Answer and Explanation:
As per the question:
When the stone is thrown from the cliff top and hits the ground below eventually:
R = 
where
= initial velocity
H = height
g = acceleration due to gravity
R = horizontal Range
Now,
(a) Displacement of the stone is given by the horizontal range:
R =
where
= initial velocity
H = height
g = acceleration due to gravity
R = horizontal Range
(b) Speed just prior to the impact is given by the third equation of motion:
where
v = final velocity
(c) Time of flight is given by the second eqn of motion where the initial velocity is considered to be 0 then:
T = 
Answer:
Explanation:
Given:
- length of the concrete slab,
- temperature of observation,
- we've the coefficient of linear expansion for concrete,
- lower temperature limit,
- upper temperature limit,
<u>Change in length due to temperature can be given as:</u>
<u>Now at temperature 15°C:</u>
Hence the expansion crack between the slabs at this temperature must be:
Density=mass divided by volume, so d=120g/7ml
Answer:
B: precipitation seeping through pores and cracks in the ground
Explanation:
Man made wells aren't the main source because their isn't enough of them and morning dew doesn't go in to the ground in one main source.
