Given:
Water, 2 kilograms
T1 = 20 degrees Celsius, T2 = 100
degrees Celsius.
Required:
Heat produced
Solution:
Q (heat) = nRT = nR(T2 = T1)
Q (heat) = 2 kilograms (4.184 kiloJoules
per kilogram Celsius) (100 degrees Celsius – 20 degrees Celsius)
<u>Q (heat) = 669.42 Joules
</u>This is the amount of heat
produced in boiling 2 kg of water.
Answer:
a
t = 1.235 s
b
c
Explanation:
From the question we are told that
The initial velocity is
The take of height is
The negative sign show that the height is on the negative y-axis when the take off point is consider as the origin
Generally from the kinematic equation we have that
=>
Here g is negative given that the swimmers jump motion is against gravity
solving using quadratic formula we obtain that
t = 1.235 s
Generally the highest point is mathematically evaluated as
Here v = 0 m/s since the velocity at the highest point is 0
Generally her velocity when the feet hits the water is mathematically evaluated from kinematic equation as
The negative value of the velocity is selected because the velocity is on the negative y-axis
Explanation:
Given:
t = 20 seconds
x = 3000 m
y = 450 m
a) To find the vertical component of the initial velocity , we can use the equation
Solving for ,
b) We can solve for the horizontal component of the velocity as
or
Idk im not very good at math
It should be true: electrons low from negative toward positive to negative toward positive because opposite charges attract each other.
I hope this was correct