Answer:
The tension experienced in the string at the highest point is approximately 9.019 Newtons
Explanation:
The mass of the body tied to the string, m = 0.1 kg
The path of motion of the mass = Vertical circular motion
The speed of rotation of the stone, v = 10 m/s
The radius of the circular motion path, r = 1 m
The required information = The tension at the highest point, T
At the highest point, the tension, 'T', comprises of the centrifugal force, 'F', acting upwards in the string and the weight, 'W' of the body acting downwards
∴ T = F - W
[tex]The \ centrifugal \ force, \ F = \dfrac{m \times v^2}{r}[/tex]
Weight, W = m × g
Where;
g = The acceleration due to gravity ≈ 9.81 m/s²
Therefore;
The centrifugal force, F = 0.1 kg × (10 m/s)²/(1 m) = 10 N
The weight of the mass tied to the string, W ≈ 0.1 kg × 9.81 m/s² = 0.981 N
From which we have;
T = 10 N - 0.981 N = 9.019 N
The tension experienced in the string at the highest point ≈ 9.019 Newtons
The image shows a model of the gravitational field around Earth.
Which best describes the model?
Answer:
B not to sure tho sorry
Explanation:
sorry
Answer:it is b.
Explanation:only answer that makes sense :)
A book with a mass of 2 kg sits on top of a book shelf at a height of 3 m. How much potential energy does the book have
Answer:
Answer is 98 joules
Explanation:
P. E=2*9.8*3=98
S.i unit of potential energy ⚡ is joules
So answer is 98 joules
Which nucleus completes the following equation?
A. 299 Np
B. 20Pa
C. 2 Pa
D. - Np
Answer:
Option D. ²³⁹₉₃Np
Explanation:
Let the unknown be ʸₓA.
Thus, the equation becomes:
²³⁹₉₂U —> ⁰₋₁e + ʸₓA
Next, we shall determine the x, y and A. This can be obtained as follow:
92 = –1 + x
Collect like terms
92 + 1 = x
93 = x
x = 93
239 = 0 + y
239 = y
y = 239
ʸₓA => ²³⁹₉₃A => ²³⁹₉₃Np
Thus, the complete equation is:
²³⁹₉₂U —> ⁰₋₁e + ²³⁹₉₃Np
Un cuerpo permanecerá en movimiento rectilíneo uniforme o en reposo si la fuerza neta sobre él es nula o si sobre este no actúa ninguna fuerza". ¿A qué concepto corresponde la definición? *
Answer:
Primera Ley de Newton, también llamado Ley de la Inercia de Newton.
Explanation:
Este concepto es la Primera Ley de Newton o Ley de la Inercia de Newton, la cual dice textualmente que todo cuerpo al cual no se aplica ninguna fuerza externa neta no nula sobre sí se encuentra en reposo o desplazándose a velocidad constante.
Entiéndase a la inercia como la tendencia de un cuerpo a oponerse al cambio en su estado de movimiento.
Which of the following physical quantity is having same SI units?
a) Speed and average speed
b) Speed and velocity
c) Speed and average velocity
d) All the above
Answer:
d) All the above
Explanation:
Speed SI unit is metre per second.Velocity SI unit is metre per second.Average speed SI unit is metre per second.Average velocity SI unit is metre per second.Therefore, as all of the physical quantities have the same SI units, the answer is d) all of the above.
Answer this question fast please
What is the main energy source that causes changes in the atmosphere of Earth?
A. fossil fuels
B. the moon
C. the sun
D. greenhouse gases
Answer:
C is the correct answer.
A 2kg ball is attached to a 0.80m string and whirled in a horizontal circle at a constant speed of 6m/s .the work done on the ball during each revolution is.
Answer:
work done = kinetic energy in a SHM
= 1/2mW²r²
but ; w = v/r
therefore ; w:d = 1/2mv²/r² × r²
= 1/2 mv²
= 1/2 × 2×6²
= 36J
(v) A car
A car is pulled with a force of 60.N at angle of 30 ron, the
horizontal. Find the vertical and horizontal components of the applied
force.
