If Calcium has 2 valence electrons and Chlorine has 7 valence electrons, how many Cl-1 ions would need to combine with 1 Ca+2 io
1 answer:
You might be interested in
1) The landing spot of the projectile is given by
2) The common variable is the time
Explanation:
1)
The motion of a projectile consists of two independent motions:
- A uniform motion (constant velocity) along the horizontal direction
- A uniformly accelerated motion, with constant acceleration (acceleration of gravity) in the downward direction
The landing spot can be determined in the following way:
- First of all, we analyze the vertical motion to find the time of flight of the projectile. This can be done by using the suvat equation
where
h is the vertical displacement of the projectile, which corresponds to the height from which the projectile has been fired, above the ground
u = 0 is the initial vertical velocity
is the acceleration of gravity
t is the time of flight
Solving for t,
- After finding the time of flight, we analyze the horizontal motion, which is a uniform motion with constant horizontal velocity . Therefore, the horizontal distance covered is given by
And substituting the time of flight,
2)
Since the horizontal motion is uniform, the horizontal component of the displacement of the projectile is given by
where is the horizontal velocity and t is the time.
The vertical motion is accelerated, so the vertical component of the displacement is given by
where g is the acceleration of gravity and t is the time.
Therefore, from the two equations we see that the common variable is t, the time.
Learn more about projectile:
#LearnwithBrainly
Answer:
1. Lead
2. Aluminum
3. Wood
4. Styrofoam
Explanation:
Specific gravity is a quantity that tells me how much an object is submerged on a fluid relating the densities:
Because all the cubes are placed on water, the density of the fluid is the same for all the cubes and S.G. is directly proportional to the density of the cube material. So, for greater density greater S.G.
The Archimedes principle states that the buoyant force is equal to the weight of water displaced, that is:
So, the cube that submerges more is the cube that mor displace water and is the cube that has more buoyant force on it. In other words, the cubes with higher S.G. have more buoyant force, and because S.G is proportional to cube density, the cubes with more buoyant force have more density.