Answer:
part 1. 1/2kx^2 = 1/2mv^2
1/2(850)(0.40)^2 = 1/2(0.5)v^2
68 = 0.25v^2
272 = v^2
v = 15.49m/s
Explanation:
part 1. the max potential energy would be equal to the maximum kinetic energy assuming no energy is lost, because of this, we can set the spring potential energy to the kinetic energy. from there plug in all the variables sorry all known variables and solve for v. make sure to plug in 0.5 for mass so that it is in kilograms.
Answer:
Reliability can be estimated by comparing different versions of the same measurement. Validity is harder to assess, but it can be estimated by comparing the results to other relevant data or theory.
Answer:
2.5 m/s
Explanation:
The speed of a wave is given by:
where
f is the frequency
is the wavelength
The wave in this problem hits the beach about every 2.0 seconds: this means that its period is 2.0 s. So the frequency is the reciprocal of the period
The crests are 5.0 m away from each other, so the wavelength is
Therefore, the speed of the wave is
The Earth radius is
.
For the law of conservation of energy, the energy required to move the object to an altitude of h=2r is equal to the gravitational potential energy of the object at that altitude, which is
And this is the energy required to move the object at that altitude.
B because it is basically 12 km/ hour