Lead-202 has a half-life of 53,000 years. How long will it take for 15/16 of a sample of lead-202 to decay?
106,000 years
159,000 years
212,000 years
265,000 years
(Thank you very much :L)

Answers

Answer 1

Answer:

C. 212,000 years

Explanation:

believe me it's correct.....and you're welcome :)


Related Questions

Think about the force that causes a planet to orbit the Sun and the direction of this
force. How does a puck swung by a string on the table relate to a planet orbiting the
Sun? What forces are acting on the puck and what forces are acting on the planet

Answers

Answer:

1) For the swung puck tied to the string that has a mass m₁ and having another mass m₂ attached to the string that passes through a hole in the table, such that m₂ > m₁

The swung puck rotating on the table is kept in the circular motion on the table by the centripetal force acting towards the center of its rotation along the string, which is given by the amount the weight of m₂ exceeds m₁, in the same way a planet moving around the Sun is kept in its orbit by the gravitational attraction between the planet and the Sun.

2) i) The forces acting on the puck are;

a) The centripetal force in the string, acting inward, towards the center of rotation provided by the weight of m₂

b) The centrifugal force of the puck, acting outward, tending to continue its motion in a straight line

ii) The forces acting on the planet are;

a) The force of gravitational attraction between the planet and the Sun, acting towards the Sun, such that, the planet revolves around the Sun

b) The centrifugal force of the planet, acting outward, tending to move in a linear or straight path

Explanation:

Forces on Puck  Swung

Centrifugal Force (Outwards from  puck swung  )

Tension( Towards the center)

Forces on the Planet

Centrifugal Force (Outwards from  Planets  )

Gravitational Force ( Inwards towards Sun )

Let us suppose that the

The  puck swung is connected with a center at a distance of radius  r

so it is revolving around the point  just like planets revolve around the Sun.

The Centrifugal  Force and Gravitational Force  causes the planetary motion around the sun.

The Centrifugal force is an outward force  and is observed  from the accelerated frame of reference , In our case Planet and  puck swung are    the accelerated frame of references.

The Gravitational Force between the Sun and the planets  (directed towards Sun) is balanced by Centrifugal Force.

Let us consider that the string of  puck swung has negligible mass

So the Tension which is directed towards the center will provide the  force to counterbalance the centrifugal  force acting on puck swung.

So Tension will act towards the center in case of puck swung and centrifugal force will act outwards.

For more information please refer to the link below

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A baseball bat strikes a baseball of mass that is at rest, and as a result the baseball files away from the bat. The kinetic energy gained by the
baseball as it leaves the bat is due to the
(A) loss of mass after the ball is hit.
(B) gain in potential energy as the ball rises to the peak of its trajectory
(C) loss of potential energy of the ball as it falls back to the ground
(D) work done by the bat on the ball

Answers

Answer:

The correct option is D

Explanation:

When an object at rest is acted upon by an external force, the motion gained (of the body) will proceed in the direction of the force. This is caused by the workdone by the bat on the ball. The motion gained mentioned earlier is the kinetic energy.

Kinetic energy can be described as the energy in a moving object.

Answer:

(D) work done by the bat on the ball

Explanation:

The principle of work-energy theorem, states that work done by the sum of all the forces acting on an object, is equal to the gain in the kinetic energy of the object.

When the baseball bat strikes the baseball which causes a displacement in the initial position of the baseball, work is said to be done which is equal to the change in the kinetic energy of the baseball.

Thus, The kinetic energy gained by the baseball as it leaves the bat is due to the work done by the bat on the ball.

The distance recorded for riding a motorcycle on its rear wheel without stopping is more than 320 km! Suppose the rider in this impressive position is traveling with an initial velocity of 8.0 m/s before accelerating. Then the rider travels 40.0 m at a constant acceleration of 2.00 m/s2. What is the rider's velocity after the acceleration?

