Answer:
It is less than 25m/s as the correct average is 24m/s.
Explanation:
This is becuase you need to take the average of the two speeds (18m/s and 30m/s) 18 + 30 divided by 2 is 24m/s.
Tge distance from the end of the conduit should you put the mark that will line up with the bender arrow would be B. 9 inches.
Answer:
0.281 m
Explanation:
From vᵧ = uᵧ - gt
where vᵧ = final vertical component of the velocity
uᵧ = vertical component of the initial velocity = 2.5 m/s
g = 9.8 m/s²
At maximum height, vᵧ = 0 m/s
So,
Time to reach maximum height, t = uᵧ/g = 2.5/9.8 = 0.255 s
Total time of flight, T = 2 × time to reach maximum height
T = 2 × t = 2 × 0.255 = 0.510 s
Range of the cannon = uₓ T = 0.55 × 0.510 = 0.281 m
Note uₓ = horizontal component of the initial velocity.
Answer:
D: The hydrogen bonds between water molecules are more cohesive in the liquid state than in the solid state.
Explanation:
If we assume that there is no phase change due to heating, we know that the temperature change will be proportional to the mass heated, being the proportionality constant that is a quantity which depends on the material, and also represents the resistance of the material to cause a change in the temperature and is called specific heat.
Now, if we are to assume that the mass is the same for the three phases, and that the amount of heat supplied is also the same, the phase with the highest specific heat will therefore possess the lowest temperature change.
At a lower temperature, the hydrogen bonds will be more cohesive than at higher temperatures.
We are told that in it's solid state, it has a specific heat capacity of 2.093 J/g°C while in its liquid state, it has a specific heat capacity of 4.186 J/g°C.
Thus, the hydrogen bonds between water molecules in the liquid state will be less cohesive than in its solid state.
According to Louis de Broglie, as the momentum of a moving particle is tripled, the corresponding wavelength changes by 1/3. De Broglie’s wavelengths of particles that are moving are varying in accordance with their linear momentum. De Broglie’s wavelength is inversely proportional to the linear momentum (λ = h/p).
