This phenomenon can be describedby Hooke'slaw and expressed by the formula: F=k*deltax, where k is the spring's constant, and delta xis the displacement of the spring. Transposing the terms such that we want to know the value of k,
k = F/deltax = 100N/(22 cm - 20cm)
k = 50 N/cm
Answer:
Biodiesel is considered a renewable energy source because it is made with animal fat
Explanation:
Biodiesel is a fuel generated from animal fats, vegetable fats, using a catalyst for chemical formulation of biodisel.
It is a renewable source of fuel, as it can be replenished (renewed) easily & in shorter time, since it is made of animal fats & vegetable fats. Unlike non renewable fuels which take long periods to replenish (renew), like fossil fuels.
So, Biodiesel is considered a renewable energy source because it is made with animal fat
Waves have the
characteristic that they can of transmit energy. This characteristic depend
only on the medium and its properties. Electro-mechanical waves do not need
medium to transfer its energy, is capable of transmitting it through empty
space (vacuum).
<span>Mechanical
waves require a medium in order to transport their energy. Sound waves are an
example of mechanical way. They can not
travel through vacuum. </span>
Answer:
121Sb=57.2%
123Sb=42.8%
Explanation:
We are given that
Atomic mass of 121Sb=120.904 amu
Atomic mass of 123Sb=122.904 amu
Average atomic mass of antimony=121.760 amu
We have to find the percent of each of the isotope.
Let x be the percent of 121Sb and 1-x be the percent of 123Sb.
Using formula of average atomic weight
Average atomic weight=atomic weight of 121Sb
percentage abundance of isotope 121Sb+atomic weight of 123Sb
percentage abundance of isotope 123Sb
Substitute the values
Percentage of 121Sb=
57.2%
Abundance of isotope 123Sb=1-0.572=0.428
Percentage of isotope 123Sb=
42.8%
Decrease the amount of work done.