Answers

Answer:

14.97m/s

Explanation:

Given

Initial velocity of the car u = 8m/s

Distance travelled by the rider S = 40m

Acceleration a = 2m/s²

Required

rider's velocity after the acceleration v

Using the equation of motion

v² = u²+2as

v² = 8²+2(2)(40)

v² = 64+160

v² = 224

v = √224

v = 14.97m/s

Hence the rider's velocity after the acceleration is 14.97m/s

A Boy has a ball and throws it straight up into the air with an initial velocity of 6 m/s. Calculate the maximum height of the ball and the time the ball is in the air.

Answers

Answer:

i. 1.84 m

ii. The ball's time in the air is 1.23s.

Explanation:

The ball moves upward (against the gravitational pull) with an initial velocity of 6 m/s.

I. Applying the third equation of free fall, the maximum height is;

[tex]V^{2}[/tex] = [tex]U^{2}[/tex] - 2gs

where the variables have there usual meaning.

[tex]V^{2}[/tex] = 0 m/s, [tex]U^{2}[/tex] = 6 m/s, g = 9.8 m/[tex]s^{2}[/tex].

0 = [tex]6^{2}[/tex] - 2 x 9.8 x s

0 = 36 - 19.6s

⇒ 19.6s = 36

s = [tex]\frac{36}{19.6}[/tex]

 = 1.8367

 = 1.84 m

The maximum height of the ball is 1.84 m.

II. The time the ball was in air can be determined by,

time of flight, T = [tex]\frac{2USin A}{g}[/tex]

where U is the initial velocity of the ball, A is the angle of projection and g is the acceleration due to gravity.

U = 6 m/s, A = [tex]90^{o}[/tex] (since the ball is thrown vertically upward), and g = 9.8 m/[tex]s^{2}[/tex].

T = [tex]\frac{2 *6 Sin90^{o} }{9.8}[/tex]

  = [tex]\frac{12}{9.8}[/tex]

  = 1.2245

T = 1.23s

The ball's time in the air is 1.23s.

I am the energy of moving electrons and magnetic interactions. What type of energy am I?|
am the

Answers

Answer:

Electrical energy

Explanation:

Electrical energy deals with magnetism and moving electrons

Answer: you are electrical energy

Explanation:

Physics please help me.

Answers

Answer:

F = 780 [N]

Explanation:

To solve this problem we must use newton's second law which tells us that the sum of forces on a body must be equal to the product of mass by acceleration

ΣF =m*a

where:

F = force [N] (units of Newtons)

m = mass = 2600 [kg]

a = acceleration = 0.3 [m/s²]

F = 2600*0.3

F = 780 [N]

A robin flies a distance of 45963 cm. How far has it flown in kilometers?

Answers

Answer:

0.46km

Explanation:

45963cm/100cm=459.63m/1000m=0.45963 or 0.46km

what is the peacocks displacement from 2 to 3 seconds

Answers

1.5 second difference

A ball that is out of play is called a __________________. 2. Volleyballs are made out of __________________ material. 3. A __________________ occurs when the server steps on or over the end line. 4. Contact of the ball by a player is called __________________. 5. The __________________ decides who will serve and the choice of playing area.

Answers

Answer:

1) Deadball

2) Leather

3) Foot Fault

4) Pass

5) Captain

Explanation:

1) In most sports when a ball is out of play or termed temporarily unplayable, it is said to be a Deadball.

2) Volleyballs are generally made of leather materials be it synthetic or genuine leather.

3) In volleyball, when a server steps on or over the end line, it is called foot fault.

4) The first contact of a ball by a player after a serve from a passer is usually called a pass.

5) In volleyball, the referee issues a coin toss in presence of both captains and the captain with the winning toss is the one that makes the choice of play area and the first server.

A 2 kg mass moving along a horizontal surface at 10 m/s is acted upon by a 5 N force of
friction. Calculate the net force?

