Answer:
The answer is 200N.
Explanation:
Force=MA
m=mass
a=acceleration
Let's plug in our numbers into the equation:
20x10 = 200
Since force is measured in newtons, the answer is 200 newtons. (N)
The wavelength of the radio broadcast wave given the data is 3.10 m (Option B)
What is wavelength?
ThisThis is simply defined as the distance between two successive crests or trough
Relationships between frequency, wavelength and velocity
The velocity, frequency and wavelength of a wave are related according to the following equation
Velocity (v) = wavelength (λ) × frequency (f)
v = λf
How to determine the wavelength
Velocity (v) = 3×10⁸ m/s
Frequency (f) = 9.67×10⁷ s⁻¹
Wavelength (λ) =?
λ = v /f
λ = 3×10⁸ / 9.67×10⁷
λ = 3.10 m
Learn more about wave:
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R e s i s t a n c e F o r c e
Answer: acceleration a = 25m/s^2
Explanation:
Given that:
The plane travels with constant acceleration
x1 = 241.22 m at t1 = 3.70 s
x2 = 297.60 m at t2 = 4.20 s
x3 = 360.23 m at t3 = 4.70 s.
We need to calculate the velocity in the two time intervals.
Interval 1:
Average Velocity v1 = ∆x/∆t = (x2 - x1)/(t2-t1)
v1 = (297.60-241.22)/(4.20-3.70) = 112.76m/s
Interval 2:
Average Velocity v2 = ∆x/∆t = (x3-x2)/(t3-t2)
v2 = (360.23-297.60)/(4.70-4.20)
v2 = 125.26m/s
Acceleration:
Acceleration a = ∆v/∆t
∆v = v2-v1 = 125.26m/s-112.76m/s = 12.5m/s
∆t = change in average time of the two intervals = (t3-t1)/2 = (4.70-3.70)/2 = 0.5s
a = 12.5/0.5 = 25m/s^2
Density= mass/volume
in this case density= 1.1g
and the volume = 40 cm^3
so
1.1=40/mass
mass=40/1.1
mass=36.4
