
Answer:
When a current-carrying coil is suspended in a uniform magnetic field it is acted upon by a torque. Under the action of this torque, the coil rotates and the deflection in the coil in a moving coil galvanometer is directly proportional to the current flowing through the coil.
Why is an organism that reproduces asexually genetically identical to its parent?
A.All of the offspring’s genes mutated to look like the parent’s genes.
B.The offspring inherited only half of the parent’s genes.
C.All of the offspring’s genes came from the parent.
D.The offspring inherited only the parent’s dominant genetic engineering
Brian has an object suspended in the air. It has a mass of 100 kg and is 25 meters above the ground. What is the object’s potential energy?
Explanation:
the PE = Weight x g x Height above ground where g is the gravitational constant (9.8m/s^2)
so tge PE = 100 x 9.8 x 25 = 24500 J
True or False: Sound waves are the longest wave lengths on the electromagnetic spectrum.
Answer:
False: Wave lengths on the electromagnetic spectrum are "electromagnetic",
They are transverse waves,
Sound waves are "longitudinal" waves and depend on the motion of the medium of transmission for propagation.
can i have the physical science grade 12 june 2021 paper (common paper)
Answer:
u have to purchase it via online e-commerce platforms
Answer:
what your crazy anong pong common paper
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Answer:
Cannot see all the answer choices but, when pressure goes up, volume goes down. So your best bet is to choose the graph that has a downward slant.
Explanation:
desde lo alto de una antena de telefono se lanza una peloota de tenis, la antena mide 150 metros. se mide el alcance horizontal y cae a unos 70 metros de su base. Calcular: a)La velocidad horizontal inicial con a que fue lanzada la pelota. b) La velocidad vertical con la cual llega la pelota al piso
Explanation:
las respuestas están en la foto de arriba
when a wooden block floats in water displaces 0.006 cubic of the water find the weight of the wooden block when it is in air
Answer:
solve it with the formula 1−0.4=0.6, 0.6Vρg=Vρbg where ρb
Explanation:
The buoyant force acting on an immersed body is equal to the weight of the fluid displaced by it, if the fluid is in rest. In this case, the fluid is accelerating upwards so the buoyant force must also provide the displaced fluid force to accelerate. Therefore, buoyant force will be fVρgeff where V = volume of body and f = fraction of volume of body immersed in fluid and geff=g+a=1.5g.
The buoyant force acting on an immersed body is equal to the weight of the fluid displaced by it, if the fluid is in rest. In this case, the fluid is accelerating upwards so the buoyant force must also provide the displaced fluid force to accelerate. Therefore, buoyant force will be fVρgeff where V = volume of body and f = fraction of volume of body immersed in fluid and geff=g+a=1.5g.When fluid is at rest: f=
The buoyant force acting on an immersed body is equal to the weight of the fluid displaced by it, if the fluid is in rest. In this case, the fluid is accelerating upwards so the buoyant force must also provide the displaced fluid force to accelerate. Therefore, buoyant force will be fVρgeff where V = volume of body and f = fraction of volume of body immersed in fluid and geff=g+a=1.5g.When fluid is at rest: f=⇒ρb=0.6ρ.
The buoyant force acting on an immersed body is equal to the weight of the fluid displaced by it, if the fluid is in rest. In this case, the fluid is accelerating upwards so the buoyant force must also provide the displaced fluid force to accelerate. Therefore, buoyant force will be fVρgeff where V = volume of body and f = fraction of volume of body immersed in fluid and geff=g+a=1.5g.When fluid is at rest: f=⇒ρb=0.6ρ.In the second case: 1.5fVρg=Vρbg+Vρba=1.5Vρbg⇒fρ=ρb⇒f=0.6.
The buoyant force acting on an immersed body is equal to the weight of the fluid displaced by it, if the fluid is in rest. In this case, the fluid is accelerating upwards so the buoyant force must also provide the displaced fluid force to accelerate. Therefore, buoyant force will be fVρgeff where V = volume of body and f = fraction of volume of body immersed in fluid and geff=g+a=1.5g.When fluid is at rest: f=⇒ρb=0.6ρ.In the second case: 1.5fVρg=Vρbg+Vρba=1.5Vρbg⇒fρ=ρb⇒f=0.6.Thus, the fraction of immersed volume remains the same.
