Circuits
Ohm's law
Energy and power
Motion
General science
100
What is an electrical circuit?
a complete or closed path through which charge can flow from one terminal f an electrical source to the other.
100
Ohm's law formula
V=IR
100
What is the unit for measuring energy
Joule
100
For all falling objects on Earth, acceleration
A. is constant and negative.
B. is constant and positive.
C. increases from negative to positive.
D. decreases from positive to negative.
A. is constant and negative. - Correct.
The acceleration is a constant -9.81 m/s2, which causes all falling objects to accelerate toward the center of Earth.
100
He loved math and physics. He gave us the equation E=mc2
Albert Einstein
200
What does the symbol V, R stand for
voltage, resistance
200
Difference between Ohmic and non Ohmic devices
The device which follows ohm's law for all voltages across it is called as an ohmic device.(i.e resistance is constant for all currents that pass through it).
The device that does not follow ohm's law is known as a non-ohmic device (i.e the resistance is different for different currents passing through it).
200
What is the unit for measuring power
Watt
200
Identify the following quantities as scalar or vector:
the speed of a snail, the time it takes to run a mile, the free-fall acceleration.
A. vector, scalar, scalar
B. scalar, scalar, vector.
C. vector, scalar, vector
D. scalar, vector, vector
scalar, scalar, vector.
200
The third planet from the Sun
Earth
300
what is a series circuit (draw example)
closed circuit in which the current follows one path
300
An electric heater draws 3.5 A from a 110 V source. The resistance of the heating element is approximately
31 
300
What formula can be used to find power, given the energy and the time?
P=E/t
300
For the winter, a bird flies 20.0 m/s due south against a gust of wind with a speed of 2.5 m/s.
What is the resultant velocity of the duck?
17.5 m/s south. (20-2.5)
300
The part of the atom that contains protons and neutrons.
nucleus
400
What is a parallel circuit (draw example)
where the circuit is divided into two or more paths.
400
If 750 µA is flowing through 11 k of resistance, what is the voltage drop across the resistor?
8.25 V
400
What is the energy used in this situation: A 1400-W blow dryer is used for 10 min?
E = P t = 1400×10/60 =233.33 Wh
400
A small stone is dropped from the top of a tall building. It takes 3 seconds to reach the ground. The acceleration of the stone on the way down is 10 m/s2. Calculate the speed of the stone as it hits the ground.
speed = acceleration x change in time = 10 x 3 = 30 m/s
400
The sections of chromosomes that determine traits such as eye colour, hair colour, and height.
genes