Answer:
y = 60 mph
Explanation:
given,
average speed of Sarah driving from Orlando to Tampa = 30 mph
average speed of return = ?
whole trip average speed = 40 mph
now,
Let x be the distance from Orlando to Tampa
y be the speed of return
60 + 2 y = 3 y
y = 60 mph
hence, speed of the return is equal to 60 mph.
Answer:
Explanation:
First, we have to calculate the maximum height reached by the object. We use the equations of uniformly accelerated motion:
In order to calculate this, we have to know the time taken by the object to reach the maximum height:
Now, we can calculate y:
Now, we calculate the time taken by the object in free fall:
Finally, adding and , we get the total time until the object impacts the ground:
Those stitches are what "chews" into
the wind when you like to throw a breaking ball. Additionally, a knuckleball
that barely spins eats at the wind using the stitches on the ball and this
enables it to drop, sail or rise.
<span>In short, the stitches makes the ball air
resistant or cut into air making it faster.</span>
Answer:
As sound waves move (or more accurately, when they travel by transferring their energy) they interact with physical objects. Soft surfaces will absorb sound while hard surfaces will reflect it. .Hard surfaces reflect sound and soft surfaces absorb sound.
The convex mirror has a reflecting surface that curves outward, resembling a portion of the exterior of a sphere. Light rays parallel to the optical axis are reflected from the surface in a direction that diverges from the focal point, which is behind the mirror