How much heat (in kcal) must be removed to make ice at -10°C from 2 kg of water at 20°C? (The specific heat of ice is 2090 J/kg °C, specific heat of water is 4200 J/ kg 0C, and latent heat of fusion of ice 3.33×105 J/kg, 1 cal = 4.2 J)

The magnetic field a distance 2 cm from a long straight current-carrying wire is 2 x 10–5 The current in the wire is: (

Kirchhoff’s junction rule is a statement of

If the number of turns on the transformer input is greater than the number on the output, then the transformer 

A spherical conductor (radius = 1.0 cm) with a charge of 2.0 pC is within a concentric hollow spherical conductor (inner radius = 3.0 cm, outer radius = 4.0 cm) which has a total charge of -3.0 pC. What is the magnitude of the electric field 2.0 cm from the center of these conductors?

A 5.00 µC point charge is at the origin, and a point charge -2.00 µC is on the axis at (3.00, 0) m. If the electric potential is taken to be zero at infinity, the electric potential due to these charges at a point P with co-ordinates (0, 4.00) m is

An astronaut is in an all-metal chamber outside the space station when a solar storm results in the deposit of a large positive charge on the chamber. Which statement is correct?

A proton moves around a circular path (radius = 2.0 mm) in a uniform 0.25-T magnetic field. What total distance (in km) does this proton travel during a 1.0-s time interval? (m = 1.67×10-27 kg, q = 1.6×10-19 C).

A concave mirror has a focal length of 20 cm. What is the position (in cm) of the object if the image is upright and is two times larger than the object?

Refer to the products tab. What was the average sales price? Round to the nearest dollar. Do not use dollar signs, commas, or decimals.