Which of the following divisions of time is NOT based on an orbital property of the Earth, Sun, and Moon?

1 The year

2 the Month

3 the day

Answer:

Patterson isolated lead from fragments of a meteorite that had struck Earth thousands of years ago, and determined the age of the fragments by analyzing proportions of the lead isotopes. The meteorite is assumed to have been formed at the same time as the rest of the solar system, including Earth

Explanation:

If Mr. Vinny's mass is 76 kg, the scale read 744N in Newtons when the elevator is at rest

What does "gravitational acceleration" mean?

Acceleration owing to gravity is the term used to describe the speed at which freely falling bodies accelerate due to the force of the other body's attraction. It is a constant amount for a specific attracting body at a specific location. The average acceleration caused by gravity is 9.8 m/s2, just as it is for earth on or near its surface.

Inertia is a fundamental characteristic of all matter and is quantifiably measured by mass. The resistance a body of matter offers to a change in its speed or location as a result of the application of a force is what it is in essence. The change a force applies produces a change that is smaller the more mass a body has.

When the elevator is at rest,

m is 76kg

The scale will read mg i.e. 76*9.8 ⇒744N

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The initial compression of the spring required for the block to have a speed of 2.3 m/s after crossing the rough patch is 0.067 m.

The initial potential energy of the block when held at rest against the spring is given by:

PE = (1/2)kx², where k is the force constant of the spring and x is the distance the spring is compressed. Therefore, we have:

PE = (1/2)(730 N/m)d²

When the block is released, it starts moving and loses some of its initial energy due to friction on the rough patch. The work done by friction can be found by:

W = μN(d), where μ is the coefficient of kinetic friction, N is the normal force, and d is the width of the rough patch.

The normal force is given by:

N = mg, where m is the mass of the block and g is the acceleration due to gravity.

Thus, the work done by friction is:

W = μmg(d)

The change in kinetic energy of the block is equal to the work done by the spring minus the work done by friction. Therefore:

(1/2)mv² = (1/2)kx² - μmgd

Substituting the given values of mass, coefficient of friction, and final velocity, we get:

(1/2)(1.2 kg)(2.3 m/s)² = (1/2)(730 N/m)d² - (0.44)(9.8 m/s²)(1.2 kg)(0.05 m)d

Solving for d, we get:

d ≈ 0.097 m

Therefore, the block should be compressed by approximately 9.7 cm for it to have a speed of 2.3 m/s after crossing the rough patch.

Note: This solution assumes that the spring is a linear spring obeying Hooke's Law.

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Explanation:

Using Cosine rule, we have 5² = 3² + 4² - 2(3)(4)(cosx).

=> cosx = 0, x = 90°.

Answer: The answer is D

Explanation:

The integral of 1/(1 + x²) is (1/2)ln|1 + x²| + C where C is the constant of integration.

Integration is a mathematical process of finding the antiderivative of a function. To integrate the given expression 1/(1 + x²), we will use the substitution method.

Let u = 1 + x², du/dx = 2x dx, then dx = du/2x and the integral becomes:

∫1/(1 + x²) dx = ∫1/u * (1/2x) du= (1/2)∫1/u du

The antiderivative of 1/u is ln|u| + C, where C is the constant of integration.

Therefore, the final solution of the integral is (1/2)ln|1 + x²| + C.

Let us work through the steps:

Step 1:Let u = 1 + x² and then differentiate both sides with respect to x to obtain du/dx. du/dx = 2x

Substitute 2x dx = du into the integral ∫1/(1 + x²) dx to get the integral in terms of u:∫1/u * (1/2x) du = (1/2) ∫1/u du

Step 2:Calculate the antiderivative of 1/u, which is ln|u|. Thus, the final solution is (1/2)ln|1 + x²| + C, where C is the constant of integration. The constant C will vary depending on the initial conditions of the problem.

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Answer:

8.40 is your answer.

Explanation:

The average power  she produces in a day be   97.22 Watts.

The quantity of energy moved or converted per unit of time is known as power in physics. The watt, or one joule per second, is the unit of power in the International System of Units. Power is also referred to as activity in ancient writings. A scalar quantity is power.

Marcia consumes total amount of energy per day = 2000 calories = 8.4 × 10⁶ joule.

1 day = 24 × 60 × 60 second = 86400 second

So, average power  she produces in a day = energy/time

=  8.4 × 10⁶ joule/86400 second

= 97.22 Watts

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The steel sphere does not experience any change in its radius as it sinks to a depth with a specific pressure. The change in the radius of the sphere is approximately 0.375 m.

