An object is placed 12 cm from a convex mirror with a focal length of 5.0 cm. please help.

Answer:

require a medium to propagate

Explanation:

this is because electromagnetic waves can travel through vacuum at the speed of 3.0 x 10^8 m/s

because they don't need particles to transfer energy

hope this helps

Answer:

24° north of east

Explanation:

tan(x)=90/200 ie x=arctan(90/200)=24°

So the plane took off 24° east.

Answer:

24° north of east

Explanation:

Hope this will help

Answer:

An endothermic reaction is one in which heat is transferred from the surroundings to the reactants.------- true

Answer:

T . Energy is transferred to the reactants

Explanation:

Answer:

0.05m

Explanation:

Given parameters:

Force constant of the spring  = 40000N/m

Potential energy  = 42J

Unknown:

Extension  = ?

Solution:

To solve this problem, use the expression below:

           E.PE  = [tex]\frac{1}{2}[/tex] k e²  

k is spring constant

e is the extension

              42  =  [tex]\frac{1}{2}[/tex]  x 40000 x e²  

               e  = 0.05m

Answer:

Input Force

Explanation:

Answer:

resistance distance.

Explanation:

Answer:

a then c then b

Explanation:

Answer:

please find attached pdf

Explanation:

Answer:

Explanation:

The current produced by a 9-volt battery flowing through a resistance of 0.2 ohms would be  45 Ampere.

Resistance is the obstruction of electrons in an electrically conducting material.

The mathematical relation for resistance can be understood with the help of the empirical relation provided by Ohm's law.

V=IR

As given in the problem we have to find the current produced by a 9-volt battery flowing through a resistance of 0.2 ohms.

current produced by a 9-volt battery  = voltage /resistance

                                                              = 9 volt /0.2 ohms

                                                              = 45 Ampere

Thus, the current produced would be 45 Ampere.

Learn more about resistance from here, refer to the link;

brainly.com/question/14547003

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Answer:

a) [tex]m = \frac{2\cdot E_{k}}{v^{2}}[/tex], b) [tex]v^{2} = \frac{2\cdot E_{k}}{m}[/tex], c) [tex]v = \sqrt{\frac{2\cdot E_{k}}{m } }[/tex]

Explanation:

a) Translational kinetic energy ([tex]E_{k}[/tex]), measured in joules, is represented by the following expression:

[tex]E_{k} = \frac{1}{2}\cdot m \cdot v^{2}[/tex] (1)

Where:

[tex]m[/tex] - Mass, measured in kilograms.

[tex]v[/tex] - Velocity, measured in meters per second.

Now we clear the mass within the formula:

[tex]E_{k} = \frac{1}{2}\cdot m\cdot v^{2}[/tex]

[tex]2\cdot E_{k} = m\cdot v^{2}[/tex]

[tex]m = \frac{2\cdot E_{k}}{v^{2}}[/tex]

b) Now we clear the velocity squared:

[tex]v^{2} = \frac{2\cdot E_{k}}{m}[/tex]

c) Now we clear the velocity:

[tex]v = \sqrt{\frac{2\cdot E_{k}}{m } }[/tex]

Answer:

C. mass and distance.

Explanation:

The strength of a gravitational force between two objects depends on mass and distance.

Answer: A

Explanation:

Parallel circuit. The source current is three times the current of a single bulb

Answer:

During a supernova, the star releases very large amounts of energy as well as neutrons, which allows elements heavier than iron, such as uranium and gold, to be produced. In the supernova explosion, all of these elements are expelled out into space.

hope this helps.

Explanation:

Answer:

Wind Turbines are used in a variety of applications from harnessing offshore wind resources to generating electricity for a single home.

Explanation:

Answer:

The amount of gravitational potential energy an object has depends on its height and mass. The heavier the object and the higher it is above the ground, the more gravitational potential energy it holds.

Hope this helps :)

Answer:

Increase height

Increase mass

The full question is found in the image attached

Answer:

Densities

Explanation:

When we talk about density, one of the things that come to our mind is actually how heavy something is.

If i have substances that possess different densities, i will notice that i can not really mix them because they will separate and the heavier substance will be at the bottom while the lighter substance will be at the top.

Hence the two substances separated due to difference in density.

Answer:

a) Equation for spring constant k is [tex]k = \frac{2E}{e^2}[/tex]

b)Equation for the extension squared is [tex]e^2 = \frac{2E}{k}[/tex]

(c) Equation for the extension e is [tex]e = \sqrt{\frac{2E}{k} }[/tex]

Explanation:

Given;

[tex]E = \frac{1}{2} ke^2[/tex]

where;

E is the elastic potential energy

k is the spring constant

e is the extension of the spring

a) Equation for spring constant k is given as.

[tex]E = \frac{1}{2} ke^2\\\\ke^2 = 2E\\\\k = \frac{2E}{e^2}[/tex]

(b) Equation for the extension squared e2;

[tex]E = \frac{1}{2} ke^2\\\\ke^2 = 2E\\\\e^2 = \frac{2E}{k}[/tex]

(c) Equation for the extension e;

[tex]e^2 = \frac{2E}{k} \\\\e = \sqrt{\frac{2E}{k}}[/tex]

Answer:

I believe it is the same as before-Electrical energy is transformed into heat and light energy.

Explanation:

Hope this helps'-'

Chemical energy (in his muscles) ===> kinetic energy ===> electrical energy ===> light energy and a little bit of heat energy

Answer:

Explanation:

The Sun won't explode. ... Eventually (in five or seven billion years time), the Sun's life will come to an end. Our star will swell up, becoming something called a “Red Giant” star. It might even get so big that it swallows the Earth whole.

Answer:

yes

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Answer:

C + 2H2 -----> CH4