Homework Statement
a 0.25 kg piece of ice at -30°C is warmed by an electric heater and the following graph of temperature is produced.
-use the information on the graph to determine the power output of the heater
the graph shows that the ice went from -30degC to -10 degC in 150s
Homework...
Homework Statement
how much energy must be added to the water to create 2.0 kg of steam?
Homework Equations
The Attempt at a Solution
I have no idea how im supposed to figure the answer out. what formulas do I use?
I tried the third answer using the sin and cosine law. Is this right?
fnet^2=2N^2+17N^2 -2(2N)(17N)cos45
Fnet=square root of:244.9
Fnet=15.6N or 16N
sin45/15.6N=sin/2N
sin=2Nsin45/15.6N
sin-1(0.0906)
=5.2deg
45deg-5.2deg=40
if i subtract 24deg from 24 deg i get 0? is this really the answer?
for the third question i'm just going to break it down into components because that way makes way more sense to me. maybe that's not the expectation, but i don't think id loose any marks for doing so.
Thank you for all your...
"In your third answer, the magnitude of the net force ##F_{net}=24N## is correct, but the angle is incorrect because you have used the Sine Rule in some triangle that doesn't exist. I suggest you to draw a sketch for each problem with a completed parallelogram and angles properly annotated so...