Answer:
50 Joules
Explanation:
Work (J) = Force (N) x Distance (m)
Work (J) = 200 N x 0.25 m
Work = 50 Joules
Work is converted to kinetic energy when the arrow is released.
A man drives south to work every day. If his 55 mile
commute usually takes 0.75 hours, what is his average velocity?
Answer:
73.34 mph to 2dp
Explanation:
veolcity = distance/ time
55 / 0.75 = 73.34 mph
A person drives for 1.00 h at 10.0 km/h and 2.00 h at 20.0 km/h. What is their average speed, in SI units?
A.
4.63 m/s
B.
16.7 km/h
C.
10.3 mph
D.
16.7 m/s
A 4.0 kg 4.0kg4, point, 0, start text, k, g, end text box slides with an initial speed of 3.0 m s 3.0 s m 3, point, 0, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction towards a spring on a frictionless horizontal surface. When the box hits the spring, the spring compresses and stops the box momentarily. The spring constant k = 125 N m k=125 m N k, equals, 125, start fraction, start text, N, end text, divided by, start text, m, end text, end fraction.
Answer:
x = 0.537 m
Explanation:
In this exercise we are asked to find the distance that the spring is compressed, let's use the concepts of conservation of energy
starting point. Before touching the spring
Em₀ = K = ½ m v²
final point. When the spring has maximum compression
[tex]E_{f}[/tex] = [tex]K_{e}[/tex] = ½ k x²
as there is no friction the mechanical energy is conserved
Em₀ = Em_f
½ m v² = ½ k x²
x = [tex]\sqrt{\frac{m}{k} }[/tex] v
let's calculate
x = RA[tex]\sqrt{\frac{4.0}{125} }[/tex] 3.0
x = 0.17888 3.0
x = 0.537 m
Answer:
0.54
Explanation:
You round the original number with two significant digits
0.537 has to be 0.54
5. The entrance of a science museum features a funnel into which marbles are rolled one at a time. The marbles circle around the wall of the funnel, eventually spiraling down into the neck of the funnel. The internal radius of the funnel at the top is 0.54 m. At the bottom, the funnel's neck nar- rows to an internal radius of 0.040 m. A 2.5 x 10-2 kg marble begins rolling in a large circular orbit around the funnel's rim at 0.35 rev/s. If it continues moving in a roughly circular path, what will the marble's angular speed be as it passes throught the neck of the funnel? (Consider only the effects of the conservation of angular momentum.)
Answer:
400.7886829 rad/s
Explanation:
First we have to turn our 0.35 rev/s into rad/s using the equation
(Xrev/s)*2pi=Xrad/s we can plug in .35*2pi=.7pi rad/s
Now we can us the equation m_1*v_1*r_1^2=m_1*v_2*r_2^2 we can plug in the given. Because the mass remains the same we can cross it off of both sides giving us just: v_1*r_1^2=v_2*r_2^2
(.7pi)*(.54)^2=(v_2)*(.04)^2
(.20412pi)=(v_2)*(.0016) [.20412pi=.6412618925]
then using division on both sides we get
(.6412618925/.0016)=v_2=400.79rad/s(This answer is rounded to the nearest hundreth)
See you in Mr.K's class tomorrow! -Ruben
The marble's angular speed as it passes through the neck of the funnel is 36.225 rev/s.
What is the conservation of angular momentum?The conservation of angular momentum states that the angular momentum of an object is conserved when there is no external torque acting on it.
We have,
The marble is rolling in a large circular orbit around the rim of the funnel. The angular momentum of the marble can be expressed as:
L = Iω
where L is the angular momentum, I is the moment of inertia, and ω is the angular velocity.
Now,
Since the marble is rolling in a circular orbit around the rim of the funnel, we can approximate its moment of inertia as a point mass rotating around a fixed axis.
The moment of inertia of a point mass rotating around an axis is given by:
I = mr²
where m is the mass of the marble and r is the radius of the circular orbit.
At the top of the funnel,
The radius of the circular orbit is equal to the internal radius of the funnel,
r = 0.54 m.
At the bottom of the funnel,
The radius of the circular orbit is equal to the internal radius of the funnel's neck,
r = 0.040 m.
Now,
Using the conservation of angular momentum,
We can equate the angular momentum of the marble at the top of the funnel to the angular momentum of the marble at the bottom of the funnel.
