Answer:
They would be at where they are for hours after.
Explanation:
Although the motion of the water is appearing to be traveling East, making Johnny think that the wave is actually pushing on the boat East bound, what is really happening here is that the motion of the particles of water is actually moving up and down that propagate to the East. Therefore, the wave would only be pushing the boat up and down, not toward land.
Answer:
Distance = 0.35 miles
Displacement = 0 miles
Explanation:
The distance covered Ryan is the sum of the diatances moved from his house and then back to his house. According to the question, after covering 0.35 miles, Ryan arrived back in his house. Hence, distance covered by Ryan is 0.35 miles.
Displacement refers to overall change in position of an object from a certain starting position.
In the scenario above, Ryan's Displacement from is house will be zero, since ;
Starting position is his house and his final position is his house.
Hence, change in position or distance from his house = 0 miles
Answer:
1.96 J
Explanation:
From the law of conservation of energy
ΔU + ΔK = 0 where ΔU = internal energy change and ΔK = kinetic energy change. We neglect potential energy change since we are not given any information about it.
ΔU = -ΔK
ΔK = K₂ - K₁ where K₁ = initial kinetic energy and K₂ = final kinetic energy = 0 where ΔU = 0.382K₁
= 0.382mv²/2 where m = mass of spike = 0.71 kg and v = initial speed of spike = 3.8 m/s
= 0.382 × 0.71 kg × (3.8 m/s)²/2
= 1.96 J
Answer:
2×10⁻⁷ Ωm
Explanation:
From the question,
R = 4ρL/πd².................... Equation 1
Where R = Resistance of the wire, ρ = resistivity of the wire, L = length of the wire, d = diameter of the wire.
Therefore,
ρ = Rπd²/4L............. Equation 2
Given: R = 1 ohm, ρ = 1×10⁻⁷Ωm
1×10⁻⁷ = πd²/4L.................... Equation 3
If the length and the diameter are doubled, and the resistance remaining constant
ρ' = π(2d)²/4(2L)
Where ρ' = new resistivity
ρ' = 4πd²/8L
ρ' = 2πd²/4L = 2ρ
ρ' = 2(1×10⁻⁷)
ρ' = 2×10⁻⁷ Ωm