Answer:
V1 = 250 mph
V2 = 300 mph
Explanation:
In this case, I will call the plane heading to San Diego as "1" or V1, and the plane heading to San Francisco will be "2" or V2.
Now we know that San Diego is 50 mph slower than San Francisco. So we can actually say that:
V1 = V2 - 50
We know that in half an hour (30 minutes or 0.5 h) both planes are 275 miles apart, this means that the distance is obtained by summing the distance of both planes
If d = V*t then:
d = d1 + d2
replacing the data we have:
275 = (V1*0.5) + (V2*0.5)
Solving for V1:
275 = 0.5V1 + 0.5V2
275 - 0.5V2 = 0.5V1
We also know that V1 = V2 - 50, so if we replace it in the above formula:
0.5(V2 - 50) = 275 - 0.5V2
Then solving for V2:
0.5(V2 - 50) + 0.5V2 = 275
0.5V2 - 25 + 0.5V2 = 275
V2 = 275 + 25
V2 = 300 mph
Now, calculating the value of V1:
V1 = 300 - 50
V1 = 250 mph
Answer:
The acceleration is 5km/h
Explanation:
Given
Initial Velocity (u) = 30km/h
Final Velocity (v) = 50km/h
Time (t) = 4h
Required
Determine the acceleration
This question will be answered using the first equation of motion;
Substitute values for u, v and t
Subtract 30 from both sides
Divide both sides by 4
Hence;
<em>The acceleration is 5km/h</em>
Answer:
2560J
Explanation:
KE= 1/2mv^2 so plug in the numbers to get
KE= 1/2 (80)(8)^2
KE= 2560
Answer:
∅=10.7°
Explanation:
In parabolic motion the position on the x-axis can be found like this.
Where we clear the time.
The position on the y-axis can be found as well.
replacing time.
Now we use the quadratic equation to find the tangent of the angle.
Finally we use the arc tangent function to find the angle.
We choose the second angle because it adapts to the situation described, that is the minimum angle.
The mantle is
the most solid part of the Earth’s interior. The upper mantle is the region
from the crust to depth of 410 km. From here to 660 km is the transition
mantle. In this region the rocks are radically transformed.
<span>After
this the lower mantle begins.</span>