Answer:
1.67 A
Explanation:
Given that,
→ Power (P) = 400 W
→ Potential difference (V) = 240 V
→ Current (I) = ?
The amount of current drawn will be,
→ P = V × I
→ I = P/V
→ I = 400/240
→ I = 1.66666666667
→ [ I = 1.67 A ]
Hence, the current drawn 1.67 A.
Answer:
Explanation:
It is given that,
Mass of the train car,
Initial speed of the train car,
Initial speed of the second car,
After the collision, both cars stick together and move off with a speed of 4.00 m/s, V = 4 m/s
Let is the mass of the second car. It can be calculated using the conservation of momentum. In case of inelastic collision, after collision both objects move with a common speed.
So, the mass of the second car is 33833.33 kg. Hence, this is the required solution.
We can do dimensional analysis in this particular problem. We do as follows:
PEs = 1/2 kx^2
kg . m^2 /s2 [=] k (m)²
The units in the left side should be the same units as the resulting units in the right side.
kg . m^2 /s2 [=] (kg/s²) (m)²
Therefore, the units of k should be kg/s².
Answer:
175 m
Explanation:
Given:
v₀ = 2.4 m/s
a = 0.6 m/s²
t = 20.5 s
Unknown:
Δx
Equation:
Δx = v₀ t + ½ at²
Sub and solve:
Δx = (2.4 m/s) (20.5 s) + ½ (0.6 m/s²) (20.5 s)²
Δx ≈ 175 m
I believe it is "Copernican heliocentrism" :)