A chunk of beef has a mass of 11.6 grams and a volume of 58 cm3. What is the density of the chucky beef?

Group of answer choices

46.4

0

672.8

0.2

5

The energy lost is (e) heat. Allen's Rule applies to (b) warm-blooded species. The law stating energy cannot be created or destroyed is (a) the first law of thermodynamics.

In a trophic ladder, the form of energy lost in great quantities at every step is heat. This is due to the inefficiency of energy transfer between trophic levels, as some energy is lost as heat through respiration and metabolic processes.

Allen's Rule applies to warm-blooded species, as it states that animals in colder climates will have shorter limbs and extremities to minimize heat loss, while those in warmer climates will have longer limbs to dissipate heat more effectively. The first law of thermodynamics states that energy cannot be created or destroyed; it can only be changed from one form to another, making it the correct law in the context of the question.

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Answer:

Distancia = 50.04 metros

Explanation:

Dados los siguientes datos;

Velocidad = 10 km/h

Tiempo = 18 segundos

Para encontrar la distancia;

Conversión:

10 km/h = 10 * 1000/3600 = 2.78 m/s

Distancia = velocidad * tiempo

Distancia = 2.78 * 18

Distancia = 50.04 metros

Por lo tanto, el tren viajaría 50.04 metros antes de detenerse por completo.

Answer:

yes

Explanation:

yes

From the given information, the student knows that the elevator must be moving upwards as the acceleration is a positive number.

The force acting on a body is equal to the rate of change of momentum, according to Newton's second law of motion. The formula for force for a body with constant mass "m" is

F = ma where,                                                       (1)

F = force and

a = acceleration produced in the body.

Given,

Weight of student = 615N

To calculate mass, we use M(mass)= W(weight)/G(gravity)

= 615/9.8

= 62.7

Now, as the student's weight decreases, the scale shows an increase in that weight.

The apparent weight is 645N = mg

Now, we know that

Force(F) = mg – R                                                     (2)

where R is the actual weight.

Equating equations (1) and (2), we get

ma = mg - R

62.7×a = 645 - 615

62.7×a = 30

a = 0.478 m/s²

The elevator moves upward because the acceleration is a positive number.

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"This is the complete question.

A 615 N student standing on a scale in an elevator notices that the scale reads 645 N. From this information, the student knows that the elevator must be moving

a) downwards

b) upwards

c) you cannot tell if it is moving upward or downward."

From this information, the student knows that the elevator must be moving upwards .

The behavior of objects for which all external forces are balanced is predicted by Newton's first law of motion. According to the first law, sometimes known as the law of inertia, an object's acceleration will be zero meters per second per second if the forces acting on it are evenly distributed. When everything is in balance, or equilibrium, objects cannot accelerate. According to Newton, an item will only accelerate if another force is operating on it that is net or imbalanced. If an imbalanced force is present, the object will accelerate and change its direction and speed, or both.

We need to use Newtons second law of motion here.

So,

Mass of student

= 615/9.81

= 62.7

Weight of student act downward and the reaction of his weight act upward on the scale.

↑F = ma

645 - 615

= 62.7 a

a = 0.478 m/\(s^{2}\)

So the acceleration is a positive value hence  the elevator goes upward.

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Answer:

magnitude = 13.02 m/s

direction = 86.9 degrees relative to ground.

Explanation:

We need to compose the velocities in perpendicular directions using the Pythagoras theorem to find the magnitude of the composition:

magnitude of new velocity: \(\sqrt{13^2+0.7^2} \approx 13.02\,\,m/s\)

The direction will be given by the angle relative to ground using the arctan function:

\(\theta=arctan(\frac{13}{0.7}) =86.9^o\)

Answer:

According to the Pythagorean theorem, the magnitude of the balloon’s velocity relative to the ground is = 13.02 ≈13.0 meters/seconds. The direction of the balloon relative to the ground is 3° northeast.

Explanation:

Plato/Edmentum

Answer:

it is 4.67921098559 astronomical units

Explanation:

An asteroid that is 700,000,000 km is equivalent to 4.67 AU.

Option D is the correct answer.

Given that an asteroid that is 700,000,000 km from Earth.

We know that 1 AU is equal to 149597870.691 KM. The expression can be given below.

\(1 \;\rm AU = 149597870.691\;\rm KM\)

\(1 \;\rm KM = \dfrac {1}{149597870.691} \;\rm AU\)

\(700,000,000 \;\rm KM = \dfrac {1}{149597870.691} \times 700,000,000 \;\rm AU\)

\(700,000,000 \;\rm KM = 4.67 \;\rm AU\)

Hence we can conclude that 700,000,000 km is equivalent to 4.67 AU. Option D is the correct answer.