Answer:
Explanation:
The vertical component is found in the magnitude of the force times the sine of the angle; the horizontal component is found in the magnitude of the force times the cosine of the angle. Thus:
vertical component = [tex]60.0sin(30.0)=30.0[/tex] and
horizontal component = [tex]60.0cos(30.0)=52.0[/tex]
I WILL MARK BRAINLLIEST IF U ANSWER
PLS FASTTTT
Answer:
1) vitamins
2) Meat, eggs, liver
Explanation:
1) Low levels (deficiency) in vitamins such a vitamin B12 and vitamin D can lead to tiredness.
Vitamin B12 is one of the most important nutrients for energy because it helps the blood, digestive system, brain and nervous system. Vitamin D is necessary for bone health and good immune function.
2) To prevent deficiency in vitamins, foods such as beef, eggs, liver, fish can be eaten. Also, supplements such as B-complex vitamin can be taken.
physics
please help
its physic based on the law of movement
Explanation:
4) The net torque on the on the meter stick is equal to zero in order to have no rotation.
[tex]\tau_{1} = \tau_{2}[/tex]
[tex]F_{1}d_{1} = F_{2}d_{2}[/tex]
[tex](8 \:N)(0.3\: m) = F_{2}(0.1 \:m)[/tex]
[tex]F_{2} = \frac{(8 \:N)(0.3 \:m)}{(0.1 \:m)} = 24 \:N[/tex]
5) We are going the same equations in #4 here.
[tex]F_{1}d_{1} = F_{2}d_{2}[/tex]
[tex](500 \:N)(2.4 \:m) = F_{2}(3.0 \:m)[/tex]
[tex]F_{2} = \frac{(500 \:N)(2.4 \:m)}{(3.0 \:m)} = 400 \:N[/tex]
The number of molecules in 48.0 grams of oxygen gas o2 is
Answer:
9.03 times 10times 23 calculate it and there ya go
Answer:
Ok.
Know this.
1 moles of a gas contains 6.022x10²³molecules.
Given: 48g of Oxygen gas.
Find the moles present
Mole = Mass/Molar Mass
Molar Mass of O2 = 16x2 =32g/mol
Mole = 48/32
=1.5moles of O2.
Recall
1 moles of gas contains 6.022x10²³molecules
1.5moles would contain
1.5 x 6.022x10²³molecules
=9.033 x 10²³ molecules of Oxygen gas.
Have a great day!
An object moves 100m distance in 5 second.find its speed?
[tex]speed = \frac{distance}{time} \\ = 100 \div 5 \\ = 20m \: per \: second[/tex]
Final Answer: 20m/sThe object moves at the speed of 20m per sec.☆彡Hanna#CarryOnLearning
Write 5 advantages of electricity.
Answer:
Quick, Efficient, Reliable, Safe and Continous
Answer:
Five advantages of electricity are :Advantages
It is transportable over long distances
It is silent
It can be used produce magnetic fields, which can be used to propel motors
It is very transformable
It is very fast, virtually the speed of light
It can be used to produce other forms of radiant energy, such as radio waves, microwaves, radiant heat and light
The name of the SI unit for force is the watt
\
Explanation:
The name of the SI unit for force is NEWTON .
ur statement is false
have a nice day
A hippopotamus laying on the rock exerts 10,000 N on the rock. The rock has a mass of
2 tons. How much work is being done? Be sure to show your work.
Answer:
Explanation:
If the hippo is laying on the rock, I'm assuming that there is no movement going on at all, in either the hippo or the rock. If no movement occurs, there is no work being done.
Please help meeeeeeeeeeeeeeeeee??????????!!!!!?!!??!!?!!!?
( Just answer 1 & 2) Please help! This is the last thing I have to do. I will mark brainliest asap!!
Answer:
1. Formula = distance/time
D= 112.0 meters, time =4 secs
Speed = d/t =112.0/4
= 28m/s
2.Formula = distance/time
D= 1/4 x 16093.44 m
= 402.35m
Time = 15secs
Speed= d/t
= 402.35/15
=26m/s
A strong magnetic field surrounds Earth. How does Earth’s magnetic field help humans?
It holds people’s belongings tight to Earth’s surface.