[tex]I_1W_1 = 1_2W_2[/tex]
Substituting the expressions for the moment of inertia at the top and bottom of the funnel, and solving for [tex]W_2[/tex].
[tex]W_2[/tex] = [tex](I_1/I_2)[/tex][tex]W_1[/tex]
[tex]W_2[/tex] = (m[tex]r_1^2[/tex])/(m[tex]r_2^2[/tex]) [tex]W_1[/tex]
[tex]W_2[/tex] = (r1/r2)^2[tex]W_1[/tex]
[tex]W_2[/tex] = (0.54/0.040)²(0.35 rev/s)
[tex]W_2[/tex] = 36.225 rev/s
Therefore,
The marble's angular speed as it passes through the neck of the funnel is 36.225 rev/s.
Learn more about angular momentum here:
https://brainly.com/question/29563080
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How long does it take a train accelerating from 25.4 m/s to 81.2 m/s to cover 2130 m?
A. 40.0 s
B. 76.3 s
C. 20.0 s
D. 38.2 s
Answer:
C: 20.0s
Explanation:
Why is physical activity important?
O It helps keep you healthy.
It helps control your weight
It helps imcove your balance and coordination
All of the Above
at least one activity you can enjoy to help you get your 60 min
Answer:
All of the Above
walking
Abby is writing a biography of Isaac Newton. He was a brilliant English scientist who developed the law of universal gravitation in the 1600s. Newton also developed laws of motion and ideas about inertia. His laws and ideas were used in many subjects such as physics, astronomy, and mathematics. Explain inertia using Newton's first law of motion. Give an example of inertia.
Answer:
Over several years, Newton worked until he had developed the law of universal gravitation, which debuted in his book Mathematical Principles of Natural Philosophy (1869). This idea stood until the concepts of quantum theory and relativity were posed in the mid 19th century.
Learn more about Newton's of Motion here:
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Using a box covered with graph paper allows you to simulate which aspect of a car crash?
Answer:
a computer modeling
Explanation:
what equation links charge flow, current and time?
I will award Brainliest if CORRECT!
Answer:
Q=it
Explanation:
[tex] \purple {\bold {Q = it}} [/tex] is the equation equation that links charge flow, current and time.
Here,
Q = Charge
i = current
t = time
In what kind of reaction do hydrogen gas (H2) and oxygen gas (O2) form
water (H20)?
A. Replacement
B. Displacement
C. Combination
D. Decomposition
Answer:
combination
Explanation:
In the equation to make h20 they are both their; they combine to make h20 PLEASE AMRK BRAINLIEST I NEED IT ヾ(•ω•`)o
I WILL MARK BRAINLIST PLEASE HELP!
Describe how the motion of the particles within the popcorn changes as thermal energy is transferred. How do they start out? How does that change? What other transformations occur?
Answer:
Generally, when thermal energy is transferred to a material, the motion of its particles speeds up and its temperature increases. There are three methods of thermal energy transfer: conduction, convection, and radiation. ... Convection transfers thermal energy through the movement of fluids or gases in circulation cells.
Explanation:
Answer:
Why do you think transferring energy into or out of a substance can change the molecules’ freedom of movement?
Explanation:
We know that transferring energy can cause a change in molecules' freedom of movement. Another way to say this is that transferring energy into or out of a substance can cause a phase change.
IS THIS CORRECT???...........................
Answer:
A. consumers
B. multi-cellular
Explanation:
Only plants have chlorophyll and only plants have a cell wall so C and D are out of the window. They are consumers because, they don't have photosynthesis so they have to eat. They are multi-cellular because, animals all have at least a brain, body, etc. Which all need millions of cells.
A sledgehammer is an example of what kind of simple machine?
A. Wheel and axle
o
B. Screw
c
C. Wedge
D. Lever
SUS
I am 95 percent sure the answer in C
Answer: C
Explanation:
In which general compass traction is this hurricane moving
Answer:
It looks like its moving north.
Explanation:
A cyclist reduces his speed from 6.5 m/s to 0.0 m/s with an acceleration of
a -1.2 m/s². How long does that take?
Answer:
a= -1.2 m/s^2
Vi= 6.5 m/s
Vf= 0 m/s
t= 0-6.5/-1.2= 5.45 Sec
Explanation:
Prompt Write about what you have learned about parts of the atom and the
Periodic Table. Explain why itis imposant to know about them.