Answers

Answer:

F = 20.61 N

Explanation:

Given that,

Mass of the object, m = 2 kg

It is moving with a speed of 10 m/s

It is acted upon by a 5 N of friction.

The force of gravity acts in downward direction which is given by :

W = mg

W = 2 × 10 = 20 N

5 N of force is acting in horizonal surface.

The net force is given by the resultant of two vectors as follows :

[tex]F=\sqrt{20^2+5^2} \\\\=20.61\ N[/tex]

So, the net force acting on the object is 20.61 N.

The net force acting on the mass is equal to 13.6 Newton.

Given the following data:

Mass = 2 kgSpeed = 10 m/sForce of friction = 5 N

We know that the acceleration due to gravity (g) of an object on planet Earth is equal to 9.8 [tex]m/s^2[/tex].

To calculate the net force:

First of all, we would determine the normal force acting on the mass.

Mathematically, the normal force is given by the formula:

[tex]F_N = mg[/tex]

Where:

m is the mass of an object. g is the acceleration due to gravity.

Substituting the given parameters into the formula, we have;

[tex]F_N = 2 \times 9.8[/tex]

Normal force = 19.6 Newton

To find net force:

[tex]Net\;force = 19.6 - 5[/tex]

Net force = 13.6 Newton.

Note: We subtracted because friction opposes the motion of an object and as such acts in opposite direction.

Read more: https://brainly.com/question/19046878

if a car has traveled 24km in 2 hours, what is the average speed?

Answers

Answer:

12

Explanation:

----------------............

A jogger takes five minutes to run a distance of three kilometres. His speed, in metres per second, is approximately A) 5.5 M/S B) 10 M/S C) 36 M/S D) 4.5 M/S

Answers

Answer:

His speed, in metres per second, is approximately 10m/s. The correct option is B.

Explanation:

Speed is defined as the rate in which an object cover a distance in a given time. It is measured in meters per second ( m/s). From the question, the jogger covered a distance of 3Km which when converted to meter is 3000meters in a given time 5 minutes which is 300seconds. The calculation of his speed in meter per second is shown below:

Distance= 3Km to meters ( as 1000meters = 1Km). Therefore 3× 1000 = 3000m

Time= 5 minutes to seconds ( as 1 minute = 60 Seconds). Therefore 5× 60= 300.

Speed= distance/ time

= 3000/300

= 10m/s

Therefore his speed, in metres per second, is approximately 10.

The number of waves that pass a given point in a second is___.

1- amplitude
2- wavelength
3- frequency
4- wave speed

Answers

Answer:

Frequency

Explanation:

The frequency ( ) of a wave is the number of waves passing a point in a certain time.

A 1500 kg car starts from rest,
and rolls down a frictionless 5.09°
slope that is 17.5 m long. How
much time does it take to reach
the bottom?
(Unit = s)

Answers

The time taken for the heavy car to reach the bottom of the frictionless slope is 0.56 s.

Height of the slope

The height of the incline is calculated as follows;

sin θ = h/L

h = L sinθ

where;

L is length of slopeh is height of the slope

h = 17.5 x sin(5.09)

h = 1.55 m

Time of motion of the car

t = √(2h/g)

where;

t is time of motiong is acceleration due to gravity

t = √(2 x 1.55 /9.8)

t = 0.56 s

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Answer:

T=  6.34

Explanation:

This is the answer. This answer also works on acellus

How would you use a diet diary or nutrition log to evaluate your eating habits?

Answers

Answer:

to see how much you are getting of something

Explanation:

Answer:

I would use it to track everything nutrition wise.

Explanation:

I would use it to track everything nutrition wise. Meaning that if I do anything that is in the process of eating or consuming food, I would log it down. A good example of what goes in a dietary log would be how much you ate, the amount of calories you ate, and occasionally the amount of serving you ate based off the recommended serving size. It should be important to keep a fitness log if you are interested in keeping a diet diary; to  further track calories!

