What is the kinetic energy of a 1.40 kg discus with a speed of 22.5 m/s?
Answers
The kinetic energy of a 1.40 kg discus with a speed of 22.5 m/s is 354.375 joule.
What is kinetic energy?
The energy that an object has because it is moving is known as kinetic energy in physics. It is described as the amount of effort required to accelerate a body of a specific mass from rest to its specified velocity. The body keeps its kinetic energy after gaining it during acceleration, barring changes in speed.
Up until a change in speed, the body maintains the kinetic energy it gained during acceleration.
Mass of the discus: M = 1.40 kg.
Speed of the discus: v = 22.5 m/s.
Hence, the kinetic energy of the discus= 1/2×Mv²
= 1/2 × 1.40 × 22.5² joule
= 354.375 joule.
Hence, the kinetic energy of a 1.40 kg discus with a speed of 22.5 m/s is 354.375 joule.
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The orbits of planets being elliptical was one the planetary laws developed by
True or False
Answers
Answer:
True
Explanation:
The object is at rest, which means it's not moving, so there is no net force on it, according to Newton's First Law.
Answers
345=5v
v=345/5=69m/s
27%
20%
15%
Answers
Answer:
The percentage of its mechanical energy does the ball lose with each bounce is 23 %
Explanation:
Given data,
The tennis ball is released from the height, h = 4 m
After the third bounce it reaches height, h' = 183 cm
= 1.83 m
The total mechanical energy of the ball is equal to its maximum P.E
E = mgh
= 4 mg
At height h', the P.E becomes
E' = mgh'
= 1.83 mg
The percentage of change in energy the ball retains to its original energy,
ΔE % = 45 %
The ball retains only the 45% of its original energy after 3 bounces.
Therefore, the energy retains in each bounce is
∛ (0.45) = 0.77
The ball retains only the 77% of its original energy.
The energy lost to the floor is,
E = 100 - 77
= 23 %
Hence, the percentage of its mechanical energy does the ball lose with each bounce is 23 %
Answer: 23
Explanation: gradpoint
Answers
Answer:
6. 2017 Ω, about 2000 Ω.
7. no current is induced unless the field is changing
Explanation:
6. The relationship between power, voltage, and resistance is ...
P = V²/R
Rearranging gives
R = V²/P = (220 volt)²/(24 watts) ≈ 2016.667 Ω
The closest answer choice is 2000 Ω.
___
7.No current is induced in a stationary loop in a time-invariant magnetic field.
If something were changing, the direction of current induced would depend on whether the field is increasing or decreasing, and/or whether the loop is expanding or contracting.
Final answer:
The equivalent resistance of the input circuit is approximately 2028.33 ohms.
Explanation:
In this question, we are given the power input and the voltage input of a transformer, and we are asked to find the equivalent resistance of the input circuit. To find the equivalent resistance, we can use the formula:
Resistance = Voltage2 / Power
Using the given values of voltage (220 V) and power (24 W), we can substitute these values into the formula to find the equivalent resistance:
Resistance = (2202) / 24 = 2028.33 ohms
Therefore, the equivalent resistance of the input circuit is approximately 2028.33 ohms.
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Answers
Answer:
This is a Upside down Glass of Water Experiment
Explanation:
Explanation:
if I interpret the graphic correctly, then there is a basin fully filled with water on the left, then a piece of paper of a piece of glass, where the paper is in contract with the water on the left, and some water is delivered to the right.
then i suspect this shows the capillary effect of very narrow channels of water. like in the very tiny spaces between the fibers of the paper. as long as the paper is in contact with the water on the left, and the level of water is there higher than on the right, the surface tension of water kind of propels itself further along these narrow channels in the paper and supported by gravity and air pressure it drops even into the other side.
Answers
-- Unless I miss my guess, the phrase "In two to four paragraphs,
explain ..." sounds like you want somebody to write a nice essay
for you, which you will then write your name at the top of and hand
it in as your own work. Are you sure you want to adopt this process
as a substitute for actually learning stuff ?
-- Sadly, you can probably forget about offering 5 points and getting
two to four paragraphs in return.
-- Another hunch of mine: You're referring to the "Young Person's
Guide to the Orchestra" ... a fugue and variations based on the
Rondeau from Henry Purcell's incidental music to Aphra Behm's
Abdelazar, composed by Benjamin Britten in 1946 for elementary
music education. The subject may not be too familiar to the people
who like to hang out here in the <Physics> category. You might
stand a better chance if you post the question again in <Arts> or
even <Social Studies>. I don't know of a way to 'move' a question
on Brainly, so you'll have to actually post it again ... and this time,
see if you can spare a few more points for an answer.
Answer:
Britten used a variety of instruments from different families and changed the traditional order. He started with the woodwinds, then strings, then brass, and percussion. He started with the highest pitched instruments in each of the families. This made the differences in the timbers of different sections of the orchestra more clear.
but he is right add more points next time you ask someone to do your work for you
Explanation: