Mass of the box which contains books (m) = 9.5 kg
Acceleration required (a) = 1 m/s^2
Let the force applied by the teacher and student be F.
The only force acting in the horizontal direction is F and it will produce an acceleration of 1 m/s^2
According to Newton's Seconds law:
F(net) = ma
F = ma
F = 9.5 × 1
F = 9.5 Newtons
Hence, the sideways force applied by teacher and the students is equal to 9.5 Newtons
Answer:
a) 30.84m/s
b) 348.32Hz
c) 32.34m/s
d) 289.69Hz
Explanation:
a) If 1 mile=1609,34m, and 1 hour=3600 seconds, then 69mph=69*1609.34m/3600s=30.84m/s
b) Based on Doppler effect:
/*I will take as positive direction the vector
*/


c) 
d) 
Answer:
- High internal validity as there is good control over all variables
- Allows for precise control over extraneous variables and IV
- Easy to replicate due to standardised procedure
you can choose one of them
hope this can help you
Its A Sap is basically a fluid which is transported in to the xylem tubes.
That's true. The give-away is "observation ... in the real world". That's what "field reports" are.
The part I'm not so sure about is those "entific findings".