Answer:
45.13 beats/min
Explanation:
Speed of space vehicle = 0.51c
the pulse rate measured by the astronaut= 61.0 beats per minute
Pulse rate measured by the Earth observer is given by
putting vales we get
= 45.13 beats/min
Both mechanical and electromagnetic waves _____. have compressions and rarefactions oscillate in the same direction as the wave
1 answer:
You might be interested in
Answer:
Explanation:
I hope, it helped you.
The best symbolizes the hydrogen bonding between two water molecules is given in the diagram.
<h3 /><h3>What is hydrogen bonding?</h3>A hydrogen bond is an attraction between an electronegative atom carrying a single pair of electrons—the hydrogen bond acceptor—and a hydrogen atom that is covalently bonded to a more electronegative "donor" atom or group.
One definition of a polar covalent bond is one in which one atom has a stronger alternation for electron negativity difference between two bonds, the more polar the link.
Polar molecules like H2O have a mild partial negative charge in one area and a partial positive charge in another.
to learn more about hydrogen bond go to -
#SPJ4
Answer:
a)11,71 m/s
b)12.73 m/s
Explanation:
We apply the conservation principle because there is no friction between the hill and the sled:
Total initial energy (Ei) = Total initial energy (Ef), Equation(1)
We define:
K = Kinetic energy =
U = Potential energy =
m = mass (kg)
v = velocity (m/s)
h = height (m)
g = gravity acceleration =
A) hi=7m, hf=0 ,vi=0 , vf=?
Answer: She reaches the base of the hill with speed of 11.22 m/s
B) hi=7 m, vi=5 m/s, hf=0, vf=?
We divide all terms by m
Answer: She will move with a speed of 12.73 m/s when she reaches the base of the hill