Answer:

Explanation:
Height of the cliff is given as

now the time taken by the diver to hit the surface is given as



Now in the same time it has to cover a distance of 13.39 m
so the speed in horizontal direction is given as



Explanation:
a triple beam balance can measure the mass of one slice of bread
Answer:
a) 
b) 
c) 
Explanation:
Given:
- voltage of the battery,

- energy storage capacity of the battery,

- speed of the car,

a)
power drawn by the car, 
<u>Now the Current delivered to the motor:</u>
we the relation between the power and electrical current,



b)
<u>Distance travelled before battery is out of juice:</u>
we first find the time before the battery runs out,



Now the distance:



c)
When the head light of 55 W power is kept on while moving then the power consumption of the car is:



<u>Now the time of operation of the car:</u>



<u>Now the distance travelled:</u>



Answer:
as the period decreases, the frequency and energy of the wave increase
Explanation:
Electromagnetic waves are oscillations of the electric and magnetic fields, described by maxwell's equations, the speed of the wave is called the speed of light
c = λ f
E = E cos (kx - wt)
Angular velocity is related to frequency and period.
w = 2π f = 2π / T
Let's analyze what happens when the wave period decreases, angular velocity and frequency increase.
This increase in frequency is reflected with the Planck equation in wave energy
E = h f
Therefore the wave carries more energy and can lead to stronger interactions with matter.
In summary, as the period decreases, the frequency and energy of the wave increase
C. National Park Planning
Biodiversity - <span>the variety of life in the world or in a particular habitat or ecosystem.
Clear cutting and oil drilling both decrease the variety of life, destroying habitat around them.
Farming decreases biodiversity because it decrease the variety of flora in that area, depending on what crop is planted.</span>