Answer: A
Explanation: If you drop an object in the absence of air resistance, it accelerates downward at 9.8 m/s2.
Answer:
D Any of the above depending on the directions of forces.
Explanation:
The net force on the box depends on the direction of the forces.
For example, we have three special cases:
- If the two forces are in the same direction, they add to each other, so the net force is
F = 10 N + 10 N = 20 N
- If the two forces are in opposite directions, the net force is given by the difference between the two forces, so
F = 10 N - 10 N = 0 N
- If the two forces are perpendicular to each other, their resultant is given by the Pythagorean theorem:
If the two forces are at any other angle, their resultant can be found by resolving each force along the x- and y- direction, and adding the components along each direction. The resultant net force will have a magnitude between 0 N and 20 N.
Answer:
D. of irregular pitch.
Explanation:
~Music has a pleasing effect on mind and ears. Noise, on the other hand appears to be pretty irritating and is basically a nuisance.
~Music usually has a high frequency. It also exhibits a recognizable pattern of changes in amplitude as well as wavelength. Noise, on the other hand exhibits lower frequency, irregular wavelengths and also produces sudden changes in wavelength and amplitudes.
~Music is actually a combination of harmonics and frequencies. Noise on the other hand, has no such properties.
~Noise is considered “chaos” and music is harmony.
~Music is very soothing to listen to while noise is wild as well as untamed.
~Music can be considered to be some form of organized noise, a special category of noise. On the other hand, it can be said that noise is basically nothing but sounds in random having no order or rhythm.