Psychoactive drugs interact with which alter a persons mood,perception and behavior

Please help on this one?

vlada-n [284]

Answer:

idk

Explanation:

7 0

3 years ago

Flag question

anastassius [24]

Answer:

P = density (p) * g * h

P = 1000 kg/m^3 * 9.8 m/s^2 * 40 m = 392,000 N/m^2

since kg m / s^2 = Newtons

The average pressure is 1/2 (pressure at 0m + pressure 80 m) for liquid of uniform density

3 0

3 years ago

How much thermal energy is added to 1.5 kg of ice at -20°C to convert it to water at 0°C? Specific heat for ice is 2060 J/kg.°C

defon

Answer:562800

Explanation:

mcT+Qmelt

5 0

3 years ago

The power of a lens is defined as the reciprocal of its focal length: P = 1/f. (Thus power is measured in inverse meters, called

Len [333]

Answer:

This the power of combination is given by

$P_{combination}=\frac{1}{F}=\frac{d+f_{2}-f_{1}}{f_{2}(d-f_{1})}$

Explanation:

Let 'F' be the focal length of the combination of the two lenses and the focal length's of individual lenses be $f_{1},f_{2}$

We know that focal length is the position of image when object is placed at infinity

Let us place the the object at infinity with respect to the first lens thus the position of image formed by the first lens shall be obtained using lens formula as

$\frac{1}{f_{1}}=\frac{1}{u}+\frac{1}{v}$

Applying values we get

$\frac{1}{f_{1}}=\frac{1}{\infty }+\frac{1}{v}\\\\\Rightarrow \frac{1}{f}=0+\frac{1}{v}\\\\\therefore v=+f_{1}$

Now this position of image formed by the first lens act's as object for the second lens, thus we have

$\frac{1}{f_{2}}=\frac{1}{-(d-f_{1})}+\frac{1}{v}\\\\\Rightarrow \frac{1}{f_{2}}+\frac{1}{d-f_{1}}=\frac{1}{v}\\\\\therefore \frac{1}{v}=\frac{(d-f_{1})+f_{2}}{f_{2}(d-f_{1})}\\\\=\frac{1}{v}=\frac{d+f_{2}-f_{1}}{f_{2}(d-f_{1})}\\\\\therefore v_{f}=\frac{f_{2}(d-f_{1})}{d+f_{2}-f_{1}}$

Since image of an object placed at infinity will be formed at $v_{f}=\frac{f_{2}(d-f_{1})}{d+f_{2}-f_{1}}$ thus the focal length of the combination of the 2 thin lenses will be $F=\frac{f_{2}(d-f_{1})}{d+f_{2}-f_{1}}$

This the power of combination is given by

$P_{combination}=\frac{1}{F}=\frac{d+f_{2}-f_{1}}{f_{2}(d-f_{1})}$

(For the sake of question we assume lenses to be convex although the same procedure is valid for all other lenses)

5 0

4 years ago

Describe an experiment to show that pressure increases with the decrease in the area of surface

cluponka [151]

Answer:
press a baloon against one pin it bursts
but now arrange lot of pins parallel closely to each other if u press a baloon against them it does not burst hope this helps u

7 0

3 years ago