Red blood cells is correct
primarily ionic include = sodium iodide( NaI) , calcium chloride ( CaCl2)
primarily covalent include - Ammonia (NH3) , Methane ( CH4) and
Glucose (C6H12O6)
Explanation
ionic bond is formed when there is complete transfer of electron between atoms. It occur between metal which donate electrons and a non metal which accept electrons.
for example in formation of CaCl2, ca donate 2 electron to 2 Cl atom, while 2 Cl atom accept the 2 electrons to form ionic bond.
Covalent bond is formed when two or more non metal form bond by sharing electrons pairs.
For example in NH3 3 pairs of electron are shared. to form covalent bond.
Answer:either satellite tracking or probware.
Explanation:probate. Think its satalite tracking hope this helps.
Answer:
First molecule: <em>Heptane</em><em>.</em>
Second molecule: <em>2</em><em>-</em><em>methylh</em>exane.
Third molecule: <em>But-2-ene</em><em>.</em>
Fourth molecule: <em>Benzene</em><em>.</em>
Answer: Friction (Fk) = 46.2N.
Explanation: In the attachment, there is the drawing of the forces acting on the skiing person. As the person is in movement, the formula to calculate the friction is Fk = μk.N, where μk is the coefficient of kinetic friction and N is normal force. Normal force is the force necessary to keep a person "above" the ground. To find the normal force as suggested, we use the representation of the forces in the attachment. With it, it's shown that to calculate N:
cos 15° = 
N = Fg·cos 15°
N = 608·(-0.76)
N = - 461.9N
Now, with N and knowing the coefficient, which can be found in Physics Text Books and it is 0.1, we have:
Fk = 0.1·(-461.9)
Fk = - 46.2N
The friction is negative because it is pointing to the opposite side of the reference.
