Answer:
23.67 km / hr
Explanation:
car travels 355 km (d)
duration = 15 hrs (t)
average speed formula = v = d / t
v = 355 km / 15 hr
v = 23.67 km / hr
Answer:

Explanation:
Acceleration is the rate of change of velocity with respect to time. It is the change in velocity over the change in time, and it is calculated using the following formula.

The car starts at a speed of 10 meters per second, then it accelerates to a speed of 50 meters per second. It achieves this acceleration in 3 seconds.
= 50 m/s
= 10 m/s - t= 3 s
Substitute the values into the formula.

Solve the numerator.

Divide.


The car's acceleration is approximately <u>13.3 meters per second squared.</u>
Yes, we can determine power if we know force and distance.
As power= Force x velocity
and velocity= distance/ time.
The main part of Dalton's theory that remains true is that the atoms are not created, destroyed or splited during a chemical reaction which is the principle of the mass conservation law applied to the chemical reactions.
Two wrong points are that Dalton affirmed that the atoms could no be divided into smaller particles (atoms can be divided into several subatomic particles) and that the atoms of a same element are identicals (isotopes are atoms of a same element that differ in the number of neutrons)