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
AfilCa [17]
2 years ago
5

A student has an 80 g sample of a radioactive material that has a half-life of 20 seconds. How much material will he have left a

fter 60 seconds?
A.
10 g

B.
20 g

C.
40 g

D.
5 g
Physics
1 answer:
Juliette [100K]2 years ago
7 0
The answer is C 40 g
You might be interested in
Which of the following is NOT a geological event caused by the movement of tectonic plates?
photoshop1234 [79]
The answer is A. Mountains form because tectonic plates overlap. Earthquakes form because of the moving of tectonic plates. The moving of tectonic plates causes holes in the crust so magma from the mantle escapes and erupts from volcanoes. I hope I helped!
6 0
3 years ago
Which of the following statements best describes energy conservation in heat engines?
Lorico [155]
B is the correct answer
5 0
3 years ago
During which of the following chemical changes does a precipitate form?
babymother [125]

Answer is B.........

5 0
4 years ago
Read 2 more answers
How do waves interact with our senses?
k0ka [10]

Answer:

well sound waves interact with our ears and light interacts with our vision

Explanation:

5 0
3 years ago
Read 2 more answers
An object moving at 30 m/s takes 5 sec. to come to a stop.  What is the object’s acceleration​
Klio2033 [76]

Answer:

6 m/s²

Explanation:

a=v/t

a= 30 m/s÷ 5 sec= 6 m/s²

4 0
3 years ago
Other questions:
  • Why sodium &pottasium are kept under kerosine
    10·1 answer
  • Explain why it is easier to climba mountain on a zigzag path rather than one straight up the side. Is your increase in gravitati
    8·1 answer
  • A 0.0250 kg sock spins in a dryer of radius 0.225 m once every 0.304s. how much centripetal force acts on the sock?(unit=N)
    5·1 answer
  • A ball with a mass of 275 g is dropped from rest, hits the floor and rebounds upward. If the ball hits the floor with a speed of
    7·1 answer
  • Energy that is stored due to types of bonds and arrangement of atoms refers to ___________ energy
    5·2 answers
  • The loudness of a sound is determined by the __________, or height, of the sound wave.
    8·2 answers
  • The visible light spectrum ranges between
    15·2 answers
  • A car of mass 750 kg has an initial speed of 75 mph. Traveling in a straight line, its speed is increased uniformly to 120 mph i
    5·1 answer
  • A small car and a large heavier bus are traveling at the same speed. Which has more momentum?
    14·1 answer
  • Explain constant and changing velocity.
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!