The higher the surface area of a solid, the faster its reaction rate with a gas, the lower the surface area, the slower the reaction rate.
The only thing that mkes this question inconvenient is that it uses a mixture of units ... speed in km/hr, and acceleration in m/s². You can't directly mash those together.
What's the speed when we express it in m/s ?
Speed = (90 km/hr) · (1,000 m/km) · (1 hr/3,600 sec)
Speed = (90 · 1,000 · 1 / 3,600) · (km-m-hr / hr-km-sec)
Speed = 25 m/s
OK great !
-- The car is traveling at 25 m/s when the brakes are applied.
-- The brakes slow it down by 0.5 m/s every second.
-- So it takes (25/0.5) = 50 seconds to stop the car.
-- During that time, the car's average speed is (1/2)·(25m/s + 0) = 12.5 m/s .
-- Moving at an average speed of 12.5 m/s for 50 sec, the car travels
(12.5 m/s) · (50 s) = <em>625 meters</em>
The second law of thermodynamics
Newton's Second Law.
We have the following data, provided in the exercise:
Mass (m) = ?
Force (F) = 13607 N
Acceleration (a) = 2.9 m/s²
<em>To</em> calculate the mass, <em>we solve the</em> following formula:
We substitute the data in the clear formula.
<em>We break down the units of</em> Newton = Kg * m/s².
<h2>The mass of the truck is: 4692.07 Kilograms (Kg).</h2>
You would know it must have a charge, an Ion is a positively charged or negatively charged atom, so if it's an ion you know it has to have a charge.