Answer:
d = 220 m (2 s.d.)
Explanation:
If the arrow flies over a horizontal plain and air resistance is ignored.
The time of flight is twice the time that gravity takes to reduce initial vertical velocity to zero
t = 2(47sin37)/9.8 = 5.7725... s
Range is the time of flight times the initial horizontal velocity.
d = (47cos37)5.77 = 216.676...
The answer is A. Sees more intense wavelengths reaching the surface
Answer:
Explanation:
To find the amplitude of the sound, we must first determine the wavelength and the phase difference between the two speakers.
For the wavelength;
Recall that, the separation between two successive max. and min. intensity points are
Thus; for both speakers; the wavelength of the sound is:
λ = 80 cm
The relation between the path difference(Δx) and the phase difference(Δ∅) is:
where;
Δx = 10 cm
λ = 80 cm
Δ∅ = π rad
∴
Suppose both speakers are placed side-by-side, then the path difference between the two speakers is: Δx = 0 cm
Thus, we have:
∴
The amplitude of the sound wave if the two speakers are placed side-by-side is:
A = 0.765a
Answer:
0.5N/kg
Explanation:
use formula:
F = m.a
500= 1000 × a (divide by 1000 on both sides)
0.5 =a
a) Gravitational force only
b) Normal force only
c) Gravitational force, normal force, and frictional force
d) Gravitational force and normal force