Answer:
The centripetal acceleration of the car is 50.4 m/s²
Explanation:
Given;
radius of the track, r = 0.3km = 300 m
constant angular acceleration, α = 4.5 x 10⁻³ rad/s²
during half of a lap, θ = π
Determine time of motion
θ = ωt + ¹/₂αt²
π = 0 + ¹/₂αt²
t² = 2π / α
t² = ( 2 x 3.142) / (4.5 x 10⁻³)
t² = 1396.44
t = √1396.44
t = 37.369 s
Determine the angular velocity
[tex]\omega_f = \omega_i + \alpha t\\\\\omega_f = 0 \ + \ 37.369*4.5*10^{-3}\\\\\omega_f = 0.168 \ rad/s[/tex]
Determine the centripetal acceleration of the car
[tex]\alpha _c = \omega^2 r\\\\\alpha _c = 0.168*300\\\\\alpha _c =50.4 \ m/s^2[/tex]
Therefore, the centripetal acceleration of the car is 50.4 m/s²
A large bottle contains a number of medicinal tablets each having a mass of 250
mg. The mass of all the tablets is 1 kg. Calculate the number of tablets in the bottle.
Given parameters:
Mass of each tablet = 250mg = 0.25g
Mass of all tablets in the bottle = 1kg = 1000g
Unknown:
Number tablets in the bottle = ?
Solution:
The number of tablets in the bottle;
Number of tablets = [tex]\frac{mass of all tablets in the bottle}{mass of each tablet}[/tex]
Mass is the amount of matter that makes up a substance
Number of tablets = [tex]\frac{1000g}{ 250 x 10^{-3} }[/tex] = 4000 tablets
Considering the rule of three, the number of tablets in the bottle is 4.
In first place, the rule of three is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them.
That is, what is intended with it is to find the fourth term of a proportion knowing the other three.
If the relationship between the magnitudes is direct, that is, when one magnitude increases, so does the other (or when one magnitude decreases, so does the other) , the direct rule of three must be applied.
To solve a direct rule of three, the following formula must be followed, being a, b and c known data and x the variable to be calculated:
a ⇒ b
c ⇒ x
So: [tex]x=\frac{cxb}{a}[/tex]
The direct rule of three is the rule applied in this case as follow: if 250 mg = 0.250 g is the mass of 1 medicinal tablet, 1 kg = 1000 g is the mass of how many medicinal tablets?
0.250 grams ⇒ 1 medicinal tablet
1000 grams ⇒ x
Then:
[tex]x=\frac{1000 gramsx1 medicinal tablet}{0.250 grams}[/tex]
x= 4 medicinal tablets
Finally, the number of tablets in the bottle is 4.
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brainly.com/question/12482948?referrer=searchResults brainly.com/question/24534599https://brainly.com/question/25294910?referrer=searchResultsAn 85 kg construction worker has 37,485J of gravitational potential energy. To the nearest whole number,
worker is _________
mabove the ground
Answer:
45m above the ground
Explanation:
got it right on Edg 2020
When a gas increase in thermal energy it will go through...?
A. thermal contraction
B. thermal expansion
C. freeze
D. smell
Answer:
b
Explanation:
Samuel's car has a mass of 3,000 kg. If your car produces a force of 500 N, how fast will it accelerate?
Answer:
The answer is 0.17 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex] a = \frac{f}{m} \\ [/tex]
f is the force
m is the mass
From the question we have
[tex]a = \frac{500}{3000} = \frac{5}{30 } = \frac{1}{6} \\ = 0.166666...[/tex]
We have the final answer as
0.17 m/s²Hope this helps you
A person throws a ball horizontally from the top of a building that is 26.1 m above the ground level The ball lands 112 m away from the base of the building Neglect air resistance and useg = 9.81 m/s ^ 2
Answer:
v = 5.21 m/s
Explanation:
Let the initial speed be v.
