This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: If the insolation upon a flat plate collector is 800 Btu/ft2/day, how large must the collector be to ... (Read 152 times)

fnuegbu

  • Hero Member
  • *****
  • Posts: 539
on: Jul 28, 2018
If the insolation upon a flat plate collector is 800 Btu/ft2/day, how large must the collector be to provide 30,000 Btu/hr of thermal energy for an entire day? Take the efficiency of the collector to be 50.
 a. 150 b. 750 c. 1800 d. 4000 e. 7200 ft2

Question 2

You throw a ball up in the air and hold your hand under it to catch it when it comes down. The reason why the ball stops is because
 a. your hand is there: your hand exerts no force on the ball.
  b. your hand exerts a force on the ball perpendicular to its velocity.
  c. your hand exerts a force on the ball in the direction of its velocity.
  d. your hand exerts a force on the ball in the direction opposite to its velocity.
  e. your hand and the ball exert forces in the same direction on each other.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

31809pancho

  • Sr. Member
  • ****
  • Posts: 317
Reply #1 on: Jul 28, 2018
Answer to Question 1

c

Answer to Question 2

D


fnuegbu

  • Hero Member
  • *****
  • Posts: 539
Reply #2 on: Jul 28, 2018
Thanks


31809pancho

  • Sr. Member
  • ****
  • Posts: 317
Reply #3 on: Jul 28, 2018
Welcome :)


« previous next »
 

Did you know?

Disorders that may affect pharmacodynamics include genetic mutations, malnutrition, thyrotoxicosis, myasthenia gravis, Parkinson's disease, and certain forms of insulin-resistant diabetes mellitus.

Did you know?

All adverse reactions are commonly charted in red ink in the patient's record and usually are noted on the front of the chart. Failure to follow correct documentation procedures may result in malpractice lawsuits.

Did you know?

About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.

Did you know?

To maintain good kidney function, you should drink at least 3 quarts of water daily. Water dilutes urine and helps prevent concentrations of salts and minerals that can lead to kidney stone formation. Chronic dehydration is a major contributor to the development of kidney stones.

Did you know?

When taking monoamine oxidase inhibitors, people should avoid a variety of foods, which include alcoholic beverages, bean curd, broad (fava) bean pods, cheese, fish, ginseng, protein extracts, meat, sauerkraut, shrimp paste, soups, and yeast.

(a) Large buttress roots in a tropical rain forest (a) Large buttress roots in a tropical rain forest
A typical TP sensor mounted on the throttle plate of this port-injected engine. A typical TP sensor mounted on the throttle plate of this port-injected engine.
Different hand positions and working surfaces for massage applications on large muscles. A. Flat ... Different hand positions and working surfaces for massage applications on large muscles. A. Flat ...
Reconnect the lower and upper back with horizontal stroking from lower back to shoulders. Keep flat, ... Reconnect the lower and upper back with horizontal stroking from lower back to shoulders. Keep flat, ...
Knead lower leg muscles by bending the knee until the foot is flat on the supporting surface. Reach ... Knead lower leg muscles by bending the knee until the foot is flat on the supporting surface. Reach ...
Directions and Rates of Plate Motions Directions and Rates of Plate Motions
Video: Optic Nerve and Optic Disk Animation (Part 2 of 2)

For a complete list of videos, visit our video library