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MAVERICK [17]
2 years ago
12

A 6V radio with a current of 2A is turned on for 5 minutes. Calculate the energy transferred in joules

Physics
1 answer:
iogann1982 [59]2 years ago
7 0

Answer:

R=V/I=6/2=3ohm

time =5minutes =5*60=300seconds

I=2A

Heat =I^2Rt=(2)^2*3*300=4*900=3600J

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A cyclist starts at rest and accelerates at 0.5 m/s2 south for 20 s. What is the cyclist’s final velocity
inn [45]

The cyclist's final velocity is 10 m/s.

From the question,

We are to determine the cyclist's final velocity.

<h3>Linear motion</h3>

From one of the equations of motion for linear motion, we have

v=u+at

Where

v is the final velocity

u is the initial velocity

a is the acceleration

and t is the time

From the given information,

The cyclist starts at rest, this means the initial velocity is 0 m/s

That is,

u = 0 m/s

Also

a = 0.5 m/s²

and t = 20 s

Putting the parameters into the equation, we get

v = 0 + 0.5 \times 20

v = 0 + 10

v = 10 \ m/s

Hence, the cyclist's final velocity is 10 m/s.

Learn more on linear motion here: brainly.com/question/19365526

8 0
2 years ago
what are valence shell electrons?a. electrons thata re unchargedb. electrons that are positively chargedc. electrons that are av
goblinko [34]
Your answer is c. electrons that are available for bonding.
6 0
3 years ago
Cela est it possible ?
Ede4ka [16]
I’m sorry can’t helpless
8 0
3 years ago
a 2.0 kg ball is dropped from a height of 20 m onto a soft surface and rebounds to a height of 5.0 m . what is the magnitude of
Yuki888 [10]

Based on the data provided, the impulse of the floor on the ball is 59.4 Ns.

<h3>What is the impulse of the floor on the ball?</h3>

Using the equation of motion to determine the velocity at the end of the fall

  • v^2 = u^2 + 2gh

Where v is velocity at the end of fall

u is initial velocity = 0

g is acceleration due to gravity = 9.81 m/s^2

h is height = 20

  • Taking downward velocity as negative and up as positive

v^2 = 0 + 2 (9.81)(20)

v^2 = 392.4

v = - 19.8 m/s

The velocity, v after bouncing is calculated also:

u = 0

g = 9.81 m/s^2

h = 5.0 m

v^2 = 0 + 2(9.81)(5)

v^2 = 98.1

v = 9.904 m/s

  • Impulse = change in momentum
  • Impulse = m(v- u)

Impulse = 2.0 × (9.9 -(-19.8)

Impulse = 59.4 Ns

Therefore, the impulse of the floor on the ball is 59.4 Ns.

Learn more about impulse at: brainly.com/question/904448

5 0
2 years ago
Which object has the most momentum if they were all traveling 50 mph? a) A bicycle
SCORPION-xisa [38]

Train has the most momentum if they were all traveling 50 mph

<u>Explanation:</u>

  • A train can have the most momentum even if it is moving slowly because it has a large mass if they were all traveling 50 mph.
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  • <u>Momentum= mass x velocity</u>

<u></u>

<u></u>

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6 0
3 years ago
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