Hope this helps <3

Bird man is flying horizontally at a speed of 33m/s and a height of 86m. Bird man releases a turd directly above the start of the field. How far from the start of the field should the robot hold the bucket to catch the turd.

Answers

Answer:

2838

Explanation:

2. The word used to represent a chemical reaction is a/an a. Atom b. Formula O c. Equation d. Symbol​

Answers

Answer:

A formula I am pretty sure

Which of the following best describes a hypothesis?
O A. A question that scientists study
B. A possible answer to a scientific question
C. An explanation supported by many observations
O D. A list of scientific data

Answers

I am 99% sure it is B :)

Answer:

B. A possible answer to a scientific question

Explanation:

It's usually a possible or testable explanation made on the basis of limited evidence as a starting point for further investigation.

Someone in a car going past you at the speed of 32 m/s drops a small rock from a height of 2 m. How far from the point of the drop will the rock hit the ground? the acceleration due to gravity is 9.8m/s^2. answer in units of m.

Answers

Answer:

The rock will hit the ground at 20.44 m from the point of the drop

Explanation:

Horizontal Motion

It occurs when an object is thrown horizontally from a height h at an initial speed v.

The range or maximum horizontal distance traveled by the object can be calculated as follows:

[tex]\displaystyle d=v\cdot\sqrt{\frac {2h}{g}}[/tex]

When the small rock is dropped from a car at speed v=32 m/s, it starts a curved path that ends up when the rock hits the ground. The height is h=2 m, thus the range is:

[tex]\displaystyle d=32\cdot\sqrt{\frac {2\cdot 2}{9.8}}[/tex]

[tex]\displaystyle d=32\cdot\sqrt{0.4082}[/tex]

[tex]d=20.44\ m[/tex]

The rock will hit the ground at 20.44 m from the point of the drop

What is another example of convection?

(A) A heater in a fish tank the bottom of the tank

(B) Batteries in a flashlight converting chemical energy into light

(C) Touching a stove and burning your hand

(D) Warming up next to a fire on a cold night

Answers

Answer: The answer is c!

A heater in a fish tank warming the water at the bottom of the tank is an another example of convection.

What is convection of heat?

Convection, which is the extensive movement of molecules within gases and liquids, is the mechanism through which heat is transported. Although most of the heat transfer occurs as a result of fluid motion, conduction is initially employed to transfer heat from the item to the fluid.

As a result of material movement, heat is transmitted through fluids by convection.Both gases and liquids can contain it.It might be forced or organic.It is important to transfer part of the fluid in bulk.

Convection is therefore demonstrated by a heater in a fish tank warming the water at the tank's bottom.

Learn more about convection of heat here:

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know the types of peer pressure describe all of them​

Answers

Answer:

Spoken Peer Pressure

Positive Peer Pressure

Direct Peer Pressure

Negative Peer Pressure

Positive Peer Pressure

Unspoken Peer Pressure

Indirect Peer Pressure

Sorry this is all I know

Hope this Helps!

what can i do to recycle?

Answers

Answer:

You could throw away the following items:

Mixed paper: Newspaper, magazine, junk mail, cardboard, frozen food packaging, wrapping paper, paper bags, etc.

Cans: aluminum, foil, tin, steal, aerosol (empty without pressure) and metal food trays. ...

Unbroken glass: Wine bottles, bottles and jars.

Plastic: Rigid containers like milk jugs, shampoo or water bottles.

Hope this helped

If no work is done, the total energy is not changed. In that situation, if the kinetic energy changes, what must happen to the potential energy?

Answers

Answer:

the potential energy will also change

Explanation:

kinetic energy and potential energy are inversely proportional to each other, so if kinetic energy changes, potential energy will also change..

Which type of carbohydrate is the body unable to digest, but is still important for lowering cholesterol, balances glucose levels, and helps prevent overeating.

