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

Author Question: At 9 a.m. on Monday a radioactive sample contained four million nuclei. At 9 a.m. on Friday three ... (Read 67 times)

justinmsk

  • Hero Member
  • *****
  • Posts: 524
on: Jul 28, 2018
At 9 a.m. on Monday a radioactive sample contained four million nuclei. At 9 a.m. on Friday three million of these nuclei had decayed. The half-life of this sample is:
 a. 5 days b. 4 days c. 3 days d. 2 days e. 1 day

Question 2

An airplane flies in a horizontal circle of radius 500 m at a speed of 150 m/s. If the radius were changed to 1 000 m, but the speed remained the same, by what factor would its centripetal acceleration change?
 a. 0.25
  b. 0.50
  c. 1.00
  d. 2.00
  e. 4.00


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

mcinincha279

  • Sr. Member
  • ****
  • Posts: 316
Reply #1 on: Jul 28, 2018
Answer to Question 1

d

Answer to Question 2

B


justinmsk

  • Member
  • Posts: 524
Reply 2 on: Jul 28, 2018
Excellent

miss_1456@hotmail.com

  • Member
  • Posts: 289
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

The horizontal fraction bar was introduced by the Arabs.

Did you know?

Stevens-Johnson syndrome and Toxic Epidermal Necrolysis syndrome are life-threatening reactions that can result in death. Complications include permanent blindness, dry-eye syndrome, lung damage, photophobia, asthma, chronic obstructive pulmonary disease, permanent loss of nail beds, scarring of mucous membranes, arthritis, and chronic fatigue syndrome. Many patients' pores scar shut, causing them to retain heat.

Did you know?

Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

Did you know?

The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

Did you know?

It is difficult to obtain enough calcium without consuming milk or other dairy foods.

A small sample of the great diversity of seed sizes and shapes. A small sample of the great diversity of seed sizes and shapes.
Blood glucose measurement. A postprandial test may be self-administered. (a) A lance pierces the ski Blood glucose measurement. A postprandial test may be self-administered. (a) A lance pierces the ski
Sample hypoglycemic protocol. Sample hypoglycemic protocol.
Sample budget spreadsheet form for first year of business. Sample budget spreadsheet form for first year of business.
Types of Radioactive Decay Types of Radioactive Decay
Suppose that we have a sample space with five equally likely experimental outcomes: E1, E2, E3, ... Suppose that we have a sample space with five equally likely experimental outcomes: E1, E2, E3, ...
Video: Coronary Heart Disease

For a complete list of videos, visit our video library