1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
zhuklara [117]
3 years ago
11

The activity of a radioisotope is found to decrease 40% of its original value in 2.59 x 10 s.

Physics
1 answer:
Rainbow [258]3 years ago
8 0

Answer: 0.0353\ s^{-1}

Explanation:

Given

Radioactive material is found to decrease 40% of its original value in 2.59\times 10\ s

Sample at any time is given by

N=N_oe^{-\lambda t}

where, \lambda=\text{decay constant}

Put values

\Rightarrow 0.4N_o=N_oe^{-\lambda\cdot 2.59\times 10}\\\Rightarrow 0.4=e^{-\lambda\cdot 2.59\times 10

Taking natural logarithm both side

\Rightarrow \lambda=\dfrac{\ln 2.5}{25.9}\\\\\Rightarrow \lambda =0.0353\ s^{-1}

You might be interested in
A cat is running at 24 m/s. It then accelerates at 7 m/s2. How long will it take the cat to reach a speed of 49 m/s?
kozerog [31]

Answer:

t should be 3.57 second

Explanation:

Formula used is v = u+at

In which v is final velocity, u is initial velocity, a is acceleration and t is time.

Substitute each of the info given into the formula and calculate.

49 = 24 + (7)t

t = 3.57s

8 0
3 years ago
PLEASE HELPPPP !!!! Scientific investigations must be well ____ to be sure the data collected will help answer the scientists qu
konstantin123 [22]
Answer-

Analyzed or conducted

Hope this helped
3 0
2 years ago
The two concepts or issues that you chose and explain how each either has contributed to or detracted from social change, specif
Rom4ik [11]

Racial equality directed to a scenario in which individuals of all races and ethnicities exists treated equally, regardless of any differences in physical characteristics.

<h3>What is meant by racial equality? </h3>

Racial equality occurs when organizations, like schools, give people of all races equal chances regardless of their physical characteristics, such skin color. It has always been difficult for ethnic minorities to achieve equality, especially in educational institutions.

According to research, black pupils face fewer expectations from their teachers and are more likely to be suspended or expelled than white students. They are also less likely to be enrolled in gifted programs.

The term "racial equality" describes a situation in which people of all races and ethnicities are treated equally, regardless of any physical distinctions. Racial equality occurs when institutions uphold people's moral, legal, and political rights.

To learn more about Racial equality refer to:

brainly.com/question/12645755

#SPJ9

3 0
1 year ago
Mr. Powell, a white man who does not believe that racial discrimination is a
SCORPION-xisa [38]

Answer:

Modern racism

Explanation:

Modern racism emanates from an aggressive prejudicial behavior to a more subtle prejudicial behavior. This subtle prejudicial behavior advanced to a degree that is much more difficult to see, yet is regarded as more severe. The modern form of racism is the workplace. Although many companies promise an equal opportunity, there is little doubt that everyone is treated equally within their place of work. Subtle, modern racism is believed to create an image that seems more politically correct. The politically correct way to discriminate is through a "polite" form of racism. In the past racism was easily defined and institutional

Modern racism is among the most widespread forms of verbally expressed negative racial attitudes in the United States .

3 0
3 years ago
0.0084x91 ...................
Drupady [299]

Answer:

0.0084×91=0.7644

Explanation:

hope this helps

8 0
3 years ago
Read 2 more answers
Other questions:
  • A block has a mass of 20g and meaures 2cm x 4cm x 2cm, will it sink or float
    6·1 answer
  • Astronomers have observed a small, massive object at the center of our Milky Way Galaxy. A ring of material orbits this massive
    9·1 answer
  • A scientist prepares a colloidal solution and pours it into a glass tank. She then flashes a beam of white light into one end of
    7·2 answers
  • Helppp me yfovkhovhivy
    10·1 answer
  • Two service technicians are discussing the best way to thread a rod. Technician A says they should use a tap and die set. Techni
    12·1 answer
  • which cell structure is responsible for taking in and breaking down foreign particles and damaged organelles?
    15·1 answer
  • The plane of a5cm*8cm rectangular loop of wire is parallel to a 0.19T magnetic field the loop carries a current of 6.2 A. What t
    8·1 answer
  • Compound name: for C3N6
    15·1 answer
  • Which statement is true about the image produced by a plane mirror?
    14·1 answer
  • A student uses the right-hand rule as shown. an illustration with a right hand with fingers curled and thumb pointed up. what is
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!