A ball with a mass of 1.5 kilograms is tied to the end of a rope. The ball is pulled to a height of 0.5 meters above the ground and released.The ball has joules of potential energy at position B. At position A, all of the energy changes to kinetic energy. The velocity of the ball at position A is meters/second. Assume there’s no air resistance. Use g = 9.8 m/s2 , PE = m × g × h, and
Answers
Solve the potential energy at point B
PE = mgh
Where m is the mass
G is the acceleration due to gravity 9.8 m/s2
H is the height
PE = ( 1.5 kg) ( 9.8 m/s2) (0.5 m)
PE = 7.35 J
Solve the velocity using the
KE = 0.5mv^2
Where ke is the kinetic energy
M is the mass
V is the velocity
Since all energy is converted to KE
So KE = PE
7.35 = 0.53(1.5) v^2
V = 3.13 m/s
The velocity of the ball at position A is equal to 3.13 m/s.
Given the following data:
- Mass of ball = 1.5 kilograms.
- Height = 0.5 meters.
- Acceleration due to gravity = 9.8
How to calculate potential energy.
Mathematically, potential energy is given by this formula:
Where:
- m is the mass.
- h is the height.
- g is acceleration due to gravity.
Substituting the given parameters into the formula, we have;
P.E = 7.35 Joules.
Assuming there’s no air resistance, the potential energy would be equal to kinetic energy.
V = 3.13 m/s.
Read more on potential energy here: brainly.com/question/1242059
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Summarize it!
c The
Time Elapsed: 45
D
-0.5 m
10 m
15 m
20 m
0.5 m
I. 0.5 m
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Answer:
cbccfggssdaffzftyrd
Answers
Answer:c
Explanation:
Given
Alice launches with horizontal velocity
Tom simply drops straight down from the edge
Time taken by both the person is same as they have same initial vertical velocity i.e. zero so the time taken to reach the ground is zero.
Although Alice will travel more horizontal distance compared to Tom.
Thus option c is correct
Answers
But before we can do the multiplication, all three dimensions
have to be in the same unit.
The question is asking for the answer in cubic feet, and one of
the dimensions is already in feet. So let's change the other two
dimensions to feet.
Length:
1 meter = 3.28 feet
634 meters = (634 x 3.28) feet
Width:
1 yard = 3 feet
710 yards = (710 x 3) feet
Height:
109 feet
Volume = (length) x (width) x (height)
= (634 x 3.28 ft) x (710 x 3 ft) x (109 ft)
= 48,292,580 cubic feet .
Is my answer right?? Plzz help
Answers
Example with numbers:
When you multiply (1/9) by 2, you get 2/9 .
With units:
When you multiply (m/s) by (kg), you get (kg-m/s).
29 million people in the U.S.
Horsepower= 746 W
The above is the info you will need. This is what I have done so far, but it can NOT be right:
98.3*10^15Btu/year(1 year/365 days) = 0.269315*10^15 Btu/day (0.269315*10^15Btu/day)/291 million = (0.2693*10^15 Btu/day)/291*10^6 ~0.00092548109*10^5 Btu/day = 925,481.09Btu/day
925,481.09Btu/day*(1day/24hour) = 38561.71 Btu/hour ~ 38561.7Btu/hour
1horsepower = 746 W
1 W = 3.412Btu/hr38561.7Btu/hr*(1 W/3.412 Btu/hr) ~ 11301.3 W*(1 hp/746 W) = 15.149 hp
Answers
The more I have worked on this, the stranger it has become.
First ... I didn't know what 'QBTU' means. But I see that you called it
' 10¹⁵ ' so I guess it's 'quadrillion'.
Next ... your given data says 29 million people in the US, and that's
ridiculous. Right now it's about 319 million. It was 290 million in 2002,
and I see that you used 291 million, so that looks like it was a typo.
No problem.
Now . . . I did it 3 or 4 times using that 3.412 BTU/hr = 1 watt . I did get
the significant figures of 152, but I kept getting either 152 HP or 0.152 HP.
At this point, I traced through your solution ... thank you very much for
posting it ... and I'm going to take your colossal load of points for saying
that I I did go through every step in detail, I agree 100% with everything
I see there, and I endorse every move you made.
So up to now, we both agree that we cannot see where 1.5 HP/person
comes from.
I looked back to the conversion factors, and I saw something that could
make the arithmetic less complex: 1 BTU = 1,055 Joules
Look what I can do with that:
(98.3 x 10¹⁵ BTU/yr) x (1,055 joule/BTU) x
(yr/365 day) x (day/86,400sec) x
(HP/746 joule-sec) = 4.4082 x 10⁹ HP
then . . .
(4.4082 x 10⁹ HP) / (29.1 x 10⁷ people) = 15.15 HP/person
I'd say that your work, using the given data, has been vindicated by
an outside, independent consultant. It may not be a true statistic, but
your math is bullet-proof, and the data have been properly implemented.
B) increases; increases
C) decreases; increases
D) decreases; decreases
Answers
Answer;
C) decreases; increases
Explanation;
- As we move through the visible spectrum, red to violet (right to left in the image), the wavelength decreases and the frequency increases.
- Electromagnetic spectrum comprises of electromagnetic waves arranged in the order of increasing or decreasing frequency and wavelength.
- These electromagnetic waves includes; radio waves, microwaves, infrared, visible light, ultraviolet, x-rays and gamma rays.
- In electromagnetic spectrum as you move from left to right, that is from the radio waves towards the gamma rays, the wavelength decreases as the frequency increases; while from gamma rays towards the radio waves the wavelength increases while the frequency decreases.