MT⁻¹
Explanation:Given equation:
F = Kv --------------(i)
Where;
F = Magnitude of force experienced by the object
v = speed at which the object is moving
K = constant.
To get the dimension of K, follow the following steps:
i. Make K subject of the formula in equation(i)
K = F / v
ii. Get the dimension of force F and speed v
Dimension of force = MLT⁻²
Dimension of velocity = LT⁻¹
iii. Substitute these dimensions into the result of (i) above;
K = MLT⁻² / LT⁻¹
iv. Simplify the result in (iii)
First, the Ls in the numerator and denominator will cancel out
K = MT⁻² / T⁻¹
Next, the Ts will be expressed as follows
K = MT⁻² x T¹ [using the law of indices]
K = MT⁻²⁺¹
K = MT⁻¹
Therefore, the dimension of K is MT⁻¹
explain the derivation of Newton's third and second law.
Answer:
Consider an isolated system of 2 bodies A & B. An isolated system means where there is no external force acting.Now let F be the force acting on B by A & F be the force acting on A by B.Now rate of change of momentum of A =dpA/dt and rate of change of momentum of B =d pB/dt
thus FAB=d pB/dt (i)......
FBA=dpA/dt (ii)........
Adding 1 and 2 we get FAB+FBA=d pB/dt+dpA/dt =d(pB+pA)/dt
But if no force is applied momentum will also be 0 because no velocity will be there so rate of change of momentum will also be 0
thus d(pA+pB)/dt=0
therefore FAB+FBA=0
or,FAB=-FBA
(3RD LAW OF MOTION)
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]
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 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.
What is gravitational force??
Answer:
the force of attraction between all masses in the universe
Explanation:
Have a nice day :)
The lower the pH number is, the more ______ the solution.
Answer:
more acidic (less base)
hope this helps! :)
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
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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
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.
(2²)⁴pepelelellelrle
calculate the density of a pure substance if 100cm cubed of it has a mass of 20 grams
Answer:
5
Explanation:
20 x 5 = 100
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
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.
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! :)
What is the sentence that we use to
remember how to convert metric
prefixes?
Answer:
The mnemonic I can use to memorize the metric prefixes in this order is: Gigantic Monsters Killed One Million Men Napping Peacefully. All right, so again, gigantic monsters killed one million men napping peacefully.
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.
Is the path of light visible in a Suspension? Give reason.
Answer:
Answer:It is due to tyndall effect that the path of a light ray passing through a suspension is visible. The particles in suspension scatter the beam of light making it clearly visible.
Answer:
it is due to the Tyndall effect so the path of light is visible in a suspension but in solution the path of light is not visible
calcula el peso de una persona que viaja a la luna cuya masa es de 105 kg
Answer:
W = 170.62 N
Explanation:
The given question is, "calculate the weight of a person traveling to the moon whose mass is 105 kg".
We need to find the weight of a person on the Moon.
The weight of an object is given by :
W = mg
Where
g is acceleration due to gravity on Moon, g = 1.625 m/s2
W = 105 kg × 1.625 m/s²
W = 170.62 N
Hence, the weight of the person is 170.62 N.
Un automóvil se anuncia con una potencia de 600 hp y cuando se prueba en una subida pesada, alcanza una velocidad máxima de 45 km/h ¿cuál es la fuerza máxima que le imprime el motor?
Answer:
The force is 35808 N.
Explanation:
Power, P = 600 hp = 600 x 746 W = 447600 W
speed, v = 45 km/h = 12.5 m/s
Let the force is F.
P = F v
447600 = F x 12.5
F = 35808 N
Se conecta una pila de 1.5 volt a una luz led de color rojo, el led se enciende mientras esté conectado a la pila. De esta stuación se afirma que:
Answer:
Se requiere corriente para que brille la luz.
Explicación:
Una batería de 1,5 voltios está conectada a una luz LED roja, el LED se enciende siempre que esté conectado a la batería. A partir de esta situación se afirma que se requiere corriente para que brille la luz. La batería tiene corriente eléctrica almacenada que permite que la luz brille hasta que la corriente eléctrica esté presente en la batería. Esta batería se puede cargar durante un período de tiempo cuando está llena, se puede recuperar durante muchas horas.
