Answer:
0.655 m
13.468°C
Explanation:
v = Speed of sound at 20.0°C = 343 m/s (general value)
For one both end open we have the expression

The length of the flute is 0.655 m
Beat frequency is given by

Velocity of the wave is

The temperature is given by

The temperature of the room is 13.468°C
Answer:
D. momentum
Explanation:
Momentum is the product of velocity and mass which is the two variables the paragraph talked about.
Displacement is the area under the velocity/time graph. So for example this object's displacement in the first 3 seconds is (1/2)(3sec)(12.5 m/s)= 18.75m. (and then it starts backing up, displacement decreasing, after 3sec when velocity is negative).
But This object is never speeding up. Its velocity is smoothly decreasing at (25/6) m/s^2 (the slope of the graph). So the answer to the question is actually zero.
Answer:2.87
Explanation:
Given
mass of force=25 N
mass of box=5 kg
coefficient of kinetic friction 
Acceleration of box will be provided by its cos component and friction try to oppose it
Normal reaction

friction force
net force in horizontal direction

