Answer:
u₂ = 3.7 m/s
Explanation:
Here, we use the law of conservation of momentum, as follows:
where,
m₁ = mass of the car = 1250 kg
m₂ = mass of the truck = 2020 kg
u₁ = initial speed of the car before collision = 17.4 m/s
u₂ = initial speed of the tuck before collision = ?
v₁ = final speed of the car after collision = 6.7 m/s
v₂ = final speed of the truck after collision = 10.3 m/s
Therefore,
<u>u₂ = 3.7 m/s</u>
Conservation of energy means that initial kinetic energy =maximum gravitational potential energy. 1/2 * 3 * 10^2 = 150J. The gravitational potential energy at the top is 150 joules. The gravitational potential energy is calculated through mgh, so 150 = 3 * 10 * h. Height is 5 meters
Answer:
433.15K
Explanation:
(320°F − 32) × 5/9 + 273.15 = 433.15K
<span>1.the higher the temperature of something, the greater its thermal energy.
2. the change in state from gas to liquid is called evaporation.
3. energy that comes from bonds within matter is called chemical energy.
4. the change in state from liquid to gas is called vaporization.
5. gas bubbles forming throughout the liquid is called boiling.
6. liquid changing to gas only at the surface is called evaporation.
7. the change in state from solid to liquid is called melting.
8. the change in state from liquid to solid is called freezing.
9. the law of conservation states that during any change, the amount of energy stays the same
10. another term for a chemical change is a chemical reaction
11. in sublimation, particles pass directly from solid to gas</span>
There ya go, Champ. Now you have all the answers and you haven't
learned a thing.
Answer:
The nephew
Explanation:
The dog's foot prints are overlapping the shoes that are overlapping the tire marks from 3 different tires, if the dog is his seeing dog then it would make sense that the dog's foot prints are next to his and they're going in the same direction, and since the dog's footprints overlap the others it means that they were there last.
People were confused so I'll resay it. The dog is the nephew's seeing dog, so he walks beside him. And if the dog's foot prints are overlapping all of the other's, that means the dog was there after all of the rest of them, and if the nephew is with the dog then the nephew was there last.