The pressure at a certain depth in a fluid is given by the equation P = ρgh, where P is the pressure, ρ is the density of the fluid, g is the acceleration due to gravity, and h is the depth. In this case, the pressure is given as 15 MN/m², which can be converted to Pascals (Pa) by multiplying by 10⁶.

Using the equation for pressure, we can find the depth at which the sphere sinks. The pressure at this depth is equal to the pressure inside the sphere, which is given by the equation P = (2/3)BΔV/V, where B is the bulk modulus of the material, ΔV is the change in volume, and V is the original volume of the sphere.

We can rearrange this equation to solve for ΔV/V:

ΔV/V = (3P)/(2B)

Now, we can calculate the change in volume by multiplying ΔV/V by the original volume of the sphere, which is (4/3)πr³. The change in volume can be expressed as ΔV = (4/3)π(r+Δr)³ - (4/3)πr³, where Δr is the change in radius.

Substituting the expression for ΔV/V and the original volume into the equation, we have:

(4/3)π(r+Δr)³ - (4/3)πr³ = (4/3)πr³[(3P)/(2B)]

Simplifying and rearranging the equation, we get:

(r+Δr)³ - r³ = r³[(3P)/(2B)]

Expanding the left side of the equation and canceling out the terms, we have:

3r²Δr + 3r(Δr)² + (Δr)³ = (3P)/(2B)

Since the change in radius is assumed to be small, we can neglect the higher-order terms (Δr)² and (Δr)³. Thus, the equation becomes:

3r²Δr = (3P)/(2B)

Solving for Δr, we get:

Δr = (P/B) / (2r)

Substituting the given values for P (15 MN/m²) and B (1.6 x 10¹¹ N/m²), and the radius of the sphere (2.0 m), we can calculate the change in radius:

Δr = (15 x 10⁶)/(1.6 x 10¹¹) / (2 x 2.0) ≈ 0.375 m

Thus, the change in the radius of the sphere is approximately 0.375 m.

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On a planet, an astronaut determines the acceleration of gravity using a 1-meter long pendulum with a period of 1.5 seconds: the acceleration of gravity on the planet is approximately 17.56 meters per second squared.

To find the acceleration of gravity in meters per second squared, we can use the formula for the period of a simple pendulum:

T = 2π√(L/g),

where T is the period, L is the length of the pendulum, and g is the acceleration of gravity. Given the period T=1.5 seconds and the length L=1 meter, we can rearrange the formula to solve for g:

g = (4π²L)/T².

Substituting the given values:

g = (4π²(1))/(1.5²)

g ≈ 17.56 meters per second squared.

Therefore, the acceleration of gravity on the planet is approximately 17.56 meters per second squared.

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Answer:

$10 a g

Explanation:

Answer:

As The mass of the beach ball is having lowest magnitude when compared with the other balls given so when apply the same magnitude of force to all the balls then the beach ball due to its lighternessand also its inertia of rest would not resist the force so much so when you apply the force to this ball it would starts to roll and covers the maximum diatance whwn compared with the other ball only in the condition when same magnitude of force applied.Thats this ball would do more work than the other ball.The mass also influences the velocity carried by the body and also the kinetic energy possessed by the body. More the force applied more the distance it would cover

Hope it helps

We can calculate the refractive index by substituting the values into the formula: n = √(1 - (2.774 × 10^6 / f)^2). The refractive index of the ionospheric layer can be determined using the formula n = √(1 - (f_ce / f)^2)

(a) The refractive index of the ionospheric layer can be determined using the formula n = √(1 - (f_ce / f)^2), where n represents the refractive index, f_ce is the electron gyrofrequency, and f is the frequency of the incident wave.

The electron gyrofrequency (f_ce) can be calculated using the formula f_ce = 8.978 × √(N), where N is the electron density. Substituting the given electron density value, we have f_ce = 8.978 × √(24.536 × 10^11) ≈ 2.774 × 10^6 Hz.

Now, we can calculate the refractive index by substituting the values into the formula: n = √(1 - (2.774 × 10^6 / f)^2).

(b) The critical frequency for the communication link can be determined using the formula f_c = f_ce / sin(θ), where f_c represents the critical frequency and θ is the angle of incidence. Substituting the given angle of 60°, we have f_c = 2.774 × 10^6 Hz / sin(60°).

(c) The maximum usable frequency (MUF) can be calculated using the formula MUF = f_c / sin(θ). Substituting the critical frequency and angle of incidence given in parts (b) and (a), respectively, we can find the MUF.