It’s responsible for cycling water through Earth’s four spheres.
It keeps the solar wind from reaching Earth.
It helps people navigate using a compass.
It helps cool Earth’s surface.
Answer:
-It holds people's belongings tight to Earth's surface
-it helps cool Earth's surface
- it keeps the solar wind from reaching earth
A dart with a mass of 0.5kg is thrown at 15m/s and sticks into a 1kg apple hanging
on a string. What is the total momentum of the objects before the collision?
Answer:
Before the collision:
m v1 = .5 kg * 15 m/s = 7.5 kg-m/s
Incidentally, after the collision
(M + m) v2 = 7.5
v2 = 7.5 / (1 + .5) = 5 m/s
difference between local system and si system
Answer:
In antiquity, systems of measurement were defined locally: the different units might be defined independently according to the length of a king's thumb or the size of his foot, the length of stride, the length of arm, or maybe the weight of water in a keg of specific size, perhaps itself defined in hands and knuckles.
Systems of Measurement: there are two main systems of measurement in the world: the Metric (or decimal) system and the US standard system. ... The US Standard system uses units that have no predictable relationship to each other. For example, there are 2 cups in a pint, but 4 quarts in a gallon.
A cylinder has length "L" and area of cross-section "A" what is its volume
Answer:
[tex]{ \tt{volume = \pi {r}^{2} h}}[/tex]
A small 175-g ball on the end of a light string is revolving uniformly on a frictionless surface in a horizontal circle of diameter1.0 m.
Complete question:
A small 175-g ball on the end of a light string is revolving uniformly on a frictionless surface in a horizontal circle of diameter 1.0 m. The ball makes 2.0 revolutions every 1.0 s. What are the magnitude and direction of the acceleration of the ball?
Answer:
The acceleration of the ball is 78.98 m/s², directed inwards
Explanation:
Given;
mass of the ball, m = 175 g
radius of the circle, r = 0.5 m
angular speed of the ball, ω = 2 rev/s
The magnitude of the centripetal acceleration of the ball is calculated as follows;
[tex]a_c = \omega^2 r\\\\where;\\\omega \ is \ angular \ speed \ in \ rad/s\\\\a_c = (2\ \frac{rev}{s} \times \frac{2\pi \ rad}{1 \ rev} )^2 \times (0.5 \ m)\\\\a_c =78.98 \ m/s^2[/tex]
The centripetal acceleration is directed inwards.
A battery-powered set of five patio lanterns is connected in series. An ammeter measures the current through the battery as 0.75 A. The total resistance of the circuit is 52 0. (a) Calculate the voltage drop across the battery. (b) Calculate the voltage drop across each load.
(a) 39 V
(b) 7.8 V
Explanation:(a) Neglecting the internal resistance of the battery, the voltage drop (V) across the battery is found from Ohm's law as follows;
V = IR -------------------------(i)
Where;
I = current through the battery
R = total resistance of the circuit.
From the question;
I = 0.75A
R = 52.0Ω
Substitute the values of I and R into equation (i)
=> V = 0.75 x 52.0
=> V = 39Volts
Therefore, the voltage drop across the battery is 39 Volts
(b) Since the set of lanterns is connected in series, then the same current flows through each of the lanterns. Also, since the lanterns are identical, the resistance ([tex]R_{L}[/tex]) of each of them is given by the total resistance (R = 52.0Ω) divided by the number of lanterns. i.e
[tex]R_{L}[/tex] = [tex]\frac{52.0}{5}[/tex]
[tex]R_{L}[/tex] = 10.4Ω [Each lantern has a resistance of 10.4Ω]
The current flowing through them is the same as the current (I = 0.75A) flowing the circuit.
Therefore, using Ohm's law, the voltage drop ([tex]V_L[/tex])across each load (lantern) is
[tex]V_L[/tex] = I x [tex]R_{L}[/tex]
[tex]V_L[/tex] = 0.75 x 10.4
[tex]V_L[/tex] = 7.8Volts
Therefore, the voltage drop across each load is 7.8 Volts
Having greater or less electrons possessed by an object. Can attract or repel.
