how fast would a(n) 80 kg man need to run in order to have the same kinetic energy as an 8.0 g bullet fired at 380 m/s ?

if a pizza radiates more energy than it absorbs, its temperature will decrease, hence option C is correct.

The temperature of a substance radiates energy without also absorbing it as it cools.

The amount of energy stored in a solid item reduces if it radiates more energy than it absorbs, which results in a fall in the object's temperature.

Therefore, the temperature of the pizza will decrease, if it radiates more energy than it absorbs, hence option C is correct.

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The order of water solubility for the organic compounds you listed is:

CH3COOCH3 (ethyl acetate) - this compound is moderately water soluble

CH2=CH2CH3 (ethylene) - this compound is slightly soluble in water

CH3CH2COOH (ethanoic acid) - this compound is highly soluble in water

The solubility of a compound in water depends on its molecular structure and the intermolecular forces that exist between the compound and the solvent (in this case water).

In general, compounds with polar groups such as carboxyl groups (COOH) can form hydrogen bonds with water molecules, making them more water soluble.

Non-polar compounds, on the other hand, cannot form hydrogen bonds with water molecules and are instead bound by weaker dispersion forces than hydrogen bonds, resulting in poor water solubility.

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By resolving the ratios of measurements you can dilate an image with scale factor.

The size of the enlargement/reduction is represented by the scale factor.

For example, a scale factor of 2 means that the new shape is twice the size of the original shape. A scale factor of 3 means that the new form is three times the size of the original form.

To calculate the scale factor, use the following formula:

Enlarge = Large/Small

Reduce = Small/Large

You can get "Large" and "Small" from the corresponding sides of the diagram.

Refer Fig :- Triangle DEF lies between the origin of triangle ABC and point O, the center of dilation, because the scaling factor is less than 1. Triangle ABC is between dilated triangle GHI and the center of dilation because the scaling factor is greater than 1. Moreover, all three triangles are similar.

The closer the scale factor is to 1, the closer the magnified triangle image is to the original image. Triangle ABC is expanded by a factor of to produce triangle DEF.

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The intensity of the sound in decibels will be equal to 80 that is option D is correct.

The equation of measuring the intensity is given as

I(dB)=10log[I/I₀] where I is the intensity and I₀ is the threshold of a hearing intensity.

According to the question, the intensity or loudness of a sound can be measured in decibels (dB) which is given by

I(dB)=10log[I/I₀]

Now, I = 10⁸I₀

I(dB) = 10 log [10⁸I₀/I₀]

I(dB) = 10 log (10⁸)

I(dB) = 80 log 10

I(dB) = 80 which is the required value.

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Complete Question:

The intensity, or loudness, of a sound can be measured in decibels (dB), according to the equation I(dB)=10log[I/I₀], where I &/ the intensity of a given sound and I0 is the threshold of a hearing intensity. What is the intensity, in decibels, [I(dB)], when I=10⁸(I₀)? Round to the nearest whole number. (Refer to photo for equations) A.8 B.9 C.19 D.80

Answer:

it's 13

Explanation:

10times6 plus 8 = 13

Answer:

Potential energy  800 J

Explanation:

Given:

M = 10 kg

h = 8 m

g = 10 m/s²

____________

W - ?

Potential energy:

W = M·g·h

W = 10·10·8 = 800 J

Answer: 52.33 g/cm^3

Explanation: density= mass/volume

                                 785g/15cm^3

                                   =52.33

An object has a mass of 785g and a volume of 15cm³ then its density will be 52.33 g/cm³.

Density is physical property of a matter. it is the ratio of mass to volume.

I.e. Density = Mass ÷ Volume. it tells how much mass a body is having for its unit volume. Density is a scalar quantity. its SI unit is Kg/m³. its dimension is [L⁺³M¹].

Given,

Mass M of the object = 785g

Volume V of the object = 15cm³

Density = ?

by using formula,

Density = M/V

Density = 785/15

Density = 52.33 g/cm³

Hence Density of the object is 52.33 g/cm³.

