<span>The presence of mutualistic ants greatly reduces bacterial abundance on surfaces of acacia leaves and has a visibly positive effect on plant health</span>
Answer:
a)
b)N= 21.29 rpm
Explanation:
Given that
Mass of the ball =m
Length of string = L
Lets take angular speed = ω
The centripetal force on the ball
F = m ω² L
To complete the circle ,at the top condition the force due to gravity should be equal to the centripetal force
Gravity force = mg
F= mg
m ω² L = m g
ω² L = g
When L= 2 m
Lets take g =10 m/s²
ω = 2.23 rad/s
To convert in rpm
N=Speed in rpm
N= 21.29 rpm
Answer:3 is sublimation
Explanation:
It goes from solid straight to gas
Answer:
1300 m/s
Explanation:
Applying,
v = λf/2............... Equation 1
Where v = velocity or speed of wave, f = frequency of wave, λ = wavelength of wave.
From the question,
Given: f = 325 Hz, λ = (12×2/3) = 8 m
Substitute these values into equation 2
v = 325(8)/2
v = 1300 m/s.
Hence the standing wave speed is 1300 m/s
The right option is 1300 m/s
Answer:
6.36*10^-8 N
Explanation:
The magnitude of gravitational force of attraction is usually given by the formula
F = Gm1m2/r², where
F = magnitude of the force required
G = gravitational constant, 6.67*10^-11 m3 kg^-1 s^-2
m1 = mass of the first body, 72 kg
m2 = mass of the second body, 53 kg
r = radius between the bodies themselves, 2 m
Now, when we apply the formula directly, we get
F = (6.67*10^-11 * 72 * 53) / 2²
F = (6.67*10^-11 * 3816) / 4
F = 2.55*10^-7 / 4
F = 6.36*10^-8 N
