Answer:
frequency = 14 Hz
wavelength = 3 m
speed = ?
speed = frequency
x wavelength
speed = 14 x 3speed = 42 meter per second
Explanation:
PE = mgh
where
m = mass
g = acceleration due to gravity
h = height
Answer:
B.
Venus is the same size and density.
Explanation:
It is becuase venus has the same size and density as earth
Answer:
Acceleration = 311.2 Km/hr²
Explanation:
Given: Radius of the Orbit r= 3.56 × 10⁶ km
Period of the orbit = 28 days = 672 hrs
Sol: We have Fc = MV²/r
⇒M ac = MV²/r
⇒ac = V²/r
First we have to Speed V so for this we have to find the circumference ( distance covered by the moon in one orbit)
⇒ Circumference= 2 π r
= 2 × 3.13149 × 3.56 × 10⁶ km
= 22,368,139.69 Km
Now Speed = Distance /time
Speed = 22,368,139.69 Km / 672 hrs
Speed V = 33,285.92 Km/Hr
Now
ac = V²/r = (33,285.92 Km/hrs)² / 3.56 × 10⁶ km
ac = 311.2 Km/hr²
