Question 9
After 60 days, 100g of a certain element has decayed to only 12.5g.
What is the half-life of this element?
A.) 20 days
B.) 30 days
с.) 8 days
D.)5 days

Answers

Answer 1
30 days I think because I am not so sure

Related Questions

True or False: The lower layers of the atmosphere contain greenhouse gases that trap heat near the Earth keeping everything at a relatively stable temperature compared to space.
O True
O False​

Answers

Answer: True

Explanation:

Select the correct answer. Which of the following is true for balancing equations? A. The number of products should be equal to the number of reactants. B. The properties of products should be the same as the properties of reactants. C. There must be as equal number of compounds on both sides of the equation. D. There must be as equal number of atoms of each element on both sides of the equation.

Answers

D is the correct answer to your question

Answer:

d

Explanation:

A 52-year-old woman has difficulty initiating voluntary movements. She can clearly state what she intends to do, describe exactly how she would do it, and picture herself doing it easily. When she is able to begin the motion, she can complete it smoothly and accurately, but she has difficulty beginning the motion. If the difficulty arises from a defect in one particular area of the nervous system, which area is most likely to be involved

Answers

Answer:

Basal Ganglia

Explanation:

The Basal ganglia function is to regulate the voluntary movements or autonomic movement. This is done by receiving and transmission of impulses. Impulses are received for upcoming movement from the cerebral cortex and then process and adjust from where it is convey to the thalamus which then relays this information back to the cortex. The well defined movement instruction is finally sent to the skeletal muscles through the tracts of the pyramidal motor system. It also function in planning and modulation of movement, memory and eye movement.

There are five types of basal ganglia corpus striatum, claustrum, amygdala, substantia nigra and subthalamic sails which all function together.

What are three of the products whales are hunted for by the whalers and their substitute products?

Answers

I know that they are hunted with Whale oil

GIVING BRAINLIEST!!!!!!

The brain sends signals to the rest of the body so that our bodies do what is needed to survive. Explain what the brain tells your body to do if you touch a hot object with your hand.

A) Move your hand away
B) Pump less blood to your hand
C) Slow down your heart rate

Answers

Answer:

A

Explanation: I got it correct on a quiz I did that had this question

Move your hand away. Therefore, option (C) is correct.

What is reflex arc?

A reflex arc is a neural pathway that mediates a reflex action. It is a rapid and automatic response to a specific stimulus that does not require conscious thought or decision-making from the brain. When a sensory receptor in the body, such as the skin or muscles, is stimulated, a nerve impulse is transmitted to the spinal cord, where it is processed by an interneuron.

The interneuron then sends a signal through a motor neuron to the effector, such as a muscle, causing a rapid and involuntary response, such as pulling your hand away from a hot stove. This entire process occurs without conscious control from the brain, allowing for quick and protective responses to potentially harmful stimuli.

Learn more about reflex arc, here:

https://brainly.com/question/29727145

#SPJ3

Which is a compound composed of carbon, hydrogen, and oxygen in a ratio of one oxygen and two hydrogen atoms for each carbon atom?

Answers

carbohydrates is what a compound composed of carbon, hydrogen, and oxygen in a ratio of one oxygen and two hydrogen atoms for each carbon atom is.

How do animals help recycle carbon atoms?

Answers

Answer:

animals, oxygen combines with food in the cells to produce energy for daily activity and then gives off carbon. The carbon combines with oxygen to form carbon dioxide (CO2) and is released back into the atmosphere as a waste product when animals breathe and exhale

Answer:

In animals, oxygen combines with food in the cells to produce energy for daily activity and then gives off carbon. The carbon combines with oxygen to form carbon dioxide (CO2) and is released back into the atmosphere as a waste product when animals breathe and exhale.

Explanation:

Blood leaves the heart to go to the rest of
the body through the

Answers

Answer:

arteries

Explanation:

goes back through veins

Answer:

blood leaves the heart to go to the rest of the body through the aorta which is the main Artery carrying oxygenated blood

How are traits
removed from
the gene pool?

