Answers
Answer:
Explanation:
You have given us a very weird question. Things do not mesh
If the mass is 500 kg and sits 25 m above the lowest spot on the track, the potential energy is
PE = mgh = 500(9.8)(25) = 122500 Joules,
not the reported 61250 Joules
So either the Joules is incorrect or the mass is supposed to be 250 kg.
In either case, in the absence of friction, the potential energy will convert to kinetic energy.
½mv² = mgh
v = √2gh
which does not involve the use of either Joules or kilograms.
Maximum velocity when starting from rest is
v = √(2(9.8)25) = √490 = 22.135943...
v = 22 m/s
Related Questions
Calculations, show formula, substitution, and answer with units for full credit:
1. A train travels 150 kilometers in 5 hours. How fast is it traveling?
Answers
Answer:
30 km/h
Explanation:
V=S:t
speed=length:time
150:5=30
For Part A, Sebastian decided to use the copper cylinder. How would the magnitude of his q and ∆H compare if he were to redo Part A but this time using an aluminum cylinder of equal mass? Assume that the initial temperatures of the metals (Tm) and the initial temperatures of the water (Ti) were the same. Specific heat of copper: 0.385 J/g*K Specific heat of aluminum: 0.900 J/g*K Group of answer choices The magnitudes of his q and ∆H for the copper trial would be higher than the aluminum trial. The magnitudes of his q and ∆H for both trials would be the same The magnitudes of his q and ∆H for the copper trial would be lower than the aluminum trial.
Answers
The magnitudes of his q and ∆H for the copper trial would be lower than the aluminum trial.
The given parameters;
initial temperature of metals, = [tex]T_m[/tex]initial temperature of water, = [tex]T_i[/tex] specific heat capacity of copper, [tex]C_p[/tex] = 0.385 J/g.Kspecific heat capacity of aluminum, [tex]C_A[/tex] = 0.9 J/g.Kboth metals have equal mass = mThe quantity of heat transferred by each metal is calculated as follows;
Q = mcΔt
For copper metal, the quantity of heat transferred is calculated as;
[tex]Q_p = (m_wc_w + m_pc_p)(T_m - T_i)\\\\Q_p = (T_m - T_i)(m_wc_w ) + (T_m - T_i)(m_pc_p)\\\\Q_p = (T_m - T_i)(m_wc_w ) + 0.385m_p(T_m - T_i)\\\\m_p = m\\\\Q_p = (T_m - T_i)(m_wc_w ) + 0.385m(T_m - T_i)\\\\let \ (T_m - T_i)(m_wc_w ) = Q_i, \ \ \ and \ let \ (T_m- T_i) = \Delta t\\\\Q_p = Q_i + 0.385m\Delta t[/tex]
The change in heat energy for copper metal;
[tex]\Delta H = Q_p - Q_i\\\\\Delta H = (Q_i + 0.385m \Delta t) - Q_i\\\\\Delta H = 0.385 m \Delta t[/tex]
For aluminum metal, the quantity of heat transferred is calculated as;
[tex]Q_A = (m_wc_w + m_Ac_A)(T_m - T_i)\\\\Q_A = (T_m -T_i)(m_wc_w) + (T_m -T_i) (m_Ac_A)\\\\let \ (T_m -T_i)(m_wc_w) = Q_i, \ and \ let (T_m - T_i) = \Delta t\\\\Q_A = Q_i \ + \ m_Ac_A\Delta t\\\\m_A = m\\\\Q_A = Q_i \ + \ 0.9m\Delta t[/tex]
The change in heat energy for aluminum metal ;
[tex]\Delta H = Q_A - Q_i\\\\\Delta H = (Q_i + 0.9m\Delta t) - Q_i\\\\\Delta H = 0.9m\Delta t[/tex]
Thus, we can conclude that the magnitudes of his q and ∆H for the copper trial would be lower than the aluminum trial.
Learn more here:https://brainly.com/question/15345295
Did the heliocentric model explain the drawbacks of the geocentric model?
Answers
Answer:
uuuugggghhhhhhhhggggffffffffffffff
Answer:
The geocentric model could not fully explain these changes in the appearance of the inferior planets (the planets between the Earth and the Sun). Furthermore, Galileo's observations of Jupiter's moons made it clear that celestial bodies do move about centers other than the Earth.
Mark me as the brainlist
A basketball player throws a ball horizontally toward another player 10 meters away. If the ball is
traveling at a speed of 20 m/s, neglecting air friction, how long does it take for the ball to get to the
other player?
Thank you!!!
Answers
Answer:
It will take 0.46 seconds to reach home plate by ball.
Explanation:
(Plzzzz help!!!) (50 points!!!)
1. Write the following quantities in scientific notation:
(1) 10130 Pa to 2 decimal places
(2) 978,15 m·s−2
to one decimal place
(3) 0,000001256 A to 3 decimal places
Answers
Answer:
YEAH THE PERSON ABOVE ME IS RIGHT MARK
THEM BRAINLIST
How do we measure the amplitude of a wave? (Plzz help my sister, 17 points!!!!)
