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Nitella [24]
2 years ago
9

4. We use the electromagnetic spectrum to study space by viewing planetary

Biology
1 answer:
SOVA2 [1]2 years ago
7 0

Answer:

To me we wouldn't know as much as we do. There is so much they don't want us to know about space. Just watch the moon at night and you can get a better answer.

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A slice of pizza has 500 kcal. If the pizza is burned and its heat is used to warm a 50-L container of cold water, what would be
Vinvika [58]
Given:
The heat content of the pizza is  Q = 500 kcal 
The volume of the cold water is V = 50 L
The mass of a liter of cold water is 1 kg.

Calculate the mass, M,  of cold water.
M = (50 L)*(1 kg/L) = 50 kg 

The specific heat of water is
c = 4.184 kJ/(kg-K)

Also,
1 kcal = 4184 J, therefore
Q = (500 kcal)*(4184 J/kcal) = 2.092 x 10⁶ J

Let ΔT = increase in temperature of the cold water, °C (same as K).
Then
Q = M*c*ΔT
or 
ΔT = Q/(M*c)
\Delta T =  \frac{(2.092 \times 10^{6} J)}{(50 \, kg)(4.184 \times 10^{3} \,  \frac{J}{kg-K)}) } =10 \,K=10 \,^{o}C

Answer: The temperature increases by 10 °C (or 10 K)
4 0
3 years ago
Based on the golden toad population’s habits, why was extinction of the golden toad puzzling
castortr0y [4]

Answer:

The number of Golden Toads people saw declined from 1,500 to zero in such a short period of time. Scientists suspect that conditions related to climate change was the reason for their extinction

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2 years ago
What process does the bacteria Rhizobium undergo as a benefit to plants?
ratelena [41]
The answer is Nitrogen fixation

Hope it helps and don’t forget to click the thanks button please plz plz plz.
3 0
3 years ago
What type of reproduction is shown in the diagram?
Debora [2.8K]

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2 years ago
A human with the karyotype 49, xxxyy forms _______ barr bodies.
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