Answer:
False.
Explanation:
Mechanical waves require a medium in order to transport their energy from one location to another.
Your potential energy at the top of the hill was (mass) x (gravity) x (height) .
Your kinetic energy at the bottom of the hill is (1/2) x (mass) x (speed)² .
If there was no loss of energy on the way down, then your kinetic energy
at the bottom will be equal to your potential energy at the top.
(1/2) x (mass) x (speed)² = (mass) x (gravity) x (height)
Divide each side by 'mass' :
(1/2) x (speed)² = (gravity) x (height) . . . The answer we get
will be the same for every skater, fat or skinny, heavy or light.
The skater's mass doesn't appear in the equation any more.
Multiply each side by 2 :
(speed)² = 2 x (gravity) x (height)
Take the square root of each side:
<u>Speed at the bottom = square root of(2 x gravity x height of the hill)</u>
We could go one step further, since we know the acceleration of gravity on Earth:
Speed at the bottom = 4.43 x square root of (height of the hill)
This is interesting, because it says that a hill twice as high won't give you
twice the speed at the bottom. The final speed is only proportional to the
<em>square root </em>of the height, so in order to double your speed, you need to
find a hill that's <em>4 times</em> as high.
Answer: How does the temperature of the samples change?
As the temperature increases, the rate of reaction increases. Particles can only react when they collide. ... Increasing the temperature increases reaction rates because of the large increase in the number of high energy collisions. It is only these collisions that will produce the reaction. Low-temperature experiments prevent denaturation of samples. ... When the temperature of the protein water solution is reduced below the ... The FB peak position does not change but its intensity changes proportionally with variation of intensity of incident radiation.
Which way does the energy flow?
Energy flow in ecosystem occurs by food chain from producer to consumers. ... Then energy is transfered from producers to consumers, called as heterotrophs. Primary consumers are called as herbivores. Herbivores are eaten up by secondary consumers, called as carnivores. Energy flow is always unidirectional. Energy flows progressively from one trophic level to another and cannot revert back. In most of the natural ecosystems, energy comes from the sun, it is trapped by producers and then pass on to successive trophic levels in the form of food.
Explanation:
Since the car is going 10m/s already just put that aside.
Accelerating at a rate of 3m/s for 4 seconds
3×4=12
12+10= 22m/s is the Final Velocity
Answer:
question 1: force
question 2: velocity or inertia
question 3: 0