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The angular speed increases by a factor of 2 and when she decreases her moment of inertia by a factor of 2 her angular speed change.

Angular momentum is a characteristic of rotating bodies determined by the product of their angular velocity and moment of inertia.

The angular momentum is calculated by

L = IW

Where,

I = Inertia momentum

W = angular velocity

It can be calculated by applying the law of conservation of angular momentum as given below:

= [tex]I_{i} W_{i} =I_{f} W_{f}[/tex]

Where, i = initial, f = final

Since the final inertia momentum of figure skater gets decreased by 1/2 from the initial,

= [tex]\frac{1}{2}I_{i} = I_{f}[/tex]

Therefore, the final angular speed would become

 [tex]I_{i} W_{i} = \frac{1}{2} I_{i} W_{f}[/tex]

 [tex]2W_{i} = W_{f}[/tex]

Hence, which means that angular speed increases by a factor 2.

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The electric field strength between the plates is 7857 volts per meter.

Whatever place in space where a charge, in any form, exists has an electric property associated with it. This property is known as the electric field. Another metric for describing an electric field is the electric force per unit charge.

The most frequent causes of electric fields are shifting magnetic fields or electric charges. The SI unit volt per meter (V/m) is used to express the strength of an electric field.

The force operating on the positive charge is thought to be acting in the direction of the field. From a positive charge, the electric field radiates radially outward; from a negative charge, it radiates radially inward.

Between two uniform conducting plates, the size of the electric field is represented as

E = V/d

While d stands for the space between the plates, V represents the potential difference between them.

Potential is 550 V at a distance of 7 cm from the plate with zero volts (and 3.00 cm from the other).

Consequently, when we change the variables in the equation above, we get

E = 550V/ (7* 10⁻²m)

E = 78.57 * 10² V/m

As a result, the electric field strength between the plates is 7857 volts per meter.

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Total energy is defined as the sum of potential energy and kinetic energy and may be calculated using the formula: total energy = (row)*g*h + 1/2*m*v2.

Potential energy is the energy that a thing possesses in physics. due of the object's position in relation to other objects, internal tensions, electric charge, or other variables. A moving object or particle's kinetic energy, which depends on both mass and speed, is one of its characteristics. The type of motion can be vibration, translation, rotation around an axis, or any combination of these. Kinetic energy is a type of energy that an item or particle possesses as a result of motion. The energy that an object has as a result of its motion is known as kinetic energy (KE) in physics.

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Angular speed of the blade that the table saw,

ω = 2800 rev/min = 293.2

Diameter = 18 cm = 0.18 m

Radius = 0.09

To find linear velocity,

V = r X ω

V = 0.09 X 293.2

V = 26.38 m/s

Convert to mph

V = 58.8 mph

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The internal energy in substances is called intrinsic energy. It is the sum total of all energy possessed by constituting particles of a substance. This is represented by the symbol U.

Particles in a substance are in continuous motion. Kinetic energy is associated with them due to this motion of particles. Internal energy is directly linked with temperature. With the rise in temperature, kinetic energy due to motion of particles increases and hence total internal energy increases.

Internal energy is kinetic energy in particles, electrical energy of atoms, and energy stored in bonds.

It is given by the formula

ΔU = q + W

Here,

U = the change in internal energy.

q i= the heat

W = the mechanical work.

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The launch speed of a horizontally launched projectile that lands 26.3 meters from the base of a 19.3 meter high cliff is 13.22 m/s.

To determine the speed of the projectile, use the equation:

v = d/t

Where,

v = the speed (m/s)

d = distance (m)

t = period (s)

But first, we should calculate the time it took the projectile to land at the base of the cliff by using the maximum height formula:

h = ½ gt²

Where,

h is the height of the object

g is the acceleration due to gravity, and

t is the time it takes the object to fall to the ground.

