Vs - velocity on beginning
ve - velocity on ending. You've got:
So he needed 4 second.
Answer:
20 m
Explanation:
Initial potential energy = final kinetic energy
mgh = 1/2 mv²
gh = 1/2 v²
h = v² / (2g)
Given v = 20 m/s and g = 10 m/s²:
h = (20 m/s)² / (2 × 10 m/s²)
h = 20 m
Answer:
option B
Explanation:
The correct answer is option B
Comets are the frozen snowball that is made of different gases and which rotates around the sun.
Comets are generally icy but when comets come near to the sum they get warm and release gasses which can be seen from the earth.
Comet produces a visible atmosphere or coma.
examples of comets are Halley's Comet, Comet Encke.
The orbit of comets is entirely beyond the orbit of Neptune.
Answer:
Radius = 3.96m
Explanation:
In a cyclotron motion, the radius of a charged particle path in a magnetic feild is given by:
r = mv/qB
Where r = radius
m = mass of particle= 9.1×10^-31kg
q = charged electron = 1.6×10^-19C
B = magnetic feid = 7.65×10^6T
V = velocity = 7.65×10^6
r = (9.1×10^-31)×(7.65×10^6) / (1.6×10^-19)(1.10 ×10^-5)
r = (6.9615×10^-24)/(1.76 ×10^-24)
r = 3.96m
