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adell [148]
3 years ago
14

A threatened species is a species whose population is at risk of extinction.True or false

Physics
1 answer:
sveticcg [70]3 years ago
4 0
The answer is true i just answered it on me test
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The principles used to solve this problem are similar to those in Multiple-Concept Example 17. A 205-kg log is pulled up a ramp
malfutka [58]

Answer:2538.43 N

Explanation:

Given

Mass of Log=205 kg

Ramp angle=25^{\circ}

Coefficient of Friction=0.855

log acceleration=0.647 m/s^2

Let T be the Tension

T-mgsin\theta -f_r=ma

Here f_r=frictional\ Force=\mu N=0.855mgcos\theta =1556.76 N

T=mgsin25+m\times 0.647+1556.76

T=849.04+132.63+1556.76=2538.435 N

8 0
3 years ago
a skater increases her speed uniformly from 2.0 m/s to 10 m/s in 3.0s. what is the acceleratioon of the biker?
sergey [27]

Answer:

a= 2.667 m/s²

Explanation:

Given that

Initial velocity ,u= 2 m/s

Final velocity ,v= 10 m/s

Time taken ,t= 3 s

As we know that

v =  u +  at

a=Acceleration ,u=Initial velocity ,v= Final velocity ,t=time

Now by putting the values in the above equation

v =  u +  at

10 = 2 + a x 3

8 = 3 a

a=\dfrac{8}{3}\ m/s^2

a= 2.667 m/s²

Therefore the acceleration of the biker will be 2.667 m/s²

5 0
4 years ago
Suppose we repeat the experiment from the video, but this time we use a rocket three times as massive as the one in the video, a
aliina [53]

Answer:

2/3

Explanation:

It is important to bear in mind that momentum is generated by the fluid. Momentum is proportional to the mass and velocity, therefore increasing the mass(density) of the liquid by a factor of 2, while the velocity is constant, increases the momentum of fluid (and rocket) by 2. For any closed system, the momentum is conserved. With that in mind, the momentum of the fluid is equal to but opposite in direction to the momentum of the rocket. Velocity of the rocket given by v=p/m (Where p=momentum of the rocket initially and m is its initial mass). The mass of the rocket increases 3 times. So....

Initially:

vi=p/m

Now:

vf=2p/3m

<h3>The ratio is given by:</h3>

vf:vi = 2p/3m:p/m

8 0
4 years ago
Defind wave.then explain how vibrations,waves,and energy are related to sound
vagabundo [1.1K]
Waves are either transversal stereotypical pictures of waves or longitudinal it goes in rings waves are just different forms of vibration of any kind of energy
7 0
3 years ago
Read 2 more answers
Which is NOT true about a protostar?
jek_recluse [69]

Answer:

D

Explanation:

D it generates pressure by fusing hydrogen.

4 0
3 years ago
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