Answer:
Both Thomson and Rutherford used charged particles in their experiments.
Explanation:
A certain light bulb consumes 200J of electrical energy per second, but only emits 25J of light energy per second. Calculate the efficiency of this bulb.
Answer:
The answer is 12.5%
Explanation:
The efficiency of a light bulb is:
Light energy comes out of the bulb / Electrical energy that was put in
= 25J / 200J = 12.5%
Which of the following could be used to convert chemical energy to heat energy?
a. a chair sitting still
c. a leaf absorbing sunlight
b. a battery powering a flashlight d. a rock hitting the ground
Answer:
C
Explanation:
Inside a battery there are chemical reactions. When the battery is powering a flashlight, this chemical energy gives a heat one.
PLS HELP. I WILL MARK U THE BRAINLIEST IF U ANSWER EVERYTHING STEP BY STEP AND CORRECTLY.
Answer:
Distance = 15m
Displacement = 5m
Explanation:
For distance add the values
For displacement use Pythagoras formula
if a source of sound waves is rabidly approaching a person the sound heard by the person appears to have?
Answer:
have a frequency. higher than the frequency actually produced by the source.
Explanation:
Answer:
If a source of sound waves is rapidly approaching a person, the sound heard by the person appears to have - a pitch lower than the original pitch.
the particles in a gaseous substance can move easily because the____
a. particles are free to move
b. containing vessel is to big
c. force between them is weak
d. particles are moving with great speed
Answer:
a option okkkkkkkkkkkkkk
Answer:
particles are free to move