waves (physics 11)
calculate the speed of a wave with frequency 25Hz and wavelength of 0.050m.
1.25m/s
Calculate the current in a series circuit with R1=5 Ω, R2=10 Ω, and R3=15 Ω, powered by a 12 V battery.
0.4A
( ) is a quantity with magnitude only
scalar
factor:
x2-9
(x-3)(x+3)
what is kinetic energy
energy possessed by moving objects
a 2.0cm virtual image is produced from a 4.0cm object placed 3.0cm in front of a mirror.
what type of mirror is used? (hint: first letter starts with c)
convex mirror
In a parallel circuit with resistors R1=6 Ω, R2=12Ω, and R3=24 Ω, the total voltage is 24V. What is the current?
7.0A
( ) is a quantity with magnitude and direction
vector
what is the quadratic formula
x = [-b ± √(b2 - 4ac)]/2a
define Ohm's law
voltage across a conductor is proportional to the current flowing through it considering that the temperature remains constant
calculate the angle of refraction for a light ray incident at 30.0 degrees on water coming from air
22.1 degrees
If electricity costs $0.0500 per kWh, calculate the total cost to operate a 1500 W oven for 5.00 hours.
$0.375
Calculate the time it would take sunlight traveling at 3.0x10^8 m/s to reach earth 1.5x10^11 m away in minutes
8.3 minutes
factor:
8x2+2x-3
(2x-1)(4x+3)
This physicist proposed the theory of general relativity.
The name of the physicist is:
Alber Einstein
A 15cm object is placed 12cm in front of a CONVEX lens with a focal point of 9.0cm.
Calculate the image distance
36cm
Calculate the current flowing through a 450 W appliance when connected to a 120 V power line,
3.8A
The acceleration of an object with constant velocity.
0m/s^2
x2+kx+8=(x+2)(x+4)
what is the value of k?
6
This is the name for the force that opposes the motion of two surfaces sliding past each other.
What is the name of this force?
friction
Calculate the focal length if a 15.0cm object placed 12.0cm in front of a concave lens produces a 7.00cm image.
-10.5cm
Calculate the resistance of an oven connected to a 120 V power line with 16 A of current, and the average amount of energy given to each electron every second.
7.5 ohms of resistance and 1.9x10^-17 J/e-
The amount of time it takes for a ball dropped at 2.0 m to hit the ground.
0.64 seconds
solve for x:
sin(90)+12(3+1)+sin(x)=15
undefined
what is absoslute zero (include temperature in celcius degrees)
Temperature where the kinetic energy of particles theoretically becomes zero.
(-273 celsius degrees)