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Two cups are filled to the same level with water. one of the two cups has plastic balls floating in it. if the density of the plastic balls is less than that of ice, the two cups will; tend to weighs the same.

The mass contained in a given volume determines a material's density. Due to their tight structure and stronger intermolecular force than that of liquids and gases, solids often have denser molecules than liquids. However, compared to ice, which is a solid form of water, liquid water has a higher density.

Therefore, two cups have the same weight since the weight of the plastic ball is precisely equal to the weight of the displaced water, according to Archimedes' Principle sue to the fact that the Buoyant force need to be equal the weight of the ball.

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Answer:

A sound wave is the pattern of disturbance caused by the movement of energy traveling through a medium such as air, water, or any other liquid or solid matter, as it propagates away from the source of the sound. The source is some object that causes a vibration, such as a ringing telephone, or a person's vocal chords.

Explanation:

Answer:

(a) The weight of the wood is approximately 5,886 N

(b) The weight of the stone is approximately 1,962 N

Explanation:

The given parameters are;

The base area of the wood, A = 1 m × 1 m = 1 m²

The depth to which the wood is submerged below the water, d = 0.6 m

The depth further the wood sinks when a stone is placed on the wood, Δd = 0.2 m

The density of water, ρ = 1,000 kg/m³

(a) Archimedes' principle states that the up-thrust, or upward force acting on an object submerged in a fluid, is equal to the weight of the displaced fluid.

For a floating object such as the wood, the up-thrust is equal to the weight of the object

The weight of the water displaced, W = The volume of the displaced water, V × The density of the water, ρ × The acceleration due to gravity, g

W = V × ρ × g

'V' is the same as the volume of the submerged wood, therefore;

V = A × d = 1 m × 1 m × 0.6 m = 0.6 m³

g ≈ 9.81 m/s²

Therefore;

W = 0.6 m³ × 1,000 kg/m³ × 9.81 m/s² ≈ 5,886 Newtons

The weight of the water displaced, W ≈ 5,886 N = The up-thrust = The weight of the wood

∴ The weight of the wood, W ≈ 5,886 N

(b) Similarly, the weight of the stone, \(W_{stone}\) is equal to the weight of the additional volume of water displaced

∴ \(W_{stone}\) = A × Δd × ρ × g

By plugging in the values, we get

\(W_{stone}\) ≈ 1 m² × 0.2 m × 1,000 kg/m³ × 9.81 m/s² = 1,962 N

The weight of the stone, \(W_{stone}\) ≈ 1,962 Newtons

HEY HEY HEY HEY

Explanation:

HEY HEY HEY HEY HEY

Answer:

Pakistan has low rates of non renewable energy thus it is mandatory that the renewable resources be put into use. The vast deserts in punjab and sindh should be used to set up solar panels and the coastal areas of sindh and balochistan should be used as wind power. The northern areas have melting glaciers and high precipitation rates rates thus HYDEL power should be used in the form of dams

The magnitude of smaller and larger radius is 45mm and 90mm respectively.

Using lens makers formula:

1/f = (n-1) (1/ \(r_{1}\) - 1/ \(r_{2}\))

where n is the index of refraction, \(r_{1}\) and f is the focal length and the curvature's radius of the first surface the light touches, and \(r_{2}\) is the second's radius of curvature. The radius of one surface is two times that of the other,  such that one is concave to the incoming light and the other is convex.

Plugging in the values we get:

1/f = (n-1) (1/ \(r_{1}\) + 1/ \(2r_{1}\))  = 3(n-1) / 2\(r_{1\)

(a) For magnitude of smaller radius:

3(n-1)f / 2 = 3(1.5-1)(60) / 2 = 45mm

(b) For larger radius:

\(r_{2} = 2r_{1}\) = 90mm

Therefore, the magnitude of smaller and larger radius is 45mm and 90mm respectively.

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Answer:

A

Explanation:

Answer:

Rae Young at Bell Labs. They diagrammed a network of wireless towers into what they called a cellular layout. Cellular was the chosen term because each tower and its coverage map looked like a biological cell. Eventually, phones that operated on this type of wireless network were called cellular phones.

Explanation:

The minimum amount of work done by the force on the object is 100 joules (J).

The minimum amount of work that a force can do on an object can be determined using the formula:

Work = Force x Distance x cos(θ),

where "Force" is the magnitude of the force applied, "Distance" is the distance over which the force is applied, and "θ" is the angle between the force vector and the direction of displacement.