A. Organisms with less desirable traits do not reproduce

B. Organisms with less desirable traits reproduce the most

Answers


A. Organisms with less desirable traits do not reproduce
is the answer

Many scientists are worried that the increased amount of carbon dioxide in Earth's atmosphere will _____

A. make it harder for animals to breathe

B. use up all our fossil fuels

c. cause Earth to warm up unnaturally

D. make green plants grow too fast

Answers

The answer will be C. Cause Earth to warm up unnaturally


Explanation: the more carbon dioxide in the atmosphere, the hotter the earth will become. Changing the earths climate

Which series is arranged in order from largest to smallest in size?

Answers

Definition cell, nucleus, chromosome, DNA, nucleotide

Which ACTN3 genotype (RR, RX, or XX) would provide these Olympic marathon athletes with an advantage, and why?

Answers

Answer:

XX

Explanation:

ACTN3 genotype i.e. XX provides advantage to the Olympic marathon athletes because it strengthens the fiber of the muscles. This gene is also called the gene of speed. This ACTN3 gene has a great influence on the type of fiber that makes body muscles, and they are also linked to strength and endurance so we can conclude that this gene provides benefits to the Olympic marathon athletes by giving strength to the fiber of muscles.

ACTN3 genotype is the gene encoding for the actinin of the skeletal muscle fibres.  XX of the ACTN3 genotype will be advantageous for marathon athletes.

What is ACTN3 genotype and XX?

ACTN3 genotype is the gene encoding for the protein of the skeletal muscles fibres that are associated with muscular performance.  This protein is expressed in the myofibers with a high twitching ability and result in a high-velocity force.

The XX genotype provides strength to the muscles and is the gene coding for the proteins that give speed. They are also responsible for endurance and are beneficial for athletes.

Therefore, XX of the ACTN3 genotype is advantageous for athletes.

Learn more about ACTN3 genotype here:

https://brainly.com/question/25199454

6. Which of the following is true during telophase?
a. The nuclear membrane has disappeared.
b. The cell membrane begins to form cleavage furrow at the center.
C. Two new cells are formed with the same number of chromosomes as the parent cell.
d. The centromere of each chromosome divides and pulls them by the spindle fibers toward
the end of the cell.

Answers

Explanation:

what is the name of this website or the book

Which of the following is a form of ethnic segregation that persists in the
United States?
A. Immigrants are required to live together until they have become
naturalized citizens.
B. A federal law requires ethnic groups to live together until they
learn to speak English.
OC. Many American Indians still live on reservations where their tribes
had been relocated by force.
O D. Strong leaders encourage their followers to live together so that
they can control them more easily.

Answers

Answer:

C. Many American Indians still live on reservations where their tribes had been relocated by force.

Explanation:

Given that ethnic segregation has to do with the artificial separation of various people of different socio-cultural backgrounds.

Hence, the ethnic segregation that persists in the United States can be attributed to "Many American Indians still live on reservations where their tribes had been relocated by force."

Answer:

C. Many American Indians still live on reservations where their tribes

had been relocated by force.

Explanation:

Bacteria Natural Selection

Answers

Answer:

Bacterial resistance arises through the simple process of natural selection. Bacteria divide rapidly, but DNA replication is imperfect. In the presence of antibiotics, while most bacteria are killed, a small number of resistant mutants may survive and take over.

Explanation:

When bacteria are initially exposed to an antibiotic, those most susceptible to the antibiotic will die quickly, leaving any surviving bacteria to pass on their resistant features

Name the carbohydrate which forms cell wall​

Answers

Answer:

Cellulose

hope this answer helps you...

(10 points)
The diagrams below show some changes in an
environment over time.
(A)
(B)
(C)
Which phrase best describes this sequence of
diagrams?
(1) the path of energy through a food web in a
natural community
(2) the altering of an ecosystem by a natural
disaster
(3) natural communities replacing each other in
an orderly sequence
(4) similarities between an aquatic ecosystem
and a terrestrial ecosystem
(D)
r

Answers

Answer:

The correct answer is - (3) natural communities replacing each other in an orderly sequence

Explanation:

In this diagram, there is ecological succession occurred, the process of the new natural community over the older natural community in an orderly sequences.