1.crest to trough
2.crest to crest
3.trough to trough
4.crest to rest position
Answers
Answer:
U calculate from CREST to REST POSITION
In which scenario does Einstein's theory apply, but not Newton's?
comparing the gravitational forces between two systems
measuring how much energy light loses while it travels
calculating the speed of a satellite orbiting Earth
landing a spaceship on the moon
Answers
Answer:
B. Measuring how much energy light loses while it travels.
Explanation:
Got it right on edge.
Answer:
B
Explanation:
measuring how much energy light loses while it travels
Write a scientific explanation to describe where earthquakes and volcanoes most commonly occur and their relation to plate boundaries .
Answers
Một quả cầu khối lượng m được nối giữa hai đầu đoạn dây AB và CD như hình vẽ. Biết r
ằng, độ bền của hai đoạn dây AB và CD là như nhau. Nếu kéo đầu D của sợi dây bởi lực kéo có độ lớn tăng dần một cách từ từ thì
A. dây sẽ bị đứt đồng thời tại hai đoạn AB và CD.
B. đầu tiên dây sẽ bị đứt tại CD, sau đó đứt tại AB.
C. dây sẽ bị đứt tại phần CD.
D. dây sẽ bị đứt tại phần AB.
Answers
Answer:
B
Explanation:
B
which of the following is considered the "universal wave formula?"
1.T=1/f
2.v=fλ
3.λ=vf
4.f=vλ
Answers
Explanation:
2. v=fλ
HOPE IT HELPS YA_______________________
Which of these examples best illustrates Newton’s second law of motion
A a 100 lb boy has twice as much inertia as a 200 lb on boy.
B a truck need a more powerful engine then a small car.
C A hockey puck slides easily across the ice.
D A satellite stays in orbit for a long time.
Answers
Answer:
C )A hockey puck slides easily across the ice.
why a switch is connected in phase wire and never is neutral wire?
Answers
Answer:
ifyou have a wre connect you should not have to connected
i think that is the answer
Classify the following as reversible or irreversible changes a) ripening of mango b) evaporation of water c) melting of ice candy d) curdling of milk
Answers
c) melting of ice candy is an physical change
hope it helps
what is the negative of a vector
Answers
Answer:
A negative of a vector represents the direction opposite to the reference direction
Explanation:
It means that the magnitude of two vectors or same but they are opposite in direction . For example if A and B are two vectors that have equal magnitude but opposite in direction , then vector A is negative of vector B.
Which of the following choices is the most important to do before starting an exercise program?
A. see your doctor
B. talk to your friends for advice
C. lift some weights
D. measure your body fat
Please select the best answer from the choices provided.
O O O O
Answers
A simple pendulum is made of a small blob of mass m=7.000 kg attached to the end of an inextensible wire. The angular amplitude of oscillation is θ=5.730°. Consider that the gravitational acceleration is g=9.807 m/[tex]s^{2}[/tex]. What is the magnitude of the tension in the wire when the blob is directly below its point of support?
Answers
Answer:
The tension must be equal to the weight of the bob plus the centripetal force that is provided at eth end of the motion.
h = L (1 - cos theta) where h is the height to which the bob is raised
cos 5.730 = .995
h = .005 L
Also 1/2 m v^2 = m g h speed of the bob at the bottom
v^2 = 2 g h = .01 g L where 2 h = .01 L
v^2 / L = .01 g
m v^2 / L = .010 g m = .07 g since m = 7
Total tension = m g (1 + .07) = 1.07 m g
T = 9.807 * 1.07 * 7 = 73.45 kg m / s^2
A pyramid was built with approximately 2.3 million stone blocks, each weighing 2.4 tons (1 ton = 2,000 lbm). Find the mass of the pyramid in kg.
Answers
Total weight in tons
[tex]\\ \sf\longmapsto 2.3\times 10^6\times 2.4[/tex]
[tex]\\ \sf\longmapsto 5.52\times 10^6[/tex]
[tex]\\ \sf\longmapsto 5520000ton[/tex]
1ton=1000kg[tex]\\ \sf\longmapsto 5520000\times 1000[/tex]
[tex]\\ \sf\longmapsto 5520000000kg[/tex]
[tex]\\ \sf\longmapsto 5.52\times 10^9Kg[/tex]
What is defined as the isolation and reduction of variables in an experiment in order to understand the impact of a specific variable or variables on the outcome of the study?
Answers
aisnhsjdjxbxbxhxbxjx
Isolation and reduction of variables in an experiment is a way to reduce administrative efforts, costs and delusions occur.
What is an experiment?An experiment is a technique used to prove or disprove a theory, or to test the efficacy or probability of something that has never been done before.
Experiments reveal cause-and-effect relationships by illustrating what happens when a specific component is changed.