The top of a building is 26.1 m above the ground level and the ball lands 112 m away from the base of the building.
We need to find the initial velocity of the ball.
Let it was at rest initially. Using the second equation of motion to find time of flight.
[tex]d=ut+\dfrac{1}{2}gt^2\\\\t=\sqrt{\dfrac{2d}{g}} \\\\t=\sqrt{\dfrac{2\times 26.1}{9.81}} \\\\t=2.3\ s[/tex]
No, using the formula of speed.
[tex]v=\dfrac{d}{t}\\\\v=\dfrac{12\ m}{2.3\ s}\\\\v=5.21\ m/s[/tex]
So, the initial velocity of the ball is 5.21 m/s.
What is the density of this liquid that has a mass of 300g and volume 600ml.
Answer:
0.5
Explanation:
D = M / V
You divide 300g by 600ml and you get 0.5
(✿◠‿◠)
la respuesta es
0.5
espero que te sirva
:-)
How much work is done by a person who used a force of 27.5N to move a grocery cart 12.3
Answer:
workdone = force x displacement
= 27.5 x 12.3
= 338.25 J
Dos masas de 8kg es tan unidas en el extremo de una varilla de aluminio de 400mm de longitud. La varilla está sostenida en su parte media hora en círculos y solo puede soportar una tensión máxima de 800 N ¿cuál es la frecuencia máxima de revolución
Answer:
The maximum frequency of revolution is 3.6 Hz.
Explanation:
Given that,
Mass = 8 kg
Distance = 400 mm
Tension = 800 N
We need to calculate the velocity
Using centripetal force
[tex]F=\dfrac{mv^2}{r}[/tex]
Where, F= tension
m = mass
v= velocity
r = radius of circle
Put the value into the formula
[tex]800=\dfrac{8\times v^2}{200\times10^{-3}}[/tex]
[tex]v^2=\sqrt{\dfrac{800\times200\times10^{-3}}{8}}[/tex]
[tex]v=4.47\ m/s[/tex]
We need to calculate the maximum frequency of revolution
Using formula of frequency
[tex]f=\dfrac{v}{2\pi r}[/tex]
Put the value into the formula
[tex]f=\dfrac{4.47}{2\pi\times200\times10^{-3}}[/tex]
[tex]f=3.6\ Hz[/tex]
Hence, The maximum frequency of revolution is 3.6 Hz.
what is acceleration
Answer:
Explanation:
Acceleration is the rate of change of velocity. Usually, acceleration means the speed is changing, but not always. When an object moves in a circular path at a constant speed, it is still accelerating, because the direction of its velocity is changing.
[tex]{\tt{\red{\underline{\underline{\huge{Answer:}}}}}}[/tex]
[tex]\longrightarrow[/tex] The rate of change of velocity per unit time is called acceleration.
[tex]\longrightarrow[/tex] Its SI unit is m/s².
[tex]\huge\boxed{\fcolorbox{blue}{red}{Thank you}} [/tex]
BMW has introduced a program of covered scheduled maintenance for its cars. That is, when you bring in your vehicle for maintenance at a BMW dealership, BMW will cover the costs of everything (except for worn-out tires). This practice specifically targets which stage of the product life cycle?
Answer:
Usage
Explanation:
A product life cycle refers to the duration from the introduction of the product into the market until it's taken off the shelves.
A program of covered scheduled maintenance for the cars refers to the practice in which the dealership will cover the costs of everything when you bring in your vehicle for maintenance.
In this question, the mentioned practice specifically targets the stage - Usage of the product life cycle
Alice added sodium chloride to water and stirred the water for several minutes. Alice is most likely trying to demonstrate that ionic compounds
A. are hard
B. can dissolve
C. are clear.
D. can melt.
Answer:
Can dissolve
Explanation:
Andrew plays trumpet in the concert band. He holds the trumpet still at his side until it is time for him to play. When it is time, he brings the trumpet up to his mouth and starts to play. Which statement correctly connects the motion of the trumpet with Newton’s first law of motion?
