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Elden [556K]
3 years ago
12

Darwin observe different species of an animal in separate Galapagos island which did he observe

Physics
1 answer:
MatroZZZ [7]3 years ago
8 0

Answer:

Darwin observed finches

Explanation:

I know that because I learned that in my science class.

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All objects are in motion relative to the sun. <br> a. True<br> b. False
Gre4nikov [31]
That depends on what "objects" refer to.
If "objects" refer to the ones on Earth, then it is TRUE. These objects are in motion relative to the sun same as with Earth itself.

<span>If "objects" refer to the ones outside earth, then it may be a TRUE or FALSE depending on how far or near they are from the sun.</span>
6 0
4 years ago
Landon's new toy arrived in the mail covered in foam packing peanuts. The foam packing peanuts have a mass of 30 g and a volume
gogolik [260]

The formula for calculating <em>density </em>is P=M/V where P is the <em>density</em>, M is the <em>mass</em>, and V is the <em>volume</em>.

The problem gives you the <em>mass</em>, 30g, and the <em>volume</em>, 60cm^3;you can plug those into the equation, which should give you P=30/60.

Your answer should end up being P=0.5 g/cm^3.


WORK:

P=M/V

P=30g/60cm^3

P=0.5g/cm^3

4 0
3 years ago
If a substance has an atomic mass of 20 and has an atomic number of 10, how many neutrons does this element have?
LiRa [457]

Explanation:

This element have 10 neutrons

7 0
2 years ago
A merry-go-round on a playground consists of a horizontal solid disk with a weight
bezimeni [28]

Answer:α = 1.00 rad/s², τ = 90.0 N•m, KEr = 1.12 kJ

Explanation:

m = 795/9.81 = 81.0 kg

ω₁ = 47.79 rev/min(2π rad/rev) / (60 s/min) = 5.00 rad/s

α = (ω₁ - ω₀)/τ = (5.00 - 0.00)/5.00 = 1.00 rad/s²

I = ½mR² = ½(81.0)(1.49²) = 90.0 kg•m²

τ = Iα = 90.0(1.00) = 90.0 N•m

KEr = ½Iω² = ½(90.0)5.00² = 1,124.477 ≈ 1.12 kJ

5 0
3 years ago
Evaluate the efficiency of two identical-looking conveyor belts. Belt A can move a 10 newtons weight one meter in 3 seconds. Bel
LUCKY_DIMON [66]

The Belt A has an efficiency of 50% while the Belt B has an efficiency of 25%

Why?

To calculate the efficiency of the belts, we need to consider that both conveyor belts are identical looking and both weights are equal (10 Newtons).

We need to remember that the formula to calculate work is equal to:

Work=Force*distance(Joule)

Also,

Joules=\frac{Newton}{m}

We know the following:

For belt A,

weight=10N\\time=3seconds\\distance=1meter\\Joule=\frac{N}{m}=\frac{10N}{1m}=10J

For belt B,

weight=10N\\time=3seconds\\distance=2meter\\Joule=\frac{N}{m}=\frac{10N}{2m}=5J

Now, to calculate the efficiencty of the belts, we can use the following formula:

Efficiency=\frac{Work(Out)}{Work(Starting)}*100

We know that for both belts, the starting work was 20 J.

So, calculating we have:

Efficiency_{BeltA}=\frac{10J}{20J}*100=50(percent)

Efficiency_{BeltB}=\frac{5J}{20J}*100=25(percent)

Hence, we can see that The Belt A has an efficiency of 50% while The Belt B has an efficiency of 25%

Have a nice day!

3 0
3 years ago
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