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12345 [234]
3 years ago
12

A metal alloy bolt is initially at 100.0°C. It is dropped into a coffee cup calorimeter containing 50.0 g of water at a temperat

ure of 20.0°C. After stirring, the final temperature of both bolt and water is 25.0°C. Assuming no heat losses, and that the specific heat (capacity) of water is 4.18 J/(g ∙ K), what is the heat capacity of the bolt in J/K?
Business
1 answer:
Ad libitum [116K]3 years ago
4 0

Answer:

the heat capacity of the bolt is 13.9 J/K

Explanation:

J/K is short of " joule per kelvin", is the international system unit of heat capacity

heat energy = (mass of substance)(specific heat)(change in temperature)

Q = mc∆T

Q = heat energy (Joules, J)

m = mass of a substance (kg)

c = specific heat (units J/kg∙K)

∆ is a symbol meaning "the change in"

∆T = change in temperature (Kelvins, K)

Heat gained by water = heat lost by copper  = Q = mC∆T = (50 g)(4.18 J/g/deg)(5 deg) = 1045 J   = C x ∆T

C = 1045 J/75 = 13.9 J/deg

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Stewart wants to invest some money that he just inherited. He found that his bank offers a savings account paying a guaranteed 3
Likurg_2 [28]

Answer:

Stewart will probably have to accept a higher level of risk .

Explanation:

Hence, a large-risk investment is one in which the risks of failure, or of losing some or all of the asset, are greater than the average.

  • These opportunities often offer investors the ability for greater returns in exchange for embracing the degree of risk associated with that.
  • In saving account he gets 3% rate of return but also gets a lower rate of risk and does not earn much.

If he invests his money in higher-risk fields like shares, he may get a higher profit.

3 0
3 years ago
Ellen, a manager at a marketing firm, noticed that one of her subordinates, who is usually good-natured, has been moody, irritab
ASHA 777 [7]

Answer:

b. burnout

Explanation:

-Depression  is an illness that makes people feel sad and without interest in performing activities that they used to do.

-Burnout  is when a person is really tired because of a lot of stress and the person feels exhausted, overwhelmed, unmotivated and with a negative attitude.

-Insomnia  is when a person has a problem to fall sleep and people feel that they are not able to rest.

-Occupational disease is an illness that is caused by the conditions in your job.

According to this, the answer is that such symptoms are most likely an indication that the subordinate is experiencing burnout because it appears when a person has a lot of stress which results in being in a bad mood, unmotivated and the person neglects the job.

6 0
3 years ago
Mullineaux Corporation has a target capital structure of 64 percent common stock, 9 percent preferred stock, and 27 percent debt
nlexa [21]

Answer:

10.02%

Explanation:

The computation of the WACC is shown below. The formula of WACC is shown below:

= (Weightage of debt × cost of debt)  + (Weightage of preferred stock) × (cost of preferred stock) + (Weightage of  common stock) × (cost of common stock)

= 27% × 7.6% × (1 - 0.40) + 9% × 5.9% + 64% × 12.9%

= 2.052% × (1 - 0.40) + 0.531% + 8.256%

= 10.02%

8 0
3 years ago
Which of the following are ways to develop a better social network:
Alex

Answer:

The ways to develop a better social network is to:

C. Maximize homophily

D. Invest in relationships that extend your expertise

E. Develop connections with powerful others

Explanation:

Maximizing homophily refers to the tendency to have positive ties with individuals who are similar in socially significant ways. Engaging regularly or hanging out with your kind is a good way to develop better social network.

Investing in relationships that extends your expertise is a proactive way of breaking new grounds and connecting with people that are ahead of you in a cordial manner. More like a mentor-mentee approach.

Developing connections with powerful others opens up the gate to the elite social community which will deepen your social network.

7 0
3 years ago
The manufacturing overhead budget at Polich Corporation is based on budgeted direct labor-hours. The direct labor budget indicat
just olya [345]

Answer:

Predetermined manufacturing overhead rate= $22.2 per direct labor hour

Explanation:

Giving the following information:

Fixed manufacturing overhead= $127,840 per month

Estimated direct labor hours= 9,400

The variable overhead rate is $8.60 per direct labor hour

<u>To calculate the predetermined manufacturing overhead rate we need to use the following formula:</u>

Predetermined manufacturing overhead rate= total estimated overhead costs for the period/ total amount of allocation base

Predetermined manufacturing overhead rate= (127,840 / 9,400) + 8.6

Predetermined manufacturing overhead rate= $22.2 per direct labor hour

7 0
3 years ago
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