In this case, there are change from an aquatic ecosystem to new land ecosystem by changing various biotc and abiotic factors. The ecosystem go through various changes and physical changes.

Which organelle converts energy from nutrients?
A. Ribosome
B. Vacuole
C. Nuclues
D. Mitochondria


HELP ME PLEASE

Answers

Answer:

ç.

Explanation:

please click the heart and rate excellent and brainleist to

Other Questions
Pls helpppp and thank you At the pet fair, Darlenes dogweighed 5 times as many poundsas Leahs dog. Together, the dogsweighed 60 pounds.How many pounds does Leahsdog weigh? Who was Robert McNamara? What does this equal to |9-14| Point B has coordinates (1,2). The x-coordinate of point Ais - 11. The distance between point A andpoint B is 13 units. What are the possible coordinates of point A? How might the agriculture have caused or led to the industrial revolution?2 sentences please.Ill mark you brainliest Beyond standard benefits like vacation time, sick leave, and healthinsurance, what do you think a business could offer that would makea potential employee want to work there over a rival company?Explain your answer. Andrea constructed a triangle. Angle 1 and 3 are the same size and angle 2 has a measurement of 70 degrees. What is the measurement of angle 1 and 3 Give Brainliest for the correct Answer 50 points 5. Explain the effect of comparing the end of Plessyv. Ferguson to a death (Paragraph 2)? Citeevidence from the text in your response.PLEASE HELP ME why the chicken wing was a good model to use to explore bone and muscle structures Factor the expression 10x + 25A. 2(5x + 10)B. 5(2x + 5)C. 10(x + 5)D. 5(2x + 25) Drag the operations signs to make the number sentence true. Use each operation sign once. + 4 (3 2) 6 1 = 14 Thecontrols our voluntary actions?Autonomic nervous systemLimbic systemParasympathetic nervous systemSomatic nervous system 3-6 x (34 divided by 30)2 Which of the following is a form of ethnic segregation that persists in theUnited States?A. Immigrants are required to live together until they have becomenaturalized citizens.B. A federal law requires ethnic groups to live together until theylearn to speak English.OC. Many American Indians still live on reservations where their tribeshad been relocated by force.O D. Strong leaders encourage their followers to live together so that they can control them more easily. PLEASE HELP ME AND DONT POST ME VORTEX OR SPAMA) Das ist _____ Englischraum. Klasse, oder? Wir lernen hier Englisch, Deutsch undSpanisch.1) unser 2) ein 3) unsereb) Sehr nett. Wir haben _____ Sprachlabor. Wir haben Englisch in dem Klassenzimmer.1) keinen 2) keine 3) keinc) Und hier ist _____ Chemieraum.1) unsere 2) der 3) eind) Wir machen hier _____ Experimente. Das macht Spa.1) eine 2) unser 3) -e) Habt ihr auch _____ Physikraum?1) ein 2) unseren 3) einenf) Nein, es gibt _____ Physiklabor.1) - 2) kein 3) keineng) A: Und wo sind wir jetzt?B: Nett, oder? Hier gibt es _____ Bibliothek.1) der 2) unser 3) unsereh) A: Und wo habt ihr Musik?B: Hier ist _____ Musikraum. Wir singen hier und spielen Instrumente.1) unsere 2) der 3) diei) A: Habt ihr _____ Schulmensa?1) ein 2) - 3) eineB: Ja. Wir essen hier zu Mittag.j) Und das ist _____ Sporthalle. Wir spielen hier1) eine 2) unsere 3) unserk) Hier sind wir in _____ Lehrerzimmer.1) der 2) dem 3) einl) Das ist _____ Bro des Direktors.1) ein 2) das 3) diem) Und hier sind wir zurck in _____ Halle.1) der 2) dem 3) unser why does the quadratic formula work all the time Please help me with this 67 is 42% of what number?