Two concave mirrors are kept in a straight line as shown in fig. Mirror A forms 2 times enlarged real image of an object kept in front of it on the same straight line. The focal length of mirror A is given as 10cm.
i. Using sign conventions calculate the object position and image position in the case of mirror A
ii. Mirror B forms a 1/4times diminished real image of the same object. Find the object position, image position and the focal length in this
case.
iii. Draw the ray diagrams in both the cases.
3

Answer:

No, only metal with magnetic properties.

Explanation:

Brass, Gold, Silver, are just some examples of metal magnets cannot stick on.

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Answer:

the bell has potential energy equal to,

18 x 9.8 x 45 = 7938 joules

Answer:These two forces are called action and reaction forces and are the subject of Newton's third law of motion. Formally stated, Newton's third law is: For every action, there is an equal and opposite reaction. The statement means that in every interaction, there is a pair of forces acting on the two interacting objects.

Explanation:

Final answer:

The two forces involved in an interaction are contact forces and field forces; contact forces require physical contact, like the Coulomb force resulting in friction, while field forces, such as gravitational and electromagnetic forces, act at a distance.

Explanation:

The two forces involved in an interaction are commonly referred to as contact forces and field forces. Contact forces occur due to direct physical contact between two objects. An example of this is the Coulomb force, which occurs between the charges in atoms and molecules in close proximity, such as when a baseball hits a bat. On a larger scale, these forces are experienced as the force of friction and the normal force.

In contrast, field forces act without the necessity of physical contact; they occur because of the presence of a field in the space around an object. Examples of field forces include the gravitational force, which is due to mass, and the electromagnetic force, which occurs between charged particles and can manifest as either electrostatic or magnetic forces. Both of these types of forces, contact and field forces, are essential for understanding the interactions between objects in physics.

Answer:

True

Explanation:

This is because least resistance would allow more current to pass through it. Since current, I is inversely proportional to resistance, R.

Answer:

W = 285.62 N

Explanation:

It is given that,

Mass of Jessica is 55 kg

Slope of the hill is 32 degrees

We need to find the component of her weight that is along her direction of motion.

The component along her direction of motion is shown in attached figure. It means

[tex]W_y=mg\sin\theta\\\\W_y=55\times 9.8\times \sin(32)\\\\W_y=285.62\ N[/tex]

So, the component of her weight that is along her direction of motion is 285.62 N.

Answer:

286 rounded, - A P E X

Explanation:

Answer: D) a stone lies on the ground

Explanation:

Potential energy this is defined as the mechanical energy, energy stored, or energy created by the position of an object. Example; energy possessed by a ball while hanging at the top of a steep hill when about to roll down is called a potential energy. This is same as a stone which lies in a floor.

Answer:

a. 0.882 N b. 9.8 m/s² c. 6.42 m/s

Explanation:

a. The net force acting on the ball is its weight W = mg were m = mass of ball = 90 g = 0.090 kg and g = acceleration due to gravity = 9.8 m/s²

W = mg = 0.090 kg × 9.8 m/s² = 0.882 N

b. The acceleration = g = acceleration due to gravity = 9.8 m/s² since it is falling freely

c. Using v² = u² + 2as where v = final velocity of ball, u = initial velocity of ball = 0 m/s, a = acceleration of ball = 9.8 m/s² and s = height = 2.1 m. Substituting the values of the variables, we ave

v² = u² + 2as = 0² + 2(9.8 m/s²) × 2.1 m = 41.16

v = √41.16 = 6.42 m/s

Answer:

Astronomy is the branch of science that deals with celestial objects and space, including the physical universe.

Explanation:

Hope this helps :)

Answer:The definition of astronomy is the scientific study of matter outside of the atmosphere of the Earth including stars, planets and what they are made of and how they move.

Explanation:

Answer:

5.11 kg

Explanation:

Hooke's law states that stress is directly proportional to strain. It can be represented by the equation:

F = -kx

Where x is the displacement of the spring’s end from its equilibrium position, F is the force applied to the spring, k is a constant known as spring constant.

At first a force (F) of 62 N i used to stretch a spring by 12 cm (x).

Substituting into Hooke's equation:

F = kx

k = F/x = 62 / 12 = 5.17 N/cm

The spring is then held vertically and an object. The object is acted by upon by acceleration due to gravity since it is vertically upward. Therefore the force created by the object F = mg where g = acceleration due to gravity = 9.8 m/s². It causes a stretch (x) of 9.7 cm

Therefore:

mg =  5.17 N/cm × 9.7 cm

9.81m = 50.117

m = 50.117 / 9.81 = 5.11 kg

Answer:use the triangle formula

Explanation:

Final answer:

The force that knocks an object moving forward sideways is an external force, as described by Newton's first law of motion. This could be due to a collision, friction, or other forces changing the object's direction, like the effect felt during a sharp turn in a car.