(d) Transmissions would fail at the frequencies of 10 MHz and 30 MHz because they are below the critical frequency. The critical frequency represents the maximum frequency that can be reflected back to Earth by the ionospheric layer. If the frequency of the transmission is below the critical frequency, the wave would penetrate through the ionosphere and not be reflected back, leading to a failed transmission.

(e) The ionosphere bends high-frequency radio waves towards Earth due to the phenomenon of refraction. When a radio wave encounters the ionosphere, which is composed of charged particles, it experiences a change in speed and direction. This change in speed and direction is due to the varying density and composition of the ionosphere at different altitudes.

As the radio wave passes through the ionosphere, its path is curved downward towards the Earth's surface. This bending phenomenon occurs because the refractive index of the ionosphere is greater than that of the surrounding vacuum or atmosphere. The higher the frequency of the radio wave, the greater the bending effect due to the higher electron density in the ionosphere at higher altitudes.

This bending of high-frequency radio waves allows for long-distance communication by enabling the waves to travel beyond the line-of-sight. It plays a crucial role in long-distance radio communication, especially in areas where direct line-of-sight transmission is obstructed by the Earth's curvature or other obstacles.

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Answer:

3,544.375Joules

Explanation:

Kinetic energy is the energy possessed by a body by virtue of its motion, It is expressed as;

Kinetic energy = 1/2mv²

m is the mass of the body

v is the velocity

For the ball carrier;

KE = 1/2(75)(6.5)²

KE = 3168.75/2

KE = 1584.375Joules

For the defender;

KE = 1/2(80)(7)²

KE = 3920/2

KE = 1960Joules

The kinetic energy of the ball carrier/defender system BEFORE the tackle = KE for the carrier + KE for the defender

kinetic energy of the ball carrier/defender system BEFORE the tackle= 1584.375+1960 = 3,544.375Joules

Answer:

The answer is D

Explanation:

It reduces the amount of thermal energy that is transferred from outside to inside the container.

hope this helps

may i have brainliest pls

The foam reduces the amount of thermal energy that is transferred from outside to inside of the container, which prevents frozen food from melting. Thus, option D is correct.

Thermal energy is the energy present in the system that mainly depends on its temperature. Heat is the flow of thermal energy. When temperature increases in the system, the vibration of molecules increases more heat energy is released.

It is also defined as the transfer of heat energy between the systems and also the work done in the transfer of heat. When a substance is changed from one state to another state of matter, heat energy is released.

The material that prevents the heat (thermal energy) passes through them is called a thermal insulator. A foam is considered a good insulator and it is used to prevent frozen food from melting.

Foam is a thermal insulator that prevents heat flow and reduces the amount of thermal energy that is transferred from outside to inside the container.

Hence, the ideal solution is option D.

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The spring stiffness, or spring constant, of the given perfect spring is approximately 137.9623 N/m. This means that for every meter of extension, the spring will exert a force of 137.9623 N.

This value was obtained by applying Hooke's Law and calculating the ratio of the change in force to the change in extension using two data points from the table.

To determine the spring stiffness, we need to calculate the spring constant (k) using Hooke's Law, which states that the force applied on a spring is directly proportional to the extension it undergoes.

Hooke's Law can be represented as F = kx, where F is the applied force and x is the extension of the spring.

In the given table, we have the applied forces (F) and corresponding extensions (x). We can use any two data points from the table to find the spring constant.

Let's choose the first and last data points from the table:

(x1, F1) = (0.43 m, 59.34 N) and (x2, F2) = (0.96 m, 132.48 N).

Using Hooke's Law, we can calculate the spring constant (k) as follows:

k = (F2 - F1) / (x2 - x1)
  = (132.48 N - 59.34 N) / (0.96 m - 0.43 m)
  = 73.14 N / 0.53 m
  ≈ 137.9623 N/m (rounded to 4 decimal places)

Therefore, the spring stiffness, or spring constant, is approximately 137.9623 N/m.

Hooke's Law is a fundamental concept in physics that describes the relationship between the force applied on a spring and the resulting extension it undergoes.

The formula F = kx represents this relationship, where F is the applied force, k is the spring constant, and x is the extension of the spring.

By using two data points from the table, we can calculate the spring constant by finding the ratio of the change in force to the change in extension.

This calculation allows us to quantify the stiffness of the spring.
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Given information: The average method reports the following unit data for the forming department. Units completed in the forming department are transferred to the painting department. Production cost information for the forming department follows.

