Vf = final velocity
Vi = initial velocity
g = acceleration due to gravity
t = time
Vf = Vi + gt
Vf = 0 + (9.8)(7.80)
Vf = 76.44 m/s
Answer:
Area of the rectangular field in kilometers is 0.09
Explanation:
We know that 1 kilometers = 1000 meters
since we need to find the area in unit of kilometers
therefore converting length and width into kilometers
1000 meters = 1 kilometers
300 meters =
Likewise width = 0.3 km
Area = length x width
= 0.3km x 0.3 km
= 0.09
D. Electrons are shared between the bromine atoms and carbon atoms
Answer:
r =
Explanation:
Let's apply the universal gravitation law to the body (c), we use the indications 1 for the planet and 2 for the moon
∑ F = 0
-F_{1c} + F_{2c} = 0
F_{1c} = F_{2c}
let's write the force equations
where d is the distance between the planet and the moon.
(d-r)² =
d² - 2rd + r² = \frac{m}{M} \ \ r^2
d² - 2rd + r² (1 - ) = 0
(1 - ) r² - 2d r + d² = 0
we solve the second degree equation
r = [2d ± ] / 2 (1- )
r = [2d ± 2d ] / 2d (1- )
r =
there are two points for which the gravitational force is zero
Since the cation (A) has a charge twice in magnitude than that of the anion (X), you can say the magnitude of the charge of the cation is 2c, while the magnitude of the charge of the anion is c.
Also remember that cations are positive ions, so the charge would be +2c, and that anions are negative ions, so the charge would be -c.
A binary ionic compound of A and X would have to have a net charge of zero. If A has a +2c charge, you would need two X anions to balance out every A cation, so the formula would be:
The simplest formula would be
.