Answer:
The answer is “They supported the use of radioactive elements for medical diagnostic purposes”.
Answer:
They supported the use of radioactive elements for medical diagnostic purposes.
Explanation:
(Its a recorded fact)
Which of the following are used to determine whether a substance is an acid or a base? (select all that apply)
orange juice
litmus paper
universal indicator
water
You notice after you walk across a room, you feel a spark when you touch the doorknob. What energy transformation must have taken place?
Choices Are:
-Thermal to Radiant
-Mechanical to Electrical
-Radiant to Mechanical
Answer:
Thermal to Radiant
Explanation:
9 Dr. Garcia is performing an experiment to see how cell division in flies is affected by the addition of a certain protein, called protein W, into a cell's cytoplasm. She has found that adding protein W to a cell drastically reduces the chances of the cell becoming cancerous. For protein W to be developed into a cancer treatment, what comparison should she make?
Answer:
The fly cells must be compared with human cells
Explanation:
Dr. Gracia's aim is the development of a potential cancer treatment. Remember that the treatment is meant for human beings.
Usually, the pre-clinical trials of the treatment is carried out on other organisms and the success rate is evaluated before trial on humans.
If protein W has been effective on flies, its effect on human cells should also be diligently compared before conclusions are drawn regarding the therapeutic effects of protein W.
How many protons does Na have?
Answer:
11 protons
Explanation:
Answer:
11 protons
Explanation:
since it is neutral it has 11 electrons as well
4. This is a diagram of a sol texture triangle. Farmers can use this chart to identify the type of soil found on their land and determine the likelihood of erosion and other important factors. What type of soil does a farmer have if the soil contains 40% sand, 40 silt, and 20% clay?
Type of soil : Loam
Further explanationA mixture is a combination of two or more single substances. The properties of the mixture component are not lost / unchanged as in compounds.
The mixture can be divided into a homogeneous mixture if the composition/ ratio of each substance in the mixture is the same and a heterogeneous mixture if the ratio of the composition of the substances is not the same (can be varied) in each place.
Soil is part of a mixture that has a different composition
To find the type of soil, we just need to draw a line of intersection between the 3 compositions shown
So the soil contains 40% sand, 40 silt, and 20% clay : Loam
What is the comversion factor used when converting mass to moles?
A. 6.02 x10 particles = 1 mole
B. 22.4L = 1 mole
C. the answer is not listed
D. molar mass = 1 mole
Answer:
6.02 x 10^23 particles = 1 mole
Explanation:
If A. has 10 to the power of 23 then that is the answer, but if it does not, then the answer is C.
The function of the nervous system is to A) help protect the body from disease. B) bring oxygen, nutrients and hormones to cells. C) control growth, development, metabolism and reproduction. D) coordinate the body's response to changes in its environment.
Answer:
D is correct.
Explanation:
How many atoms are in 4.67 moles of lead ?
Answer:
i believe the answer is 2.812
Explanation:
how does resistance change with temperature? is there more resistance or less resistance at higher temperatures?
Answer:
resistance becomes lower at higher temperatures.
Explanation:
molecules expand instead of compact
What particle is emitted during the following transmutation:
6729Cu→6730Zn+
____?
A.beta particle,
0−1e
B.
positron,
01e
C.alpha particle,
42He
D.gamma particle,
00γ
Answer:
A beta particle, = ₋₁⁰e
Explanation:
Alpha beta and gamma radiations are the examples of ionizing radiations.
Beta radiations are result from the beta decay in which electron is ejected. The neutron inside of the nucleus converted into the proton an thus emit the electron which is called β particle.
Properties of beta radiations:
The mass of beta particle is smaller than the alpha particles.
They can travel in air in few meter distance.
These radiations can penetrate into the human skin.
The sheet of aluminum is used to block the beta radiation
⁶⁷₂₉Cu → ⁶⁷₃₀Zn + ⁰₋₁e
The beta radiations are emitted in this reaction. The one electron is ejected and neutron is converted into proton.