A runner with a mass of 60kg accelerates at 2.2m/s2. What is the runner's net force?

Explain why science can never be absolutely proved

Which of the following scientists did not contribute scientific discoveries to physical science? A) Isaac Newton B) Marie Curie C) Gregor Mendel

A 6.0 m wire with a mass of 50 g, is under tension. A transverse wave, for which the frequency is 810 Hz, the wavelength is 0.40 m, and the amplitude is 4.0 mm, is propagating on the wire.

Which of the following requires freshwater supplies? A. industry B. agriculture C. both industry and agriculture D. neither industry nor agriculture

When refrigeration can't work how does the molecules work to keep it cool

Which of the following best describes the ultraviolet catastrophe of blackbody radiation? A. As energy is added to an object acting as a blackbody radiator, its emissions move to the ultraviolet part of the electromagnetic spectrum. B.

Is an engine-activated booster unit that reduces the effort required to apply the hydraulic brakes

A box is lowered using a rope. If the acceleration of the box, is 2.5 m/s2 (downward) and the tension in the rope is 31 N, what is the mass of the box (in kg) ?

On a very hot summer day, the rooms on the first floor of a house stay cooler than the rooms on the second. Which form of thermal energy flow causes this to occur? A) Conduction B) Convection C) Kinetic D) Radiation

What is a ion in science?