Questions from College Physics

Q: An expression for buoyant force is FB = ρgV, where FB

An expression for buoyant force is FB = ρgV, where FB has dimensions [MLT−2], ρ (density) has dimensions [ML−3], and g (gravitational field strength) has dimensions [LT−2]. (a) What must be the dimen...

Q: An object moving at constant speed v around a circle of radius

An object moving at constant speed v around a circle of radius r has an acceleration a directed toward the center of the circle. The SI unit of acceleration is m/s2. (a) Use dimensional analysis to f...

Q: What is the approximate distance from your eyes to a book you

What is the approximate distance from your eyes to a book you are reading?

Q: Estimate the volume of a soccer ball in cubic centimeters (

Estimate the volume of a soccer ball in cubic centimeters (cm3).

Q: Estimate the average mass of a person's leg.

Estimate the average mass of a person's leg.

Q: Estimate the average number of times a human heart beats during its

Estimate the average number of times a human heart beats during its lifetime.

Q: What is the order of magnitude of the height (in meters

What is the order of magnitude of the height (in meters) of a 40-story building?

Q: The quantity of energy Q transferred by heat conduction through an insulating

The quantity of energy Q transferred by heat conduction through an insulating pad in time interval Δt is described by Q/Δt = κA ΔT/d, where κ is the thermal conductivity of the material, A is the face...

Q: Average-sized cells in the human body are about 10 µm

Average-sized cells in the human body are about 10 µm in diameter. How many cells are in the human body? Make an order-of magnitude estimate.

Q: A patient's temperature was 97.0°F at 8:

A patient's temperature was 97.0°F at 8:05 A.M. and 101.0°F at 12:05 P.M. If the temperature changes with respect to elapsed time was linear throughout the day, what would the patient's temperature be...