Explanation:

The force you are asking about, when an object moving forward gets knocked sideways, is typically called an external force. In accordance with Newton's first law of motion, which states that an object will maintain its state of motion unless acted upon by a net external force, this sideways force changes the object's state of motion. In real-world situations, several forces can act as this external force, such as friction, tension, normal force, or even another object colliding with the one in motion.

For example, if an object like a rolling ball is knocked sideways by another ball, the sideways force is the result of the collision between the two balls. This changes the direction of the ball's momentum, creating a new motion path. Similarly, when a car makes a sharp turn, the force exerted by the friction between the tires and the road surface is what changes the direction of the car's velocity. This is why you might feel a force pushing you sideways in the seat, often referred to as a centrifugal effect, which is in fact the inertia of your body wanting to continue in a straight line.

Answer:

The image distance is 17.56 cm

Explanation:

We have,

Height of light bulb is 3 cm.

The light bulb is placed at a distance of 50 cm. It means object distance is, u =-50 cm

Focal length of the lens, f = +13 cm

Let v is distance between image and the lens. Using lens formula :

[tex]\dfrac{1}{f}=\dfrac{1}{v}-\dfrac{1}{u}\\\\\dfrac{1}{v}=\dfrac{1}{f}+\dfrac{1}{u}\\\\\dfrac{1}{v}=\dfrac{1}{13}+\dfrac{1}{(-50)}\\\\v=17.56\ cm[/tex]

So, the image distance is 17.56 cm.

Final answer:

Explanation on how to calculate the image distance for a light bulb placed 50 cm away from a thin convex lens with a 13 cm focal length.

Explanation:

The image distance for the light bulb placed 50 cm away from a thin convex lens with a focal length of 13 cm can be calculated using the lens formula:

1/f = 1/do + 1/di

Where:

f = focal length of the lens (13 cm)

do = object distance from the lens (50 cm)

Solving for di, the image distance would be around 15.62 cm.

Answer:

Explanation:

Given that,

Kinetic energy of an automobile is 2300J

K.E = 2300J

The formula for kinetic energy is

K.E = ½mv²

So, if the speed of the automobile is increased by 6, what is the kinetic energy

Now v' = 6v.

The mass of the automobile is constant.

Therefore, the kinetic energy is

K.E' = ½mv'²

Where v' = 6v

K.E' = ½m(6v)²

K.E' = ½m × 36v²

K.E' = 36 × ½mv²

Where, from above ½mv² = 2300J

Then,

K.E' = 36 × 2300 = 82,800J

The kinetic energy of the automobile when it increase it's speed is 82,800J

When the automobile moves with six times the initial speed, its kinetic energy will be 82800 J.

The kinetic energy (KE) of an automobile is given by the formula:

[tex]\[ KE = \frac{1}{2}mv^2 \][/tex]

where[tex]\( m \)[/tex]is the mass of the automobile and [tex]\( v \)[/tex] is its velocity.

If the automobile's kinetic energy is 2300 J at a certain speed, then we can denote this initial kinetic energy as [tex]\( KE_{initial} \)[/tex]and the initial speed as[tex]\( v_{initial} \)[/tex]. We have:

[tex]\[ KE_{initial} = \frac{1}{2}mv_{initial}^2 = 2300 \, \text{J} \][/tex]

When the automobile moves with six times the initial speed, its new speed is [tex]\( v_{new} = 6v_{initial} \).[/tex] The new kinetic energy[tex]\( KE_{new} \)[/tex]can be calculated using the same formula:

[tex]\[ KE_{new} = \frac{1}{2}m(6v_{initial})^2 \] \[ KE_{new} = \frac{1}{2}m \cdot 36v_{initial}^2 \] \[ KE_{new} = 36 \cdot \frac{1}{2}mv_{initial}^2 \] \[ KE_{new} = 36 \cdot KE_{initial} \][/tex]

Since [tex]\( KE_{initial} = 2300 \, \text{J} \)[/tex], we substitute this value into the equation:

[tex]\[ KE_{new} = 36 \cdot 2300 \, \text{J} \] \[ KE_{new} = 82800 \, \text{J} \][/tex]

The answer is: 82800.

Answer:

Explanation:

i really dont know im a 4th grader

Answer:

3.76

Explanation:

KE = 1/2 * m *v^2

v=[tex]\sqrt{2.4*2/340 *1000}[/tex]

The change in electrical potential energy of the system can be calculated using the equation: ΔPE = q * ΔV, where ΔPE is the change in potential energy, q is the charge, and ΔV is the change in electric potential. In this case, the change in electrical potential energy of the system is 0.060 J.

