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
Leto [7]
3 years ago
9

A sample contains 20 kg of radioactive material. The decay constant of the material is 0.179 per second. If the amount of time t

hat has passed is 300 seconds, how much of the original material is still radioactive? Show all work
Physics
1 answer:
Nataly [62]3 years ago
4 0

Answer:

Explanation:

Given

N0 = 20kg (original substance)

decay constant λ = 0.179/sec

time t = 300s

We are to find N(t)

Using the formula;

n(t) = N0e^-λt

Substitute the given values

N(t) = 20e^-(0.179)(300)

N(t) = 20e^(-53.7)

N(t) = 20(4.7885)

N(t) =143.055

To know how much of the original material that is active, we will find N(t)/N0 = 143.055/20 = 7.152

About 7 times the original material is still radioactive

You might be interested in
What is the center of a tornado called A.the eye B. The center C. The middle road D. The vortex
Pachacha [2.7K]
A. The eye is correct
3 0
4 years ago
Read 2 more answers
Cual es el esfuerzo que puede provocar un corte en el material
jolli1 [7]

Answer:

El esfuerzo cortante, de corte, de cizalla o de cortadura es el esfuerzo interno o resultante de las tensiones paralelas a la sección transversal de un prisma mecánico como por ejemplo una viga o un pilar. Se designa variadamente como T, V o Q.

Este tipo de solicitación formado por tensiones paralelas está directamente asociado a la tensión cortante. Para una pieza prismática se relaciona con la tensión cortante mediante la relación:

(1){\displaystyle Q_{y}=\int _{\Sigma }\tau _{xy}\ dydz,\qquad Q_{z}=\int _{\Sigma }\tau _{xz}\ dydz,\qquad Q={\sqrt {Q_{y}^{2}+Q_{z}^{2}}}}

Para una viga recta para la que sea válida la teoría de Euler-Bernoulli se tiene la siguiente relación entre las componentes del esfuerzo cortante y el momento flector:

5 0
4 years ago
I need help on 11 - 14
posledela
The answer is negative three

5 0
3 years ago
Read 2 more answers
How do other factors affect the climate of a region
Alexeev081 [22]
Direction of prevailing winds. shape of the land (known as 'relief' or 'topography') distance from the equator. the El Niño phenomenon.
4 0
4 years ago
A piece having a length of 4.0 cm was cut from a much longer, uniform rod. The piece has a volume of 3.0 cm3 and a mass of 24 g.
Gre4nikov [31]

Answer: 96

Explanation:

6 0
3 years ago
Other questions:
  • Which kind of air front forms when a warm air mass meets the area of a cooler air mass?
    6·1 answer
  • Why are some isotopes used as tracers?
    8·1 answer
  • 4. A metal of mass 1.55kg was heated from 300K to 320K in 6 minutes by a boiling ring of 85 W rating, calculate the specific hea
    13·1 answer
  • Which of the following is a heterogeneous mixture
    7·1 answer
  • A bike accelerates uniformly from rest to a speed of 8.20 m/s over a distance of 45.6 m. Determine the
    7·1 answer
  • What is the main role of the cell membrane?
    13·2 answers
  • Why is g called the universal gravitational constant<br>​
    12·1 answer
  • Electromagnetic waves are sometimes demonstrated by rippling waves in water. However, electromagnetic waves are different from w
    10·2 answers
  • If Goku sprints and tackles a large metal crate doing 18002 J of work over the course of
    11·1 answer
  • Which indicates that light travels in straight lines?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!