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4vir4ik [10]
3 years ago
12

2. True or false? Forensic entomology uses the study of insects to help criminal investigations.

Physics
2 answers:
Snezhnost [94]3 years ago
4 0
I’m pretty sure it’s true lol
kramer3 years ago
4 0
True
Look up the definition, it tells you.
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a rectangular block weighs 240N. The area of the block in contact with the floor is 20cm2 calculate the pressure on the floor
Romashka [77]

Answer:

The pressure on the floor is 12 Pascal(Pa).

Explanation:

Given,

Force (F) = 240N

Area (A) = 20 cm^2

Pressure (P) = ?

we know that,

P = F/A

= 240/ 20

= 12 Pa

8 0
3 years ago
Helppp plssss I am needing help for science and there is a photo pls answer
disa [49]

Answer:

sorry I don't really know :P

Explanation:

7 0
3 years ago
Read 2 more answers
What is the maximum wavelength a photon can have if it is to possess sufficient energy to cause this dissociation?
Alona [7]
I attached the full question.
We need to calculate the enthalpy change first: 
\Delta H=$(247kJ)-(142.3kJ)=+105.2kJ
Keep in mind this is the energy per mole, we need energy per atom:
E=\frac{105200}{6.02 \cdot 10^{23}}
We can see that this reaction needs the energy to get started (enthalpy change is positive).
The energy of a photon is given with this formula:
E=\frac{hc}{\lambda}
We need this photon to have the same energy (or higher) as our enthalpy change:
105.2=\frac{6.62\cdot 10^{-34}\cdot 3\cdot 10^ 8}{\lambda}\\ \lambda=\frac{6.62\cdot 10^{-34}\cdot 3\cdot 10^ 8}{105.2/(6.02\cdot 10^{23})} \\\lambda=1.138\mu m
This wavelenght is clasified as near infrared.


5 0
3 years ago
dopasuj wartości pracy z ramki do przedstawionych sytuacji ,a nastepnie wyraż te prace w dżulach uwaga jedna wartośc pracy nie b
Eduardwww [97]

Answer:

A (samolot) - 200 MJ = 200000000 J

B (dźwig) - 800 kJ = 800000 J

C (podnośnik)-1.6 kJ = 1600 J

Explanation:

Całą część pytania można znaleźć na poniższym schemacie.

Z diagramu załączonego poniżej; mamy

A - samolot lotniczy

B - dźwig

C - podnoszenie ciężarów

Wszyscy to wiemy ;

1kJ = 1000 J

1MJ = 1000000 J

Mamy cztery opcje; i.e 200 MJ, 800 kJ, 1.6 kJ  and 250 mJ

Z czterech opcji można wykluczyć 250 mJ, ponieważ jest to 0,25 J, co przedstawia bardzo niską energię w porównaniu z trzema warunkami pokazanymi na schemacie.

Więc:

A (samolot) - 200 MJ = 200000000 J

B (dźwig) - 800 kJ = 800000 J

C (podnośnik)-1.6 kJ = 1600 J

Największą pracę wykona samolot. Jest tak, ponieważ ma bardzo dużą masę i bardzo dużą prędkość. W związku z tym istnieje potrzeba wytworzenia ogromnej ilości ciepła i energii.

Z drugiej strony żuraw może podnieść ładunek o wiele większy i przewyższa ciężar ciężaru, więc praca wykonywana przez dźwig musi być zdecydowanie większa niż praca ciężarka.

3 0
3 years ago
Low birth rates, death rates are constant
Mariana [72]

1 is b high birth rate and death rate 2 is a low birth rates death are constant and 3 is c high birth rate and low death rate

Explanation:

4 0
3 years ago
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