Answer:
20.4375 seconds.
Explanation:
Wattage = Work / time
Work = f * d
F = mass * acceleration
mass = 5000 kg
acceleration = force of gravity
acceleration = 9.81
Force = 5000 * 9.81
Force = 49050 N
Work = F * d
d = 2.5
Work = 49050 * 2.5
Work = 122625 Joules
Wattage = Work / time
time = work / wattage
wattage = 6000 watts
time = 122625 / 6000
time = 20.4375 seconds.
Answer:
A
Explanation:
What you write in your journals should be related to the topic. and it would be useful to look back on.
Refraction occurs when a wave crosses a boundary from one medium to another. A wave entering a medium at an angle will change direction.
Answer:
Minimum aperture diameter, B = 
Given:
Altitude of airplane, l = 29 Km = 29000 m
width, d = 2.0 m
wavelength, 
Solution:
By Reighley criterion, Angle of resolution
is given by:
(1)
Also, separation angle or limiting angle,
(2)
From eqn (1) and (2):


B = 7.96 mm
<h2>
Angular velocity of the second hand on a clock is 0.105 rad/s</h2>
Explanation:
Time taken to rotate 2π radians = 60 seconds
Angular displacement = 2π radians
Time taken = 60 seconds
Angular displacement = Angular velocity x Time
2π = Angular velocity x 60
Angular velocity = 0.105 rad/s
Angular velocity of the second hand on a clock is 0.105 rad/s