The change in electrical potential energy of the system can be calculated using the equation:

ΔPE = q * ΔV

Where ΔPE is the change in potential energy, q is the charge, and ΔV is the change in electric potential.

In this case, the charge q is 12 μC and the change in electric potential is given by ΔV = E * d, where E is the electric field strength and d is the displacement.

Plugging in the values, we get:

ΔPE = (12 μC) * (250 N/C) * (20.0 cm) * (1 m/100 cm)

Simplifying the units and the calculation, the change in electrical potential energy of the system is 0.060 J.

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To find the change in electrical potential energy, calculate the work done by the electric field as the charge moves along the x-axis. The work done equals 6 × 10⁻⁴ J, which is the change in electrical potential energy.

Change in Electrical Potential Energy

To determine the change in electrical potential energy of the system, we need to consider the direction and magnitude of the electric field and the charge's movement.

The electric field extbf(E) is directed along the positive x-axis with a magnitude of 250 N/C. The charge q is 12 μC (microcoulombs), or 12 × 10-6 C.

The initial position of the charge is at the origin (0,0), and the final position is (20.0 cm, 50.0 cm). Convert these to meters: (0.2 m, 0.5 m). The electric field works only along the x-axis, so we only need the change in the x-coordinate.

Work done by the electric field is defined as:

W = qEΔx

Here, Δx = xfinal - xinitial = 0.2 m - 0 m = 0.2 m.

Now, substitute the values:

W = (12 × 10⁻⁶ C) * (250 N/C) * (0.2 m)

W = 12 × 10⁻⁶ * 250 * 0.2

W = 12 × 10⁻⁶ * 50

W = 600 × 10⁻⁶ J

W = 6 × 10⁻⁴ J

This work is equal to the change in electrical potential energy (old{ΔU}) of the system.

The change in electrical potential energy of the system is 6 × 10⁻⁴ Joules.

Answer:1.8

Explanation:

Critical angle=c=34.6

Refractive index =n

n=1/sinc

n=1/sin34.6

n=1/0.5678

n=1.8

Refractive index is 1.8

The refractive index of the ruby is 1.8

The refractive index of an optical medium is defined as a dimensionless number indicating the light bending ability of that medium which determines how much the path of light is bent or refracted when entering the material.

Refractive index can be expressed as:

[tex]n=\frac{c}{v}[/tex]

n= Refractive index

[tex]{c}[/tex]= Speed of light

[tex]{v}[/tex]=Phase velocity of light

It can also expressed as:

n=1/sinc

For above given information, critical angle=c=34.6

Refractive index =n= 1/sin34.6

n=1/0.5678

n=1.8

Thus, the refractive index of the ruby is 1.8

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Answer:

0.0815

Explanation:

Mechanical advantage is output force/input force. So all you have to do is 55.0N/675N ~ 0.0815

Hope this helped!

Final answer:

The mechanical advantage of the bottle opener is the ratio of the output force to the input force, resulting in a mechanical advantage of approximately 12.27.

Explanation:

The mechanical advantage (MA) of a simple machine is the ratio of the output force to the input force. In this scenario with the soda bottle opener, you are given an output force of 675 N and an input force of 55.0 N. To calculate the mechanical advantage, you divide the output force by the input force:

MA = Output Force ÷ Input Force

MA = 675 N ÷ 55.0 N = 12.27

The bottle opener has a mechanical advantage of approximately 12.27, meaning the force exerted on the cap is about 12.27 times greater than the force applied by the user.

Answer:

More than 150 meters

Explanation:

Answer:

more than 150 meters

Explanation:

Answer:

lymph nodes

tonsils and adenoids

thymus

Explanation:

-Arteries are the blood vessels that take the blood that contains oxygen from the heart to the tissues and are part of the circulatory system.

-Lymph nodes are glands that take care of filtering the fluid that goes through the lympathic system and are also important for the functioning of the immune system.

-Capillaries are blood vessels that connect the veins and arteries and are part of the circulatory system.

-Tonsils and adenoids are located in the throat and they help protect the body from diseases and they are part of immune system and the lympathic system.

-Veins are the vessels that take the blood to the heart and they are part of the circulatory system.

-Thymus is an organ in which the T cells develop and they help protect the body against virus and bacteria and it is part of the immune and lympathic systems.

According to this, cells or organs that are considered to be part of both the immune and lymphatic systems are:

lymph nodes

tonsils and adenoids

thymus

Answer:

B), D), & E)

Explanation:

Edge 2021

Answer:

Explanation:

change in momentum = m ( v - u )   ;   m is mass , V is final velocity and u is initial velocity .

