Answer:
1110 N
Explanation:
First, find the acceleration.
Given:
Δx = 300 m
v₀ = 85.5 km/h = 23.75 m/s
v = 0 m/s
Find: a
v² = v₀² + 2aΔx
(0 m/s)² = (23.75 m/s)² + 2a (300 m)
a = -0.94 m/s²
Find the force:
F = ma
F = (1180 kg) (-0.94 m/s²)
F = -1110 N
The magnitude of the force is 1110 N.
Answer:
0.09kg of air
Explanation:
The dimensions of the room are given
change the height to meters by dividing it by thousand.
For the volume multiplying the length,width and height (all should be in the same unit most suitable being meters).
Volume refers to the amount of space inside a box or a object.
The amount of air is equal to the volume.
Answer:
6. 9.4 m
7. 1050 m/s.
Explanation:
6. Determination of the wavelength
Velocity (v) = 30 m/s
Frequency (f) = 3.2 Hz
Wavelength (λ) =?
v = λf
30 = λ × 3.2
Divide both side by 3.2
λ = 30 / 3.2
λ = 9.4 m
Thus, the wavelength of the wave is 9.4 m.
7. Determination of the speed of the wave.
Wavelength (λ) = 350 m
Frequency (f) = 3 Hz
Velocity (v) =.?
v = λf
v = 350 × 3
v = 1050 m/s
Thus, the speed of the wave is 1050 m/s
Answer:
Explanation:
F = G*m1 * m2 / r^2
G = 6.67408 × 10-11 m3 kg-1 s-2
r = 15 m
F = 4.60 * 10^-6 N
m1 = m2 = m
F = 6.67 * 10^-11 * m^2 / 15^2
4.60 * 10^-6 = 6.67 * 10^-11 * m^2 / 225 Multiply both sides by 225
4.60*10^-6 * 225 = 6.67*10^-11 * m^2
.001035 = 6.67408 × 10-11 * m^2 Divide by 6.67408 × 10-11
0.001035/ 6.67408 × 10-11 = m^2
m^2 = 15507755 Take the square root of both sides
m = sqrt(15507755 )
m = 3938 kg
Answer:
Copper is the logical material for solar energy systems because:
[1] It has the best thermal conductivity of all engineering metals;
[2] Highly resistant to corrosion;
[3] Easy to fabricate
[4] Has been used both for plumbing and for roofs since metals were first employed in those applications.
For water heating and low-pressure steam, use of Type M tubes is recommended.
