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
ivolga24 [154]
3 years ago
11

what is the half life of a radioactive isotope that decreased to one-fourth its original amount in 100 year

Physics
1 answer:
hichkok12 [17]3 years ago
3 0
Two times 100 years = 200 years is half life

You might be interested in
How do open-market operations change the money supply?
Greeley [361]
If they want to increase the money supply<span> in the economy it </span>will<span> buy securities. Conversely, if the they want to </span>decrease the money supply<span>, it </span>will<span> sell securities.</span>
6 0
3 years ago
Use at least two to three completed content related sentences to explain why physics is considered the basic science. Provide at
Virty [35]
Idk your answer sorry
6 0
3 years ago
Read 2 more answers
______ uses radioactive materials to create contrast in the body and help form images of the structure and function of organs.
satela [25.4K]

Answer:

Nuclear medicine or PET scanning (Positron Emission Tomography)

Explanation:

Not super sure what your question is looking for but I think it can be either. PET is a technology used in the nuclear medicine field, and nuclear medicine is a broad field of using the technology the question described.

8 0
2 years ago
A beam of light has a wavelength of 650 nm in vacuum. (a) What is the speed of this light in a liquid whose index of refraction
Lady_Fox [76]

Answer:

The speed of this light and wavelength in a liquid are 2.04\times10^{8}\ m/s and 442 nm.

Explanation:

Given that,

Wavelength = 650 nm

Index refraction = 1.47

(a). We need to calculate the speed

Using formula of speed

n = \dfrac{c}{v}

Where, n = refraction index

c = speed of light in vacuum

v = speed of light in medium

Put the value into the formula

1.47=\dfrac{3\times10^{8}}{v}

v=\dfrac{3\times10^{8}}{1.47}

v= 2.04\times10^{8}\ m/s

(b). We need to calculate the wavelength

Using formula of wavelength

n=\dfrac{\lambda_{0}}{\lambda}

\lambda=\dfrac{\lambda_{0}}{n}

Where, \lambda_{0} = wavelength in vacuum

\lambda = wavelength in medium

Put the value into the formula

\lambda=\dfrac{650\times10^{-9}}{1.47}

\lambda=442\times10^{-9}\ m

Hence, The speed of this light and wavelength in a liquid are 2.04\times10^{8}\ m/s and 442 nm.

3 0
3 years ago
Critics of the electoral college argue that the system can result in the selection of —
Romashka [77]

Answer:

President who did not win the popular vote

Explanation:

Critics of the Electoral college argue that the system can result in a selection of what?

6 0
3 years ago
Other questions:
  • Which of the following characterizes the particles in this diagram?
    9·1 answer
  •  Our attitudes influence
    8·1 answer
  • The diagram below shows a portion of the rock cycle.
    11·1 answer
  • Assume that a machine puts out 8000 joules of work when the user puts in 10,000 joules of work. What is the efficiency of the ma
    15·1 answer
  • Describe how we can use scientific knowledge and reasoning to help guide us when making decisions
    12·1 answer
  • Give 2 examples of mountain ranges in the world that have been caused by folding
    7·1 answer
  • What do all the items that light up a bulb have in common? (help)
    6·1 answer
  • The second-order dark fringe in a single-slit diffraction pattern is 1.40 mm from the center of the central maximum. Assuming th
    5·1 answer
  • Use of lubricants increase efficency of machine​
    6·1 answer
  • A snail can move approximately.3 meters per minute. How many<br> meters can a snail travel in 45min?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!