can someone answer these two questions? thanks

Answer:

Explanation:

A plane mirror will produce a virtual image of a real object. But it is correct that a plane mirror will also produce a real image of a virtual object.A virtual image An image in a mirror is a virtual object, which can in turn be used to create another image. This can occur when you have more than one optical element in the optical system. Then the object of one component becomes the image of the next optical component.

So the answer is Yes it will!!!!

Answer:

I think u know the answer of this question

Answer:

400 m

Explanation:

20m/s x 20s = 400m

Answer:

The answer is C.) Atoms of the same element that have different numbers of neutrons.

Explanation:

I know this is right because i took the test!

Answer:

the  current in the wire is  0.008333333  A

Explanation:

The computation of the current in the wire is as follows;

Current in the wire is

= Total charge ÷ cross sectional area of the wire

= 7.5 × 10^-3C ÷ 0.9s

= 0.008333333  A

Hence, the  current in the wire is  0.008333333  A

We simply applied the above formula so that the correct current of the wire could come

And, the same is considerd and relevant too

Answer:

If this helps, to work out the kinetic energy the formula is K (stands for kinetic energy) = 1/2 (half of) mass and velocity. So the answer is 450 joules.

Explanation:

Answer:

C. Test to see if your material is strong and works well.

Answer:

1:No

2:The teacher was in the hall  so how would the child ask?

3: The child could have went into the hallway and asked the teacher if they could try and fix it.

Explanation:

Sorry if that isn't what your asking!

      </3 PureBeauty

Answer:

During lunch your friend asked you to come over after school, so you get on their bus to go home.

Questions to answer:

1. Was consent given (yes, no, unsure)?

2. What evidence do you have to prove your way of thinking?

3. How can you change the scenario to show that consent was given?

Explanation:1:No2:The teacher was in the hall so how would the child ask?3: The child could have gone into the hallway and asked the teacher if they could try and fix it.

Answer:

it limits the amount of electrical energy that can pass through a circuit

Answer:

Magnitude = 50 units

Direction = 53.13°

Explanation:

The formula to find out the magnitude of a resultant vector with the help of its x and y components is given as follows:

[tex]Magnitude = \sqrt{x^{2} + y^{2}}\\\\[/tex]

where,

x = 30 units

y = 40 units

Therefore,

[tex]Magnitude = \sqrt{(30 unit)^{2} + (40\ unit)^{2}}\\\\[/tex]

Magnitude = 50 units

Now, the direction of the resultant vector will be given by the following formula:

[tex]Direction = tan^{-1}\frac{y}{x}\\\\Direction = tan^{-1}\frac{40}{30}[/tex]

Direction = 53.13°

d is the right answer

Answer:

When white light passes through the prism ,different colours suffers deviation through different angles and light appears to be dispersed. But in a hollow prism dispersion does not take place as all the colours travel with same speed in the air inside hollow prism. Thus no angular dispersion is there.

Answer: B, Microwaves reach a cell tower, then fiber optic cables send the signal to a cell tower near the person you are calling.

Explanation:

Answer:D. Sound waves reach a cell tower, then fiber optic cables send the

signal to a cell tower near the person you are calling.

Explanation: just got it right

Answer:

The car took 3 hours to travel 180 miles

Explanation:

Constant Speed Motion

An object travels at constant speed if the ratio of the distance traveled by the time taken is constant.

Expressed in a simple equation, we have:

[tex]\displaystyle v=\frac{d}{t}[/tex]

Where  

v = Speed of the object

d = Distance traveled

t = Time taken to travel d.

From the equation above, we can solve for t:

[tex]\displaystyle t=\frac{d}{v}[/tex]

The car travels at v=60 mi/h for a distance of d=180 miles. The time taken is:

[tex]\displaystyle t=\frac{180\ mi}{60\ mi/h}[/tex]

t = 3 hours

The car took 3 hours to travel 180 miles

Answer:

D) The temperature of the reactants is greater than the temperature of the products.

Explanation:

All the answers:

1. A) The reactants are unlit charcoal, and the products are charcoal that has already burned and released its energy

2. C) sugar + oxygen → carbon dioxide + water + energy

3. D)  iron + oxygen → rusted iron + energy

4. A) an endothermic reaction, because ice absorbs heat to become liquid water

5. D) The temperature of the reactants is greater than the temperature of the products.

We can argue that a reaction is endothermic when the temperature of the reactants is greater than the temperature of the products.

