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Elza [17]
3 years ago
12

a cell phone uses 3.0V battery. the circuit board needs a 0.05 A current. what size resistor is needed to generate this current

Physics
1 answer:
san4es73 [151]3 years ago
7 0

Answer:

60 Ohms

Explanation:

Ohms law states that the voltage in the circuit is directly proportional to the current through the circuit components and expressed as

V=IR

Where V is the voltage, I is current and R is resistance

Making R the subject of the formula then

R=\frac {V}{I}

Substituting 3.0V for V and 0.05 A for I then

R=\frac {3}{0.05}=60.0

Therefore, resistance is 60.0 Ohms

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If we keep on applying force on a material object, can it gain speed of light?
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A sinusoidal, transverse wave that propagates in the positive x-direction can be described with the wave function y of xt is equ
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Answer:

\omega =\frac{2 \pi }{T} rad/s

Explanation:

The wave function is:

y(xt) = Acos(kx- \omega t)

where :

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2 years ago
Calculate how much force is required to give a 0.15-kg baseball an acceleration of 12m/s2
Nutka1998 [239]

<u>F = M A </u> (Newton's #2)

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Force = (0.15 · 12) (kg·m/s²)

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6 0
3 years ago
two soccer players run toward each other. one player has a mass of 85 kg and runs west with a speed of 8 m/s, while the other ha
marissa [1.9K]

Answer:

Total momentum, p = 55 kg-m/s

Explanation:

It is given that,

Mass of player 1, m₁ = 85 kg

Mass of player 2, m₂ = 105 kg

Speed of player 1, v₁ = -8 m/s (west)

Speed of player 2, v₂ = 7 m/s (east)

Momentum is equal to the product of mass and velocity. For this system, momentum is given by :

p=m_1v_1+m_2v_2

p=85\ kg\times (-8\ m/s)+105\ kg\times 7\ m/s

p = 55 kg-m/s

The total momentum of the system made up of the two players is 55 kg-m/s.

8 0
2 years ago
Read 2 more answers
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