Experiments have a wide range of goals and scales, but they always rely on a repeatable technique and rational interpretation of the outcomes. Natural experimental research is also available.
If you can plan a control group, you will be much better off. It increases the expense of the experiment by a factor of two and may cause delusions.
Furthermore, it doubles the administrative effort. However, it provides the most reliable and straightforward method for calculating significance,
By comparison, taking into consideration the deviations of each of the two groups of data that arise.
In many circumstances, a control group is required for analysis when you wish to look at certain lag periods or increases in addition to the final result.
Hence isolation and reduction of variables in an experiment are much more important to reduce.
To learn more about the experiment refer to the link;
https://brainly.com/question/11256472
Together a car and its driver have a mass of 1234 kg. The car is slowed with an acceleration of -4.5 m/s2. What is the net force on the car?
Answers
Answer:
-5553N
Explanation:
Fnet = ma
Fnet = 1234kg * -4.5m/s^2
Fnet = -5553N
Which photon has more energy?
A. All photons have the same energy.
B. A photon of an infrared light
C. A photon of red light
D. A photon of micro wave.
Answers
a___of water a. of bread a. of soap a. of juice a. salt. a. sand a. of glass a. of corn fill in the blanks I follow him but right answer
Answers
Answer:
a glass of water. a loaf of bread. a bar of soap.a packet of juice. a pinch of salt.
Explanation:
that's all I know
Two objects are sitting 150 meters apart and are not moving. Which best explains why the gravitational force does not cause them to move?
Answers
In the above pic question is similar like that only
Answer:
The gravitational force between the two objects is weak because their masses are small
Marsha's car accelerates at an average rate of 3 m/s2. How long does it take for her car to speed up from 10 m/s to 15 m/s?
Answers
Explanation:
We are going to use the following equation:
[tex]v = v_0 + at \Rightarrow t = \dfrac{v - v_0}{a}[/tex]
[tex]t = \dfrac{15\:\text{m/s} - 10\:\text{m/s}}{3\:\text{m/s}^2}[/tex]
[tex]\:\:\:\:=1.67\:\text{s}[/tex]
Acellus
A car accelerates for 12.0
seconds at a rate of 1.20 m/s2. If
the final velocity is 30.0 m/s, what
was its starting velocity?
Answers
Answer:
Vi=15.6m/s
Explanation:
a=(Vf-Vi)/t
when we find Vi from the above formula
Vi = Vf - at
Vi=30m/s - 12sec×1.2m/s^2
Vi = 15.6m/s
Which of the following CANNOT be
picked with magnet?
A Safety pins
B
Coins
C Cork
D Needle
E Chain
Answers
Answer:
Well, there is a kind of magnet to pick up a coin.. I think you can pick up a needle with one too.. I think safety pins. depending on what its made of though.
Explanation:
Answer:
cork cannot be picked with a magnet
Explanation:
i hope that helps
Question 5 (10 points)
When a large amount of groundwater is extracted, what type of effects can occur
due to this large amount of water extraction? (*select all that apply)
Select 3 correct answer(s)
water table decrease
no change to water table
salt water intrusion
sinkholes
PLEASE HELP
Answers
Answer:
sink hole, water table decrease ,and salt water intrusion
Answer:
pls give brainliest
Explanation:
sink hole,water table descrese and salt water intrusion
What is the average velocity of a car that drives 50 meters to the left in 5 seconds?
Answers
Answer:
[tex]\boxed {\boxed {\sf 10 \ m/s \ left}}[/tex]
Explanation:
Velocity is the speed of something in a given direction. It is a vector quantity, so it has both magnitude and direction. Velocity is calculated by dividing the displacement by the time.
[tex]v= \frac{d}{t}[/tex]
The car drives 50 meters to the left in 5 seconds.
d= 50 m left t= 5 sSubstitute the values into the formula.
[tex]v= \frac{50 \ m \ left}{5 \ s}[/tex]
Divide.
[tex]v= 10 \ m/s \ left[/tex]
The average velocity of the car is 10 meters per second to the left.
The scientific method is
.linear or cyclic
Answers
the scientific method is described as self-correcting and cyclical therefore it ain't linear but cyclic.
Hope this helped you- have a good day bro cya)
a 1500 kg car accelerates at a rate of 40m/s what is the amount of force
Answers
Hi there!
Use the following equation: (Newton's Second Law)
∑F = ma, where:
∑F = net force (J)
m = mass (kg)
a = acceleration (m/s²)
Plug in the given values:
∑F = 1500 · 40 = 60,000 J
when a light ray enters the glass block it:
(a ) speeds up (b) slows down (c ) spreads out
Answers
Answer:
If a ray of light hits the surface of a sheet of glass, some light will be reflected by the surface of the glass. However, much of the light will pass through the glass, because glass is transparent. ... This 'bending of a ray of light' when it passes from one substance into another substance is called refraction.
Explanation: