You pull a solid iron ball with a density of 7.86 g/cm^3 and a radius of 1.20 cm upward through a fluid at a constant speed of 7.00 cm/s. the fluid exerts a drag force that is directly proportional to speed, and the proportionality constant is 0.950 kg/s. what is the magnitude of the force (in n) you exert on the ball? (you may ignore the buoyant force.)

Amplitude is a measure of a waves a; speed b; distance c; energy d; frequency

Tungsten-filament lightbulb emits light based on the temperature of the filament. which phenomenon does this demonstrate?

An engineer designs a roller coaster so that a car travels horizontally for 152 ft, then climbs 137 ft at an angle of 34.0° above the horizontal. it then moves 137 ft at an angle of 48.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)