Answer:
Explanation:
I really don’t know
if it takes 3.5 hours for the Hogwarts Express, moving at a speed of 120 mi/hr, to make it from Platform 9 and 3/4 to Hogwarts, how far apart are they?
Why do you think the electron of the hydrogen atom stays close to the proton in the atom’s nucleus?
Answer:
Electrons are retained by the electromagnetic force in the orbit around the nucleus since the nucleus is positively charged in the middle of the atom and absorbs the electrons charged negatively.
Hope this helps!
We have that for the Question "Why do you think the electron of the hydrogen atom stays close to the proton in the atom’s nucleus" it can be said that
Electron of the hydrogen atom stays close to the proton in the atom’s nucleus because hydrogen with a low proton and electron number its repulsion will be low
From the question we are told
Why do you think the electron of the hydrogen atom stays close to the proton in the atom’s nucleus?
Generally
The electrons are father away from the protons in the nucleus as atomic number increasesThis is because of the law of attraction where unlike charges reply
Therefore
For hydrogen with a low proton and electron number its repulsion will be low and Hence electron of the hydrogen atom stays close to the proton in the atom’s nucleus
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Please help me out with my physics
A force of 6.0 N is applied horizontally to a 3.0 kg crate initially at rest on a horizontal frictionless surface. After the crate is pushed for 1.5 seconds, it has a gelocity of 3.0 m/s. Does this support Newton’s second law of motion, that force equals mass times acceleration?
Find by means of a vector (quantity) diagram,
the resultant of two forces of 7N and 3N acting at
right angle to one another
solve
Answer:
which principle prevents a brach from abusing its power
Explanation:
Describe the stratosphere.
What happens to the air pressure when you get closer to Earth?
What are the layers of the atmosphere?
1. The stratosphere is above the troposphere. This layer of the atmosphere is where planes fly. At the top of the stratosphere, there is a ozone layer.
2. The mesosphere is above the stratosphere. Temperatures drastically drop in the mesosphere. It is the middle layer of the atmosphere.
3. Here are the layers of the atmosphere:
TroposphereStratosphereMesosphereThermosphereExosphereHope this helps you!
Convert the following from scientific notation to standard notation.
1. 3.47 x 108
2. 7.94 x 103
3. 1.96 x 10-3
4. 4.50 x 109
5. 9.61 x 10-6
6. 2.02 x 105
7. 7.01 x 10-10
8. 4.44 x 101
Answer:
1.) 347,000,000
2.)7,940
3.)0.00196
4.)4,500,000,000
5.)0.00000961
6.)102,000
7.).000000000701
8.)44.4
Explanation:
when the power is positive, you just need to move decimal point to your right , for a number of times which is similar to the value of the power.
Eg. 3.47×10 raised to the power 8.
with this, move the decimal point to the right eight times which will be 347,000,000.
But when the power is negative, move the decimal point to the left for a number times which will be similar to the value of the power.
Eg. 1.96×10 raised to the power negative 3.
move the decimal point leftwards three times which will be 0.00196
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the energy transferred by a force of a moving object
Answer:
kinetic or mechanical cant remember
Explanation:
Answer:
Hey!!
Kinetic Energy is your answer!
Explanation:
I hope this helped you!
a child riding a bicycle at 15 meters per second accelerates at -3,0 meters per second? for 4.0 seconds. What is the child's speed A at the end of this 4.0-second interval? (with work, all steps))
Answer:
27m/sExplanation:
Given data
initital velocity u=15m/s
deceleration a=3m/s^2
time t= 4 seconds
final velocity v= ?
Applying the expression
v=u+at------1
substituting our data into the expression we have
v=15+3*4
v=15+12
v=27m/s
The velocity after 4 seconds is 27m/s
A cricket stump has a sharp point at one end use the words force area or pressure
Answer:
using the pressure of stump
Answer: Using the pressure of a stump
A plane drops C.A.R.E package to some needy people in the jungle from a height of 1,000 meters.How long will it take the package to strike the ground?
