All categories

3 years ago

When does a substance releases heat?? (it's about changing state of matter)

1 answer:

3 0

Heat is released when a substance changes from a gas to a liquid, or from a liquid to a solid.

When a liquid changes to a solid, we refer to that as the process of 'freezing'.

You might be interested in

Frank has just completed a study in which he gave a survey to each of 7,000 employees and their supervisors in a large bank. His

vovikov84 [41]

Answer:

The declaration is mostly accurate or correct.

Explanation:

Task success can be induced by work satisfaction. But that could also be accurate the opposite way round, i.e. work success affects employee satisfaction.
The inference reached here does not specify which incident seems to be the reason and which one is the trigger's consequence. A significant direct connection between the two can not be identified. Other than that, there could be other variables that may control the two variables.

8 0

4 years ago

you invest $1300 in an account at interest rate r, compounded continuously. Find the time required for the amount to double and

miskamm [114]

Answer:

1. For the amount to double: 9.37 years

2. For the amount to triple: 14.85 years

Explanation:

The equation for continuosly compounded interest is:

$F=P\times e^{rt}$

Where:

P is the amount that you invest today: $1,300
F is the value after t years: the double or triple of $1,300
r is the annual interest rate: 0.074

1. For the amount to double:

Substitute the values and solve for t:

$2\times \$1,300=\$1,300\times e^{0.074t}\\ \\ 0.074t=\ln 2\\ \\ t=\ln 2/0.074=9.37years$

2. For the amount to triple:

$3\times \$1,300=\$1,300\times e^{0.074t}\\ \\ 0.074t=\ln 3\\ \\ t=\ln 3/0.074=14.85years$

4 0

3 years ago

In the actual economy, goods and services are purchased byA. households, but not firms or the government. B. households and the

GenaCL600 [577]

Answer:

C. households, firms, and the government.

Explanation:

In the actual economy, goods and services are purchased by households, firms, and the government.

7 0

3 years ago

A firm has the following gross requirements for Item OF. Ordering costs are $60 per order and carrying costs are $0.50 per perio

aleksley [76]

Answer:

c. 120

Explanation:

The economic order quantity is the minimum amount of inventory that a seller must keep to demand and lower the holding cost. The formula for Economic order quantity is represented by the formula:

EOQ = $\sqrt{\frac{2*Demand*Ordering Cost}{Holding cost} }$

EOQ = $\sqrt{\frac{2*240*60}{0.5} }$

EOQ = 120

5 0

3 years ago

Barrington Bears has developed the following sales forecasts for the next few months. January 500, February 600, March 720, Apri

Oduvanchick [21]

Answer:

The correct answer is C.

Explanation:

Giving the following information:

Barrington Bears has developed the following sales forecasts for January 500 units.

BB has 80 bears on hand on Dec. 31. The normal ending inventory policy is to hold 20% of next month’s sales.

Direct labor is paid $18 per hour. Each bear takes 40 minutes to hand-finish. Variable overheads total $21 per direct labor hour. Fixed overheads amount to $25,000 per month.

First, we need to calculate the production for January.

Sales= 500 units

Ending inventory= (600*0.2)= 120 units

Beginning inventory= 80 (-)

Total= 540 units

Conversion costs= direct labor + manufacturing overhead

Direct labor= [(40/60)*540]*$18= $6,480

Variable overhead= 21*360 hours= $7,560

Fixed overhead= $25,000

Total conversion costs= $39,040

5 0

3 years ago