a bullet with mass 60.0 g is fired with an initial velocity of 575 m/s from a gun with mass 4.50 kg. the speed of the recoil of the gun is (2 points)

Answer:

So, 20W of light energy is produced per second.

Explanation:

a) To calculate the current flowing through the bulb, we use the formula:

I = P / V

Where P is the power in watts (100 W) and V is the voltage (220 V).

I = 100 / 220 = 0.45 A

b) To find the light energy produced per second, we use the formula:

E = P x t

Where P is the power in watts (100 W) and t is the time in seconds.

As we know only the power and not the time, we have to calculate the energy efficiency of the bulb.

Efficiency = (Energy output/ Energy input) * 100

Efficiency = (Light energy output / Total energy input) * 100

Let's assume that the bulb is on for 1 sec

Efficiency = (Light energy output / 100W) * 100

Light energy output = (Efficiency / 100) * 100W = 20W

Efficiency = 20%

So, 20W of light energy is produced per second.

Answer:

So, 20W of light energy is produced per second.

Explanation:

a) To calculate the current flowing through the bulb, we use the formula:

I = P / V

Where P is the power in watts (100 W) and V is the voltage (220 V).

I = 100 / 220 = 0.45 A

b) To find the light energy produced per second, we use the formula:

E = P x t

Where P is the power in watts (100 W) and t is the time in seconds.

As we know only the power and not the time, we have to calculate the energy efficiency of the bulb.

Efficiency = (Energy output/ Energy input) * 100

Efficiency = (Light energy output / Total energy input) * 100

Let's assume that the bulb is on for 1 sec

Efficiency = (Light energy output / 100W) * 100

Light energy output = (Efficiency / 100) * 100W = 20W

Efficiency = 20%

So, 20W of light energy is produced per second.

The conversion of energy can occur by the first law of thermodynamics.

We have to note that the kinetic energy would have to do with the energy of an object that is in motion. In this case, we can see that we have been told that super hero can be able to turn potential energy into kinetic energy.

This is in obedience to the first law of thermodynamics which states that energy can neither be created nor destroyed rather it can be converted from one form to another.

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the magnitude (in m/s2) and direction of the plane's average acceleration during this time interval is a = -9 m/s2 in westward direction.

The rate at which velocity changes is called acceleration. Acceleration typically indicates a change in speed, but not necessarily. An item that follows a circular course while maintaining a constant speed is still moving forward because the direction of its motion is shifting.

Include the appropriate variables and the specified values in your writing.

v = 0 m/s and u = 135 m/s

t = 15 s

To calculate the necessary acceleration for the given scenario, write the first law of motion.

At zero speed, v = u + at = 135 m/s + a(15 s) a = -9 m/s2.

The plane is deaccelerating in the opposite direction of motion in this case, as indicated by the negative magnitude of acceleration. As a result, the magnitude in m/ s2 is 9 m/ s2, and the average acceleration of the plane during this time period is westward.

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The angle from vertical of the axis of the second polarizing filter  unpolarized light with an intensity of 350 W/m² passes first through the polarizing filter with the vertical axis, then through the second polarizing filter and merging from the second filter with an intensity of 126 W/m² = 53°

The notions presented by Malus regarding the intensity of light must be used to answer this question.

According to the law of Malus, intensity is described as:

I' = [tex]\frac{1}{2}[/tex] I₀ cos²∅

The expression for the light's intensity is provided by after the first filter.

I = [tex]\frac{1}{2}[/tex] I₀

= [tex]\frac{1}{2}[/tex] (350 W/m²)

= 175 W/m²

Hence,

I' = [tex]\frac{1}{2}[/tex] I₀ cos²∅

cos²∅ = (2I' / I₀)

∅ = cos⁻¹ ([tex]\sqrt{\frac{(2)(126)}{350} }[/tex])

= 53°

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The final image will be real and obtained at infinity is the position and magnification of the final image.

A converging lens brings together parallel light rays that are moving in their direction. A diverging lens does just that as parallel light rays approach it. It creates the true image. The virtual image is created. A converging lens is also known as a convex lens.

Since the rays converge after passing through the convex lens, convex lenses are also known as converging lenses. Since the rays diverge after striking the concave lens, it is known as a diverging lens.

For converging lens,

[tex]\frac{1}{f} =\frac{1}{v} -\frac{1}{u}[/tex]

[tex]\frac{1}{30} =\frac{1}{v} -\frac{1}{-19}[/tex]

[tex]\frac{1}{v} =\frac{1}{30} -\frac{1}{19}[/tex]

[tex]v=11m[/tex]

The final image will be real and obtained at infinity.

