Using the "Rube Goldberg" machine image below, identify the correct simple machine used in this complex machine.

Answer:

23.1mL

Explanation:

Given parameters:

Initial volume of the gas = 25ml

Initial pressure  = 740torr

Final pressure  = 800torr

Unknown:

Final volume  = ?

Solution:

To solve this problem, we apply Boyle's law which states that "the volume of a fixed mass of a gas varies inversely as the pressure changes if the temperature is constant"

         P₁ V₁   = P₂ V₂

P and V are pressure and volume

1 and 2 are initial and final states

       Insert the parameters and solve;

      740 x 25  = 800 x v₂

            v₂  = 23.1mL

Answer:

Sound waves move by vibrating objects and these objects vibrate other surrounding objects, carrying the sound along. The further away from the original source of a sound you are, the waves lessen until they don't have the strength to vibrate any other particles.

Explanation:

Answer:

1: The Ball Has 80,000 J

2: Their Potential Energy Is 934,083 J At That Point

3: They Would Have 203,200 Kinetic Energy

4: The Person Would Have More Potential Energy GoingUp A 1500 M Hill Rather Than Walking 1500 M On A Flat Surface Because When You Walk Up Something You Have More Potential Energy Then When You Walk On Flat Ground

Reason:

1: 100kg x 40 m/s = 80,000

2: 63.5 x 1500 M = 934,083

3: 63.5 x 80 M/s = 203,200

According to the graphic, the weighing balance has a hundredth-place level of uncertainty.

The characteristic of matter that gauges its resistance to acceleration in physics. An object's mass can be thought of as a rough count of its atoms.

Any tool that measures an object's mass or weight is referred to as a balance. Every laboratory needs balance as an essential tool.

In the hundredth position, there is uncertainty. There are always three significant figures for a mass that is between 1 gram and 9 grams when it is measured on this balance.

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Answer:

The greatest force of gravity on the ball will occur at the point when the ball is near to hit the ground

Explanation:

We know that the earth's center attracts everything towards its center with an acceleration of 9.8 m/s² so it simply means that the change in velocity must occur to produce acceleration. When the ball comes towards the earth, its speed  continuously increases and it is at maximum level when it is about to hit the ground so this is the point where gravitational force is maximum.

I hope this helps ^_^

Answer: Decomposition reaction.

Explanation:

Decomposition is a type of chemical reaction in which one reactant forms two or more than two products.

Decomposition reactions require breaking of bonds which require energy and thus all of the decomposition reactions are endothermic reactions. They require energy in the form of heat, electricity or sunlight and thus called as thermal, electrolytic and photolytic decomposition respectively.

The given reaction [tex]AB\rightarrow A+B[/tex] is a type of decpomposition reaction.

Answer.

Conduction

Convection

explanation.

Heat can travel from one place to another in three ways: Conduction, Convection and Radiation. Both conduction and convection require matter to transfer heat. If there is a temperature difference between two systems heat will always find a way to transfer from the higher to lower system.

Answer:

v = u +at

Explanation:

The equation that relates the final velocity and the average acceleration is written as follows :

v = u +at

Where

v is final velocity

u is initial velocity

a is acceleration

t is time

This equation is valid when the motion is with constant acceleration.

Answer:

2.52moles

Explanation:

The amount of substance, measured in miles, can be calculated using the formula:

Number of moles = mass ÷ molar mass

According to the information in this question; mass of Mercury (Hg) = 505g, molar mass (MM) of Hg = 200.59g/mol

Hence, using mole = mass/MM

mole = 505/200.59

mole = 2.5175

mole = 2.52moles

The resultant of the two forces is is 17 N.

We need to know about force resultant to solve this problem. The force resultant is the total net force applied to the object according to the direction. It can be written as

R = F1 + F2 + ... + Fn

where R is force resultant (net force)

From the question above, we know that

F1 = 7 N

F2 = 10 N

Because the direction is the same, the force will add to each other.

R = F1 + F2

R = 7 + 10

R = 17 N

Hence, the net force is 17 N

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Answer:

★ In a hypotonic solution, the solute concentration is lower than inside the cell. If the water continues to move into the cell, it can stretch the cell membrane to the point the cell bursts (lyses) and dies.

Explanation:

Hope you have a great day :)

Answer: D

Explanation:

Frank’s Furniture trains all of its employees to use computers is an example of an improvement in human capital.

Explanation:

The formula to determine the eccentricity of an ellipse is the distance between foci divided by the length of the major axis

Answer:

fossil c

Explanation:

Answer:

The ball will have a displacement of 0.5*15.0=7.5m after 0.5 seconds. The velocity of the ball will be 15.0 m/s, since it is not acted on by any forces except gravity (which acts in the direction opposite of the velocity).

Explanation:

We know this is the answer because, according to the kinematic equation:

v^2=u^2+2*a*d

0=15.0^2+2*(-9.8)*d

d=-7.5m

Answer:

D is the correct answer

Explanation:

A) shows low accuracy and high precision since they missed the bull's-eye but are all grouped together.      

B) Shows high accuracy and high precision

C) Shows high precision

D  is the only one that shows both low accuracy and low precision

The illustration represents low accuracy and low precision is according to option D.