The buoyant force acting on an immersed body is equal to the weight of the fluid displaced by it, if the fluid is in rest. In this case, the fluid is accelerating upwards so the buoyant force must also provide the displaced fluid force to accelerate. Therefore, buoyant force will be fVρgeff where V = volume of body and f = fraction of volume of body immersed in fluid and geff=g+a=1.5g.When fluid is at rest: f=⇒ρb=0.6ρ.In the second case: 1.5fVρg=Vρbg+Vρba=1.5Vρbg⇒fρ=ρb⇒f=0.6.Thus, the fraction of immersed volume remains the same.Body will float with 40% of the volume above water surface.
Con respecto a las magnitudes longitud del péndulo y periodo, ¿por qué la línea de mejor ajuste de los puntos-dato de la distribución indica que sí hay relación entre ambas magnitudes?
Answer:
Por que existe una relación entre dichas magnitudes.
Para un pendulo perfecto de largo L, sabemos que el periodo esta definido como:
[tex]T = 2*\pi *\sqrt{L/g}[/tex]
Donde:
pi = 3.14
L = largo del péndulo
g = aceleración gravitatoria = 9.8 m/s^2
Entonces podemos ver que el periodo es proporcional a la raíz cuadrada de la longitud del péndulo.
Esto es por lo que al analizar datos de un experimento se debería observar una relación entre esas magnitudes.
Resistance is equal to the potential difference divided by what? Give the name, not the unit of
measurement
We have that Resistance is equal to the potential difference divided by
Current
The Name of the Quantity is Current
From the question we are told
Resistance is equal to the potential difference divided by what? Give the name, not the unit of measurement
Generally the equation for Resistance is mathematically given as
[tex]R=\frac{V}{I}[/tex]
Where
I=Current
V=Voltage
R=Resistance
Therefore
Resistance is equal to the potential difference divided by
Current
The Name of the Quantity is Current
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what should you do to change a value in SI units in U.S customary units
Answer:
To convert values expressed in SI unit to the other unit divide the SI unit by the value in the Multiply By column.
Explanation:
A puppy finds a rawhide bone and begins to pull it with a force, Ft. The free-body diagram is shown.
Which describes what happens to the bone?
Answer:
it begins to move to the right! :)
calculate the density of a solid of mass 20kg if it occupies a volume of 4m³
Answer:
Density=Mass/Volume
=20/4 kg/m^3
=5 kg/m^3
when we put our finger in front a a lit flashlight, light appears to pass through our finger when seen on a wall,how?
Answer:
diffraction phenomenon
Explanation:
When you place your finger in front of a flash, you have a diffraction phenomenon whereby the light fills a part of the space with the first maximum diffraction.
In this case the phenomenon of geometric optics cannot explain the process of bending the beam around an object.
Suggest two ways in which the boy could balance the beam?
Answer:
Hope this is what you were looking for!
Explanation:
1) So, if we are talking about balancing a straight stick (beam), he could put a finger from each hand on either side of it and move them together. As a result of friction his fingers will meet at the balance point.
2) Method of trial and error.
How is the mirror angle related to the angles of incidence and reflection?
Answer:
mirror angle is related to sngle of incident n reflection becuse they are ewaul to each other
17. What is the gain in gravitational potential energy of a body of weight 2000 N as it rises from a height of 20 m to a height of 25 m above the earth's surface?
(A) 400 J
(B) 1 000 J
(C) 10 000 J
(D) 20 000 J
Answer:
C) 10000 J
Explanation:
∆p.e =mg∆h
= 2000 × 5
= 10000J
Which statements describe acceleration? Check all that apply. Negative acceleration occurs when an object slows down in the positive direction. Negative acceleration occurs when an object slows down in the negative direction. Negative acceleration occurs when an object speeds up in the negative direction. Positive acceleration occurs when an object speeds up in the positive direction. Positive acceleration occurs when an object speeds up in the negative direction. Positive acceleration occurs when an object slows down in the negative direction
Answer:
Negative acceleration occurs when the acceleration vector points to the left.
1. Object slowing down in the positive direction.
2. Object speeding up in the negative direction.
Following six statements:
1. T
2. F
3. T
4. T
5. F
6. T
Check direction of acceleration vector.
a student places 8 similar coins in a pile . the height of the pile of coins is 2.4 cm calculate the average thickness of one coin
Answer:
0.3 cm
Explanation:
[tex] \frac{2.4}{8} \\ = 0.3[/tex]
PLEASE HELP ME!
