Answer:
d- Scientists have to follow government rules made to protect people.
Explanation:
Scientific research fosters our understanding of the world around us. It helps people to learn to promote critical thought and problem-solving. Although there may not be an immediate practical use of the research, in the long term the study could benefit humanity. Scientific research is the product of creative ideas and collaborative communication that the proper role of government is often restricted to funding the research. The role of the government is to perform its reasonable and valid duties of defending human rights and enhancing the independence of the human.
Membranes are barriers and “gatekeepers”, they only let certain molecules pass through them.
they also transport nutrients to the cell
Metals are all in the center of the periodic table and are all made up of metals
Answer:
The atomic number of an element is the number of protons found in the nucleus of every atom of that element. Atomic number and is used to distinguish one element from another . The number of protons define the identity of an element (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present).
While, Mass number (atomic mass number or nucleon number), is the total number of protons and neutrons in an atomic nucleus. It is said to be approximately equal to the atomic mass of the atom expressed in atomic mass units.
Explanation:
In simple words ;
mass number = protons + neutrons
Atomic number = no of protons
To determine the voltage of the battery above, we use Ohm's Law which relates voltage (V), current (I) and resistance (R) in a circuit. It is expressed as V = IR. We calculate as follows:
V = IR
V = .43 A ( 3.5 ohms )
V = 1.505 V
Therefore, the correct answer is option A.