A. proton
B. magnetism
C. charge
D.magnet
Answer:
A. Proton
Explanation:
Given that an electron has a net negative charge equal in magnitude to the charge of a proton (1.602 × 10⁻¹⁹) but having an opposite (negative) sign to that of a proton, and given that like charges (negative to negative) repel and unlike charges attract, an object having;
Greater electron will be negatively charged relative to the other object, to which it is compare, which is a proton will attract the (positively charged) proton
Lesser negative charge compared to the proton; therefore, both objects will be positive, and they will repel each other
We therefore have;
Having greater or less electrons possessed by an object. Can attract or repel a proton
The correct option is option A. proton
What is a frequency of a ships whistle if the velocity of sound is 340 meters/ second and the wave length is 1.70?
A.)200 hertz
B.)253hertz
C.)340hertz
D.)532hertz
Answer:
A
Explanation:
As u will divide the sound of air with The length which is also the alternative formula for calculating frequency
Un hombre parado en el techo de un edificio, tira una bola verticalmente hacia arriba con una velocidad de 12m/s, la bola llega al suelo en 4s. ¿que altura tiene el edificio ?
Respuesta:
24m
Explicación:
Según la ecuación de movimiento
v = u + en
Dado
Velocidad final v = 12 m / s
velocidad inicial u = 0 m / s
tiempo t = 4s
Sustituir
12 = 0 + 4a
a = 12/4
a = 3 m / s²
Lo siguiente es obtener la distancia;
S = ut + 1 / 2at²
S = 0 (4) + 1/2 (3) (4) ²
S = 3 * 16/2
S = 48/2
S = 24 m
Por lo tanto, la distancia requerida es de 24 m.
Incident beam
Which order is the brightest?
Answer:
mark me as the brainliest plss
Calculate the average velocity of the cart for each fan mass. Round your answers to the nearest tenth.
The cart with Low fan mass has an average velocity of cm/s.
The cart with Medium fan mass has an average velocity of cm/s.
The cart with High fan mass has an average velocity of cm/s.
Answer:
Part A
The cart with low fan mass has an average velocity of approximately 63.29 cm/s
Part B
The cart with medium fan mass has an average velocity of approximately 45.[tex]\overline{045}[/tex] cm/s
Part C
The cart with high fan mass has an average velocity of approximately 36.496 cm/s
Explanation:
Part A
The average velocity is given as follows;
[tex]Average \ velocity, v_{average} = \dfrac{Total \ distance}{Elapsed \time \ to \ finish \ line} = \dfrac{\Delta x}{\Delta t}[/tex]
The average velocity for the 2 kg fan mass, which is the cart with low fan mass, is [tex]v_{average}[/tex] = 500 cm/7.9 s ≈ 63.29 cm/s
The cart with low fan mass has an average velocity [tex]v_{average}[/tex] ≈ 63.29 cm/s
Part B
The average velocity of the cart with medium fan mass, 4 kg, is [tex]v_{average}[/tex] = 500 cm/11.1 s = 45.[tex]\overline{045}[/tex] cm/s
The cart with medium fan mass has an average velocity [tex]v_{average}[/tex] ≈ 45.[tex]\overline{045}[/tex] cm/s
Part C
The average velocity of the cart with high fan mass, 6 kg, is [tex]v_{average}[/tex] = 500 cm/13.7 s = 36.496 cm/s
The cart with high fan mass has an average velocity [tex]v_{average}[/tex] ≈ 36.496 cm/s.
Answer:
its
67.6
78.1
89.3
Explanation:
i just took the assignment, 2021.
chef in a local restaurant bought a bag of rice but he was puzzled to see some impurities such as sand, salt and some stapler pins mixed with the rice. Help him to separate the impurities. Sort the type of impurities ( Soluble/Insoluble) present in the bag.
Answer:
Soluble - salt
Insoluble - sand and stapler pins
Explanation:
The salt is soluble because it is an ionic solid which ready dissolves in water to form a solution.
The sand is insoluble because, it is a non-metallic solid which does not readily dissolve in water while, the stapler pin is insoluble because it is a metallic solid which does not readily dissolve in water.