= 250 ( 28 - 6 )

= 5500. N.s

for calculating magnitude of force we shall apply the concept of impulse

Impulse = F X t = m( v-u )    ;   F is force applied for time t .

F x 60 = 5500

F = 91.67 N .

force exerted = 91.67 N .

Change in momentum is 5500 N/S

The magnitude of the force exerted on the Scooter is 91.67 N

The calculation can be done as follows

The formula for change in momentum is;

m(v-u)

250(28-6)

250(22)

5500 N/S

The formula for magnitude of the force is

F ˣ 60= 5500

F= 5500/60

F= 91.67 N

Hence the magnitude of force is 91.67 N and the change in momentum is 5500 N/S

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Answer: Cumulus

Explanation: Most large cloud fronts are made up of cumulus clouds, large storm clouds are cumulonimbus clouds.

Answer:

(C)- About 5 billion years ago

Explanation:

4.6 Billion Years rounds up to 5 Billion Years

Answer:

[tex]F_{o}=12800 N[/tex]  

Explanation:

Let's use the Pascal principle:

[tex]P_{i}=P_{o}[/tex]

[tex]\frac{F_{i}}{A_{i}}=\frac{F_{o}}{A_{o}}[/tex]

Where:

F(i) is the input force, 200 N

F(o) is force exerted on the piston  

A(i) is the area of the plunger (A =πr(i)²)

A(o) is the area of the piston (A =πr(o)²)

[tex]F_{o}=\frac{A_{o}F_{i}}{A_{i}}[/tex]

[tex]F_{o}=\frac{r_{o}^{2}F_{i}}{r_{i}^{2}}[/tex]

[tex]F_{o}=\frac{0.8^{2}*200}{0.1^{2}}[/tex]                

[tex]F_{o}=12800 N[/tex]              

I hope it helps you!                    

Answer:

I do not have  enough information to tell

Explanation:

This is deduced due to the fact that if the net force due to B and C on A is zero, the charges on B and C could either be positive or negative depending on the charge on A.

Answer:

The speed of sound, in m/s, through air at this temperature is 343.5 m/s

Explanation:

Given;

distance traveled by sound, d = 1,687.5 meters

time taken for the sound to travel, t = 5 seconds

air temperature, θ = 10°C

Speed of sound = distance traveled by sound / time taken for the sound to travel

Speed of sound = d / t

                           = 1687.5 m / 5 s

                           = 337.5 m/s

Speed of sound at the given temperature is calculated as;

c = 337.5 + 0.6θ

c = 337.5 + 0.6 x 10

c = 337.5 + 6

c = 343.5 m/s

Therefore, the speed of sound, in m/s, through air at this temperature is 343.5 m/s

Answer:

Explanation:

According to columbs law;

F = [tex]kq1q2/r^{2}[/tex]

F is the attractive or repulsive force between the charges = 12N

q1 and q2 are the charges

let q1 = - 8.0 x 10^-6 C

q2=?

r is the distance between the charges = 0.050m

k is the coulumbs constant =9*10⁹ kg⋅m³⋅s⁻⁴⋅A⁻²

On substituting the given values

12 = 9*10⁹*( - 8.0 x 10^-6)q2/0.050²

Cross multiplying

[tex]0.03=9*10^{9}* -8.0*10^{-6} q2\\0.03 = -72*10^{3} q2\\q2 = \frac{0.03}{ -72*10^{3}} \\q2 = -4.17*10^{-7}C[/tex]

Answer:

q₂ = + 4.17 x 10⁺⁷ C

Explanation:

From Coulomb's Law, we know that force of attraction or repulsion between two charges is given by:

F = kq₁q₂/r²

where,

F = force = 12 N

k = Coulomb's Constant = 9 x 10⁹ Nm²/C²

q₁ = magnitude of 1st charge = 8 x 10⁻⁶ C

r = distance between charges = 0.05 m

q₂ = magnitude of second charge = ?

Therefore,

12 N = (9 x 10⁹ Nm²/C²)(8 x 10⁻⁶ C)(q₂)/(0.05 m)²

0.03 Nm² = (72000 Nm²/C²)(q₂)

q₂ = (0.03 Nm²)/(72000 Nm²/C²)

q₂ = + 4.17 x 10⁺⁷ C

It is a positive charge, because there is attraction between opposite charges only.

Answer:

Its A

Explanation:

I took the test

The claim of the student that supported should be an object along with the positive charge along with will the movement towards the negative plate.

In terms of physics, the charged particle refer to the particle along with an electric charge. It should be ion like molecule or atom along with a surplus or deficit of electrons with respect to the b. In the case when the object should be considered as the positive charge should be movement towards the negative plate so the same should be considered as the student claim.

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