subject

Physics, 11.10.2019 06:30 cheergirlkr4746

The reason we have periods of darkness that we call night is because

ansver

Answers: 1

Show answers

Another question on Physics

question

Physics, 22.06.2019 04:30

Afeather of mass 0.001 kg falls from a height of 2 m. under realistic conditions, it experiences air resistance. based on what you know about friction, what can you say about the kinetic energy of the feather as it reaches the ground? acceleration due to gravity is g = 9.8 m/s2. a. ke < 0.0196 j b. ke = 00196 j c. je = 0 j d. ke > 0.0196 j

Answers: 1

question

Physics, 22.06.2019 10:30

An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.

Answers: 2

question

Physics, 22.06.2019 12:50

Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.

Answers: 2

question

Physics, 22.06.2019 16:50

Acommercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35°c by rejecting waste heat to cooling water that enters the condenser at 18°c at a rate of 0.25 kg/s and leaves at 26°c. the refrigerant enters the condenser at 1.2 mpa and 50°c. if the compressor consumes 3.3 kw of power, determine (a) the mass flow rate of the refrigerant, (b) the refrigeration load, (c) the cop, and (d) the minimum power input to the compressor for the same refrigeration load.

Answers: 2

You know the right answer?

The reason we have periods of darkness that we call night is because...

Questions

question

Mathematics, 07.03.2020 05:16

There are 73 students in the eighth grade class at Garfield MiddleSchool. Eleven do not participate in after-school activities. Of therema...

question

Mathematics, 07.03.2020 05:16

What is the measure of each interior angle of a regular octagon? A. 45° B. 60° C. 120° D. 135...

question

Mathematics, 07.03.2020 05:16

Which statements about the graph of the function f(x) = -x2 - 4x + 2 are true? Select three options, The domain is (XIXS-2) The range is y...

question

Mathematics, 07.03.2020 05:16

Using the cross multiplication method, which of the following is the solution to 7/(x+1) = 5/(x-1)? 6 -6 12

question

History, 07.03.2020 05:16

Giving brainliest. In the first decades of the 20th century, some Texans became enormously wealthy as a result of the oil industry. As a result, many...

question

Business, 07.03.2020 05:16

CakeCo, Inc. has three operating departments. Information about these departments is listed below. Maintenance is service department at CakeCo that in...

question

Computers and Technology, 07.03.2020 05:16

FOR PYTHON 3 scrabble_number(num) Description: Returns a scrabbled version of num by swapping the two digits of every consec...

question

History, 07.03.2020 05:16

Where did Roman gladiators square off for combat against other gladiators or against wild beasts? A- the Pantheon B- the Circu...

question

Business, 07.03.2020 05:16

Gracie Glynn has just become a product manager for Whoyser Products, Inc. and in charge of their new low cost pencil sharpener: the sharpener, will ha...

question

Mathematics, 07.03.2020 05:16

Which of the following values is closest to the standard deviation for the set of data shown below? 99, 78, 56, 11, 43, 22, 16, 31, 49, 28...

question

Spanish, 07.03.2020 05:16

1. Ustedes compran cuatro sillas. 2. Tú compras una mochila. 3. Nosotros compramos una mesa. 4. Yo compro una maleta. 5. É...

question

Spanish, 07.03.2020 05:16

Which translation is correct for the following sentence: I have a lot of homework in social studies class....

question

Biology, 07.03.2020 05:16

Genetic variation that occurs in sexually-reproducing organisms is mostly related to which of the following scientific laws? I. the law of...

question

Mathematics, 07.03.2020 05:16

The sum of the squares of 2 consecutive positive even numbers is is 340...

question

Mathematics, 07.03.2020 05:16

A local hamburger shop sold a combined total of 659 hamburgers and cheeseburgers on Sunday. There were 50 fewer cheeseburgers sold than hamburgers . H...

question

Physics, 07.03.2020 05:16

Consider two parallel disks of radius a separated by a small distance d. The space between the disks is filled with a conducting material of conductiv...

question

Social Studies, 07.03.2020 05:16

3. In which state did Woodrow Wilson go to college? A. Virginia. B. Georgia. C. South Carolina. D. New Jersey. 4. Which...

question

Health, 07.03.2020 05:16

10. These are easily stored in fats within the body until they are needed later, fat-soluble vitamins minerals calcium water-s...

question

Business, 07.03.2020 05:16

What amount would Becca declare on her income tax return if Becca and Suzanne had formed a Subchapter S corporation and there was no provision in thei...

question

Biology, 07.03.2020 05:16

The logistic model effectively has two components: the original exponential term (rN) and a second term (1 − N/K). What is the function of the second...

More questions: Physics Another questions

Questions on the website: 13722367