Answers

Answer:

Cellulose

Explanation:

Cellulose is the carbohydrate which is unable to be digested by body. Adding fiber's (cellulose)  to one's diet reduces blood cholesterol level because soluble fiber  dissolves in water to form a gel, which moves slowly through the intestines binding up fat, dietary cholesterol, bile salts, and sugar to be excreted. Once excreted, these are no longer available to build more cholesterol. Also cellulose remains undigested but is effectively making one gain more calories, so it helps prevents over eating.

Where are alkaline earth metals found on the periodic table? Group 1 Group 2 Groups 3–12 Group 17'

Answers

Answer:

B- Group 2...  It says my answer is too short so how ya'll doing today?

At which point does the image appear?
W
X
Y
Z

Answers

Z I think...........
Z I think.....................

A small chunk of wax floats if placed in water. If huge piece of wax that is as heavy as a
car, is placed in water, it will

Answers

The wax would float because of its weight

Click to review the online content. Then answer the question(s) below, using complete sentences. Scroll down to view additional questions.
Online Content: Site 1
Fitness Log

What are the advantages of strength exercises? (Site 1)

Answers

Strength training may help you control or lose weight. Strength exercise boosts your metabolism and burns more calories.

What is a strength exercise?

Strength training is essential for increasing flexibility, mobility, performance, and injury prevention. you don't need to spend hours at the gym to see results.

In the comfort of your own home, we'll teach you the fundamentals of strength training. A full-body strength-building workout will take only nine minutes of effort. Grab a towel and prepare to feel powerful.

The advantages of strength exercises will be as follows;

1. Strength training may help you control or lose weight,

2. Strength exercise boosts your metabolism and burns more calories.

3. Improve your quality of life and your capacity to do daily tasks.

4. Strength exercise can also help to keep your joints healthy.

Hence strength training may help you control or lose weight. Strength exercise boosts your metabolism and burns more calories.

To learn more about the strength exercise refer to the link;

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Answer:

Other one is wrong, this one I got 100% on.

Explanation:

Protection – Protect the wounded area with a support or something similar. this means after an injury has happened, use tools or simple objects to cover and protect the injury so nothing else can harm or get into the injury.

Rest – Do not continue to exercise while your wound is healing. It may take a few weeks or months to recover. You may need crutches or a sling. This means take the time to give your body the rest and relaxation it needs in order to be strong and healthy again.

Ice – Wrap a bag of ice or a bag of frozen peas in a towel and apply it to the wounded area for 15–20 minutes every two to three hours. As it states, ice can help recover an injury or make the swelling and pain go away, this will also help you stay relaxed and calm

Compression – Apply elastic compression bandages to the wounded area during the day to reduce swelling. Compression greatly helps stop any blood or fluid from leaving the body, using the compression method closes an open wound and uses pressure to keep the wound closed

Elevation – Make sure the injured body part is elevated above the height of your heart as much as possible to help reduce swelling. This is also important, elevation helps keep swelling down and help keeps unwanted blood out of the wound

GIVING THE REST OF MY POINTS!
Energy can be:
A. destroyed or converted to another form.
B. destroyed.
C. created, but never destroyed.
D. converted to another form.

Answers

the answer isssssss D

A car’s velocity changes from 35 m/s to stopped in 13 seconds. Calculate
acceleration.