For diverging lens,

[tex]\frac{1}{f} =\frac{1}{v} -\frac{1}{u}[/tex]

[tex]\frac{1}{9} =\frac{1}{v} -\frac{1}{-30-25}[/tex]

[tex]\frac{1}{v} =\frac{1}{9} -\frac{1}{55}[/tex]

[tex]v=46m[/tex]

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An object is placed at a distance of 40 cm in front of a concave mirror of focal length 20 cm, 11:21 is the ratio of the size of the image and the size of object.

What is focal length?

A narrow lens's focal length in air is calculated by dividing the distance between its primary foci, also called its focal points, from the lens's center. How far a collimated light beam must travel to focus on a single point is determined by the focal length of a converging lens, such as a convex lens, which is positive.

What is concave mirror?

Convex mirrors have curved surfaces that extend outward in the direction of the light source. This projecting surface does not direct light; it merely reflects it.

Therefore, An object is placed at a distance of 40 cm in front of a concave mirror of focal length 20 cm, 11:21 is the ratio of the size of the image and the size of object.

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A helium atom (mass = 4m) moving with speed v collides elastically with a deuterium (hydrogen 2) atom (mass = 2m) at rest.  The percentage change in the kinetic energy of the helium atom after the collision is 50%.

Generally, This is because in an elastic collision, kinetic energy is conserved, and the total kinetic energy of the system is the same before and after the collision.

The helium atom has twice the mass of the deuterium atom, so it has half the velocity after the collision.

Since kinetic energy is given by 1/2mv^2, the velocity is squared, so a decrease in velocity by a factor of two results in a decrease in kinetic energy by a factor of four, which is equivalent to a decrease of 50%.

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The forces acting on the book are: hand on book and earth on book. The forces acting on your hand are: book on hand and earth on hand. the forces "hand on book" and "book on hand" are action-reaction pair.

You hold your physics textbook in your hand. By applying the Newton's third law of action and reaction, we can conclude that:

a) The forces acting on the book are:

   The floor is not in contact with the book, hence, there is no force from the floor on the book

b) The direction of forces in part (a):

c) The forces acting on your hand:

d) The direction of forces in part (c)

e) The action force has the same magnitude as the reaction force, but in opposite direction.

The action-reaction forces are:

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The magnitude of the charge can be calculated using the equation E = kQ/r^2, where E is the electric field strength, k is the Coulomb's constant (8.99 x 10^9 N·m^2/C^2), Q is the charge, and r is the distance from the charge.

what is strength ?

Strength can be defined as the capacity to endure physical, mental, or emotional stress. It can refer to physical strength, mental strength, or emotional strength. Physical strength is the ability to perform physical activities such as lifting weights, running, or pushing objects. Mental strength is the ability to focus on tasks and stay motivated.

Emotional strength is the capacity to handle difficult situations and to remain calm and composed. Strength is a quality that can be cultivated through practice and hard work. It is an important factor in achieving goals, as well as maintaining a healthy lifestyle. Strength can also be developed by setting and achieving goals, practicing visualization techniques, and engaging in activities that challenge one's mental and physical abilities. Additionally, strength can be developed through positive thinking, self-awareness, and self-discipline.

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If the momentum increases, the De Broglie wavelength of an electron will increase. The correct answer is A.

The de Broglie wavelength of a particle is inversely proportional to its momentum. As the momentum of an electron increases, the de Broglie wavelength of the electron decreases.

The de Broglie wavelength of a particle is related to its momentum and its mass, with the equation λ = h/p, where h is Planck's constant and p is the momentum of the particle. Increasing the momentum of an electron will decrease its de Broglie wavelength, as the momentum and the wavelength are inversely proportional.

This is because the de Broglie wavelength of a particle is related to the uncertainty of its position, and as the momentum increases, the uncertainty of the position decreases, thereby decreasing the de Broglie wavelength.

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The dive angle must the submarine make is found to be 25.4 °

a vessel capable of submersion: a nuclear submarine. a command or base for submarines. A wide range of missions, including anti-surface and anti-submarine warfare, information gathering, mine reconnaissance, ground strikes, polar operations, Special Forces support, and guarding other fleet ships, can be carried out by American submarines.

Sin Ф = 0.9/2.1;

Ф=> Sin^-1(0.9/2.1);

   => 25.4°.

