"The rider uses energy to do work going up the mountain. This energy is converted to potential energy and then changes into kinetic energy on the way down" is the way he could <span>use the law of conservation of energy to describe his trip down the mountain. The correct option is the first option.</span>
Explanation:
Given that,
We need to find the orbital speed and period of a satellite in orbit above Earth.
The formula for the orbital speed is given by :
Let T be the time period of the satellite. It can b solved using Kepler's third law i.e.
Hence, this is the required solution.
Work = force x distance
62,500 joules = boulder's weight x 25 meters
Divide each side by 25 meters:
Boulder's weight = 62,500 joules / 25 meters = 2,500 newtons
That's about 562 pounds
Connect the little light thingys to the top of the battery
Explanation:
The amount of CD is 35 g, and the amount of AC is 40 g.
Explanation:
AB + CD \rightarrow AC + BDAB+CD→AC+BD
The law of conservation of mass states that in any chemical reaction, the total mass of the reactants must be equal to the total mass of the products.
In this reaction, we know the mass of one reactant (AB, 15 g) and the mass of one product (BD, 10 g). In order to have the same total mass on the left side and on the right side of the equation, the mass of AC must be 5 g more than the mass of CD. We see that the only choice that satisfies this condition is:
The amount of CD is 35 g, and the amount of AC is 40 g.
In fact, if we assume these masses are correct, we have:
- on the reactant side: m(AB)+m(CD)= 15g + 35g = 50g
- on the product side: m(AC)+m(BD)= 40g + 10g = 50g
so, we have the same mass on both sides of the equation, and the law of conservation of mass is satisfied.