Van traveling at 30 km/h slows to 20 km/h in 3 seconds. What is the acceleration of the van?

I know the formula end velocity - starting velocity divided by time. My question is do you to convert km/h to m/sec?

Arthur and Betty start walking toward each other when they are 100 m apart. Arthur has a speed of 3.0 m/s and Betty has a speed of 2.0 m/s. Their dog, Spot, starts by Arthur's side at the same time and runs back and forth between them at 5.0 m/s.

What is the difference between O and O2

The spin cycles of a washing machine have two angular speeds, 436 rev/min and 605 rev/min. the internal diameter of the drum is 0.420 m.

Who is known as the father of chemistry because he first organized all known elements into four different groups

The number 3 in hydrogen in NH33 is the

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

A weather balloon is inflated to a volume of 2.2 x 10^3 L with 374 g of helium. What is the density of helium in grams per liter?