An endothermic reaction is a chemical reaction accompanied by the absorption of heat.

Comparing the reactants and the products of a chemical reaction, which observation can best be used to argue that the reaction is endothermic?

We can argue that a reaction is endothermic when the temperature of the reactants is greater than the temperature of the products.

Learn more about endothermic reactions here: https://brainly.com/question/1995950

Answer:

km

Explanation:

Answer:

Km

Explanation:

Speed is measured is distance traveled/time

Given that,

Mass of the stone, m = 400 g = 0.4 kg

Initial speed, u = 20 m/s

It is climbed to a height of 12 m.

To find,

The work done by the resistance force.

Solution,

Let v is the final speed. It can be calculated by using the conservation of energy.

[tex]v=\sqrt{2gh} \\\\v=\sqrt{2\times 9.8\times 12} \\\\v=15.33\ m/s[/tex]

Work done is equal to the change in kinetic energy. It can be given as follows :

[tex]W=\dfrac{1}{2}m(v^2-u^2)\\\\=\dfrac{1}{2}\times 0.4\times (15.33^2-20^2)\\\\=-32.99\ J[/tex]

So, the required work done is 32.99 J.

Answer:

Explanation:

To get the person Moving you have to overcome the static (means not moving) friction coefficient.  U(static)

To get the person going at the same speed you have to overcome the kinetic friction coefficient. U(Kinetic)

Force to get him moving is 198 N.   Force = ma = U(static)Mg

combining the 2 equations you get 198N = U(static)* 55kg *9.8m/s^2   Solve for U(static)

Same equation to keep him moving except with the dynamic force and the dynamic U

175N=  U(kinetic)*55kg*9.8m/s^2  Solve (U dynamic)

Newton's second law and the expression of the friction force allow to find the result for the value of the kinetic friction coefficient is:

          μ = 0.325  

Newton's second law establishes a relationship between the net force, mass, and acceleration of the body.

         Σ F = m a

Where the bold letters indicate vectors, m is the mass and the acceleration.

The friction force is a macroscopic force that represents the interactions between the two surfaces, it can be of two types:

The expression in both cases is:

         fr = μ N

Where N is the normal and μ is the friction coefficient, one value for the static case and another for the kinetic case.

In the attachment we have a free-body diagram for when the skater is moving with constant speed.

y=axis

            N - W = 0

            N = W

x-axis

           F - fr = 0

           F = fr

They indicate that the applied force is F = 175N and the mass of the skater is m = 55 kg.

We substitute.

            F = μ mg

            μ = [tex]\frac{F}{mg}[/tex]  

Let's calculate.

          μ =[tex]\frac{175}{55 \ 9.8}[/tex] 175/55 9.8

          μ = 0.32

In conclusion, using Newton's second law and the expression of the friction force we can find the result for the value of the coefficient of kinetic friction is:

          μ = 0.325

Learn more here:   brainly.com/question/1714663

Answer:

0.25 m

Explanation:

Refraction occurs when the velocity or wavelength of a wave changes at the interface between two media.

We know that refractive index=

Wavelength in medium A/wavelength in medium B = velocity in medium A/velocity in medium B

Let the wavelength of medium B be a

0.5/a = 0.3/0.15

0.5 × 0.15 = 0.3 × a

a= 0.5 × 0.15/0.3

a= 0.25 m

Answer:

Newton's first law of motion states that an object at rest will remain at rest and an object in motion will remain in motion unless it is acted on by an unbalanced force. Using unbalanced forces to control the motion of a skateboard demonstrates Newton's first law of motion.

Hope it helps

Answer:

Good question! It's the law of motion.

Explanation:

Answer:

in the ball

Explanation:

potential energy is where an object has energy, always, but it isn't always moving, and when you drop the ball, it has kinetic energy.

Answer:

The answer would be D

Explanation:

It's quite simple, the Universal Law of Gravitation states that all mass no matter the size, shape, or weight acts equally upon the force of gravity of the gravitational object. Basically, between all sizes, shapes, weights of masses, gravity applies the same gravitational force with all. Gravity with friction would be something else, which is also states in the Theory of Gravitation.

Answer:

probably when the next pandemic happens

Answer:

carbon-14 must be the answer

Answer:

This is Newton's first law.

Explanation:

An object in motion will stay in motion and an object at rest wI'll stay at rest unless acted upon by an unbalanced force.