For long to four months at a time, submarines can remain submerged more than 600 feet below the surface of the water while continuously patrolling and carrying out secret operations. Although you can't always see them, they are always working under the sea in silence.

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Answer:

8.75 ×10^6m²

Explanation:

(35×10^1 × 25 × 10^3)m²

(35×25×10^4)m²

(875×10^4)m²

The spring extends 0.18 meters in total. And choice (4) is accurate.

The spring stiffness is quantified by the spring constant, or k. For various springs and materials, it varies. The stiffer the spring is and the harder it is to stretch, the larger the spring constant.

The force necessary to compress or extend a spring is inversely related to the length extended, according to Hooke's law. Newton's Third Law of Motion states that a spring will return with a restoring force after being pulled. Hooke's Law, which connects spring force to continuous spring force, is followed by this restoring force.

Given information: The spring constant's value is k = 68 N/m.

F = 12 N is the amount of downward force.

The stiffness of spring material is expressed numerically as the spring constant. such that it may be calculated simply dividing the spring force by the stretch distance. It is referred to as Hooke's law.

based on Hooke's law,

F = K × x

x = F /K

x = 12/68

x ≈ 0.18m

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Answer:

The weight of a person with a mass of 68.5 kg on the Moon is 109.6 N.

Explanation:

To find the weight of a person on the Moon, we need to use the formula:

Weight = Mass x Gravitational Force

On the Moon, the gravitational force is 1.6 N/kg. So, using that information:

Weight = 68.5 kg x 1.6 N/kg = 109.6 N

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The oxidation state of Ag or the charge on Ag is +1.

The oxidation state of an element is the charge the element would have if all its bonds were covalent. In the case of Ag, it forms an ionic bond with one oxygen atom, Ag+O- => AgO.

The oxygen atom has an oxidation state of -2 and the Ag is +1. To determine the oxidation state, one must understand the ionic charges of the elements in the compound.

The charge of the compound must be equal to zero, so since the oxygen has a charge of -2, the Ag must have a charge of +1. If the compound had more than one of the same element, the oxidation state would be the average of the oxidation states of the atoms.

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The number of beats that will be heard per second will be 6 beats heard per second.

When two sound waves of slightly different frequencies are combined, the resulting sound wave will have a periodic variation in amplitude, which is known as a beat.

Beats occur when two sound waves of slightly different frequencies are combined. The number of beats per second is equal to the difference in frequency between the two sounds. In this case, the two tuning forks have a frequency difference of 260 Hz - 254 Hz = 6 Hz. Therefore, there will be 6 beats heard per second.

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The time required for a wave with a 6 kHz frequency to oscillate 24,000 times was calculated to be 41 hours. An event's repetitions per unit of time are what determine its frequency.

It is distinct from angular frequency and is sometimes referred to as temporal frequency, just to be clear. Every second, or one hertz (Hz), or unit of frequency, an event occurs. The vibration of the strings of stringed instruments, such as the guitar, is another example of oscillation. The pendulum's oscillating movement is brought on by its back-and-forth motion. Vibrations in mechanical systems are referred to as such. A particle vibrates when it oscillates between two places with respect to its centre of mass.

T = 1/lamda is the formula for time.

Time = 1/24000*106 Time = 41 hours

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Answer: 4 seconds

I'm not sure about the working out because I just got the answer while doing an online test but i hope it helps :)

The values of charge for q₁ and q₂ are 5.715 × 10⁻⁸ C and -5.715 × 10⁻⁸ C, respectively.

Electric charge is the physical property of any matter which causes it to experience a force when it is placed in an electromagnetic field.

The acceleration is upwards. Therefore, the charge will be accelerated upwards and it is attracted by charge q₁ and repelled by q₂. Therefore, the q₁, is positive charge and q₂, is negative charge.

The net force for the following case will be,

Fq₁Q + Fq₂Q = 0

kq₁ Q/ r² = - kq₂ Q/ r²

q₁ = -q₂

The net force is,

Fnet = ma

F net = (5.50 × 10⁻³ kg) (304 m/s²)

Fnet = 1.672 N

The triangle is an isosceles triangle and the value of the angle is,

cos θ = -2.25 cm/ 3cm

θ = cos⁻¹(-2.25 cm/ 3cm)

θ = 41.4°

The force equation is,

F net = kq₁ Q/ r² cos θ + kq₂Q/ r²cos θ

ma = kq₁ Q/ r² cos θ + kq₂Q/ r²cos θ

1.672 N = 2 (9×10⁹) (1.95×10⁻⁶ c) / (3×10² m)² × cos (41.4°)

q₁ = (1.672 N) (3×10² m)²/ (9 × 10⁹) (1.95×10⁻⁶ c) cos (41.4°)

q₁ = 5.715×10⁻⁸ C

Since,

q₂ = -5.715 × 10⁻⁸ C

Therefore, the charge q₁ and q₂ are 5.715 × 10⁻⁸ C and -5.715 × 10⁻⁸ C, respectively.

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The answer states that 833 watts would've been saved if a family converted ten 100-watt lights over to led bulbs.

James Watt, the developer of the steam engine, was honored with the name Watts, which are units used to determine the power of electricity. The electrical power expressed in Watts is the same as one volt under one volt of pressure. A watt of power is a very small amount.

One voltage equals 1000 watts or.001 kilowatts (kW) per hour, which is what circuits need to power lights, devices, and appliances.

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How large is the impulse that the floor exerts on the egg is 22.15 N.

Impulse is related to force as it represents the change in momentum of an object as a result of a force acting over a period of time. Impulse is calculated by multiplying the force applied to an object by the time over which that force is applied. In this case, the force exerted by the floor on the egg causes a change in the egg's momentum, and the impulse is the product of this change in momentum and the time over which it occurred.

First step is to calculate the velocity of the egg just before hitting the floor,

v²=u²+2gh, where u=0

v²=0²+2×9.81×1.0

v²=4.43/s

Second step is to calculate the change in momentum of the egg,

Change in momentum=0.05×4.43/s

Change in momentum=0.2215 kgm/s

Third step is to calculate the force exerted on the egg by the floor using this formula,

Force exerted on the egg=Change in momentum/Time

Force exerted on the egg=0.2215/0.010

Force exerted on the egg=22.15 N

In conclusion how large is the impulse that the floor exerts on the egg is 22.15 N.

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Sound waves are mechanical waves that require a medium to travel through.

Electromagnetic waves are a form of energy that have both electric and magnetic field components. They are part of the electromagnetic spectrum and are created by the oscillation of electric and magnetic fields. These waves travel at the speed of light and can be transmitted through empty space, solid objects, and even through the human body.

They are created by vibrating objects, and the sound waves travel through the medium, such as air or water, to reach the ear. Electromagnetic waves, on the other hand, are transverse waves that do not require a medium to travel through. These waves are created by oscillating electric and magnetic fields, and they can travel through a vacuum and other materials, such as gases, liquids, and solids. They are also responsible for carrying energy from one place to another.

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The amount a planet "wobbles" the galaxy it is orbiting may be used to calculate the planet's period.

The distance unit is referred to by the Standards Organization as a metre. It's noteworthy to note that utilising this fundamental unit and a few equations, a number of derived quantities or quantities, including capacity, area, force, and movement, may be created.

Distance is how length is calculated. For instance, a road's length is equal to its length. Decimals, centimetres, metres, and kilometer are the most used metric units for measuring distance.

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All electromagnetic waves are organized into a continuum called the electromagnetic spectrum according to their frequency and wavelength.

The wavelength, which will also apply to troughs, is the separation between two wave crests. The frequency is measured on cycles per second (Hz), which is the quantity of vibrations that cross a specific area in a second (Hertz). In this article, the relationship between frequency and wavelength is covered.

Here are some wavelength examples: Yellow Light is a prime example. The wavelength range of all visible light is 400 to 700 nanometers (nm). The wavelength of yellow light is 570 nanometers or such. Wavelength (nm) (nm)

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The minimum speed required for you to make it around the loop is 7 m/s.

The displacement that an object or particle experiences with respect to time is expressed vectorially as velocity. The meter per second (m/s) is the accepted unit of velocity magnitude (also known as speed). Alternately, the magnitude of velocity can be expressed in centimeters per second (cm/s).

The vector quantity velocity (v), denoted by the equation v = s/t, quantifies displacement (or change in position, s), over change in time (t).

