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The following data are the measurements of the dimensions of a box.
𝑙 = 3.0 ± 0.3 cm
ℎ = 51.1 ± 0.5 mm
𝑤 = 2.03 ± 0.01 m
How should the volume of the box be reported (central value ± uncertainty)? Write your calculations and box your final answer.
Water enters the condenser at 30 degrees Celsius and leaves at 60 degrees Celsius. What is the temperature difference in degrees Rankine
If two equal charges, each of 1 C are separated in the air by a distance of 1 km, what would be the magnitude and kind of force between them?
A 200 g object is whirled in a horizontal circle with a cord of radius 1.2 m at 2261.95 cm/s. The centripetal acceleration is .
The piston of a hydraulic automobile lift is 30 cm in diameter. What pressure, in
pascals, is required to lift a car of mass 1500 kg. Also express this pressure in
atmosphere.
Copper has a density of 9 g/cm3 and a bulk modulus of 1.2 x 1011 N/m2. What isthe speed of a wave through it?
How much work would be required to move 4.0C of charge between the same two points of the problem above?
Capacitance is measured in___________
a.) Hz
b.) Farads
c.) Coulombs
d.) Volts
If the capacitor is CONNECTED to the battery, what remains constant if the area of the metal plates is increased? *
1 point
a.) Capacitance
b.) Charge stored in the capacitor
c.) Energy stored in the capacitor
d.) Voltage across the metal plates
You have three capacitors and a battery. In which of the following combinations of the three capacitors will the maximum possible energy be stored when the combination is attached to the battery?
a.) Series
b.) Parallel
c.) Both combinations will store the same amount of energy
d.) None of the above
Two parallel plate capacitors C1 and C2 are arranged in parallel within a 10V circuit. If C1 stores 2C of charge and C2 stores 5C of charge, each over 3 seconds, what is the total capacitance of the circuit?
a.) 0.7 F
b.) 2.4 F
c.) 1.8 F
d.) 0.2 F
Two capacitors are fully charged and connected in series in a circuit powered by a 10V battery. Find the charge stored.C1=6FC2=2F
a.) 80F
b.) 80C
c.) 15F
d.) 15C
_________ is created out of two metal plates and an insulating material called a dielectric.
a.) An inductor
b.) A capacitor
c.) A variable resistor
d.) A fixed resistor
What happens to the charge in a capacitor during the discharging process?
a.) I dont know
b.) Decreases over time
c.) Remains the same
d.) Increases over time
What is a capacitor? *
a.) A device for storing capacitance
b.) A device for storing charge.
c.) A device for storing energy.
d.) A device for storing p.d.
Which of the following statements about dielectrics is false?
A dielectric material increases capacitance by increasing stored charge
A dielectric material increases voltage by decreasing stored charge
A dielectric material increases capacitance by decreasing voltage
A dielectric material is non-conducting