In this case, the force magnitude is given as 10 N, and the object moves at a distance of 10 m. However, the question asks for the minimum amount of work, which occurs when the force is applied parallel to the direction of motion. In this scenario, θ = 0 degrees, and cos(0) = 1.

Therefore, the minimum amount of work done by the force can be calculated as:

Work = 10 N x 10 m x cos(0) = 100 N·m.

Hence, the minimum amount of work done by the force on the object is 100 joules (J). It is important to note that this value assumes an ideal scenario where there is no loss of energy due to factors like friction or other resistive forces.

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The ticker tape is pulled through the timer once it's powered, which creates a dot along the length of this paper tape at fixed time intervals.

A ticker timer can be defined as a scientific apparatus that is designed and developed to measure time in seconds. Thus, a ticker timer can be used to measure short intervals of time by making dots on a paper tape at regular (fixed) intervals.

By design, a ticker timer comprises a magnet, carbon paper disk and a ticker tape which is pulled through the timer once it's powered, so as to create a dot along the length of this paper tape at fixed time intervals.

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The deflecting electric field is 0.83mv/m

Acc. to the newtons 2nd law - there is an acceleration when a force acts on an object.

F = ma     (equation 1)

where

F is force

m is mass of object

a is acceleration

Electric field intensity- it is defined as force experienced by a unit positive charge placed at that point.

it is denoted by E = F/q

where

F is force

q is the charge

F = Eq     (equation2)

from 1 and 2 equation we get

ma = Eq

E = ma /q

Charge on the drop of ink.is q.

(e is the charge on an electron.)

so,

q = 751896×e

q = 751896×1.6 ×⁻¹⁹

q = 12.03 ×10⁻¹⁴

m = 10⁻¹¹kg

a = 10⁴ m/s²

using above values

E = ma /q

E = 10⁻¹¹×10⁴/12.03 ×10⁻¹⁴

E = 0.83mv/m

The deflecting electric field is 0.83mv/m

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Answer:

Inches

Explanation:

An inch is a unit of measurement in the Imperial system of measurement. Everything else is used in the International System of Units.

The unit of measure never is used in the International System of Units is inches. The correct option is A.

The International System of Units, abbreviated SI in all languages and sometimes pleonastically as the SI system, is the modern version of the metric system and the world's most widely used measurement system.

The International System of Units (SI), also known as the French Système International d'Unités, is a decimal international system of weights and measures derived from and expanding on the metric system of units.

The 11th General Conference on Weights and Measures adopted it in 1960, and it is abbreviated SI in all languages.

The International System of Units (SI) is a measurement system based on seven basic units: the metre (length), kilogram (mass), second (time), ampere (electric current), kelvin (temperature), mole (quantity), and candela. These base units can be combined with one another.

Thus, the correct option is A.

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Answer:

B

Explanation:

B

Answer:

A. That enough light of any frequency would cause electrons to flow.

Explanation:

A P E X

Scientists using classical, Newtonian physics expect to observe the photoelectric effect because enough light of any frequency would cause electrons to flow.

When a medium receives electromagnetic radiation, electrostatically charged particles are emitted from or inside it.

The emission of ions from a steel plate when light falls on it is a common definition of the effect. The substance could be a solid, liquid, or gas; and the released particles could be protons or electrons.

Scientists using classical, Newtonian physics expect to observe the photoelectric effect because enough light of any frequency would cause electrons to flow.

The flow of the electron is a must to understand the photo electric effect.

Hence option A is correct.

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The maximum acceleration of the block occurs when its velocity is zero.

Simple harmonic motion is a unique sort of periodic motion in mechanics and physics where the restoring force on the moving item is directly proportional to the amount of the object's displacement and acts in the direction of the object's equilibrium position. It is also referred to as SHM. If friction or any other energy dissipation is not there, it leads to an oscillation that lasts forever.

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When a meter stick is placed on a support, such as a pivot or fulcrum, it will balance if the center of mass of the meter stick is directly above the support. This is because the center of mass is the point where the weight of the meter stick can be considered to be concentrated, and if this point is directly above the support, the weight will be balanced.

If the center of mass of the meter stick is not directly above the support, the meter stick will not be balanced and will tip over. This is because there will be a net torque acting on the meter stick, which is the product of the weight force and the distance between the center of mass and the support. If the torque is non-zero, the meter stick will rotate until the torque is balanced.

Therefore, to ensure that the meter stick is balanced on the support, the center of mass must be located at the support position. If the center of mass is not at the support position, the meter stick will not balance and will either tip over or rotate until it reaches a balanced position.

