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Svetradugi [14.3K]
3 years ago
7

A portable television using a 12 volt, 3 Ah rechargeable battery can operate for a period of about 6 hours. What is the average

current drawn in amperes during this period
Physics
1 answer:
bezimeni [28]3 years ago
7 0

Answer:

0.5 A

Explanation:

Current: This is defined as the rate flow of electric charge round a circuit,

The S.I unit of current is Ampere (A). Mathematically,

Current (I) = C/t

I = C/t................  Equation 1

Where  C = capacity of the battery, t = time

Given: C= 3 Ah, t = 6 hours.

Substitute into equation 1

I = 3/6

I = 1/2

I = 0.5 A.

Hence the average current drawn = 0.5 A

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A mass weighting 16 lbs stretches a spring 3 inches. The mass is in a medium that exerts a viscous resistance of 20 lbs when the
const2013 [10]

Answer:

The equation for the object's displacement is u(t)=0.583cos11.35t

Explanation:

Given:

m = 16 lb

δ = 3 in

The stiffness is:

k=\frac{m}{\delta } =\frac{16}{3} =5.33lb/in

The angular speed is:

w=\sqrt{\frac{k}{m} } =\sqrt{\frac{5.33*386.4}{16} } =11.35rad/s

The damping force is:

F_{D} =cu

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FD = 20 lb

u = 4 ft/s = 48 in/s

Replacing:

c=\frac{F_{D} }{u} =\frac{20}{48} =0.42lbs/in

The critical damping is equal:

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Like cc>c the system is undamped

The equilibrium expression is:

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