Calcium metal reacts with a potassium chloride solution to form calcium chloride and potassium ions. Classify this reaction. Ca (s) + 2KCl (aq) → CaCl2 (s) + 2K + (aq)

Which statement describes how diffusion works? Molecules always move from inside of the cell to outside of the cell. Molecules always move from areas of high concentration to low concentration.

When do magnets attract other magnets?

An X-Y graph with plots of observations allows sketching a trend line. What does the slope of the trend line represent? A. the rate of change in accuracy of the data B. the slope of the trend line has no meaning in experiments C.

Write an expression to evaluate the relative error in g (given that g = 2h/t^2) in terms of h,Δh, t,Δt

A person rearranging their living furniture expends 350 J of energy to push a coach 4.5 m across their living room. Calculate the amount of force they exerted.

E=mc^2 solve for c E/m m/E sqrt (E/m) sqrt (m/E) E - m sqrt (E-m)

For resonance to occur, the object must experience a frequency equal to its what? amplitude period wavelength natural frequency

Rasheed runs a football 10 meters east, turns and runs the football 6 meters west. If his velocity during this run is found to be 3 meters/second, how long does this take Rasheed to complete this run?

What is the approximate weight of a 20-kg cannonball on the moon if the acceleration due to gravity is 1.6m/s^2

A man consumes 2245 kcal of food in one day, converting most of it to maintain body temperature. If he loses half this energy by evaporating water (through breathing and sweating), how many kilograms of water evaporate?