1. Figure 5.20 shows a graph of displacement against time for a wave.
(a) What is meant by amplitude?
(b) Determine the period of oscillation, T. Then, calculate the frequency of oscillation.
2. Compare and contrast progressive wave and stationary wave.
Answer:
a) A = 3 cm, b) T = 0.4 s, f = 2.5 Hz,
2) A standing wave the displacement of the wave is canceled and only one oscillation remains
Explanation:
a) in an oscillatory movement the amplitude is the highest value of the signal in this case
A = 3 cm
b) the period of oscillation is the time it takes for the wave to repeat itself in this case
T = 0.4 s
the period is the inverse of the frequency
f = 1 /T
f = 1 /, 0.4
f = 2.5 Hz
2) a traveling wave is a wave for which as time increases the displacement increases, in the case of a transverse wave the oscillation is perpendicular to the displacement and in the case of a longitudinal wave the oscillation is in the same direction of the displacement.
A standing wave occurs when a traveling wave bounces off some object and there are two waves, one that travels in one direction and the other that travels in the opposite direction. In this case, the displacement of the wave is canceled and only one oscillation remains.
Balance the equation-
Al+Mn02 ———-> Mn + Al2O3
Answer:
4Al + 3Mno2 --> 2Al2o3 + 3Mn
Explanation:
Al = 1 x 4 = 4
Mn = 1 x 3 = 3
O = 2 x 3 = 6
----------
Al = 2 x 2 = 4
Mn = 1 x 3 = 3
O = 2 x 3 = 6
50 points question (Who is known as father of science)Albert Einstein
Answer:
Albert Einstein is known as the father of science.
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Explain the working of thermos flask in simple and easy words
Answer:
a thermos is designed to keep hot things hot by not allowing heat to escape.
Explanation:
A thermos is a bottle with a double-walled container inside of it. The air between the two walls is sucked out during construction, creating a vacuum.
If he jumps from the plane with a velocity of +2 ft/s and, after 7 seconds of free fall, he has a velocity of -223ft/s, what is his displacement?
Answer:
his displacement is 772.85 ft
Explanation:
Given;
initial velocity of his jump, u = 2 ft/s
final velocity of his jump, v = - 223 ft/s
time of motion, t = 7 seconds
acceleration due to gravity, g = 32.17 ft/s²
Let downward motion = positive direction
Let his displacement after 7s = Δh
Apply the following kinematic equation to determine his displacement.
[tex]v^2 = u^2 + 2g\Delta h\\\\(-223)^2 = (2)^2 + (2\times 32.17)\Delta h\\\\49,729 = 4 + 64.34\Delta h\\\\-64.34 \Delta h = 4 - 49,729\\\\-64.34 \Delta h = -49,725\\\\\Delta h = \frac{49,725}{64.34} \\\\\Delta h = 772.85 \ ft[/tex]
Therefore, his displacement is 772.85 ft
3. How does the centripetal force change when
the rubber stopper makes a circular motion
with a smaller radius?
Answer:
The centripetal force increases.
Explanation:
Centripetal force is given by [tex]F_c=ma_c[/tex]; where [tex]a_c=\frac{v^2}{r}[/tex].
Given these two equations, we can rewrite the formula for centripetal force as:
[tex]F_c=m\frac{v^2}{r}[/tex]
As shown, radius is in the denominator, thus, a smaller radius would lead to a larger centripetal force.
The lower the pH number is, the more ______ the solution.
Answer:
more acidic (less base)
hope this helps! :)
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Answer:
Stimulants are a group of drugs that result in increased activity in the body. Sometimes referred to as “uppers,” these drugs are frequently abused due to their performance-enhancing and euphoric effects. Generally, those who abuse stimulants experience heightened energy levels and enhanced focus.
Stimulants speed up mental and physical processes, which can produce desirable effects in the short-term by increasing levels of dopamine in the brain. While users may feel great due to the short-term effects of stimulants, long-term abuse of these drugs can have significant consequences, which is why it is so important for those who abuse the drugs to get help as quickly as possible.
Explanation:
hope this works
