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
kap26 [50]
3 years ago
8

Radioactive decay of 40k atoms in an igneous rock has resulted in a radio of 25 percent 40k atoms to 75 percent 40Ar and 40Ca at

oms. How many years old is this rock
Physics
1 answer:
Ivanshal [37]3 years ago
6 0
In order to answer this, we would need to know
the half-life of ⁴⁰K.  Perhaps when you look that up,
you'll be able to answer this on your own.

You might be interested in
Which cells or organs are considered to be part of both the immune and lymphatic systems? Select all that apply.
Leviafan [203]

Answer:

lymph nodes

tonsils and adenoids

thymus

Explanation:

-Arteries are the blood vessels that take the blood that contains oxygen from the heart to the tissues and are part of the circulatory system.

-Lymph nodes are glands that take care of filtering the fluid that goes through the lympathic system and are also important for the functioning of the immune system.

-Capillaries are blood vessels that connect the veins and arteries and are part of the circulatory system.

-Tonsils and adenoids are located in the throat and they help protect the body from diseases and they are part of immune system and the lympathic system.

-Veins are the vessels that take the blood to the heart and they are part of the circulatory system.

-Thymus is an organ in which the T cells develop and they help protect the body against virus and bacteria and it is part of the immune and lympathic systems.

According to this, cells or organs that are considered to be part of both the immune and lymphatic systems are:

lymph nodes

tonsils and adenoids

thymus

8 0
3 years ago
A cart travels down a ramp at an average speed of 5.00 centimeters/second. What is the speed of the cart in
Lostsunrise [7]
<span>A cart travels down a ramp at an average speed of 5.00 centimeters/second. What is the speed of the cart in miles/hour?  </span> To solve this problem we have set the conversion values to determine the product during the conversion process. <span><span>
1.   </span>1 centimeter = 0.00000621371 mile</span> <span><span>
2.   </span><span> 1 hour = 60 minutes</span></span> <span><span>3.   </span><span> 1 minute = 60 seconds</span></span>
Thus, we shall have
<span><span>1.   </span>5 cm x 0.00000621371 mile/1cm = 0.000031069 mi</span>
<span><span>2.   </span>0.000031069 seconds x 1 hr / 3600 = 0.111846815 miles / hr</span>  



8 0
3 years ago
Read 2 more answers
The unit for IMA is _____. newtons joules meters IMA is unitless
Sonja [21]

The correct answer to the question is unitless i.e the IMA of a mechanical system has no unit.

EXPLANATION:

The IMA of a mechanical system stands for ideal mechanical advantage.  It can be defined as the number of times the input or effort force provided to the mechanical system is multiplied under ideal conditions. The ideal conditions means that the system is free from friction, air resistance etc.

Let us consider d_{i} is the distance over which the input force is applied.

Let d_{0} is the distance over which the output force is applied.

The ideal mechanical advantage of the system is calculated as -

                    IMA = \frac{d_{i}} {d_{0}}.

Both d_{i}\ and\ d_{0} are measured in distance unit.

Hence, IMA is a unitless physical quantity.

7 0
4 years ago
Read 2 more answers
Suppose the wavelength of the light is 450 nm . how much farther is it from the dot on the screen in the center of fringe e to t
lbvjy [14]

Since you are looking at a right fringe, the answer is all the time a multiple of the wavelength for the reason that the light makes constructive intrusion. If you are looking at the center (zeroth) fringe, the difference is (450)(0) = 0. For the first maximum, the difference is 450 nm. For the second, it is 450 x 2 = 900 nm. Basically, for the nth maxima, the difference is 450n. 

8 0
3 years ago
What is the definition of Potential Energy?
Margarita [4]

Answer: its The ability to do work or cause change.  Energy of an object due to its motion.

Explanation:In physics, potential energy is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors.

5 0
4 years ago
Other questions:
  • Find the wavelength of a wave traveling at 3.26 e6 m/s with a period of 0.0125 s.
    7·1 answer
  • Can someone help explain why hitting/catching a baseball are examples of elastic/inelastic collisions?
    12·2 answers
  • Need help on physics/momentum ​
    8·1 answer
  • What kind of medium does ocean waves have
    11·1 answer
  • Which diagram best represents the field around a positively charged particle?
    7·1 answer
  • 1.- Que distancia recorrió una carga de 2,5x10-6 coul, generando así un campo eléctrico de 55new/coul.​
    5·1 answer
  • A train is traveling at 28 m/s. It slows to 6 m/s in 4 s. Calculate the distance the train
    13·2 answers
  • Look at the picture it is the graph of two moving vehicles A and B, which one of them is moving faster.
    5·2 answers
  • How long does it take to charge an electric car at a charging station?
    15·2 answers
  • Two point charges are on the y axis. A 4.50-σC charge is located at y=1.25 cm , and a -2.24-σC charge is located at y=-1.80 cm.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!