We have;

Height = 19.3 m

Acceleration of gravity = 9.8 m/s²

Substituting the given parameters into the formula,

h = ½ gt²

19.3 = ½ (9.8) t²

19.3 = 4.9  t²

t² = 3.94

t = [tex]\sqrt{3.94}[/tex]

= 1.98 s

So,  the launch speed of the projectile:

v = d/t

= (26.3)/(1.99)

= 13.22 m/s

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The frequency of a light wave with a wavelength of 6.0 × 10⁷ and a speed of light of 3 × 10⁸ will be equal to 5.

The distance between two identical locations (adjacent crests) in successive cycles is known as the wavelength, and it is used to describe waveform signals that are transmitted over wires or into space.

Typically, in wireless systems, this length is specified in meters (m), centimeters (cm), or millimeters (mm). The wavelength is more frequently described in nanometers (nm), which are units of 10⁻⁹ m, or angstroms, which are units of 10⁻¹⁰ m, for infrared (IR), visible light (UV), and gamma radiation.

The wavelength of the light, λ = 6.0 × 10⁷

Then the frequency of the light will be,

λ = c/f

f = c/λ

f = (3 × 10⁸)/(6.0 × 10⁷)

f = 5

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The motorcycle is experiencing a deceleration of 4m/s². This is because the velocity of the motorcycle decreases with time.

Acceleration is the rate of change of the velocity of an object with respect to time taken. An object's acceleration is the net result of all the forces which are acting on the object. This can be best described by Newton's Second Law of Motion. The SI unit for acceleration is meter per second squared (m/s²).

The acceleration of the westward-moving motorcycle = Change in velocity/ time taken

a = (v-u)/ t

where, a = acceleration of the object,

u = initial velocity of the object,

v = final velocity of the object,

t = time taken by the object

a = (12 - 24)/ 3

a = -12/ 3

a = -4m/s²

Therefore, the acceleration of the motorcycle is -4m/s² i.e., deceleration of 4m/s².

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Sleep is very crucial in development of our muscular system. During sleeping blood flow in our body is most efficient.

One investigation discovered that a solitary evening of lacking rest didn't reduce how much power muscles can produce, yet a few sequential evenings of too little rest did. In this way, it's anything but a useful example to get into in the event that you're attempting to get more grounded, less fatty, and fabricate more characterized muscles.

High quality sleep is a fundamental component of living, and it has many advantages for wellbeing and prosperity. It could actually affect how your muscles become stronger preparation. Most grown-ups need somewhere in the range of 7 and 9 hours of rest each evening. There is such an incredible concept as getting an excess of rest as well.

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If the microwaves are incident on the horizontal wire grid, the reception becomes maximum.

If the electric field is along the direction of the bars then the polarizer will absorb its energy.

When the polarized microwaves with the electric field in the vertical direction passes through the vertical wire grid, the vertical electric field is dissipated in the wires and the reception is blocked. If the microwaves are incident on the horizontal wire grid, the reception becomes maximum.

The order of increasing energy is as follows

microwave < infrared < visible < ultraviolet

The term polarization commonly refers to the electric field component of the radiowave. In terrestrial microwave antennas, the polarization of the radio waves will be either horizontal or vertical. That is, the electric field will be either horizontal or vertically orientated.

Therefore, if the microwaves are incident on the horizontal wire grid, the reception becomes maximum.

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The number of loops in the output coil are 238 loops.

In a step-up transformer, the relationship between the number of turns in its primary coil Np, the number of turns in its secondary coil Ns, the input voltage Vp, the output voltage Vs, the input current Ip and the output current Is is given by:

Ns/Np = Vs/Vp = Ip/Is

Now, we need the relation between number of loops and current:

Ns/Np = Ip/Is

Given that, Np = 238 loops

Ns = ?

Ip = 2 A

Is = 2 A

Now, let us put the values in the above relation.

Ns = Ip/Is * Np = 2/2 * 238 = 238 loops

Thus, number of loops in output coil are 238 loops.

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Answer:

  neither

Explanation:

You want to know the greater of the forces of a man pushing a car uphill, or the car pushing on the man when velocity is constant.

