3 years ago

All the interconnected paths of energy flowing from species to species in an ecosystem is called a

Physics

2 answers:

kondor19780726 [428]3 years ago

7 0

Answer: d

Explanation:

MAXImum [283]3 years ago

4 0

D is the correct answer .

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During take-off a 5kg model rocket, initially at rest, burns fuel for 4.6s causing its speed to increase from rest to 39m/s duri

MrRa [10]

Answer:

The height is "89.61 m". A further explanation is given below.

Explanation:

According to the question,

Mass of rocket,

m = 5 kg

Time,

t = 4.6 s

Initial speed of rod

u = o m/s

Final speed,

v = 39 m/s

drag,

= 60 N

So,

⇒ acceleration, $a=\frac{v-u}{t}$

$=\frac{39-0}{4.6}$

$= 8.478 \ m/s^2$

⇒ $F_{net}= Net \ force$

$=ma$

$=5\times 8.478$

$=42.89 \ N$

Now,

The thrust will be:

⇒ $Thrust-weight-drag=Net \ force$

⇒ $Thrust-(5\times 9.8)-60=42.89$

⇒ $Thrust-49-60=42.89$

⇒ $Thrust-109=42.89$

⇒ $Thrust=42.89+109$

⇒ $Thrust=151.89 \ N$

The height will be:

⇒ $h=\frac{1}{2} at^2$

$=\frac{1}{2}\times 8.47\times (4.6)^2$

$=\frac{1}{2}\times 8.47\times 21.16$

$=89.61 \ m$

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3 years ago

Which ramp requires the least amount of force?

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Which of the following information does the electromagnetic spectrum tell us?

Elodia [21]

A: the wavelength of a wave

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Why does your hand feel cool if you spill some alcohol on it?

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<span>It takes heat to make something evaporate, so it takes heat from your arm. Alcohol easily evaporates at room temperature, so it feels cool. This is also why you feel cool when getting out of the pool. The water on your skin evaporates.

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An electric appliance is connected by wires to a 240-volt source of voltage. If the combined resistance of the appliance and wir

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Voltage=V=240V
Resistance=R=12ohm
Current be I

Apply ohms law

V=IR
240=12I
I=240/12
I=20A

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2 years ago