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2 years ago

An atom with a positive charge is an anion. a. true b. fals

Physics

1 answer:

Aleksandr-060686 [28]2 years ago

4 0

B. False.

An atom with a positive charge is a cation, not anion.

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An older camera has a lens with a focal length of 60mm and uses 34-mm-wide film to record its images. Using this camera, a photo

lesya692 [45]

Answer:

24.71 mm

Explanation:

Distance is proportional to focal length, so

d∝f

which means

$\frac{d'_1}{d'_2}=\frac{f_1}{f_2}$

Magnification of first lens

$M_2=-\frac{d'_1}{d_1}$

and

$M_2=\frac{h'_1}{h_1}$

Similarly, magnification of second lens

$M_2=-\frac{d'_2}{d_1}$

and

$M_2=\frac{h'_2}{h_1}$

From the above equations we get

$\frac{M_1}{M_2}=\frac{d'_1}{d_2'}$

and

$\frac{M_1}{M_2}=\frac{h'_1}{h_2'}$

which means,

$\frac{d'_1}{d_2'}=\frac{h'_1}{h_2'}$

and

$\frac{d'_1}{d_2'}=\frac{f_1}{f_2}$

So, we get

$\frac{f_1}{f_2}=\frac{h'_1}{h_2'}\\\Rightarrow f_2=f_1\times\frac{h_2'}{h'_1}\\\Rightarrow f_2=60\times\frac{14}{34}=24.71\ mm$

∴ Focal length should this camera's lens is 24.71 mm

6 0

3 years ago

What is the magnitude of the electric force on an electron in a uniform electric field of strength 2050 n/c that points due east

erastova [34]

Given E=2050 N/C

charge of an electron = 1.6×10^-19 C

USING E = F/Q , electric field = force ÷ charge

2050 = F ÷ (1.6×10^-19)....

make F subject of formula and get the answer

3 0

3 years ago

Please help<br> list real-world examples of the different types of stimuli

ra1l [238]

Answer:

You are hungry so you eat some food.

A rabbit gets scared so it runs away.

You are cold so you put on a jacket.

A dog is hot so lies in the shade.

It starts raining so you take out an umbrella.

6 0

2 years ago

The ______ clause in an if statement allows a program to make one choice if the condition is true, and anothere choice if the co

Inessa [10]

Answer: The IF clause.

Explanation: This is the IF clause; you can use it as:

IF (something = true) then "something happens"

else "other thing happens"

Some example of it can be, suppose that your program reads a number X that the user inputs, then you can do:

If ( X > 5) then

print: "the number X is bigger than five"

Else

print: "the number X is smaller than five"

Where, of course, the statements depend on the language used, but the "if" clause works almost the same in every language.

3 0

2 years ago

A future space explorer has been kidnapped and is held prisoner on a planet in our solar system. With nothing else to do, our pr

DIA [1.3K]

To develop this problem we will apply the linear motion kinematic equations. Specifically, the second law that describes the position of a body as a function of its initial velocity, time and acceleration.

$y = ut+\frac{1}{2}gt^2$

Here,

u = Initial velocity

t = Time

g = Acceleration due to gravitation

If we replace the values to find the gravitational acceleration we have then,

$1.7m = 0+\frac{1}{2} g*0.36^2$

$g= 26.2346m/s^2$

Recall that the force of gravity on the planet Jupiter is 24.79 m / s² so the measure is closer to this planet. It is likely that you are in Jupiter.

4 0

3 years ago