Formulas
W=force x
distance
How far a man walks at 5.0m/s in 20 minutes?
100 m
Which of the following represent an energy transformation?
a.) boiling water
b.) burning fuels
c.) use solar panels
b and c
The highest point of a wave is called ....
crest
An example of insulator......
wood and plastic
Power= _______ divided by time
work
the 4 fundamental forces are
gravity
strong nuclear
weak nuclear
electromagnetism
In an open system the flow of energy and matter enter and exit the system.
True or False?
True
The distance between crest is the ......
wavelenght
The conductors have __________flow of electricity
high
The ohms law is:
I = V/R
The fundamental forces with infinite range are.....
gravity and electromagnetism
What is the kinetic energy of an object of 5 kg moving at 5.0m/s?
62.5 Joules
The two types of waves are .....
transverse and longitudinal
What is the current in a system with a 9volt battery and 3 ohms of resistance?
I= V/R
3 amps
In the formula W =m x g ; the value of g is
9.8 m/s2
if the force increases the acceleration ..........
increases
What is the potential energy for an object of 5.0 kg at 5.0 meters above the ground?
245 Joules
Short wavelenght produces __________ frequency
high
What is the resistance of a 12 volts light bulb in a system that creates 3 amps?
4 ohms
In the formula F = GM1M2/ r the value of g is
6.67 x10-11
if the distance increases the acceleration __________ and if the mass increases the acceleration __________
decreases;
increases
the law of conservation of energy states......
the energy can not be created or destroyed just transformed
With the doppler effect the pitch of the sound when an object is approaching you is _________ than when it move away from you.
Higher
Whta is the power of a 12 volt battery that creates 3 amps of current?
36 watts