Direct materials:
Units completed during the period = 45,000 units
Ending work in process inventory = 5,000 units
Direct materials cost = $202,500

Conversion costs:
Units completed during the period = 45,000 units
Ending work in process inventory = 5,000 units
Conversion cost = $189,000

a. Calculation of equivalent units of production for both direct materials and conversion for the forming department:
Equivalent units of production = Units completed during the period + (Ending work in process inventory * Degree of completion)
Direct materials:
Equivalent units of production = 45,000 + (5,000 * 50%) = 47,500 units

Conversion costs:
Equivalent units of production = 45,000 + (5,000 * 60%) = 48,000 units

b. Calculation of the cost per equivalent unit of production for both direct materials and conversion for the forming department:
Cost per equivalent unit of production = Total cost for the period / Equivalent units of production

Direct materials:
Cost per equivalent unit of production = $202,500 / 47,500 units = $4.26 per unit

Conversion costs:
Cost per equivalent unit of production = $189,000 / 48,000 units = $3.94 per unit

c. Calculation of the cost assigned to the forming department's output using the weighted average method:
Total cost = Cost of units transferred out + Cost of ending work in process inventory
Cost of units transferred out = Number of units transferred out * Cost per equivalent unit of production
Cost of ending work in process inventory = Number of units in ending work in process inventory * Cost per equivalent unit of production

Direct materials:
Cost of units transferred out = 40,000 * $4.26 per unit = $170,400
Cost of ending work in process inventory = 5,000 * $4.26 per unit = $21,300
Total cost = $170,400 + $21,300 = $191,700

Conversion costs:
Cost of units transferred out = 40,000 * $3.94 per unit = $157,600
Cost of ending work in process inventory = 5,000 * $3.94 per unit = $19,700
Total cost = $157,600 + $19,700 = $177,300

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If the voltage drop is less than 0.5 volts, then measure the voltage drop on the starter ground circuit.When troubleshooting electrical systems, it is important to identify potential issues with voltage drops.

A voltage drop occurs when there is a loss of voltage across a circuit or component due to resistance. If the voltage drop is less than 0.5 volts, it suggests that the circuit is functioning properly and there is minimal resistance.

In the case of the starter ground circuit, it is crucial for the starter motor to have a reliable ground connection to function efficiently. By measuring the voltage drop on the starter ground circuit, we can determine if there are any excessive resistances that might be hindering the starter motor's performance.

If the voltage drop on the starter ground circuit is greater than 0.5 volts, it indicates a potential problem with the ground connection. This could be due to corroded terminals, loose connections, or damaged wiring. In such cases, it is necessary to inspect and repair the ground circuit to ensure proper functioning of the starter motor.


To summarize, if the voltage drop is less than 0.5 volts, measuring the voltage drop on the starter ground circuit is necessary to ensure the ground connection is optimal. This helps in identifying any potential issues with excessive resistance and allows for appropriate troubleshooting and repairs if needed.

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Answer:

Explanation: To compute the time required for the specimen to reap a grain diameter of five.Five × 10^(-2) mm at the same time as being heated at 575°C, we are able to use the grain increase equation:

(d2/d1) = exp(k*t)

where d2 is the very last grain diameter (5. Five × 10^(-2) mm), d1 is the initial grain diameter (2.4 × 10^(-2) mm), ok is the fee consistent, and t is the time.

First, we want to discover the charge constant, k? We can use the given information approximately the warmth treatment to calculate it:

(d2/d1) = (four.1 × 10^(-2) mm) / (2.4 × 10^(-2) mm) = 1.708

exp(k*t) = 1.708

Using the exponent property of logarithms, we can rewrite this equation as:

okay*t = ln(1.708)

Now, we can calculate the cost of k*t:

k*t = ln(1.708)

t = ln(1.708) / k

To find the time required for the specimen to gain a grain diameter of 5.5 × 10^(-2) mm, we want to replacement the fee of k from the given facts:

k = n * (d1^(-n))

ok = 2.2 * (2.Four × 10^(-2) mm)^(-2.2)

Now, we can replace the price of ok into the equation to find t:

t = ln(1.708) / k

Calculate the fee of ok and then alternative it into the equation to decide the time required for the specimen to gain the favored grain diameter of five.Five × 10^(-2) mm.

Answer:

0.75kg into gram = 0.75 * 1000 = 750g

potential energy = mgh

potential energy = 750 * 10 * 0.35

potential energy = 2625 joules

Answer:

The group one element are called alkali because when they dissolved in water they form alkaline solutions

Ignoring the mass of duct tape and plastic in the bottles, a child will need at least 4 water bottles to stay dry on the raft. The child will need at least four water bottles to stay dry on the raft.

The buoyancy force exerted by the water on the raft must be greater than or equal to the weight of the child to keep the child afloat and dry on the raft. The buoyancy force is given by Archimedes' principle, which states that it is equal to the weight of the water displaced by the raft.

