All categories

3 years ago

Can Anyone Some one Help me with these three Questions PLEASE!!!!

Physics

1 answer:

pentagon [3]3 years ago

4 0

1) is the first one : the populations become adapted to different environments and eventually become so different that they cannot interbreed to produce fertile offspring

2) is the third one : they have identical physical characteristics

3) is the second one : the populations are isolated and thus do not interbreed .

hoped it helped !!!

You might be interested in

A -4.33x10^-6 charge is placed a certain distance from a -7.81x10^-4 C charge. Their electric potential energy is 44.9 J. How fa

KATRIN_1 [288]

Answer:

0.67709

Explanation:

6 0

3 years ago

What is the latent power in the source

levacccp [35]

Answer:What?

Explanation:

4 0

3 years ago

PLEASE HELP BRANILIEST

frozen [14]

Answer: It’s Fiberglass

5 0

3 years ago

Read 2 more answers

The tip of the fan blade is 0.61 m from the center of the fan. The fan turns at a constant speed and completes 2 rotation every

Goryan [66]

Answer:

What is the centripetal acceleration of the tip of the fan blade?

6.0 m/s2

48 m/s2

53 m/s2

96 m/s2

Answer is 96

Explanation:

5 0

4 years ago

the pilot of a new stealth helicopter which has a mass of 15000 kg and was traveling 180 m / s accelerated to 250 m / s in six s

MariettaO [177]

Answer:

pf = 3750000 kg.m/s

F = 175000 N

Explanation:

Constant Acceleration

An object moves with constant acceleration if its velocity changes uniformly in time.

If we call vo to the initial speed, vf the final speed, and t the time, then the acceleration is calculated as:

$\displaystyle a=\frac{v_f-v_o}{t}$

The new stealth helicopter was traveling at vo=180m/s and changed to vf=250 m/s in t=6 seconds, thus the acceleration was:

$\displaystyle a=\frac{250-180}{6}$

$a=11.67~m/s^2$

Please note this number is shown rounded to the nearest hundredth, but it was stored in the calculator's memory with full precision. This fact affects the next calculation as will be noted below.

The acceleration must be produced for some net force that can be calculated by:

F = m.a

Where m=15000 Kg is the mass of the helicopter. Thus:

F = 15000 * 11.67

F = 175000 N

The above product would lead to the inaccurate result of 175050 if the acceleration would have not used with its full representation in the calculator's memory.

The momentum of an object of mass m and velocity v is:

p = m. v

The final momentum of the helicopter is:

pf = m.vf = 15000*250 m/s

pf = 3750000 kg.m/s

Note: When performing calculations over intermediate results, it's important to keep them as accurate as possible to preserve the accuracy of the final result.

6 0

3 years ago