Answers

To find acceleration you use the formula velocity divided by change in time, so if you do this you would get 2.7 rounded but I don’t know if this is correct. 35/13=2.692
Other Questions
Read the paragraph.Violence in video games is essentially to blame forviolence in our society. When children are bombardedwith monstrous images, they begin to think that thesetypes of actions are normal or acceptable. Children andteenagers are spending excessive numbers of hoursplaying video games, and they may begin to use themas a guideline for how to act and behave. Even if theydo not perform violent actions, they may become lesssensitive to the thoughts and feelings of othersbecause of what they see reflected in these games.Which phrase best explains the kind of words the writeruses to affect the reader?mainly words with strong positive connotationsO mainly words with strong negative connotationsO mainly words with neutral and positive connotationsO mainly words with positive and negativeconnotations If person B kills person C because person A says " if person b doesn't kill person C then person A will kill person B and his/her WHOLE FAMILY" , and person B kills person C, will person B be charged with murder or person A? Choose a system of equations with the same solution as the following system:6x + 2y = 63x 4y = 18a) 8x + 4y = 417x + 2y = 28 b)12x + 4y = 1221x + 2y = 36c) 6x + 8y = 3615x + 6y = 60 d)6x + y = 1515x y = 9 PLS HELP!! ANSWER THE ONES U KNOW PLEASE!! IM REPOSTING THIS!!Directions: Use the textbook and your notes to identify which individual said the quotes below.5. I wrote, The Crisis to rekindle patriotic spirit during difficult times and Common Sense, to challenge the loyalists and neutralists to fight for independence from Great Britain.6. I was an early advocate for womens rights and wanted women to have rights during a time when they werent seen as equals. I wrote a letter to my husband, John Adams that encouraged him and his fellow patriots to remember the ladies as they fought for freedom.7. I was an old man during the Revolution and couldnt fight for the Patriots. However, I continued to serve the Patriot cause by traveling to France to try to gather support for the Patriots. I also helped negotiate the Treaty of Paris 1793, which officially ended the American Revolution.8. I was an African American Patriot leader from New Hampshire during the Revolution. In a ride similar to Paul Reveres, I warned the people of New Hampshire of British advancements. After the war, I became one of the first black men elected to a political position in the United States.9. I was on my way to work at the docks when shots began to ring out. I was one of the first to die in the conflict between British and colonists in 1773.10. A good friend of Abigail Adams, I was also an advocate for womens rights. Both my husband and my brother were very active in the Patriot movement. I wrote extensively in support of the Patriot cause and published plays and other pieces anonymously, which convinced many to support independence.11. I was the leader of the Sons of Liberty who believed there should be no taxation without representation.12. I was a French nobleman who joined the Patriots fight for freedom. I spent the winter at Valley Forge with General Washington and his men. 1. Como de Han formado los generos musicales cubanos? The act of repeating a shape, object, color, or line is called ___________.formintensityproportionrepetition Which one of these is not a strength of the Articles of Confederation?Passed the Northwest OrdinanceEstablished the postal serviceHad a strong governmentCongress could sign treaties help will mark brainliest if correct :) Add, subtract, multiply or divide all for of these numbers to get a result equal or close to 51.Numbers: 7, 8, 5, 6You cannot add any new numbers. Please help i've been stuck on this for an hour now. :( Find the probability of guessing correctly at least 6 of the 10 answers on a true-false examination. Solve for bbb. Reduce any fractions to lowest terms. Don't round your answer, and don't use mixed fractions. 30b+53 \geq 18b -8330b+5318b8330, b, plus, 53, is greater than or equal to, 18, b, minus, 83 What is the 100th term of the sequence with a1 = 222 and d = -5 Why does Shakespeare encourage sympathy for lady macbeth's sleepwalking and her wrestlings with guilt? Please help me answer 25. Please 6th grade pre teacher ED i mark as brainliest Both Jewish and Gentile Christians were called upon to make some radical changes. Which of thesestatements describe some of those changes?Jews must now view Gentiles as their equals in the Kingdom of God.Gentiles now accept the revelation of God in Scripture, not in human reason.Gentiles now view God as sovereign, not man.Jews were no longer required to observe their ceremonial laws.Gentiles now believe in one true God.Gentiles must accept that nature is a force in and of itself. Is 4 x 2/3 greater than 4? The aurthor uses paragraph 1 to? the passage is Excerpt from Mounds of History Find the value of x in each pair of similar figures. Use proportions to solve. explica el titulo de esta obra por que se llama la odisea