Answer:
The magnitude of the vertical component of its velocity as it hits the ground is 30 m/s. The horizontal distance from the firing point is 750 meters.
Answer: You should aim at an above point.
Explanation:
The light when it goes from the air to a densier substance as water suffers the effect called refraction in which the relative angle of incidence is different, in general, from the refracted one, as shown in the picture. Since water has greater density than air, then the refracted angle is smaller than the incident angle of the light beam, then to reach the actual location of the object from outside de pool it is necessary to aim a little above the real location, so that the light reaches it.
Answer:
If you are asking for the answer with the highest molar mass, then the answer is B.
B. Fe₂O₃
Answer: heat
Explanation: An increase in the temperature of a liquid causes an increase in the average speed of its molecules. As the temperature of a liquid increases, the molecules move faster thereby increasing the liquids kinetic energy.
Answer:
B. 7
Explanation:
Fluorine has 7 valence electrons in its orbitals.
The valence electrons are electrons in the outermost shell of an atom. Every element has a certain amount of valence electrons.
- Fluorine belongs to the 7 - group on the periodic table.
- Every element in this group has 7 electrons in their outermost shell.
- The elements in the group are called halogens.
- Other elements in this group are fluorine, chlorine, bromine, iodine and astatine.