Unit 1
What is the Scientific Notation
6.02 x 10²³
What are Newton's Three Laws?
1. Object in Motion stays in motions
2. Force= Mass x Acceleration
3. For every action, there is an equal and opposite reaction.
What is the formula for Work and Power?
Work= Force x Distance
Power= Work /Time
A neutral object will become positive if _______?
looses electrons
What is the unit for frequency?
Hertz
What is the acceleration of Gravity?
9.8 m/s²
What are the 2 types of friction?
Static and Kinetic
What is the unit for energy?
Joules
What are the units for power and charge?
Power: Watts
Charge: Coulombs
What does a wave transmit?
Energy
What does the slope of the Position vs. Time graph represent?
Velocity
What is the Universal Gravitation Constant?
6.67 x 10^-11
What is the difference between potential energy and kinetic energy?
Potential energy: energy being stored
Kinetic Energy: energy in motion
What is the difference between a Parallel Circuit and Series Circuits?
Parallel Circuits have more than one path throughout the circuit.
What are the 5 different waves?
Reflection Refraction Diffraction Polarization Interference
Convert into scientific notation
43500
4.3500 x 10^4
move the decimal four spots to the right
An 8 N force act on a 5 kg object for 3 seconds. What is the impulse?
J=FT
J= (8N) x (3s)
J= 24 N x S
What is the potential energy of a 6250g weight hanging 1.2 meters off the ground.
Pe=mass x gravity x height
convert 6250g to 6.25 kg
Pe= (6.25)(9.8)(1.2)
How far apart are two electrons (-1.6 x 10^-19 C if they have force of 2 N?
Fe=(Kq1,q2)/d^2
2=((9x10^9)(-1.6x10^-19))/d^2
d=1.07x10^-14m
A radio wave has a frequency of 5x10^9 Hz. What is the wavelength?
v/f= frequency
3x10^8/5x10^9=.06m
A hiker traveled 8 miles East and 2 miles North, how far did he travel?
8^2+2^2=x^2
68=x^2
square root 68 = square root x^2
8.25 miles traveled
A 20,000 N car is acted upon by a force that decrease its speed from 10m/s to 5m/s in 5 seconds. What is the magnitude of the force?
F(t)=m(Vf-Vi)
F(5)=(2040.8)(5-10)
5F=(2040.8)(-5)
F=-2040.8
What is the Kinetic Energy of a rock being thrown at a velocity of 200 m/s?
KE= mv^2/2
((500)(200)^2)/2
10,000,000 Joules
What is the electric field if on a test charge off 55uC with a force of 100N?
E=F/Q
E=100/55x10^-6
e=1.8 x 10^6 N/C
How much mass would be needed to produce 1.3 x 10^16 J of energy?
E/C62=m
1.3x10^16/(3x10^8)^2=.14kg