Answer:
The impulse received by the ball from the floor during the bounce is approximately 1.11329438 m·kg/s
Explanation:
The given mass of the ball, m = 86 g = 0.089 kg
The height from which the ball is dropped, H = 2.87 m
The height to which the ball bounces, h = 1.28 m
Mathematically, we have;
Δp = F·Δt
Where;
Δp = The change in momentum = m·Δv
F = The applied force
Δt = The time of contact with the force
The velocity of the ball just before it touches the ground, v₁ = -√(2·g·H)
The velocity with which the ball leaves, v₂ = √(2·g·h)
The change in momentum, Δp = m·(v₂ - v₁)
∴ Δp = m·(√(2·g·h) - (-√(2·g·H))) = m·(√(2·g·h) +√(2·g·H) )
The impulse, Δp, received by the ball from the floor during the bounce is given as follows;
Δp = 0.089 kg × (√(2 × 9.8 m/s² × 1.28 m) + √(2 × 9.8 m/s² × 2.87 m)) ≈ 1.11329438 m·kg/s
The impulse received by the ball from the floor during the bounce, Δp ≈ 1.11329438 m·kg/s
Simple Question! Help!
If a bus takes 60 mins to go from
Dubai to Sharjah covering a distance of 60 km then what is the speed of the bus in km/h?
60km/hr..
I think so....
60 km/s
step-step wise explaination:60 kilometers / 60 minutes
= 1 kilometer / minute
as we know to convert kilometer / min we should multiply 60 to speed value
therefore, (1×60/ 1) km/hr=60 km/ hr
if you want to know why 60 multiplied with it then read this
1 km/min to km/hr
1 minute = 1/60 hour
so, for converting minute to hour we multiply 1/60
when it goes to top then it multiplied
I know it's little complicated let see it by equation
1 km/min = (1 / 1×1/60) km/h
=(1 / 1/60) km/hr
= 60 km/hr
( note there is no change in km so it remains without multiplied)
anyone know how to do this ?
If a constant fotce of 490 newtons is applied to an object and it proceeds to accelerate in the opposjte direction at 9.8 meters per second, every second, what is its mass?
Answer:
50 kg
Explanation:
f=ma
Force = mass x acceleration
490 = 9.8 x m
m = 50 kg
which element has the highest atomic number,oxygen or aluminum
Answer:
Aluminum has the highest atomic number
true or false if false correct the false statements :
a- the transformation of electric energy into themal energy is called joule's effect.
b - when a liquid is at rest , the pressure is at the same at any point within this liquid
Answer:
both statements are truth
Explanation:
a-The Joule effect, also called Joule's law, is the thermal manifestation of electrical resistance. ... In all these cases, it is intended to generate thermal energy with electricity passing through its conductors. This heat they give off is due to the Joule effect.
b-sure of a liquid tank depends only on the density of the liquid and depth from the free surface. It is a scalar quantity and is same in all directions, at a point.
An insulator________the loss of heat energy.
A.)speeds up
B.)slows down
which one is it?
Answer:
A) speed up
is the correct option
Answer:
slows down
Explanation:
As the temperature difference decreases the rate of transfer slows (hope this helps)
Help !!
You are using sonar over a spot in the ocean known to be 91.8 m deep. The system emits a 50.0-kHz pulse into the water. It takes 120.0 ms for the sound to travel to the ocean floor and back to the sonar system. Determine the speed of sound in the ocean and the wavelength of the sonar pulse.
Answer:
a. Speed = 765 m/s
b. Wavelength = 0.0153 m
Explanation:
Given the following data;
Distance = 91.8m
Time = 120 milliseconds to seconds = 120/1000 = 0.12 seconds
Frequency = 50KHz = 50 * 10³ = 50000 Hz
a. To find the speed of sound in the ocean:
Speed = distance/time
Speed = 91.8/0.12
Speed = 765 m/s
b. To find the wavelength;
Wavelength = speed/frequency
Wavelength = 765/50000
Wavelength = 0.0153 m
Question
On a circular race track with a radius of 3.23 km, a
certain road car set a speed record of 372 km/h.
Complete Question:
On a circular race track with a radius of 3.23 km, a certain road car set a speed record of 372 km/h. What was the car's centripetal acceleration?
Answer:
Centripetal acceleration = 3.306 m/s²
Explanation:
Given the following data;
Radius, r = 3.23 km to meters = 3.23 * 1000 = 3230 m
Velocity = 372 km/h to meters per seconds = 372*1000/3600 = 103.33 m/s
To find the centripetal acceleration;
Centripetal acceleration = velocity²/radius
Centripetal acceleration = 103.33²/3230
Centripetal acceleration = 10677.09/3230
Centripetal acceleration = 3.306 m/s²
A machine does 1200 J of work in 1 min. What is the power developed
by the machine? (Power = Work/time) in Watts OR Joules/second
Answer:
20 watts
Explanation:
Big brain mode activated:
Power=1200J/60sec
Power=20 watts
what happens if one part of the body breaks down
Answer:
all the body parts work together to make your body function properly, so therefore, a lot of other body parts will break down
If 550 J of work is done to pull a box horizontally across the floor 4.6m, what is the force of friction between the box and floor?
The work done is the product of the force and resulted displacement. The frictional force between the box and floor is 119.5 N.
What is force?Force is external factor acting on a body to make a change in the state of an object . According to Newton's second law of motion, force is the product of mass and acceleration.
The work done in physics is the product of force acting on a body and its displacement. Therefore, the force which result in a displacement of the body is said to be work done on the object.
Here, the work done by frictional force is 550 J and displacement is 4.6 m.
Therefore, the force = work done / displacement
= 550 J/ 4.6 m
= 119.5 N.
Hence, the force between the floor and box will be 119.5 N.
To find more on frictional force, refer here:
https://brainly.com/question/1714662
#SPJ2
How much is the velocity of a body
when it travels 6oo meter in 5 minute ?
Answer:
velocity=2m/s
I hope it's helps you
Answer:
Its average speed, pretending that it traveled at a constant speed, is
v = s / t
= 600 m
5 x 60 s
= 2 m/s
Hope it help...
Havea great day
The speed of a wave in a medium is effected by____,____, and____
[tex]\huge\mathfrak\green{answer}[/tex]
As per as my knowledge
The speed of a wave in a medium is affected by density, wavelength and temperature :)
(Good luck on your test and mark me brainliest if this helps)
What is happening to the water molecules as it changes from ice to liquid water? *
They are losing energy, can’t move only vibrate
They are gaining energy, can move and slide past each other
They are moving at high speeds and are far from each other
They are gaining energy, moving slowly until they evaporate
Answer:
They are gaining energy, can move and slide past each other.
Explanation:
Because as ice melts, the molocules gain energy/heat which warm them up and are able to slide/move apart from each other.
A turtle moves at an average speed of 0.2m/S towards the finish line that is 80m away from the starting line. A rabbit,racing with the turtle,leaves the starting line 5.4 minutes after the turtle. The speed of the rabbit is 3.6km/h. Which one of them wins the race? Justify
Answer:
5.6mls
Explanation:
a wave has a period of 2.0 s. what is its frequency?
Answer: Frequency of 1 ÷ 2 = 0.5 Hz.
pls help meeee!!! will mark brainliest!!
Answer:
water
is missing in above equation
hope it helps
Solve for x and y algebraically:
x + y = 8 and 3x + 2y = 21
Explanation:
ans ...(5,3)..............
Answer:
x = 5
y = 3
Explanation:
x + y = 8 and 3x + 2y = 21
Here We use Substitution Method
x + y = 8 ...(1)
3x + 2y = 21 ...(2)
From equation (1) we get
x + y = 8
x = 8 - y
Now the value of x = 8 - y in equation (2)
3(8 - y) + 2y = 21
24 - 3y + 2y = 21
- y = 21 - 24
y = 3
Then Put the value of y in equation (1)
x + (3) = 8
x + 3 = 8
x = 8 - 3
x = 5
Thus The value of x is 5 and y is 3
For Verification Only:x + y = 8
5 + 3 = 8
8 = 8
3x + 2y = 21
3(5) + 2(3) = 21
15 + 6 = 21
21 = 21
L.H.S = R.H.S
-TheUnknownScientist
Can we have the Doppler effect with light waves? How?
Answer:
Besides sound and radio waves, the Doppler effect also affects the light emitted by other bodies in space. If a body in space is "blue shifted," its light waves are compacted and it is coming towards us. If it is "red shifted" the light waves are spread apart, and it is traveling away from us.
Explanation:
An object moving at 40 m/s takes 10 s to come to a stop. What is the object’s acceleration?
Answer:
-4 m/s^2
Explanation:
v=vo+at
0=40+a(10)
-40=a(10)
-4=a
1) Un perito fue encomendado para determinar si un trozo de metal muy parecido al oro de 0,75 kg. Y de volumen 340 cm3. Era en verdad dicho metal, use las características de la densidad de un cuerpo para ayudar al perito.
Answer:
Primero, sabemos que la densidad de el oro es:
Densidad = 19.3 g/cm^3
Sabemos que nuestro metal tiene una masa de 0.75 kg, y un volumen de 340 cm^3.
Primero deberíamos reescribir la masa en gramos, pues la densidad está escrita en gramos.
Sabemos que:
1 kg = 1000g
Entonces:
0.75 kg es 0.75 veces 1000g, esto nos da:
0.75kg = 0.75*(1000g) = 750g
Entonces tenemos:
masa = 750g
volumen = 340cm^3
Ahora debemos recordar que:
densidad = masa/volumen
Entonces la densidad de este metal es:
densidad = 750g/340cm^3 = 2.21 g/cm^3
Si la comparamos con la densidad del oro, podemos ver que esta es mayor.