Answer:
The table can be used to predict the properties of elements, even those that have not yet been discovered. Columns (groups) and rows (periods) indicate elements that share similar characteristics. The table makes trends in element properties apparent and easy to understand. The table provides important information used to balance chemical equations. Atoms are important because they form the basic building blocks of all visible matter in the universe. There are 92 types of atoms that exist in nature, and other types of atoms can be made in the lab. The different types of atoms are called elements. Hydrogen, gold and iron are examples of elements comprised of unique types of a single kind of atom.
Explanation:
Is potential energy higher at the equilibrium position?
It took 50 joulss to push a char 5 meters across the floor. With what force was the chair pushed?
Answer:
10 newtons
Explanation:
Work = Force * Distance
50 J = F * 5m
F = 50 / 5 = 10N
Segment D - E : The bus is speed_____ It is gradually increasing it's
A slowing down
B speeding up
C constant speed
D at rest
Plss help
Anybody knows this thanks !
Answer:
225J
Explanation:
1/2mvsq=1/2×50×9
Answer:
b. 225 J
Explanation:
Velocity (v) = 3 m/s
Mass (m) = 50 kg
[tex]K. E. = \frac{1}{2} m {v}^{2} \\ \\ = \frac{1}{2} \times 50 \times {3}^{2} \\ \\ = 25 \times 9 \\ \\ = 225 \: j [/tex]
What happens to the particles of an object when its temperature increases? *
The PE of the particles decreases.
The KE of the particles decreases.
The PE of the particles increases.
The KE of the particles increases.
Answer:KE
Explanation:
What happens to waves near the shore?
Answer As a wave travels across the open ocean, it gains speed. When a wave reaches a shallow coastline, the wave begins to slow down due to the friction caused by the approaching shallow bottom. ... Think of it like driving a car at high speed and then slamming on the breaks. Everything is going to fly to the front.:Waves at the Shoreline: As a wave approaches the shore it slows down from drag on the bottom when water depth is less than half the wavelength (L/2). The waves get closer together and taller. ... Eventually the bottom of the wave slows drastically and the wave topples over as a breaker. hope this helps have a nice night❤️❤️❤️
Explanation:
Hi I'm trying to find the friction coefficient using the mass, change in height, and displacement of an object
Where is a storm surge located, in relation to the storm?
Answer:
Storm surge is the additional water, above the normal tidal ocean water, caused by the wind and low pressure of a hurricane. It is added to whatever the tide happens to be when the storm hits. If the storm hits at high tide then it’s X feet above the high tide. Tides fluctuates based upon the time of the year and the cycle of the moon.
Explanation:
Answer:
Storm surge is the additional water, above the normal tidal ocean water, caused by the wind and low pressure of a hurricane. It is added to whatever the tide happens to be when the storm hits. If the storm hits at high tide then it’s X feet above the high tide. Tides fluctuates based upon the time of the year and the cycle of the moon.
Explanation:
- calculate the BMI for a person who is 5'1" and weighs 172 pounds. Before you
calculate the BMI you must convert the height into meters and the weight into kg. You can use
the internet to convert them.
A. 32.9
B. .03
C. 184.86
THIS IS FOR PE PLEASE HELP JTS FOR EXTRA CREDIT
Answer:
It is 32.9
Explanation:
A total lunar eclipse is:
a. Visible only from the path of totality
b. Visible to all observers on the night time side of the earth
c. Visible only during a new moon
d. an opportunity to study the corona of the sun
Answer:
B) Visible to all observers on the night time side of the earth
Explanation:
I hope this helps.
Which of the following does Bernoulli's principle help to explain?
A. Flying
B. Surface tension
C. Floating
D. Hydraulics
1
A cat walks 4 meters north, 7 meters east, 4 meters south, and then 3
meters west. What is the cat's displacement? *
Answer:90+80+90=360
Explanation:10x+60–50
What two factors affect work?
Answer:
Money and health?
Explanation:
Answer:
force and displacement.
Explanation:
force and displacement.
Usain Bolt is the fastest human at 12.4 m/s. If Usain Bolt had a mass of 94kg, what was Usain Bolt’s KE?
Answer:The fastest recorded human footspeed was recorded between 60 and 80m in Bolt's world record 9.58-second 100m final in Berlin in 2009. Bolt was clocked at 44.72km/h, which is 27.8mph. The Jamaican covered the distance between 60-80m in a time of just 1.61 seconds
Explanation:
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