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Svetach [21]
3 years ago
14

1- friction force increases the object speed as it acts in the same direction O True O false

Physics
1 answer:
OLEGan [10]3 years ago
5 0

Answer:

False

Explanation:

Friction force is a force that opposes the relative lateral motion of two solid surfaces in contact.

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if Xc = 7,500 and the resistance is 10,000 in a series RC circuit , what is the impedance of the circuit?
mr_godi [17]

Answer:

The impedance of the circuit = 12500 Ω

Explanation:

<em>Impedance:</em> This is the overall opposition to the flow of current in an a.c circuit by any two or all of the three circuit elements.(R, L, C) is called <em>impedance.</em>

<em>The  S.I unit of Impedance is Ohms. (Ω), It can be represented mathematically as</em>

Z = √(Xc² + R²).................... Equation 1

Where Z = impedance, Xc = reactance of the capacitor, R = resistance of the  resistor.

<em>Given: Xc = 7500 Ω, R = 10000 Ω</em>

<em>Substituting these values into equation 1,</em>

<em>Z = √(7500² + 10000²)</em>

<em>Z = √(56250000 + 100000000)</em>

<em>Z = √(156250000)</em>

Z =12500 Ω

Therefore, The impedance of the circuit = 12500 Ω

3 0
3 years ago
Read 2 more answers
A photograph of you and your friends at your 8th birthday party.is it secondary or primary source and why?
Reptile [31]

Answer:

primary source

Explanation:

the explanation is in the image above

brainliest please

7 0
3 years ago
This gradual change in beak size over time is known as _______.
yan [13]
The correct answer is evolution
4 0
4 years ago
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A ball is thrown into the air with 100 J of kinetic energy, which is transformed to gravitational potential energy
goblinko [34]

Answer:

Air resistance

Explanation:

Despite the law of conservation of energy stating that energy can neither be created nor destroyed but can only be transformed from one state to another, some energy is usually lost in the process of transformation and its majorly attributed to frictional loss. Friction opposes normal movement hence in air, air resistance tends to reduce the original energy compared to the initial. That is why the final energy in this case is slightly less than the original energy.

3 0
4 years ago
Need help as fast as possible please<br> Thank you!
alekssr [168]

Answer:

b is the answer.. hope it helps

5 0
3 years ago
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