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Andru [333]
2 years ago
8

A partially inflated balloon is faded over the open end of a glass beaker that contains water the beaker is placed in an ice bat

h which cause the water and causes the balloon to the flea what are the correct designs for the heat and work changes to the beaker and balloon system

Physics
1 answer:
grin007 [14]2 years ago
7 0

Answer:

a

Explanation:

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The third one sliding friction
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2 years ago
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

Where

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:

c_{c} =\frac{2k}{w} =\frac{2*5.33}{11.35} =0.94lbs/in

Like cc>c the system is undamped

The equilibrium expression is:

u(t)=u(o)coswt+u'(o)sinwt\\u(o)=7=0.583\\u'(o)=0\\u(t)=0.583coswt\\u(t)=0.583cos11.35t

3 0
3 years ago
23. If a jogger runs 100 meters west and then turns around and runs 30 meters east. What
marshall27 [118]

Answer:

A

Explanation:

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7 0
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Read 2 more answers
How many electrons are in 204 C of charge?
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Answer:

The mass number 204 – 82 protons = 122 neutrons

Explanation:

Hope this helps!

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