Answer: Phillipe wins the race
Explanation:
Given
Length of track=20 m
Velocity of Phillippe=2 m/s w.r.t sidewalk
Velocity of sidewalk=1.5 m/s
Rena velocity=2 m/s
Therefore absolute velocity of P is 2+1.5=3.5 m/s
Time taken by phillippe
=5.714+10=15.714 s
Time taken by rena
as the time taken by phillippe is less than rena therefore Phillippe wins the race.
B. It reflects a lot of light, transmits almost no light, and absorbs some light.
Answer:
7.99 × 10⁸ atoms
Explanation:
The diameter of Molybdenum atom is 418pm = 0.000000000418m
therefore to determine number of Mo Atoms that'll be required =
0.334 ÷ 0.000000000418 = 7.99 × 10⁸ atoms
Mass of one Mo atom = 1.59×10⁻²² g
Mass of 7.99 × 10⁸ atoms that'll be required = 1.59×10⁻²² × 7.99 × 10⁸ =
12.7041 × 10⁻¹³g.
Answer: The salinity of freshwater is 0.5 ppt, the salinity of salt water is 35 ppt.
The freezing point point of fresh water is 32 degrees Fahrenheit, the freezing point of salt water is 28.4 degrees Fahrenheit.
The distribution of fresh water on earth is 3%, the distribution of salt water is 97%.
Fresh water is found in glaciers, underground, lakes, rivers, and swamps, salt water is found in oceans.