3 years ago

How is a surf formed?

Physics

1 answer:

DerKrebs [107]3 years ago

5 0

A surf forms when waves get too high and "break"

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How does energy move through an ecosystem?

Colt1911 [192]

In an Ecosystem, Energy moves from Lower trophic level to higher trophic levels. Example:

Plants ---> rabbit ---> lion

Hope this helps!

3 0

3 years ago

A sportsman can develop a maximum speed of 12 m/s when he is swimming in a pool. Calculate the time that is required to travel a

kumpel [21]

Answer:

0.48

Explanation:

12m/s

(m/s)

Speed=12

meters=25

25÷12=0.48

6 0

3 years ago

Read 2 more answers

An aircraft is coming in for a landing at 300 meters height when the propeller falls off. The aircraft is flying at 40.0 m/s hor

ArbitrLikvidat [17]

Answer

given,

height = 300 m

speed of aircraft = 40 m/s

propeller rotation = 20 rev/s

moment of inertia = I = 70 Kg/m²

mass = 200 Kg

since no non conservative force act on system, the mechanical energy is conserved after propeller fall off.

by conservation of energy

$E_i = E_f$

$mgh + \dfrac{1}{2}mv_i^2 + \dfrac{1}{2}I\omega^2_i=\dfrac{1}{2}mv_f^2 + \dfrac{1}{2}I\omega^2_f$

as there is no air resistance ωi = ωf

$mgh + \dfrac{1}{2}mv_i^2=\dfrac{1}{2}mv_f^2$

$v_f=\sqrt{v_i^2 + 2gh}$

$v_f=\sqrt{40^2+ 2\times 9.8 \times 300}$

$v_f=86.48\ m/s$

b) the rotation rate of the propeller remains same as there is no air resistance.

8 0

4 years ago

Group 2 and Group 3 stars represent which stages of development? Describe these groups in terms of their relative age, size, bri

gladu [14]

Answer:

it represents group 2 and also it represents the group 3 stars

Explanation:

because i just took it and got it correct.

8 0

3 years ago

a technician connects the red lead of a voltmeter to the b+ [output] terminal of an ac generator and the black lead to the batte

stealth61 [152]

Answer:

He is testing for voltage drop (voltage drop test)

Explanation:

Connecting the red lead of a voltmeter to the B+ output to an ac generator and black lead to a battery +ve terminal measures the voltage drop in the circuit when the engine is turned ON and all electrical accessories too.

with this he knows if the alternator is charging the battery.

8 0

4 years ago