Newton's third law of motion tells you for every action, there is an equal and opposite reaction. This means the force on the car is the same as the force on the man, since there is no net acceleration.

Neither force is larger: they are both the same.

__

Additional comment

If the car's velocity were increasing or decreasing, a net force would be indicated. That is, one or the other of the two forces would be larger.

When electrons move from a trajectory with a low energy level to a higher energy level, it absorbs energy called excitation.

At a certain stationary level electrons only have a certain level of energy anyway. The level of such energy is formulated.

[tex]E_{n} =\frac{-13.6z^{2} }{n^{2} } eV[/tex]

where Z  denotes an atomic normor, and n denotes a particular shell or a certain quantum number of an electron's stationary trajectory.

2s is on second  layer, so n = 2 and Z for Na is 11

Based on thus formula, energy for 2s electron is 1223 because we need higher energy to move from based layer than others

3.00 moles of magnesium are present in a sample of magnesium with a mass of 72. 9 g.

An estimation of the volume of material that makes up or is contained within a physical body. According to classical physics, an object's inertia and mass are connected because of the force needed to accelerate an item.

The amount of matter that makes up any item or body is best referred to as its mass. All of the objects we perceive have mass. There is mass in objects like tables, chairs, beds, footballs, glasses, and even air. As a result, every thing has a mass, which determines whether it is light or heavy.

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The change in internal energy for absorbing heat is 115J.

Total self-energy measurement is not possible. Its variation is measured and expressed as ΔU.

This variation depends on the transferred heat energy, light energy, or similar energy. You can also calculate the work done by the system or the work done on the system.

When a thermodynamic system transfers thermal energy to another system, the internal energies of the two systems change. Other state variables can also be changed.

When the structure of an atom or molecule changes, the internal chemical energy changes. In thermodynamics, the ideal gas concept is often used. This is an approximation of a real system used for educational purposes.

q=U+w

U=q-w

U=45-(-70)=115J

work for absorption is negative.

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The force that keeps the puck moving is 0.25 N while the velocity of the puck is  3.7 m/s.

We know that the centripetal force is the force that acts on a body that is moving along a circular path. In this case, we are told that the puck is moving along a circular path hence it is acted upon by the centripetal force that acts on it.

The centripetal force in this case would be supplied by the weight of the object that is moving in the circular path. Thus we can write in our equation that;

Centripetal force = Weight of object = mg

m = mass of the object

g = acceleration due to gravity

Then;

W = 0.026 Kg * 9.8 m/s^2

W = 0.25 N

To obtain the velocity of the object;

FT = mv^2/r

v = √ FT r/m

v =  √0.25 * 1.4/0.026

v = 3.7 m/s

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When the frequency of the light is increased, the stopping potential also increases. In your case, the stopping potential for a light of wavelength 200 nm is 1.93 V.

The photoelectric effect is the phenomenon in which electrons are emitted from a surface when exposed to light. In a photoelectric effect experiment, the stopping potential is the minimum voltage required to stop the electrons from being emitted. The stopping potential increases as the frequency of the light increases.

In this experiment, a light of wavelength 200 nm was used to illuminate the cathode, and the stopping potential was found to be 1.93 V. This indicates that the frequency of the light was just high enough to cause the electrons to be emitted, but not high enough to cause a larger potential to be required to stop the electrons. Therefore, if the frequency of the light increases, the stopping potential will also increase.

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If you want to maximize your potential energy, you can move the cart in any direction and get the same outcome because the distance it travels in each direction is equal.

The energy that a body possesses in its resting state is called its potential energy. The energy of a moving object is known as its kinetic energy. Stored energy that is conditional on the spatial orientation of the system's components; is also known as potential energy.

When a spring is either squeezed or stretched, the resulting increase in potential energy can be used to do work. Potentially, a steel ball has more energy in the air than it does when it hits the ground.

Here, we can observe that the carts are shifted to the right or left by one space. Consequently, the potential energy will also change in response to the motions.

