When a physical change occurs in a sample of matter what does not change for that substance?

How can the design of a building such as a concert hall reduce unwanted noises and echoes

A small ball of mass m is aligned above a larger ball of mass M = 0.63kg (with a slight separation) and the two are dropped simultaneously from a height of 1.8m.

Which term defines a powers shared by state and federal governments? A. Concurrent. B. Expressed. C. Implied. D. Reserved

99 percent of the earth's atmosphere by mass is made up of only elements. These elements are A) Carbon and oxygen B) Nitrogen and oxygen C) Hydrogen and oxygen D) Helium and hydrogen

Incline plane examples from daily life

Norma kicks a soccer ball with an initial velocity of 10.0 meters per second at an angle of 30.0% if the ball moves though the air for 3.2 seconds what's the horizontal distance traveled by the ball

Suppose s (t) is the position of an object moving along a line at time t is greater than or equal to 0. What is the average velocity between the times t=a and t=b? What is the instantaneous velocity at t=a?

Estimate how long it would take one person to mow a football field using an ordinary home lawn mower. suppose that the mower moves with a 1-km/h speed, has a 0.5-m width, and a field is 360 ft long and 160 ft wide. 1 m = 3.281 ft.

Badri makes the table below to review the factors that affect the electric force between objects. Which change will correct the error in Badri's table?

A star with the same mass of the sun has a newly discovered planet whose semi-major axis of 2.48 au and an eccentricity of 0.08. what is the aphelion distance of the new planet