Thanks its coming together now.
so my current = 20/9.93 = 2A
I don't understand how to get degrees yet
\phi = tan^{-1}\frac{y}{x}
do I take 8.3/5,5 tan and then use above formula?
what is the -1 how do i use on calculator?
Here is a problem I got wrong, with the solution.
I don't understand how they got answer.
I don understand how you get
5.6 + j8.2 as 9.93 <55.67
how does 5.6 become 9.33
and j.2 = 55.67
I'm confused on how to get proper result
I have now I = 20V <20 degree/ 5.6+J8.2
and I found in book the way to draw circuit.
but I don't understand how to use the equation with cos and j 20 sin.
Ok, I'm checking myself with text that has answers in back for just odd numbers.
the only answer they give is 2500/pi Hz
but the true answer is to go another step and divide the 2500 by pi.
ok
thanks.
I’m really struggling here, if A = 50 and wt = 5000
If I want to know freq should I take the sin of 50(0.7666) and then multiply that by 5000
I have 10 problems I need to lean how to use this equation.
Vs = A*sin({\omega}t + {\phi})+C
this formula states Vs =
Using the information I'm given
50 * sin(wt + 0) + C
is that the sin of 5000t
I'm confused on this I never used this type of equation before.
Can someone let me know if I'm going in the right direction.
The electrical force on a 2-columb charge is 60 newtons, What iis the magnitude of the electric field?
E =f/q
E= 60/2
E=30
If a charge of +3 x 10 -6columbs sets up an electrical field, find:
a. The magnitude of...
I'm trying to grasp the concept between Electric Potential and Electric Potential Energy.
A charge object has an electric potential,
and electric potential =
electric potential energy/charge
I still can't explain the difference between the two(Electric Potential vrs Electric...
I can't find formula for determing the number of rotations a wheel makes in one minute.
Diameter = 26"
Traveling at 20 feet per second.
is there a formula for RPM?
Also need the formula to determine angular velocity.
thanks
T = 2*pi * Sqrt 1/g
Is this the proper formula for finding the period of a pendulm?
The length = 0.9 meters
g= 9.8m/s^2
I come up with 1.90s..
am I going in right direction?
A motorcyclist intends to perform a stunt in which he jumps a 25meter wide river.
The motorcyclist must jump from a cliff on one-side 20 meters lower than the other side.
The motorcyclist approaches the cliff at 50m/s
What formula should I use to solve for
the Horizontal direction...
A Ferris wheel has a radius of 8 meters and rotates once every 15 seconds.
A 10:1 scale model of the Ferris wheel also rotates once every 15 seconds.
Which has the higher Angular Velocity?
Solution: angular velocity = Change in rotation/change in time
Do I use the formula v = rw...
Problem:
What is the acceleration of a 20kg pail of cement that is pulled upward (not sideways)
with a force of 300N.
let g= 10m/s^2
Answer:
20kg*10m/s^2 = 200N
a = (300N-200N)/20kg
a = 5m/s^2
The book gives me the answer as 2m/s^2...
did I miss something? I beleive this to be a...
In the terms of rotational inertia why is it hard to walk without bending your knees?
The greater the bulk of the object mass to its axis the greater its rotational inertia.
how can I relate that to walking without bending knees?
I understand that with rotational inertia an object...
I can define both terms Linear Speed, Rotational speed,
but I need to find the formula difference so I can show how
rotational speed is changed to linear Speed.
I can not find the formula for either.
So are you saying I should:
1/2 mv^2 = mgh
1/2 v^2/g=h
1/2(10^2/9.8)=5.1m
The text book I have in no way explains this, if this is correct
where can I get other sources of help on physics
The question is:
If a sprinter running at 10 meters per second could convert his
kinetic energy into upward motion, how high could he jump?
How do I solve this if I use the KE = 1/2 mv^2
I dont know what the mass is?