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fgiga [73]
3 years ago
5

A motorcycle is moving with the velocity of 72km/h. If the velocity reaches 40m/s after 0.5m calculate the acceleration

Physics
1 answer:
julsineya [31]3 years ago
3 0

Answer:

1200m/s

Explanation:

initial velocity=72km/h=20m/s

Final velocity=40m/s

Distance=0.5m

Now,

2as=v^2-u^2

or,2*a*0.5=40^2-20^2

or,1a=1200

or,a=1200/1

therefore,acceleration=1200m/s

Plz mark me as brainliest:)

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A 200g of iron at 120 degrees and a 150 g piece of copper at -50 degrees are dropped into an insulated beaker containing 300 g o
kodGreya [7K]

Answer:

T = 15.03°C

Explanation:

given data:

copper specific heat = Sc = 0.385 J/g °C

iron specific iron = Si = 0.450 J/g °C

specific heat of ethanol = Se = 2.46 J/g °C

net heat loss is equal to zero

(m*S*\Delta T)_{copper} +(m*S*\Delta T)_ {iron} +(m*S*\Delta T)_ {ethanol} = 0

150*0.385 *( T - (-50)) + 200*0.450*(T - 120) + 300*2.46 * (T -20) = 0

57.75( T - (-50)) + 0.90(T - 120) +738(T -20) = 0

57.75T + 2887.5 + 0.90T - 108 + 738T - 14760 = 0

57.75T + 0.90T+738T = - 2887.5 + 108+14760

796.65T= 11980.5

T = 15.03°C

4 0
3 years ago
A 540 g model rocket is on a cart that is rolling to the right at a speed of 2.5 m/s. The rocket engine, when it is fired, exert
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Answer:

horizontal distance left of the loop should you launch is 7.1m

Explanation:

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4 0
3 years ago
How are electromagnetic waves produced? A) An accelerating electric point charge (electron) emits electromagnetic waves. B) A ba
shusha [124]
Hello,

Here is your answer:

The proper answer to this question will be option A "An accelerating electric point charge (electron) emits electromagnetic waves." That's because electromagnetic waves are formed by motion of electrically charged particles (electrons)!

Your answer is A!

If you need anymore help feel free to ask me!

Hope this helps!
8 0
3 years ago
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a car takes off from rest and covers a distance of 80m on a straight road in 10s.calculate the magnitude of its acceleration
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▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪

Here's the solution :

Let's find the final velocity :

  • \dfrac{displacement}{time}

  • \dfrac{80}{10}

  • 8 \:  \: ms {}^{ - 1}

Initial velocity (u) = 0 (cuz it started from rest)

Final velocity (v) = 8 m/s

Time taken (t) = 10 sec

now, we know that :

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  • \dfrac{8 - 0}{10}

  • \dfrac{8}{10}

  • 0.8 \:  \: m {s}^{ - 2}

Acceleration = 0.8 m/s²

7 0
3 years ago
1) Sketch (or scan or photocopy if you prefer) the plot below twice on your homework sheet. a) On one plot, draw the sum of the
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Answer:

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Explanation:

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