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MakcuM [25]
2 years ago
11

Study the free body diagram above. Which scenario below can best be described with this free body diagram? A. a cup is at rest o

n a table. B. a car coasts down a hill. C. a child drops a penny from the top of a building. Neglect air resistance. D. a bartender slides a glass of beer to a patron at the end of a bar. Neglect air resistance.

Physics
1 answer:
vekshin12 years ago
5 0

Answer: D

Explanation:

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Two balls of unequal mass are hung from two springs that are not identical. The springs stretch the same distance as the two sys
baherus [9]

Answer:

a. Springs oscillate with the same frequency

Explanation:

As they both are in the same height at equilibrium, so

weight of ball must be balanced with spring force, that is

k×x=mg

k= stiffness constant of spring

x=distance stretched

g= acceleration due to gravity

so,  we can write

k/m=g/x

as the g is a constant and they stretched to same distance x so the g/x term becomes constant and

f\propto\sqrt{k/m}

and k/m is same for both the springs so they will oscillate at the same frequency.

hence option a is correct.

3 0
2 years ago
Lucille is finding it difficult to play soccer after school. Her doctor thinks that her cells might not be getting enough oxygen
Bad White [126]

Explanation:

Lucile

Lucile cells needs a huge abundance of glucose and oxygen supply in order for her body to function properly and participate in a soccer game.

Playing a soccer game is energy demanding. The body's energy supply is met by the metabolism of glucose in cells using oxygen.

The problem with Lucille's respiratory and circulatory system can make it difficult for her to take part in soccer game because the needed energy would not be available for her to participate in the game.

  • Respiratory system is saddled with the responsibility of bringing enough oxygen to body system through gaseous exchange and metabolism.
  • The circulatory system carries the oxygen to the different body cells to where they are need. It also takes the deoxygenated blood to where they can get oxygenated.
  • We can clearly see that if respiratory and circulatory systems are not functioning well, Lucille's cells will not be able to furnish her with the much needed energy.

Ezra

Ezra needs energy to play basketball well. The energy is produced via the glucose in the starch and the oxygen from breathing.

When starch is broken down, glucose is produced.

How it works;

The digestive, circulatory and respiratory systems are all important here. They ensure that Ezra gets the needed energy from the food he is eating. Proteins also have the capability of producing energy when there is shortage of starch in the body.

Ezra's digestive system through a couple of processes releases glucose from the food he eats especially the bread in the sandwich.

The glucose is stored in the body and made available for use when in need.

The glucose is used to produce energy.

When Ezra breathes, the circulatory system ensures gaseous exchange with the surroundings. Oxygen rich blood is taken the cells where they combine with glucose for their metabolic actions. Oxygen deficient bloods are carried away.

In the cell, a special apparatus called the mitochondria combines glucose with oxygen and energy is liberated. The energy is used by Ezra to run while playing basketball

learn more:

Cellular respiration brainly.com/question/3447259

#learnwithBrainly

7 0
2 years ago
In the system shown above, the pulley is a uniform disk with a mass of .75 kg and a radius of 6.5 cm. The coefficient of frictio
lord [1]

Answer:

i am answering the same question 3rd time

please find the answer in the images attached.

5 0
1 year ago
At what distance above earth would a satellite have a period of 125 min?
Nezavi [6.7K]
Rw^2 = GmM/r^2 
<span> Leads to 
</span><span> w^2 r^3 = GM 
</span><span> (2pi /T) ^2 r^3 = GM 
</span><span> 4pi^2 r^3 = GM T^2 
</span><span> r^3 = GM T^2 / 4pi^2 
</span><span> Work out r^3 then r. 
</span> T = 125 min = 125(60) = 7500 s 
<span> R = 6.38E6 m 
</span><span> m = 5.97E24 kg 
</span><span> G = 6.673E-11 
</span> r=<span> 8279791.78</span><span> m
 Since r = radius R of Earth + height above urface,h 
</span><span> h = r - R = </span><span> 8279791.78 - </span>6.38E6 = <span> <span>1899791.78 m
 h=</span></span><span> <span>1899.79178 Km</span></span>
5 0
2 years ago
Read 2 more answers
. Suppose you have a device that extracts energy from ocean breakers in direct proportion to their intensity. If the device prod
slava [35]

Answer:

4.988kW

Explanation:

According to the question, energy E extracted from the ocean breaker is directly proportional to the intensity I. It can be expressed mathematically as E ∝ I

E = kI where k is the constant of proportionality.

From the formula; k = E/I

This shows that increase in energy extracted will lead to increase in its intensity and vice versa.

If the device produces 10.0 kW of power on a day when the breakers are 1.20 m high

E = 10kW and I = 1.20m

k = 10/1.20

k = 8.33kW/m

To know how much energy E that will be produced when they are 0.600 m high, we will use the same formula

k = E/I where;

k = 8.33kW/m

I = 0.600m

E = kI

E = 8.33 × 0.6

E = 4.998kW

The device will produce energy of 4.998kW when they are 0.600m high.

3 0
2 years ago
Read 2 more answers
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