When in an experiment, a value is measured 5 times, then if the values measured are same for most of the time or like three times out of five, it said to be accurate. The phenomenon is accuracy.

Precision is about comparing the values to each other then find them near to each other.

Accuracy compares the experimental value to the theoretical value.

So, when all the values are close to each other but not nearest to the theoretical value, then it is said to be precise but not accurate.

Thus, the correct option for low accuracy and precision is D.

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Answer:

C - empathy

Explanation:

Empathy is seeing a situation from someone else's point of view or putting yourself "in their shoes." Not sure how this one is physics but that's ok :)

Answer:

380.1 kg

Explanation:

The frequency of electromagnetic waves is 5.64 x 10¹⁴ Hz.

We need to know about electromagnetic waves to solve this problem. Electromagnetic waves can propagate without media. The speed of electromagnetic in vacuum media is equal to the speed of light. Hence, the wavelength and frequency can be determined as

c = λ . f

where c is the speed of light (3 x 10⁸ m/s), λ is wavelength and f is frequency.

From the question above, we know that

λ = 532 x 10¯⁹ m

By substituting the given parameter, we can calculate the frequency of green laser pointer

c = λ . f

f = c / λ

f = 3 x 10⁸ / 532x10¯⁹

f = 5.64 x 10¹⁴ Hz

Hence, the frequency is 5.64 x 10¹⁴ Hz.

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The calculated time taken is 10.7 hours

Given that our speed is 1 km/h and our width is 0.5 m, we can mow a path that is 0.5 m wide and 1000 m long in an hour, covering a total area of 1000 m * 0.5 m = 500 m2/hr.

Let's now determine the size of that football field.

5350.692864 m2 is equal to 360 ft / 3.281 ft/m plus 160 ft / 3.281 ft/m.

To determine how many hours it will take, divide that area by the 500 m2 that was previously determined.

500 m2/hour / 5350.692864 m2

= 10.70138573 hr

In other words, moving the football field would take around 10.7 hours.

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Answer:

People who may take this drug may have potential health risk because there is poor quality in that drug just because a drug doesn't exceed the weight limit doesn't mean quality doesn't matter quality matters just as much as the weight limit does  

Explanation:

Answer:

People who may take this drug may have potential health risk because there is poor quality in that drug just because a drug doesn't exceed the weight limit doesn't mean quality doesn't matter quality matters just as much as the weight limit does  

Explanation:

The main morphological types of galaxies are elliptical, spiral, and irregular.

Based on their morphology , galaxies have been classified into 3 types namely elliptical, spiral, and irregular.

These galaxies have various sizes and shapes ranging from dwarf galaxies to giant galaxies.

Elliptical Galaxy:

Spiral Galaxy:

Irregular Galaxy:

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The sports car moving at constant speed that travels 110 m in 5.4 s , then brakes and comes to a stop in a time of 3.7 s, have an acceleration of: -5 m/s²

The formula and procedure we will use to solve this exercise is:

Where:

Information about the problem:

Applying the velocity formula we get the (vi):

v = x/t

vi = 110 m / 5.4 s

vi = 20.37 m/s

Applying the acceleration formula we have:

a = (vf - vi) /t

a = (0 m/s - 20.37 m/s) /3.7 s

a = (-20.37 m/s) /3.7 s

a = -5 m/s²

It is a physical quantity that indicates the variation of velocity as a function of time, it is expressed in units of distance per time squared e.g.: m/sec2 ; km/h2

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Answer:

D. Dark fabric

Explanation:

A dark fabric would be the best and most desired material for designing the new home to absorbed energy from the sun.

Dark fabric is the material would be best for absorbing energy from electromagnetic waves.

This is defined as the ability or capacity to do work and is present in sources such as electromagnetic waves.

Dark surfaces absorb energy while lighter surfaces don't which is why option D was chosen as the most appropriate choice.

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Answer:

Kinetic

Explanation:

Its a moving action

When a bicyclist is pedaling up a hill, it is a form of potential energy. The correct option is option potential energy.

An object's position or configuration in relation to other things might provide it potential energy. The potential energy in this situation is gravitational potential energy.

Because they are being lifted against gravity as they ascend the hill, the cyclist gains gravitational potential energy. The potential energy of the cyclist increases as they ascend.

The potential energy will be transformed into kinetic energy once the cyclist begins pedaling or moving downward.

As a result of their increased height above the ground, cyclists are building up potential energy as they bike up a hill. They gain speed as they cycle downhill, transforming that potential energy into kinetic energy.

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The broglie wavelength is 9.27 x 10¯³⁵ meter.

We need to know about de Broglie's wavelength to solve this problem. Broglie's wave equation is the following :

λ = h / (m.v)

where λ is the wavelength, h is Max Planck constant 6.62x10⁻³⁴ J.s, m is the mass and v is velocity.

From the question above, we know that:

m = 231 gram = 0.231 kg

v = 34 m/s

By substituting the parameter, we get :

λ = h / (m.v)

λ = 6.62x10⁻³⁴ / (0.21 x 34)

λ = 9.27 x 10¯³⁵ m

Hence, the broglie wavelength is 9.27 x 10¯³⁵ meter.

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Answer:

13.33 m/s^2

Explanation:

Velocity^2 then divide that by the radius