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a) 2.0 represents the initial position of the ball,  -3.6 represents the initial velocity of the ball  and 1.7 represents the acceleration of the ball.

b)The unit of 2.0 is meters, the unit of -3.6 is meters per second, and the unit of 1.7 is meters per second squared.

c) Position of of ball at t=1, 2, 3 are -1.9, 5.4 and 9.1 meters respectively

d) Average velocity is 5.5 meter per second

Part a

In the equation x = 2.0 - 3.6t + 1.7t2, the number 2.0 represents the initial position of the ball (i.e., the position of the ball at t = 0 seconds), -3.6 represents the initial velocity of the ball (i.e., the velocity of the ball at t = 0 seconds), and 1.7 represents the acceleration of the ball.

Part b

The unit of 2.0 is meters, the unit of -3.6 is meters per second, and the unit of 1.7 is meters per second squared.

Part c

To determine the position of the ball at t = 1.0 s, 2.0 s, and 3.0 s, we simply substitute these values into the equation:

When t = 1.0 s: x = 2.0 - 3.6(1.0) + 1.7(1.0)^2 = -1.9 meters

When t = 2.0 s: x = 2.0 - 3.6(2.0) + 1.7(2.0)^2 = 5.4 meters

When t = 3.0 s: x = 2.0 - 3.6(3.0) + 1.7(3.0)^2 = 9.1 meters

Part d

The average velocity over the interval t = 1.0 s to t = 3.0 s can be calculated by taking the displacement of the ball during this time interval and dividing it by the time interval:

Displacement = x(3.0) - x(1.0) = 9.1 - (-1.9) = 11.0 meters

Time interval = 3.0 s - 1.0 s = 2.0 s

Average velocity = Displacement / Time interval = 11.0 meters / 2.0 seconds = 5.5 meters per second.

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Answer:

the Noble gases

Explanation:

the Noble gases are atoms that do not easily react with or form bonds with other atoms

Answer:

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Explanation:

Answer:

The force the archer need to pull in order to achieve the height is approximately 101.8 N

Explanation:

By energy conservation principle, puling an elastic bow with a force, for a given distance, performs work which is converted to the potential energy of the arrow at height

The given parameters are;

The mass of the arrow, m = 45.0 grams = 0.045 kg

The distance the elastic bow is pulled, d = 65.0 cm = 0.65 m

The height at which the arrow is reaches, h = 150.0 meters

Let 'F', represent the force the archer need to pull in order to achieve the height

Work done, W = Force × Distance moved in the direction of the force

Therefore;

The work done in pulling the arrow, W = F × d

By energy conservation, we have;

The work done in pulling the arrow, W = The potential energy gained by the arrow, P.E.

W = P.E.

The potential energy gained by the arrow, P.E. = m·g·h

Where;

m = The mass of the arrow

g = The acceleration due to gravity = 9.8 m/s²

h = The height the arrow reaches

∴ by plugging in the values, P.E. = 0.045 kg ×9.8 m/s² × 150 m = 66.15 J

W = F × d = F × 0.065 m

Also, W = P.E. = 66.15 J

∴ W = F × 0.065 m = 66.15 J

F × 0.065 m = 66.15 J

F = 66.15 J/(0.65 m) = 1323/13 N ≈ 101.8 N

The force the archer need to pull in order to achieve the height, F ≈ 101.8 N.

The speed of rocket alpha as measured from rocket bravo is 0.31c due to head-on collision.

In physics, the change in momentum causes a head-on collision. As was already explained, an object's momentum is a property that results from a change in velocity in reaction to an applied force. Before a collision may occur, the momentum must equal zero and this is called head-on collision.

The target particle's velocity following a head-on impact in which the projectile is significantly more massive than the target will be roughly twice that of the projectile, but the projectile's velocity will remain practically unaltered.

speed of rocket alpha=0.90 c

speed of rocket bravo=0.52c

Now, in order to find the speed of rocket alpha measured from rocket bravo =0.90-0.52c

speed=0.31c

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The speed of the rocket alpha when observed from rocket bravo is calculated to be 1.42c.

Alpha rocket is travelling at a speed of 0.90c, while Bravo rocket is flying at a speed of 0.52c.

The two rockets are heading straight at one another in the same direction to collide.

When the rocket's frame of reference is the Bravo rocket, the rocket's speed can both be perceived from the earth's perspective and

Therefore, the rocket Bravo is moving, and the rocket Alpha will approach it more quickly.

If Rocket Alpha's speed is V₁ and Rocket Bravo's speed is V₂, then Rocket Alpha's speed from Rocket Bravo is V₁₂.

V₁₂ = 0.52 -(-0.90)

V₁₂ = 1.42c

Therefore, the rocket alpha's speed from the rocket bravo is 1.42c.

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