The volume of each 1.0 L water bottle is 0.001 m^3. The density of water is approximately 1000 kg/m^3. Therefore, each water bottle has a buoyant force of:

Buoyant force = Volume of water displaced x Density of water x Acceleration due to gravity

Buoyant force = 0.001 m^3 x 1000 kg/m^3 x 9.81 m/s^2

Buoyant force = 9.81 N

To find the minimum number of water bottles needed to keep the child afloat, we need to divide the weight of the child by the buoyant force of one water bottle:

Minimum number of water bottles = Weight of child / Buoyant force per bottle

Minimum number of water bottles = 32 kg / 9.81 N

Minimum number of water bottles = 3.26 (rounded up to 4)

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Explanation:

First train has 2 hr * 45 km/hr = 90 km   head start

  Closing speed between the two trains   745 - 45 = 30 km

to cover the 90 km between them will take 3 hours

  and the second train will be at  75 km/hr * 3 hr = 225 km from the station

Answer:

The correct option is;

Adrenalin

Explanation:

The presence of Adrenalin can cause headaches, memory loss, confusion, make a person unable to concentrate, and therefore, generally affects the mode in female, as such it is important for a decrease the level of Adrenalin by exercising, which causes the Adrenalin and cortisol to reduce in a similar  way to consuming gasoline by burning gasoline, cardiovascular exercises burns Adrenaline.

Doing exercises causes adrenaline and cortisol, which are the body's stress hormones to be reduced.

Answer:

It's adrenaline

Explanation:

I just took a quiz and got it right

The steepest angle to which a material can be piled without slumping/sliding downslope is referred to as the angle of repose.

The correct option is D.

The steepest angle of fall or dip in relation to the horizontal plane that a material may be piled to without collapsing is known as the angle of repose, or critical angle of repose, of a granular material. The materials on the slope face is almost ready to slide at this angle.

The design of particle material processing, storing, and conveying systems must take the angle of repose under consideration. The angle of repose is low when the grains are spherical and smooth. Its angle of repose is steep for extremely fine and adhesive materials.

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Answer:

it is d all of the above your welcome

Start with all three light sources on and no object to cast a shadow. Yellow the color be in the region that was originally illuminated by all three sources.

Shadows are sharper while the light source is severe and focussed. The attitude at which a mild moves an item additionally influences the scale and form of its shadow.

If an opaque object receives in the manner, it stops light rays from traveling via it. This results in a place of darkness performing at the back of the item. The dark place is called a shadow. the scale and form of a shadow rely upon the placement and size of the mild source as compared to the object.

Light travels in a instantly line from its source. while light reaches an opaque object, the light is avoided from transferring thru the object, leaving a place of darkness on the opposite side.

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The cost of using the device for 24.0 hours with a 14.0 A current and an 8.00 Ω resistance is $0.2420.

To calculate the cost of the energy used, we need to find the total energy consumed and then multiply it by the cost per kilowatt-hour (kW∙h).

First, let's find the total energy consumed by multiplying the current (14.0 A) by the device's resistance (8.00 Ω) and the time (24.0 hours):

Energy = Current × Resistance × Time

Energy = 14.0 A × 8.00 Ω × 24.0 hours

Energy = 2688 A∙Ω∙hours

Since the unit of energy is in ampere-ohms-hours, we need to convert it to kilowatt-hours (kW∙h) before calculating the cost.

To convert ampere-ohms-hours to kilowatt-hours, we divide the energy by 1000 (1 kilowatt = 1000 watts):

Energy in kW∙h = Energy in A∙Ω∙hours ÷ 1000

Energy in kW∙h = 2688 A∙Ω∙hours ÷ 1000

Energy in kW∙h = 2.688 kW∙h

Now, we can calculate the cost by multiplying the energy in kilowatt-hours (2.688 kW∙h) by the cost per kilowatt-hour ($0.0900):

Cost = Energy in kW∙h × Cost per kW∙h

Cost = 2.688 kW∙h × $0.0900

Cost = $0.2420

So, the cost of using the device for 24.0 hours with a 14.0 A current and an 8.00 Ω resistance is $0.2420.

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Answer:

C should be the correct answer,

Explanation:

The gas which produce heat in the atmosphere as it is increased is called a greenhouse gas.  Gases like argon , nitrogen, and Oxygen etc. is not a greenhouse gas. Since O3 is not a greenhouse gas it cannot produce heat in the atmosphere .

Hope you understand,

Answer: I put the importance of the lab in the topic is to find how dense an object is and if it can sink or float and it's important to answer the question so you can also find mass and volume.

Explanation: I dunno haha...