F net  = Fc = Fg + Fn

⇒ m v²/r = mg    [Fn = 0]

⇒ v = √ 5 × 9.8     [d = 10m, radius = 5m]

⇒ v = 7 m/s

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A rectangular coil, its dimensions are 20 cms x 10 cms, it consists of 100 turns. It rotates around an axis parallel to its length in a magnetic flux of density 35 x 10 Tesla. A maximum e.m.f. of 4.4 volt was created. The speed with which it rrotates is 0.252 radians/sec

The formula for calculating the speed is given by:

Speed = (e.m.f. x N) / (B x A)

Where e.m.f. = 4.4 volts, N = 100 turns, B = 35 x 10 Tesla, and A = 20 cm x 10 cm = 200 cm2

Speed = (4.4 x 100) / (35 x 10 x 200) = 0.252 radians/sec

Therefore, the correct answer is as given above. It could be calculated that the speed with which it rotates is 0.252 radians/sec.

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The minimum distance from the center at which the penny can be placed without sliding off is 0.0039 m, while the maximum distance is not defined as the penny would slide off as soon as it's placed further away from the center.

To determine the maximum/minimum distance from the center at which the penny can be placed without sliding off, we need to calculate the static friction force (F_s) and the centrifugal force (F_c) acting on the penny.

[tex]F_s[/tex] = coefficient of static friction * normal force

[tex]F_c = m * r * w^2[/tex]

where

m = mass of penny

r = distance from center

w = angular velocity (converted to radians/sec)

In order for the penny to not slide off, the static friction force must be greater than or equal to the centrifugal force. Therefore,

[tex]F_s > = F_c[/tex]

Plugging in the known values:

[tex]0.4 * m * g > = m * r * (40 * 2 * \pi / 60)^2[/tex]

where g is the acceleration due to gravity (approx 9.8 m/s^2)

Solving for r:

[tex]r > = (0.4 * g) / (40 * 2 *\pi/ 60)^2[/tex]

r >= 0.0039 m

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The weight of the automobile is 19.94KN

Weight is the measure of the pull of gravity on an object. It is usually measured in units of mass, such as kilograms (kg) or pounds (lbs).

Depending on the object, the weight can be affected by the environment, including gravity, atmosphere, and other forces.

Weight of the automobile = (4 tires) x (gauge pressure) x (contact area) x (gravitational acceleration)

                                         = (4) x (2.3 105 Pa) x (0.027 m2) x (9.8 m/s2)

                                        = 1.994 x 104 N

                                        = 19.94 kN

Therefore, The weight of the automobile is 19.94KN

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When using an oil immersion lens, four procedures can be implemented to achieve maximum resolution: Using a high-quality oil immersion objective lens, Keeping the objective lens clean, Proper focus, Proper oil matching.

1.Using a high-quality oil immersion objective lens: The oil immersion objective lens is the most critical component in achieving high resolution. Using a high-quality, high numerical aperture lens will ensure that the resolution is maximized.

2.Proper oil matching: The type of oil used in the immersion lens needs to have the same refractive index as the cover glass of the microscope slide to achieve maximum resolution.

3.Keeping the objective lens clean: Any dust or debris on the lens can affect the resolution. Regular cleaning of the lens with appropriate solvents will help to maintain maximum resolution.

4.Proper focus: The microscope stage needs to be adjusted so that the objective lens is in the correct position, i.e., in focus, to achieve maximum resolution. This can be done by using the fine focus knob or a focus motor.

By implementing these procedures, the maximum resolution can be achieved with an oil immersion lens.

Additionally, using the oil immersion lens at the highest possible magnification while keeping the sample well illuminated will also help to achieve the best resolution.

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The buoyant force in the increasing order is:

F<A<D<B<C=E

The buoyant force is an upward directed force that acts on any object when it is submerged either partially or completely inside a static fluid.

A body is able to float on the surface of fluid because of the buoyant force acting on the object, which tends to balance the weight of the object. The strength of the buoyant force on an object depends on the mass/volume of the fluid displaced by the object. This principle is known as Archimedes' Principle. According to Archimedes' principle, the buoyant force acting on an object is equal to the weight of the fluid displaced by the object.

The weight of an object is given by the equation:

W=mg

Here,

• m is the mass of the object.

• g=9.8m/s² =9.8m/s² is the acceleration due to gravity.

In terms of the volume, V and density ρ, the above equation becomes:

W=ρVg

It can be seen from the above equation that for a constant, ρ, we have:

W∝V

Therefore, the buoyant force will be proportional to the volume, Vf , of the fluid displaced by the object. Since the volume, Vf of the displaced fluid is equal to the volume of the object submerged inside the fluid, we have:

Vf = Vo∴Fb∝Vo

Therefore, the buoyant force in the increasing order is:

F<A<D<B<C=E

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The complete question is as follows: