Answer:175.42m/s
Explanation:
Wavelength=0.49m
Frequency=358Hz
Velocity=frequency x wavelength
Velocity=358x0.49
Velocity=175.42m/s
Answer:
a 
10.6 m/s²
Explanation:
Since F = ma (Force = mass * acceleration), acceleration would be...
a = F/m
a = 302 N/28.6
a 10.6 m/s²
Yep, uh-huh, indeed, indubitably, and you better believe it.
The ball did accelerate.
Acceleration means any one of these:
-- speeding up
-- slowing down
-- changing direction .
The direction of the ball changed from east to west.
That's acceleration right there.
_____________________________________
Acceleration means any change of velocity.
Velocity is speed and direction.
The velocity of the ball changed from (40 km/hr east) to (40 km/hr west).
The change in velocity was 80 km/hr to the west.
S=7400mi
t=3 min= 0.05h
v=7400mi/0.05h
v=148000mph
Answer: ratio = 3.14 × 10³⁵
Explanation:
From Newtons law of Universal Gravitation;
Every object in the universe is attracted to every other object
F = (Gm₁m₂)/r²
G = 6.67 X 10⁻¹¹ N-m²/kg²
M₁= mass of one object
M₂= mass of second object
r = distance from center of objects
q = charge = 3.2 x 10⁻¹⁹C.
- Calculating the gravitational force;
Fg = (Gm₁m₂)/r² = (Gm²)/r²
which is = (6.67×10⁻¹¹ × (6.64×10⁻²⁷)²) / r²
= (2.94 × 10⁻⁶³) / r²
- Calculating the electric force;
Fe = (Kq₁q₂) / r² = K q² / r² = (9×10⁹ × (3.2 × 10⁻¹⁹)² / r²
Fe = 9.22 × 10⁻²⁸ / r²
comparing the ratio of both forces we have;
Fe/Fg = (9.22×10⁻²⁸/r²) ÷ (2.94×10⁻⁶³/r²)
r² cancels from the above expression, which gives;
ratio as 3.14 × 10³⁵