Entonces podemos concluir que este metal no es oro.
HELP HWLP HELPPP AHHH
Answer:
x) KE and GPE
y) Only GPE
z) Only KE
Explanation:
From the diagram, we have;
1) At point X, the gall is at an elevation higher than the thrower, therefore, the ) ball has (gravitational) potential energy, GPE, because it can fall to a lower level unassisted from the height it was thrown
And the ball is also in upward motion, with which it reaches the height 'Y', therefore, the ball has kinetic energy, KE, to move higher
2) At point 'Y' which is the maximum height, the ball no longer moves upwards and momentarily, the ball has no vertical motion, therefore, the ball has only energy due to height, which is the gravitational potential energy, GPE
3) At the point Z, at the instant just before the ball touches the ground, the elevation of the ball above the ground is small, while the velocity of the ball is close to maximum velocity, therefore, the ball has Only kinetic energy, KE
AND THIS ONE PLEASE PLEASE PLEASE
Answer:
The answer is D
Atmospheric pressure on that day is 1.0 multiply 10 to the power of 5 Pa. calculate the total pressure at the bottom of the pond
Answer:
Water pressure P=ρgh (density X acceleration due to gravity X height of water)
P=1000X9.8x3=29,400 N/m2 or Pascal
But there is air pressure over water which also adds to the pressure at the bottom of the pool.
Therefore,Atmospheric pressure over the water=1.01 x 105 N/m2
So the total pressure on the bottom of the pool = 29,400+ 101000 Pa
= 130,400 Pa
Explanation:
What is the molarity (concentration) of 25.2 grams of NaF dissolved in a total volume of 0.75 liters?
Answer: concentration c = 25.2 g /(41.99 g/mol × 0.75 l)
Explanation: M(NaF) = 41.99 g/mol and amount of substance n = m/M.
Concentration c = n/V
What is the molarity (concentration) of 25.2 grams of NaF dissolved in a total volume of 0.75 liters is 0.8 mol/liter.
What is Molarity ?
Molarity shows the concentration of solute in the given solution. It is defined as no. of moles of solute present in 1 liter of solution. It is denoted by M. its SI unit is mol/L.
Hence, molarity is given by,
Molarity = No. of moles of solute ÷ Volume of the solution in liters
Given,
mass of NaF = 25.2 g
Volume of the solution = 0.75 liters
Molarity = ?
Let's find No. of moles of the solute.
NaF has one Na and one F.
Molar mass of NaF is,
Na = 22.98*1 = 22.98
F = 18.99*1 = 18.99
Molar mass of NaF is 22.98+18.99= 41.97 g/mol
No. of moles of the solute is,
25.2g of NaF × (1÷41.97 ) mol/g = 0.6 mol.
Molarity of NaF is,
Molarity = No. of moles of solute ÷ Volume of the solution in liters
M = 0.6 mol ÷ 0.75 liters
M = 0.8 mol/liter
Hence molarity of NaF is 0.8 mol/liter.
To know more about molarity, click :
https://brainly.com/question/2817451
#SPJ3.
What is the differece between force and motion?
Answer:
---
Explanation:
Force is like the amount of push
Motion is the result of Push
_____ is not a unit of pressure. *
A) armstrong
B) atmosphere
C) millimeter of mercury
D) Pascal
Answer:
A) Armstrong is not a unit of pressure. In fact, I don't think it's even a unit at all, an "Amstrong" is a unit of length, if that's what you meant.
Atmospheres, Millimeters of mercury, and Pascals are all units of pressure.
Let me know if this helps!
Objects 1 and 2 attract each other with a gravitational force of 36.0 units. If the distance separating Objects 1 and 2 is changed to one-third the original value, then the new gravitational force will be units.
Answer:
324 units
Explanation:
Given that,
Objects 1 and 2 attract each other with a gravitational force of 36.0 units.
The distance separating Objects 1 and 2 is changed to one-third the original value.
Let the new force be F' and r'=r/3. so,
[tex]F=\dfrac{kq_1q_2}{r^2}[/tex]
[tex]F'=\dfrac{kq_1q_2}{r'^2}\\\\F'=\dfrac{kq_1q_2}{(\dfrac{r}{3})^2}\\\\=9\times \dfrac{kq_1q_2}{r^2}\\\\=9F\\\\=9\times 36\\\\=324\ \text{units}[/tex]
So, the new force become 324 units.
IIIIIIIIII neeeeeed helppppp again?
Answer:
The Principle of Progression
(I searched it up since I never learned this)
Explanation:
The principle of progression states that a person should start slowly and increase exercise gradually. Since Mandy is just getting started on her exercise routine, she should begin with a few workouts over a large span of time, then work her way up so she can do more workouts in a shorter span of time.
An object of mass 4.0 kg is dropped from a height of
1000 m from a helicopter. The air resistance acting
against the parachute exerts a steady upward force of 35 N. Calculate the kinetic energy of the object when it reaches the ground and hence find its velocity.