Answer:
Explanation:
Given
Initial velocity of ball
height of window
Using Equation of motion
where u=initial velocity
t=time
a=acceleration
As ball is already is at a height of 20 m so
(b)highest point is obtained at v=0
where
v=final velocity
u=initial velocity
a=acceleration
s=displacement
Highest Point will be
(c)Time taken when the ball hit the ground i.e. at Y=0
impact velocity
25 x 10^-5
= 0.00025
25 cm
= 0.00025 km
Answer:
B. Motion and Friction
Explanation:
The car is moving which is a form of motion and friction because the car is skidding which i think causes friction.
Answer:
F₁₋₂ = 1.036*10⁻⁵ [N]
Explanation:
In order to solve this problem, we must use the law of universal gravitation, which can be defined by means of the following expression.
where:
F₁₋₂ = Force among the two bodies [N]
G = Universal gravity constant = 6.67 *10⁻¹¹ [N*m²/kg²]
m₁ = mass of the first body = 3.5*10 [kg]
m₂ = mass of the second body = 3*10¹² [kg]
d = separation distance = 26000 [m]
Now replacing:
Hi!
The answer would be ~ 3.58
<h3>Explanation</h3>
You will need to use the simple formula of finding the number of moles, given the mass of the compound, which is:
number of moles of compound = mass of compound / Mr of compound
The mass in this equation is the mass of the compound you have/ are considering.
The Mr is the sum of the atomic masses of each element in the compound.
<u><em>To proceed with this, you need to have two of the following values:</em></u>
Mass : 340g
Mr of MgCl2 : 95
Number of moles : ?
<u><em>Substituting the respective values in the equation:</em></u>
number of moles = mass / Mr
number of moles = 340 / 95
number of moles = 3.58
Hope this helps!