A 52-kg bike is moving along a smooth road at a constant velocity of 8.4 m/s. What is the net force acting on the bike
Answer:
0 N
Explanation:
Net force = mass × acceleration
∑F = ma
The velocity is constant, so the acceleration is 0. Therefore, the net force is 0.
The net force acting on the bike is 0 N.
What is net force?Net force is the sum of all forces acting on an object. The net force can be calculated using Newton's second law, which states that F = ma, where: F is the net force. m is the mass of the object. a is acceleration.
The velocity is constant, so the acceleration is 0. Therefore, the net force is 0 N.
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If the total age of three brothers Jack Sam and DeMarco is 33 what are the ages of the boys if Sam is half of the age of Jack and DiMarco is two years younger than Jack
Answer:
Jack is 14, DiMarco is 12, Sam is 7
Explanation:
A physics book is moved once around the perimeter of a table of dimensions 1.0m by 2.0 m. a. if the book ends up in its initial position, what is its displacement? Type here b. What is the distance traveled?
Answer:
A. 0 m.
B. 6 m.
Explanation:
Displacement is final position to initial position in the shortest length possible, if you end at your initial position then your displacement is basically 0.
Since the book traveled along the perimeter of a table of 1m and 2m then its perimeter is a total of 6m, which is basically how far the book traveled.
Object B has a mass of 10 kg and is moving at a velocity of 2.2 m/s. So object B’s momentum is ___ kg •m/s
Answer:
22
Explanation:
becuase is you do 10kg times 2.2= 22m/s
Object B has a mass of 10 kg and is moving at a velocity of 2.2 m/s. So object B’s momentum is 22 kg.
What is momentum in real life?The momentum of an object is given with the aid of the made from its mass and the rate. this may be understood genuinely with the help of an instance. A Cricket ball is heavier than a tennis ball. If each of the balls is thrown at the same speed. Greater pressure is required to forestall the cricket ball.
What is the momentum of an object?Momentum is the amount of movement and is compounded by using the quantity of the problem moved and the velocity with which it moves. The item has a tendency to be in movement and therefore is a vector amount. it's far determined by using the made from the mass of the object and its velocity.
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Two dimensional motion
Answer:
In two-dimensional projectile motion, such as that of a football or other thrown object, there is both a vertical and a horizontal component to the motion. ... The key to analyzing two-dimensional projectile motion is to break it into two motions, one along the horizontal axis and the other along the vertical.
Answer:
In two-dimensional projectile motion, such as that of a football or other thrown object, there is both a vertical and a horizontal component to the motion. ... The key to analyzing two-dimensional projectile motion is to break it into two motions, one along the horizontal axis and the other along the vertical.
A lithium atom has 3 protons, 4 neutrons and 3 electrons. How would the atom change to become a cation? How would the atom change to become an anion?
Answer:
- For the lithium ion to change to become an anion, it will have to gain one or more electrons which can be pulled away from possibly other atoms with a weaker affinity for them.
- For the lithium ion to change to become a cation, it will have to loose one or more electrons which can be drawn by other atoms with a stronger affinity for them.
Explanation:
Generally, an anion has a net negative charge arising from the fact that it has more electrons than protons while a cation has a net positive charge arising from the fact that it has more protons than electrons.
Now, for the lithium ion to change to an anion, it means it has to have more electrons than it's protons. Thus, since it has 3 number each of protons and electrons, it will have to gain one or more electrons which can be pulled away from possibly other atoms with a weaker affinity for them.
Now, for the lithium ion to change to a cation, it means it has to have more protons than it's electrons. Thus, since it has 3 number each of protons and electrons, it will have to loose one or more electrons which can be drawn out by possibly other atoms with a stronger affinity for them.
who has a iphone (age range 15-19 )
Hi friend! I have an iPhone. why do you ask????