Which of the following is a physical change? adding acid to milk to form sour cream, adding enzymes to milk to form cheese, adding bacteria to heated milk to form yogurt, adding sugar to milk to form sweetened milk

In a chemical equation, the chemicals that react are considered. In a chemical equation, the chemicals that are produced are considered. In chemical equations, both sides of the equation must be; if they are not, coefficients must be used.

What are artificial magnets and natural magnets? examples

A boy pushes on a box of mass 39 kg and it moves at an acceleration of 7.8m/s2. With what force does the boy push on the box?

Which of the following will happen when the force with which an object pushes down on the ground is equal and opposite to the force with which the ground pushes it up?

A particle moves along the x axis. Its position as function of time is given by x=6.8t+8.5t^2, where t is in seconds and x is in meters. What is the acceleration as a function of time?

If the energy stored in the fully charged battery is used to lift the battery with 100-percent efficiency, what height is attained? Assume that the acceleration due to gravity is 9.8 m/s2m/s2 and is constant with height

How does the mass of an astronaut change when she travels from earth to the moon? how does her weight change?

If an object has a mass of 20 grams and a volume of 40 cm3, what is its density in g/cm3?

Discuss how systematic and random errors influence the precision and accuracy of an experiment.

Matthew rolls a bowling ball with a speed of 2 meters/second. The ball hits the pins with 1.8 joules of kinetic energy. The mass of the bowling ball is kilograms. NextReset