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
A 615.00 kg race car is uniformly traveling around a circular race track. It takes the race car 20.00 seconds to do one lap arou
koban [17]

Answer:

The value is  f  =  0.05 \ Hz

Explanation:

From the question we are told that

     The mass of the car is  m  =  615 \  kg

      The period of the circular motion is  T  =  20 \  s

      The radius  is r =  80 \  m/s

Generally the frequency of the circular motion is  

       f  =   \frac{1}{T }

=>    f  =   \frac{1}{ 20  }

=>    f  =  0.05 \ Hz

3 0
3 years ago
Use the graph below to answer the following question: What is happening to the object's velocity?
hjlf

The object's velocity is decreasing.

Explanation:

From graph is the attached image, we can clearly point that the velocity of this motion is decreasing with time.

Velocity is a vector quantity.

  • The y-axis represent displacement.
  • The x-axis depicts time
  • Using the graph, we know that the slope of the line on the graph gives us the velocity as it denotes the change of displacement with time.
  • When we find the slope, it will give us a negative value which shows that the body is slowing down and not increasing speed.

learn more:

Velocity brainly.com/question/4460262

#learnwithBrainly

4 0
3 years ago
The position of a certain airplane during takeoff is given by x=1/2 *bt2, where b = 2.0 m/s2 and t = 0 corresponds to the instan
Serhud [2]

Answer:

1362000 kgm/s

Explanation:

So the total mass combination of the plane and the people inside it is

M = 35000 + 160*65 = 45400 kg

After 15 seconds at an acceleration of 2 m/s2, the plane speed would be

V = 2*15 = 30 m/s

So the magnitude of the plane 15s after brakes are released is

MV = 45400 * 30 = 1362000 kgm/s

5 0
2 years ago
Argument changes meaning because of an ambiguous word or phrase.
Virty [35]
I think the answer is D
7 0
3 years ago
The two loudspeakers in the drawing are producing identical sound waves. The waves spread out and overlap at the point P. What i
Damm [24]

Answer:

5/2π

Explanation:

According to quizlet the answer is 5/2π

5 0
3 years ago
Other questions:
  • What is the fleas acceleration as it extends its legs
    8·1 answer
  • 1) ________ is a force that you can fell with your feet
    13·1 answer
  • The flywheel of a steam engine runs with a constant angular velocity of 150 rev/min. When steam is shut off, the friction of the
    9·1 answer
  • A Carnot heat engine uses a hot reservoir consisting of a large amount of boiling water and a cold reservoir consisting of a lar
    11·1 answer
  • A substance that will change shape to fit its container but has a definite volume is in a phase of matter.
    8·2 answers
  • A hot iron horseshoe (mass = 0.35 kg ), just forged, is dropped into 1.40 L of water in a 0.45 kg iron pot initially at 22.0°C.
    8·1 answer
  • In a series circuit with three bulbs,
    6·2 answers
  • Focusing on irelevant information can negatively impact the ability to reason and problem solve effectively.
    15·1 answer
  • Write the total equation for the proton-proton chain reaction that takes place in stars?
    12·1 answer
  • If a dog that has moved has a displacement of zero, it means that the dog's initial position and final position are the same. Is
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!