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.
What is cerebellum ?
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.
Una persona A tiene cierta cantidad de masa y una persona B tiene la mitad de masa de la persona A ¿como es el peso de B respecto al de A?
Answer:
El peso de la persona B es la mitad del peso de la persona A.
Explanation:
El peso de la persona B puede calcularse con la siguiente ecuación:
[tex] P_{B} = m_{B}g [/tex] (1)
En donde:
[tex]m_{B}[/tex]: es la masa de la persona B
g: es la gravedad
Dado que la persona B tiene la mitad de la masa de la persona A, tenemos:
[tex] m_{B} = \frac{m_{A}}{2} [/tex] (2)
En donde:
[tex]m_{A}[/tex]: es la masa de la persona A
Al introducir la ecuación (2) en (1) nos queda:
[tex] P_{B} = \frac{m_{A}}{2}g [/tex] (3)
Sabemos que el peso de la persona A está dado por:
[tex] P_{A} = m_{A}g [/tex] (4)
Entonces, al introducir la ecuación (4) en (3) tenemos:
[tex] P_{B} = \frac{P_{A}}{2} [/tex]
Por lo tanto, el peso de la persona B es la mitad del peso de la persona A.
Espero que te sea de utilidad!
A 500 kg sports car accelerates uniformly from rest reaching a speed of 30 m/s in 6 seconds .Find the distance travelled by the car in 6 second
Answer:
the distance traveled by the sports car is 90 m
Explanation:
Given;
mass of the sports car, m = 500 kg
initial velocity of the sports car, u = 0
final velocity of the sport car, v = 30 m/s
time of motion of the car, t = 6 s
The distance traveled by the sports car is calculated as;
[tex]s = (\frac{u+v}{2} )t\\\\s = (\frac{0+30}{2} ) \times 6\\\\s = 15 \times 6\\\\s = 90 \ m[/tex]
Therefore, the distance traveled by the sports car is 90 m
What 3 factors should be considered when designing a lighting rod?
Explanation:
A lightning rod (US, AUS) If lightning hits the structure:-
It will preferentially strike the rod and be conducted to ground through a wire.
Instead of passing through the structure, where it could start a fire or cause electrocution.
The parts of a lightning protection system are air terminals (lightning rods or strike) and all of the connectors and supports to complete the system.
Por una resistencia de 10 Ω fluyen 5A. ¿Cuál será la diferencia de potencial que se le debe aplicar a la resistencia?
Answer:
V = 50 volts
Explanation:
Given that,
Resistance, R = 10 ohms
Current, I = 5 A
We need to find the potential difference across the circuit. We know that,
V = IR
Put all the values,
V = 5 × 10
V = 50 volts
Hence, the potential difference is equal to 50 volts.
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
For its size, the common flea is one of the most accomplished jumpers in the animal world. A 2.50-mm-long, 0.460 mg flea can reach a height of 15.0 cm in a single leap. a) Calculate the kinetic energy per kilogram of mass. b) If a 79.0 kg, 2.00-m-tall human could jump to the same height compared with his length as the flea jumps compared with its length, how high could the human jump
Answer:
1.47 J/kg
120 m
Explanation:
The maximum height it can jump in a single leap 15 cm, = 0.15 m
to get the kinetic energy per kg of mass, we need to find the takeoff speed. The take off speed can be calculated by using the formula
v = [tex]\sqrt{2gh}[/tex]
where h = 0.15
v = [tex]\sqrt{2 * 9.81 * 0.15}[/tex]
v = [tex]\sqrt{2.94}[/tex]
v = 1.715 m/s
energy per kg of mass =
1/2 * (1.715) = 1.47 J/Kg
TJe height a human can jump when compared to the flea is
2 m/2.5 mm * 15 cm =
2/0.0025 *0.15 =
800 * 0.15 = 120 m
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.
