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PilotLPTM [1.2K]
4 years ago
6

A current of 5.0 a flows through an electrical device for 10 seconds. how many electrons flow through this device during this ti

me?
Physics
1 answer:
melisa1 [442]4 years ago
4 0
1 Amp = 1 Coulomb/sec
1 Coulomb/sec = 6.25*10^18 electrons/sec

Therefore,
5.0 A = 5 C/s = 5*6.25*10^18 = 3.125*10^19 e/s

In 10 second, number of electrons are calculated as;
Number of electrons through the device = 3.125*10^19*10 = 3.125*10^20 electrons

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Air resistance allow objects to develop full acceleration due to gravity true or false
Aloiza [94]
False. because the object cannot freefall due to resistance, so it cannot develop full acceleration.
3 0
3 years ago
1. a) Name 2 properties of waves that change if the wave changes media.
Drupady [299]
1.) The properties of a wave are the following.
a) <span><span>Amplitude - the height of the wave, measured in meters.
</span><span>b) Wavelength - the distance between adjacent crests, measured in meters.
</span><span>c) Period - the time it takes for one complete wave to pass a given point, measured in seconds.
</span><span>d) Frequency - the number of complete waves that pass a point in one second, measured in inverse seconds, or Hertz (Hz).
</span><span>e) Speed - the horizontal speed of a point on a wave as it propagates, measured in meters / second.

Among these properties, PERIOD and SPEED changes if the wave changes media. The others remain the same.

2. Speed = Wavelength * Frequency
    Wavelength and Frequency are independent from each other. But you can use the given formula and assume values to check the reaction of one from another.

3. Energy of a wave is based on its amplitude. High amplitude means high energy and vice versa. To increase the energy of a wave, the amplitude must be increased. Another way of increasing the energy of a wave is using elastic medium. </span></span>
3 0
3 years ago
Anne applies a force on a toy car and makes it move forward. What can be said about the forces acting on the toy car at the mome
tester [92]

The correct answer to the question is unbalanced .

EXPLANATION:

As per Newton's first laws of motion, we know that a body at rest will be at rest or a body moving with uniform velocity along a straight line will keep on moving with the same velocity along that line unless and until it is compelled by some external unbalanced forces acting on.

Hence, it is the unbalanced force which is responsible for creating the motion on the body.

As per the question, Anne applied some force on the toy car. It is called applied force. There is also frictional force between car and the surface which opposes the motion of the car. The toy car will move due to the net force acting on it. The net force is known as unbalanced force.

5 0
4 years ago
Read 2 more answers
Pikes peak is a mountain in colorado. its height is 4301 m above sea level. what is its altitude in kilometers
valina [46]
Height and altitude have the same meaning.

Because 1 km = 10³ m, the altitude is
(4301 m)*(10⁻³ km/m) = 4.301 km

Answer: 4.301 km
7 0
4 years ago
A 2.16 x 10-2-kg block is resting on a horizontal frictionless surface and is attached to a horizontal spring whose spring const
pochemuha

Answer:

0.15694 m

Explanation:

m = Mass of block = 2.16\times 10^{-2}\ kg

v = Velocity of block = 11.2 m/s

k = Spring constant = 110 N/m

Here the kinetic energy of the fall and spring are conserved

\frac{1}{2}mv^2=\frac{1}{2}kA^2\\\Rightarrow mv^2=kA^2\\\Rightarrow A=\sqrt{\frac{mv^2}{k}}\\\Rightarrow A=\sqrt{\frac{2.16\times 10^{-2}\times 11.2^2}{110}}\\\Rightarrow A=0.15694\ m

The amplitude of the resulting simple harmonic motion is 0.15694 m

3 0
4 years ago
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