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The right question is:

Cherise sets identical magnetic carts on two tracks. At the end of each track is a blue magnet that cannot move. Cherise can move the carts to one space to the left or one space to the right. Which movement will result in the largest increase in potential energy?

a. Moving the cart on Track 1 one space to the right (→).

b. Moving the cart on Track 2 one space to the left (←).

c. Moving the cart on Track 2 one space to the right (→).

d. All these movements will result in the same change in potential energy because they each move a cart the same distance.

Answer:

C

Explanation:

The velocity vs time graph will show how the velocity is changing with time as the object falls

The galaxy that our solar system belongs to is known as “The way of chopped hay galaxy” or “The Milky Way galaxy ” It takes an oval shape with coiled spiral arms extending from it, and the Sun lies on one of these spiral arms. The solar system consists of the Sun, the Planets, the Moons, the Asteroids, the Meteors, the Meteorites & the Comets.

Confined aquifers are surrounded by impenetrable rock, whereas unconfined are surrounded by penetrable rock- the one allows water in the other does not accept water unless an opening is opened.

Unconfined aquifers are those where the ground's rock is directly exposed at the surface and groundwater is continuously refilled, for instance by precipitation or snow melt. Thick deposits that surround an aquifer and keep it enclosed from the Earth's surface or other rocks are known as confined aquifers. A restricted aquifer is sometimes envisioned as an open-to-the-atmosphere water-bearing unit in the mountains that gets recharge from precipitation. The fine-grained sediments that enclose the water-bearing unit bury the laterally continuous water-bearing unit as it spreads into the valley. Unconfined aquifers are composed of sand, limestone, and gravel layers and are found underneath rivers and streams. Due to their considerably easier refill-ability and ability to maintain balance, unconfined aquifers would be more sustainable for irrigation.

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As the growing Jovian planets trapped gas from the solar nebula, the gas formed swirling disks around them, and condensation within those disks formed moons.

The moons formed from the largest protoplanets that cleared the solar nebula of gas. Jovian planets are much more like the Sun than the Earth.

Jovian's many moons are one of the unsolved mysteries of the formation of the solar system. Jovian planets formed far from the Sun, where ice and rock were abundant. The core quickly grew into a large mass of ice and rock.

Eventually, they grew so  large that their enormous gravitational pull trapped large amounts of hydrogen and other gases from  surrounding nebulae. These condensed to form enormous moons.

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Consider all six particles as a system. 25 is the translational angular momentum of the system with respect to the location of particle 5.

An object's mass and velocity combine to form momentum, more specifically linear momentum or translational momentum. It is a vector quantity since it has both a magnitude and a direction. An object has momentum of p if it has a mass of m and a velocity of v (also a vector quantity). The unit used to measure momentum is the kilogram meter per second (kg m/s), also known as the newton-second in the International System of Units (SI). Newton's second law of motion states that the rate of change of a body's momentum is equal to the net force applied to it. In an inertial frame, momentum is a conserved quantity regardless of the frame of reference. One can choose coordinate systems that take constraints and symmetries into consideration using Lagrangian and Hamiltonian mechanics, which are more complicated versions of classical mechanics. Generalized momentum, which generally differs from kinetic momentum, is the conserved quantity in these systems.

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For a pure resistance when a nonzero ac source is applied  the power is Negative or Positive

In a purely resistive circuit, the power is never zero. Moreover, this is due to the instantaneous values of the current and voltage being always negative or positive. Also, the frequency of the purely resistive circuit's power cycle is double that of the current and voltage waves.

A purely resistive circuit is a circuit that has inductance so small that at its typical frequency, its reactance is insignificant as compared to its resistance. Furthermore, in a purely resistive circuit, the whole of the utilized voltage is consumed in overcoming the ohmic resistance of the circuit itself. Also, another name for a purely resistive circuit is a non-inductive circuit.A circuit that contains only a pure resistance (ohms) in an AC circuit is called a Purely Resistive AC Circuit.

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