An electric heater is constructed by applying a potential difference of 110 V across a wire with a resistance of 5.0 ?. What is the power rating of the heater?
a. 2.0 kW
b. 2.4 kW
c. 1.7 kW
d. 1.5 kW
e. 60 kW
b
You might also like to view...
Four identical particles (mass of each = 0.40 kg) are placed at the vertices of a rectangle (2.5 m × 4.0 m) and held in those positions by four light rods which form the sides of the rectangle. What is the rotational inertia of this rigid body about an axis that passes through the mid-points of the shorter sides and is parallel to the longer sides?
A. 2.2 kg?m2 B. 2.8 kg?m2 C. 2.5 kg?m2 D. 3.1 kg?m2 E. 1.6 kg?m2
Tripling the aperture diameter of a camera lens will change the light intensity admitted to the film by what factor?
a. 0.11 b. 0.33 c. 3.0 d. 9.0 e. 12.0
An object at the center of curvature of a concave mirror forms an inverted image at the center of curvature itself
Indicate whether the statement is true or false
An object of mass m rests on a flat table. The earth pulls on this object, exerting a force of magnitude mg. What is the Newton's third law pair force to this pull?
A) The table pushing up on the object exerting the force mg. B) The object pushing down on the table exerting the force mg. C) The table pushing down on the floor exerting the force mg. D) The object pulling upward on the Earth exerting the force mg. E) The table pulling upward on the Earth exerting the force mg.