The formula for speed is distance÷time. The distance in this situation is 27km and the amount of time taken to cover that distance is 5 hours. Now, we substitute the values into an equation:
Speed = 27km/5h
Speed = 5.4km/h
Therefore, Desmond's speed is 5.4km/h.
Answer:
The mass of the box, m = 30.61 Kg
The acceleration of the box, a = 0.65 m/s²
Explanation:
Given that,
The weight of the box, w = 300 N
The sliding force acting on the box, F = 20
Since the weight of a body is equal to the product of mass and displacement. The mass of the box is given by the relation
m = w/g
Substituting the given values in the above equation
m = 300 / 9.8
= 30.81 Kg
Hence, the weight of the box is, w = 30.81 Kg
Since the sliding force acting on the box is 20 N
Therefore, acceleration
a = F / m
= 20 / 0.81
= 0.65 m/s²
Hence, the acceleration acting on the box, a = 0.65 m/s²
Answers: Disposable hand warmers turn up the heat in your mittens by means of an exothermic reaction that, in essence, just creates rust. Each pouch typically contains iron powder, salt, water, an absorbent material, and activated carbon. -or- The chemical reaction that takes place in hand warmers is exothermic, meaning it releases excess energy as heat. That's why you can mix a few chemicals to warm your hands!
Comment below if this helped! Brainliest would be great!
Answer:
I think c is the answer but I have a little concern on d too