Calculating the energy radiated per minute in a tungsten filament.

Calculate the energy radiated per minute from the filament of an incandescent lamp at 2000 K, if the surface area is 5 x 10^-5 m^2 and its relative emittance is 0.85.

Finding the force experienced by each of two long straight parallel conductors

Find the force experienced by each of two long straight parallel conductors of length, L, separated by a distance, d, and carrying currents i1 and i2.

Multiple choice question about calculating the average emf induced.

The mutual inductance of two coils is 0.750 H. Calculate the average emf induced in secondary if the current in the primary reaches 6.00 A in 0.030 sec. A) 150 V B) 0.00375 V C) 0.135 V D) -150 V

Types of forces interactions: strong, electromagnetic, gravitational, and weak.

See attachment for problem statement. Forces interaction: strong, electromagnetic, gravitational, and weak.

Multiple choice questions in regards to heat, power, voltage, resistance, and time.

PART ONE: The heating element of an electric hot plate, 26.5 ohms resistance, is connected across a 115 V circuit. How much heat will be developed in 10.0 seconds? A) between 1000 J an 2000 J B) less than 1000 J C) between 2000 J and 4000 J D) Over 4000 J PART TWO: The power dissipated by the heating ele ...continues

Calculating the speed of light in a substance given the index of refraction.

The index of refraction of carbon tetrachloride is 1.46. The speed of light in this material is: A) less than 1.00 x 10^6 km/s B) between 1.00 x 10^6 and 2.00 x 10^6 km/s C) between 2.00 x 10^6 and 3.00 x 10^6 km/s D) greater than 3.00 x 10^6 km/s

Balancing a radioactive decay equation.

In the equation 226/88 Ra--> 4/2 He+ ------, the characteristics of the missing particle are: A) charge, 90; nucleons, 230 B) charge, 86; nucleons, 230 C) charge, 90; nucleons, 222 D) charge, 86; nucleons, 222

Concave mirror

For an image formed by a concave mirror to be a point, the object must be: A) between the principle focus and the mirror B) at the center of curvature C) at an infinite distance D) at the principle focus

Batteries and Circuits

PART ONE: A battery that supplies an emf of 6.0 V has an internal resistance of 0.20 ohm. It is connected to a load resistor of 8.8 ohms. The total Current in the entire circuit is: A) less than 0.25 A B) between 0.25 A and 0.50 A C) between 0.50 A and 1.0 A D) greater than 1.0 A PART TWO: A battery of fou ...continues

Resistors

PART ONE: If an electric circut contains only an ordinary resistor, all the work done by the electric current appears as: A) light B) rotary motion C) chemical action D) heat PART TWO: Two 10.0 ohm resistors are connected in parallel, and this combination is connected in series with a third 10.0 ohm re ...continues