Answer:
310 N
Explanation:
To overcome the force of chihuahua you will need 10 N and to accelerate at a rate of 3 m/s² you will need 100×3 = 300 N. Altogether 310 N.
By Newtons second law, F = ma
and the force required to for the acceleration of your body can be calculated as,
F = 100×3 = 300 N
Also you need to overcome the mighty canine, so you will need 1O N to pull back your leg from it.
A) heterogeneous mixture & I believe B?
I know A is correct though
Answer:
DL = 0.0105 [m] = 10.57 [mm]
Explanation:
To solve this problem, we use the following equation that involves length changes depending on temperature changes.
where:
DL = length change
α = thermal expansion coefficient = 11 * 10^(-6) [1/°C]
DT = temperature change = (37-6) = 31 [°C]
L = nominal or initial length = 31 [m]
DL = 11 * 10^(-6) * 31 * 31
DL = 0.0105 [m] = 10.57 [mm]
Answer:
The frequency heard by the observer is 2760.73 hertz. Explanation:
Frequency of source, f = 2640 Hz
Velocity of source,
The speed of sound, v = 343 m/s
Let f' is the frequency heard by the observer. According to Doppler's effect, the frequency of the observer is given by :
(as the source is moving towards observer)
f' = 2760.73 Hz
So, the frequency heard by the observer is 2760.73 hertz. Hence, this is the required solution.