Answer:
Gravity, Friction, Air resistance, magnetism, static electricity
Explanation:
it can travel by curved pipe by reflecting
but one cant see what is on the other side....
mark as brainliest
Explanation:
Answer:
44 years
Explanation:
Use half life equation:
A = A₀ (½)^(t / T)
where A is the final amount,
A₀ is the initial amount,
t is time,
and T is the half life.
0.25 A₀ = A₀ (½)^(t / 22)
0.25 = (½)^(t / 22)
t / 22 = 2
t = 44
Answer:
3.56 mi
Explanation:
from the question we are given the following:
first angle of depression = 22 degrees
second angle of depression = 24 degrees
find the height of the hot air baloon
First we have to take note of the following
- That the distance between two successive mileposts is 1 mile
- The angle of elevation from the mileposts will be 22 degrees and 24 degrees because they are alternate angles with the angles of depression
- I attached a diagram to to illustrate the above points
for the smaller triangle tan 24 = \frac{h}{p}
h = p × tan 24 ... equation 1
for the bigger triangle tan 22 = \frac{h}{p +1}
h = {p +1} x tan 22 ..... equation 2
now equating the two equations for h we have
p x tan 24 = {p+1} x tan 22
0.45 p = 0.4 {p+1}
1.125 p = p + 1
1.125 p - p = 1
p = \frac{1}{0.125} = 8
now we can substitute the value of p into equation 1
h = p x tan 24
h = 8 x tan 24 = 3.56 mi
Answer:
Back spin
Explanation:
A defensive stroke where the ball is struck with a downward and forward motion with a short chopping motion is called Back spin.Backspin is opposite to topspin. Direction of spin imparts and upward force that lift the ball, While a standard strike bounces far forward as up, backspin shots bounce upwards and downwards.