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Mekhanik [1.2K]
2 years ago
13

What happens to light when it is shone through concave lenses? (1 point)

Physics
2 answers:
Svetach [21]2 years ago
4 0
It has to be,b cause ik.
Nadusha1986 [10]2 years ago
3 0
It would be a.,.,.,.,.
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If 2.0 x 10^-4 C charge passes a point in 5.0 x 10^-5 s, what is the rate of current flow?
insens350 [35]
Current is defined as the rate of charge flowing a point every second. Having a current of 1 Ampere signifies 1 Coulomb is flowing in a circuit every second. It is measured by the use of an ammeter which is positioned in series to the component to be measured. The current in the problem is calculated as follows:

I = 2.0 x 10^-4 C / 5.0 x 10^-5 s
<span>I = 4 A or 4.0 x 10^0 A</span>
3 0
3 years ago
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NemiM [27]

Answer:

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3 0
2 years ago
Two charged spheres are 20cm apart and exert an attractive force of 6x10^-9 N on each other. What will be the force of attractio
Travka [436]
The force of attraction between 2 charged spheres can be explained by Coulomb's law,
It states the force of attraction is directly proportional to the magnitudes of the charges and inversely proportional to the square of the distance between the charges.

/F =  \frac{k q_{1}  q_{2} }{ r^{2} }
where F - force of attraction/repulsion
q₁ and q₂ - charges of the 2 spheres 
k - Coulomb's law constant
r - distance between the spheres

In the question given, the charges of the spheres remain constant in both instances, only distance changes. Therefore (kq₁q₂) = c which is a constant 
then F = c / r²
first instance 
6 x 10⁻⁹ N = c/ (20 cm)² ---1)
F = c/(10 cm)² --- 2)
2) / 1)
\frac{F}{6* 10^{-9} } =  \frac{400}{100}
F = 6 x 10⁻⁹ x 4
F = 2.4 x 10⁻⁸ N
8 0
3 years ago
A 10.0-kg animal is running at a rate of 3.0 m/s. What is the kinetic energy of the animal?
Ilya [14]
Kinetic energy is calculated by using formula:

Ek = 1/2*m*v^2

Now we replace values of mass and speed in this formula.

Ek = 1/2*10*3^2 = 45.0J

When you have a formula and all variable values are given in the text of question just replace variable values in equation and find the final value.
4 0
3 years ago
When an object loses electrons, it acquires a(n) ____________________ electric charge?
madam [21]
It acquires a positive electric charge.
4 0
3 years ago
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