At what point does the object have the most potential energy?
At what point does the object have the most potential energy?
At what point does the object have the most potential energy?
As Bob jumps off the couch, his potential energy equals 50 J. What is his kinetic energy if his total mechanical energy is still 150 J?
If the power rating of a incandescent light bulb is 60 Watts, then how much time does it take the light bulb to run to acheive 120 J of work?
Someone wearing skates on a horizontal surface is pushed by a friend with a force of 65 N. How far must the student be pushed in 30 seconds, so that her power is 352 W?
If it took the quarterback in the last problem 0.2 [s] to throw the football, what is the quarterback's power rating?
In which of the following is potential energy being transformed into kinetic energy?
Consider an object falling from a height of 300 m. If we ignore air resistance, its total mechanical energy:
Which of the following is a subatomic particle with a negative charge which is found on the outside of an atom?
Unlike charges will repel one another.
Which of the following options is the best conductor of an electrical current?
Match the circuit diagram to the element it represents
| Stavka koja se može prevući | arrow_right_alt | Odgovarajuća stavka |
|---|---|---|
| arrow_right_alt | Battery |
| arrow_right_alt | Light Bulb |
| arrow_right_alt | Switch |
| arrow_right_alt | Resistor |
| arrow_right_alt | Voltmeter |
| arrow_right_alt | Ammeter |
Which of the following descriptions best describes the circuit in the picture?
Which of the following descriptions best describes the circuit in the picture?
Match the unit of measurement to the quantity it measures.
| Stavka koja se može prevući | arrow_right_alt | Odgovarajuća stavka |
|---|---|---|
Volts, [V] | arrow_right_alt | Resistance to charge flow. |
Ohm, [Ω] | arrow_right_alt | Electrical current |
Amperes, [A] | arrow_right_alt | Voltage |
Study the circuit above and answer the following question.
If an ammeter were placed in the same branch of the circuit as the bulb labelled #3, what current would it read?
Study the circuit above and answer the following question.
If an ammeter were placed after the junction after the bulb labelled #2, what current would it read?
What is the voltage across an electrical load which has a resistance of 39 Ohms and which has a current of 3 Amperes flowing through it?
A smartphone is connected to an external 24 Volt power supply. Calculate the current that the phone draws if it has a resistance of 8 Ohms.
A blender is connected to a 120 Volt power supply, and draws a current of 11.5 Amperes. What is the blender's resistance?
If a magnet with two poles is cut in half, it will have only one pole
All metals are magnetic.
Similar poles of a magnet repel each other.
A magnetic force cannot act on an electron when it moves...
The north-seeking arrow of a compass points to the magnetic north pole.
What is the lowest point of a wave called?
The regions of a wave where the particles are the CLOSEST together in a longitudinal wave are called
The measurement from crest to crest or from trough to trough is called what?
What is the unit for frequency?
Use the diagram of a wave below to answer questions 29-30. Assume each box is equal to 1 meter.
What is the wavelength (in m) of the wave above if each box is 1 meter long?
What is the amplitude (in m) of the wave above?
What is the frequency for a wave that has a velocity of 20 m/s and a wavelngth of 4 m?
Longitudinal waves ...
Refraction is . . .
The law of reflection states that . . .
Order these astronomy vocabulary from the largest object to the smallest:
solar system
galaxy
planet
universe
As far as we know, there is only one of these. We've only been able to observe approximately 4% of its entire volume.
A light year is the distance that light can travel in a year.
Which galaxy do we live in?
Compared to the earth's solar system, the universe is:
