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
tamaranim1 [39]
2 years ago
12

You find a rock that is about 20 grams large. This rock contains about 10 grams of Uranium-235 and 10 grams of the element it de

cays into (Thorium-231). The half life of Uranium-235 is 700 million years. How old is this rock?
Physics
1 answer:
Elza [17]2 years ago
3 0

The age of the given rock is 700 million years.

The given parameters;

  • <em>original mass of the rock, = 20 g</em>
  • <em>mass of the rock remaining after decay, = 10 g</em>
  • <em>half life of Uranium, </em>t_{1/2}<em> = 700 years</em>

age of the rock ----------------------------- mass remaining

0 (t_0)  -------------------------------------------  20 g

1 half life (1 \ t_{1/2} ) ------------------------------ 10 g

Age of the rock = t_{1/2} - t_0 = 700 \ - 0 = 700 \ million \ years

Thus, the age of the given rock is 700 million years.

Learn more here:brainly.com/question/23774743

You might be interested in
Hai ô tô khởi hành cùng lúc từ A,B cách nhau 20 km chuyển động theo hướng từ A đến B vs vận tốc lần lượt là 60km/h và 40km/h
sdas [7]

Answer:

áp dụng công thức v = s/t

s là dộ dài qduong

v là vận tốc

t là thời gian

xuyên suốt 2 câu hỏi đều dùng công thức này

Explanation:

6 0
2 years ago
Why doesn't the skateboarder roll as high each time she goes up the ramp
Westkost [7]

Answer:

The skater has mechanical/gravitational potential energy at the two meter mark. The skater gets to two meters high on the other end of the ramp. In terms of the conservation of energy, the skater will never go higher than two meter on the other end of the the ramp because energy can be neither created nor destroyed.

Explanation:

I hoping it is right!!!∪∧∪     ∪ω∪

6 0
3 years ago
Read 2 more answers
Please help extra points!!!!
Allushta [10]

Answer:

If you increase either mass or velocity, the momentum of the object increases proportionally.

6 0
2 years ago
Need help in knowing what energy it’s using
ser-zykov [4K]

Answer:

8:P.E,9:gaining K.E,10:P.E,11:gaining K.E.

Explanation:

it gained potential energy at 8 because it was at its maximum height,and since potential energy is the energy that u posses due to ur height,thats the energy it possesed on the spot 8.as you can see on spot 9 its moving down so as its moving down,it gains kinetic energy,since its an energy possesed by a body due to its motion/movement,thats what it gained at spot 9, it gsained kineti energy because of its movement.and at 10 agian it would gain potential energy ecause of height and on point 11 as its heading upwards it gains kinetic energy because of movement.

4 0
2 years ago
as an aid in understanding this problem. The drawing shows a positively charged particle entering a 0.61-T magnetic field. The p
miv72 [106K]

Answer:

E = 420.9 N/C

Explanation:

According to the given condition:

Net\ Force = 2(Magnetic\ Force)\\Electric\ Force - Magnetic\ Force = 2(Magnetic\ Force)\\Electric\ Force = 3(Magnetic\ Force)\\qE = 3qvBSin\theta\\E = 3vBSin\theta

where,

E = Magnitude of Electric Field = ?

v = speed of charge = 230 m/s

B = Magnitude of Magnetic Field = 0.61 T

θ = Angle between speed and magnetic field = 90°

Therefore,

E = (3)(230\ m/s)(0.61\ T)Sin90^o

<u>E = 420.9 N/C</u>

3 0
3 years ago
Other questions:
  • Over a period of one year, how much of the overall (night) sky would a Bellingham observer be able to see?
    10·1 answer
  • What happened to the temperature as you travel from the surface of the earth to the center
    10·2 answers
  • John performs an experiment on an electric circuit. He increases the voltage from 25 volts to 50 volts while keeping the resista
    5·2 answers
  • Why does the unit of time enter twice in the unit of acceleration?
    5·1 answer
  • What kind of proof is required when disproving old ideas?
    9·1 answer
  • The weights of a large number of miniature poodles are approximately normally distributed with a mean of 99 kilograms and a stan
    14·1 answer
  • Dispositivo que muestra tanto la dirección como la magnitud de la corriente eléctrica.
    9·1 answer
  • Why is deforestation a serious global environment problem
    5·1 answer
  • Why was bowling one of the first racially integrated sports
    9·1 answer
  • Which of the following types of electromagnetic radiation has the lowest energy?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!