Answer:
v = 7.9 m/s
Explanation:
length of the vine (L) = 20 m
initial angle with the vertical = 45 degrees
final angle with the vertical = 30 degrees
acceleration due to gravity (g) = 9.8 m/s^{2}
speed (v) =?
to solve this problem we can apply the equation below:
loss in potential energy = gain in kinetic energy
m x g x h = 1/2 x m x
v =
before we can apply the above we need to get our height
height = initial vertical height - final vertical height
height = (L - L cosθ2) - (L - L cosθ1)
height = (20 - 20cos45) - (20 - 20cos30) = 3.2 m
v =
v = 7.9 m/s
You first subtract the speed at which the man is moving (11 m/s) from the rate the boat is moving (12.4 m/s). Which equals 1.4, then divide it by 6 meters, as the man is moving relative to the boat.
It therefore equals 4.29 s
Answer:
a) per day
b)
c)
Explanation:
Given;
coefficient of performance of the refrigerator,
energy used per year of operation of the refrigerator,
a)
Energy used in single day:
per day
b)
Energy removed from the refrigerator in a single day:
We have the energy consumed in 1 day as,
so,
The desired effect of a refrigerator is to eliminate heat from the evaporator.
c)
Now the maximum mass of water that can freeze form 19.6°C:
where:
<span>The correct answer for the question that is being presented above is this one: "Karl Kraus meant the word 'thought' is that from action, it is not that easy to convert what we do into what we think. We have that tendency always that what we usually do is easier to think.</span>
The relationship between gravitational force and distance of separation is an "inverse relationship".
<u>Explanation:</u>
Gravitational force has been explained by "Newton's Universal Law of Gravitation" which says "In this universe every single particle attract every other particle with a force which directly proportional to the product of their masses while inversely proportional to the square of the distance in between them".
The gravitational force is inversely proportional to square of distance because as the distance between the objects with masses increases the force decreases. The gravitational force between any two objects with masses can be understood by given formula:
Here the F is gravitational force,
G is the gravitational constant =
are the masses of the two objects
d is the distance between two objects.