Answer:
you must throw 3 snowballs
Explanation:
We can solve this exercise using the concepts of conservation of the moment, let's define the system as formed by the refrigerator and all the snowballs. Let's write the moment
Initial. Before bumping that refrigerator
p₀ = n m v₀
Where n is the snowball number
Final. When the refrigerator moves
pf = (n m + M) v
The moment is preserved because the forces during the crash are internal
n m v₀ = (n m + M) v
n m (v₀ - v) = M v
n = M/m v/(vo-v)
Let's look for the initial velocity of the balls, suppose the person throws them with the maximum force if it slides in the snow (F = 100N), let's use the second law and Newton
F = m a
a = F / m
The distance the ball travels from zero speed to maximum speed is the extension of the arm (x = 1 m), let's look kinematically for the speed of the balls when leaving the arm
v₁² = v₀² + 2 a x
v₁² = 0+ 2 (100/1) 1
v₁ = 14.14 m / s
This is the initial speed for the crash
v₀ = v = 14.14 m / s
Let's calculate
n = M/m v/ (v₀-v)
n = 10/1 3 / (14.14 -3)
n = 2.7 balls
you must throw 3 snowballs
Answer:
kJ/mol
Explanation:
= initial vapor pressure = 45.77 mm Hg
= final vapor pressure = 193.1 mm Hg
= initial temperature = 213.1 K
= final temperature = 243.7 K
= Heat of vaporization
Using the equation
J/mol
kJ/mol
Answer:
Explanation:
Apply Faraday's Newmann Lenz law to determine the induced emf in the loop:
where:
variation of the magnetic flux
is the variation of time
#The magnetic flux through the coil is expressed as:
Where:
N- number of circular loops
A-is the Area of each loop(
)
B-is the magnetic strength of the field.
- is the angle between the direction of the magnetic field and the normal to the area of the coil.
=0.0250T/s is given as rate at which the magnetic field increases.
#Substitute in the emf equation:
Hence, the induced emf is
Answer:
i am answering the same question 3rd time
please find the answer in the images attached.
Force, newtons 3rd law of motion stated for every action there is an equal and opposite reaction
