The moon's gravity, combined with the waltz of Earth and the moon around their center of mass, forces the oceans into an oval shape, with two simultaneous high tides. ... If the moon were half its mass, then the ocean tides would have been correspondingly smaller and imparted less energy to it.
Answer:
13 m/s
Explanation:
Given:
Δy = 8.2 m
v₀ = 0 m/s
a = 9.8 m/s²
Find: v
v² = v₀² + 2aΔy
v² = (0 m/s)² + 2 (9.8 m/s²) (8.2 m)
v = 12.7 m/s
Rounded to two significant figures, the speed is 13 m/s.
Answer:

b)

Explanation:
Let the amplitude of SHM is given as A
so the total energy of SHM is given as

now we know that
a)
kinetic energy is given as

here

so now we have


now its fraction with respect to total energy is given as

b)
Potential energy is given as

so we have

so fraction of energy is given as

Answer: The size of the whale can be estimated by using echo Sounder or Sonar
Explanation:The researchers and physicst uses the knowledge of reflection of sound in water or echo to solve a lot of puzzle under water , including calclulating the distance and size of objects like fish,sunk ship,etc
The sonar is able to receive the signals from the whales and the succesive echoes that follows when placed in a strategic position in the water in the path of the whale .
The sonar has a traducers which has both a transmitter and a receiver,so it receives pulses from the whale and transmit back same echo back to the whale and to the bottom of the sea.
Using the speed of sound underwater and time taken for succesive echoes of pulses ,it can calculate with the precision the location of the whale while the image of the whale is also capture by the traducers to determine the size.
Answer:
c) are economically valuable services provided by natural systems is the correct answer.
Explanation:
- Ecosystem services are methods that happen in an ecosystem.
- Ecosystem services are the abundance of advantages that nature gives to society and humankind.
- Ecosystem services make the individual life pleasant via producing nutritious food and cleaned water, controlling disease, oxygen generation, soil formation, biomass production and giving social and spiritual advantages.