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
kati45 [8]
3 years ago
6

Plutonium-241 is an isotope of plutonium that is highly radioactive and is used in some nuclear reactors and many nuclear weapon

s. It has a half-life of 14.4 years. If 1000g of Pu-241 is placed in storage at a weapons plant, how much will still be remaining after 28.8 years?
Physics
2 answers:
choli [55]3 years ago
7 0
We use the radioactive decay equation for this problem which is expressed as:

An = Aoe^-kt

An is the remaining amount after time t, Ao is the initial amount and k is a constant.

First, we determine the k from the half life as follows:

An/Ao = 1/2 = e^-k(14.4)
k = 0.04814

Then, we can calculate An after 28.8 yr.

An = 1000 e^-0.04814(28.8)
An = 250 g
Andrew [12]3 years ago
6 0

Answer:

250g

Explanation:

i just took the test

You might be interested in
An object, initially at rest, is subject to an acceleration of 34 m/s^2. How long will it take for that object to reach 3400m ?
Norma-Jean [14]
Vf^2 = Vi^2 + 2ad
a= 34 m/s^2
Vi = 0 m/s
d = 3400m

Vf = 480.83 m/s

a=v/t
t=v/a
t=480.83/34
t=14.142 s
6 0
3 years ago
If distance between two charges increased by 2 times then force
kati45 [8]

Explanation:

The size of the force varies inversely as the square of the distance between the two charges. Therefore, if the distance between the two charges is doubled, the attraction or repulsion becomes weaker, decreasing to one-fourth of the original value.

5 0
3 years ago
In a real system of levers, wheels, or pulleys, the AMA is less than the IMA because _____.
pickupchik [31]
In a real system of levers, wheels, or pulleys, the AMA is less than the IMA because of friction. 
AMA (Actual mechanical advantage) is found by dividing output force by effort force. The actual mechanical advantage will always be less than the ideal mechanical advantage. The ideal mechanical advantage assumes perfect efficiency which doesn't account for friction, while actual mechanical advantage does. Therefore; the IMA is always greater than the actual mechanical advantage because all machines must overcome friction. 
5 0
3 years ago
During chemistry class, Carl performed several lab tests on two white solids. The results of three tests are seen in the data ta
Nastasia [14]

Answer: it’s c) ionic

Explanation:

6 0
3 years ago
Read 2 more answers
An early method of measuring the speed of light makes use of a rotating slotted wheel. A beam of light passes through one of the
Readme [11.4K]

Answer:

4.7 x 10³ rad / s

Explanation:

During the time light goes and comes back , one slot is replaced by next slot while rotating  before the light source

Time taken by light to travel a distance of 2 x 500 m is

= (2 x 500) / 3 x 10⁸

= 3.333 x 10⁻⁶ s .

In this time period, two consecutive slots come before the source of light one after another by rotation. There are 400 slots so time taken to make one rotation

= 3.333 x 10⁻⁶ x 400

= 13.33 x 10⁻⁴ s

This is the time period so

T = 13.33 X 10⁻⁴

Angular speed

= 2π / T

= \frac{2\times3.14}{13.33\times10^{-4}}

4.7 x 10³ rad / s

5 0
3 years ago
Other questions:
  • Force can be represented by
    7·1 answer
  • A wave with a short wave length will also have...?
    15·1 answer
  • How do we know Earth is spinning, not the Sun?
    8·1 answer
  • A circular loop of wire with a radius of 12.0 cm and oriented in the horizontal xy-plane is located in a region of uniform magne
    12·1 answer
  • Which of the following items could be dated by the use of radiocarbon dating?
    15·2 answers
  • (PLEASE HELP ASAP) Which chemical equation models the law of conservation of mass?
    5·2 answers
  • What is the speed of a car that travels 50m in 25min? *
    15·2 answers
  • You push a 22.0 kg box along a rough floor at a constant velocity. The coefficient of kinetic friction between the box and the f
    7·1 answer
  • G.P.E = weight (n) x height (m). 2 identical twins are skiing down 2 different slopes. one is 1000m high, the other is 1500 m hi
    5·2 answers
  • a 70 kg man standing on ice throws a 3 kg body horizontally at 8 m/s. the friction coefficient between the ice and his feet is 0
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!