Wave speed is 8 m/s
Explanation:
- Wave speed or speed of the wave is given by the formula
v = distance traveled by the wave/time
- Here, distance traveled = 16 m and time = 2 s
⇒ Wave speed = 16/2 = 8 m/s
Answer:
A = 4.76 x 10⁻⁴ m²
Explanation:
given,
weight of the person = 625 N
weight of the bike = 98 N
Pressure on each Tyre = 7.60 x 10⁵ Pa
Area of contact on each Tyre = ?
total weight of the system = 625 + 98
= 723 N
Let F be the force on both the Tyre
F + F = W
2 F = 723
F = 361.5 N
F = P A
A = 4.76 x 10⁻⁴ m²
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...
"Acceleration" is the rate at which velocity changes.
So "constant velocity" is a very good definition of "no acceleration".
Choice-B is the correct one.
Answer:
After we satisfy our basic needs, they no longer serve as motivators and we can begin to satisfy higher-order needs. Maslow organized human needs into a pyramid that includes (from lowest-level to highest-level) physiological, safety, love/belonging, esteem, and self-actualization needs.
Explanation: