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
Reika [66]
3 years ago
13

What is half-life? a. Half-life is a term that describes the time it takes for half of a particle to disintegrate c. Half-life i

s a term that describes the time it takes for the amount of radioactivity to increase by one half. b. Half-life is a term that describes the time it takes for the amount of radioactivity to go down by one half. d. None of the above
Physics
1 answer:
Alisiya [41]3 years ago
4 0
Well, half-life is the radioactivity of an identified isotope that decreases by half of the actual value.
So, your answer would be C. 
You might be interested in
An experiment is designed to see if sleep affects the number of vocabulary words subjects can remember. The dependent variable i
Kaylis [27]

The dependent variable is: <em>"number of vocabulary words subjects can remember"</em>

<h3>Which is the dependent variable?</h3>

In an experiment, we basically see how changing one variable affects another variable.

In this case, the experiment is:

<em>" if sleep affects the number of vocabulary words subjects can remember."</em>

Then the hours of sleep would be the independent variable (the one that the scientist can change) and the number of vocabulary words subjects can remember is the dependent variable (that depends on the independent variable).

So the correct answer is:

<em>"number of vocabulary words subjects can remember"</em>

If you want to learn more about variables:

brainly.com/question/15246027

#SPJ1

7 0
2 years ago
What is this? Plz I need help...
RSB [31]

Answer:

the time it takes for one complete back and forth swing

Explanation:

the Mark's is showing you the time it swings back and forth

4 0
3 years ago
What are all the principles of Cell Theory. Group of answer choices Cell only form from living cells All cells have chromosomes
Marta_Voda [28]

Answer:

Cell theory is the scientific theory that states that all living things are composed of cells and that cells are the basic unit of life. The three principles of cell theory are the cell is the smallest unit of life, all cells come from preexisting cells, and cells are the basic unit of function in living things.

Explanation:

Please mark me brainliest

6 0
1 year ago
Mike is standing on the roof of a building looking at the roof of the neighboring building that is 15 meters away and 10 meters
amid [387]

Answer:

Part a)

t = 1.65 s

Part b)

x = 40.4 m

Since the distance of other building is 15 m so YES it can make it to other building

Part c)

v = 27.3 m/s

direction of velocity is given as

[tex]\theta = 26.35 degree

Explanation:

Part a)

acceleration due to gravity on this planet is 3/4 times the gravity on earth

So the acceleration due to gravity on this new planet is given as

a = \frac{3}{4}(9.81)

a = 7.36 m/s^2

now the vertical displacement covered by the canister is given as

y = 10 m

now by kinematics we have

y = \frac{1}{2}gt^2

10 = \frac{1}{2}(7.36)t^2

t = 1.65 s

Part b)

Horizontal speed of the canister is given as

v_x = 24.5 m/s

now the distance moved by it

x = v_x t

x = 24.5 (1.65)

x = 40.4 m

Since the distance of other building is 15 m so YES it can make it to other building

Part c)

Final velocity in X direction will remains the same

v_x = 24.5 m/s

final velocity in Y direction

v_y = v_i + at

v_y = 0 + (7.36)(1.65)

v_y = 12.14 m/s

now magnitude of velocity is given as

v = \sqrt{v_x^2 + v_y^2}

v = \sqrt{24.5^2 + 12.14^2}

v = 27.3 m/s

direction of velocity is given as

\theta = tan^{-1}\frac{v_y}{v_x}

\theta = tan^{-1}\frac{12.14}{24.5}

[tex]\theta = 26.35 degree

6 0
2 years ago
an automobile has a tire pressure of 325 kpa when the temperature is 10°C of the temperature rises to 50°C what is the new press
Finger [1]
Old temperature = 283 K.
New temp = 323 K.

(323/283) x (325 kPa) = 371 kPa.
8 0
2 years ago
Other questions:
  • Find the change in the force of gravity between two planets when the distance between them is reduced to one-tenth of the origin
    10·1 answer
  • Which of the following states of matter has a define shape
    15·1 answer
  • A girl on the beach sees 8 waves pass in 4 s. If the wavelength of each
    12·2 answers
  • An archer wishes to shoot an arrow at a target at eye level a distance of 50.0m away. If the initial speed imparted to the arrow
    13·1 answer
  • True or false an.organic compound contains the elements carbon
    8·2 answers
  • Which structure has functions in both the respiratory system and the digestive system?
    13·2 answers
  • Please please please please can someone please help me with this. thank you ​
    15·1 answer
  • How many seasons are there in a year
    8·2 answers
  • A hunter who is standing 220.0-m away fires his rifle. How long (in seconds) will it take the sound to travel to your ear.
    13·1 answer
  • Please help me, anybody?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!