A small cube of metal measures 16.8 mm on a side and weighs 35.9 g.what is the density of the metal in g/cm3?

The sounds emitting from Ross' car can be characterized as low frequency, high amplitude.

The question states that pedestrians often stare at Ross' car due to the loud, low-pitched booming sound they hear. From this description, we can infer certain characteristics of the sound.

Low frequency refers to sounds with a lower pitch, such as deep bass notes. These low-pitched sounds are associated with lower frequencies on the sound spectrum.

High amplitude refers to the intensity or loudness of the sound. When a sound is described as loud, it indicates a high amplitude or a greater magnitude of sound waves.

Therefore, the sounds emitting from Ross' car can be characterized as low frequency (low-pitched) and high amplitude (loud). This combination of characteristics results in the loud, low-pitched booming sound that draws the attention of pedestrians.

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Answer:

down below

Explanation:

I assume you're asking about it's orbit around the sun. I believe the Earth's orbit around the sun would be shorter. If the Earth sped up, one can assume that means the days are shorter and the rate at which the Earth orbits the sun would also speed up.

This sounds like an open ended question, so I don't think there can be a wrong answer.

Hope this helps! :)

Answer:

1. Beryllium

2. 4

3. 9

4. 0

Explanation:

• The element shown in the image is beryllium because the atom shown contains four protons and the only element with four protons is beryllium.

• The atom's atomic number is 4, because atomic number is the number of protons of an element, and the atom shown contains 4 protons.

• The mass number of the atom is 9. Mass number is the sum of the number of protons and neutrons in the nucleus of an atom, and the atom shown contains 4 protons and 5 neutrons; therefore its mass number is (4 + 5 =) 9.

• The charge of the atom is 0. This is because it has 4 protons which give it a +4 charge, but it also has 4 electrons which give it a -4 charge. Therefore its net charge is: 4 + (-4) = 0.

The semicircular canals are specialized to assess rotational acceleration of the head, while the otolith organs are specialized to detect linear acceleration and static position of the head relative to the gravitational axis. The semicircular canals contain fluid-filled channels arranged in three perpendicular planes, allowing them to detect angular movements of the head. On the other hand, the otolith organs consist of small calcium carbonate crystals suspended in gelatinous fluid, which respond to linear accelerations and changes in head position relative to gravity.

The semicircular canals are responsible for detecting rotational acceleration of the head. They are three fluid-filled canals positioned in different planes: the horizontal canal, anterior (superior) canal, and posterior (inferior) canal. Each canal has a bulge at one end called the ampulla, which contains hair cells that detect fluid movement. When the head rotates, the fluid within the canals also moves, bending the hair cells and signaling the brain about the rotational acceleration.

The otolith organs, consisting of the utricle and saccule, are specialized in detecting linear acceleration and static position of the head relative to the gravitational axis. These organs contain small calcium carbonate crystals called otoliths that are embedded in a gelatinous layer. When the head accelerates linearly or changes position relative to gravity, the otoliths move, causing the gelatinous layer to shift and stimulating the hair cells. This signals the brain about changes in linear acceleration and head position, including tilting or linear movements such as walking or riding in a vehicle.

In summary, the semicircular canals are designed to detect rotational acceleration, while the otolith organs are specialized in detecting linear acceleration and static position changes of the head relative to the gravitational axis. This division of sensory functions allows for a comprehensive assessment of different types of head movements and orientations in space.

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Answer:

U = 18,785 J

Explanation:

Elastic Energy

Elastic energy is energy stored in an object due to a force that temporarily changes its shape, such as shrinking or stretching.

The elastic energy can be calculated as follows:

\(\displaystyle U=\frac{1}{2}k(\Delta x)^2\)

Where k is the spring constant, and \Delta x is the change in the size of the spring.

The bungee cord stretches \Delta x =17 m, and k=130 N/m, thus:

\(\displaystyle U=\frac{1}{2}130(17)^2\)

U = 18,785 J

Mass of copper block, m = 8.96 g

Constant molar heat capacity of copper, c1 = 24.44 J K⁻¹ mol⁻¹

Initial temperature of copper block, T1 = 85°C

Mass of water, M = 125 g

Constant molar heat capacity of water, c2 = 75.29 J K⁻¹ mol⁻¹

Initial temperature of water, T2 = 25°C

Heat is transferred from the copper block to the water until both reach a common temperature, T. We are to find the change in entropy for each process using the following formula:

Change in entropy, ΔS = Q / T

where Q is the amount of heat transferred and T is the common temperature of the system. Since the process is reversible, we can also write this as:

ΔS = ∫ dQ / T

Change in entropy of copper block:

The amount of heat transferred from the copper block to the water, Q1 = mc1ΔT = (8.96/63.546) × 24.44 × (T - 85) J/K

where ΔT = T - T1 is the change in temperature.

Using the formula for change in entropy:

ΔS1 = Q1 / T = (8.96/63.546) × 24.44 × (T - 85) / T J/K

Change in entropy of water:

The amount of heat transferred from the copper block to the water is the same as the amount of heat gained by the water, Q2. So,

Q2 = -Q1 = -(8.96/63.546) × 24.44 × (T - 85) J

Using the formula for change in entropy:

ΔS2 = Q2 / T = -(8.96/63.546) × 24.44 × (T - 85) / T J/K

Therefore, the change in entropy for the copper block is given by:

ΔS1 = (8.96/63.546) × 24.44 × (T - 85) / T J/K

And the change in entropy for water is given by:

ΔS2 = -(8.96/63.546) × 24.44 × (T - 85) / T J/K

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Approximately 33.1 degrees is the maximum angle of displacement of the swinging pendulum.

The maximum angle of displacement of the swinging pendulum can be determined using the principle of conservation of energy. When the student kicks the bob, the pendulum gains kinetic energy, which is then converted into potential energy as it swings upwards. At the highest point of its swing, all of the kinetic energy is converted into potential energy, and the pendulum comes to a momentary stop before swinging back down.

The potential energy of the pendulum at its highest point can be calculated as the product of its mass, acceleration due to gravity (9.81 m/s²), and the height it rises to. The height can be determined using the initial horizontal velocity imparted by the kick, which can be calculated using the force applied and the distance over which it acts. Assuming the pendulum swings upwards in a straight line, the height can be calculated using basic trigonometry.

The maximum angle of displacement can then be determined using the equation for the potential energy of a pendulum, which is proportional to the square of the sine of the angle of displacement from the equilibrium position. Solving for the angle, we get:

θ = arcsin(√(2gh)/l)

where h is the height the pendulum rises to, l is the length of the pendulum, and g is the acceleration due to gravity.

Substituting in the values given, we get:

h = (30 N)(sin(θ))(1 m)/(5.0 kg)(9.81 m/s²)
h ≈ 0.613 m

θ = arcsin(√(2(9.81 m/s²)(0.613 m))/l)

Assuming a standard length of 1.0 m for the pendulum, we get:

θ ≈ 0.577 radians or 33.1 degrees

Therefore, the maximum angle of displacement of the swinging pendulum is approximately 33.1 degrees.

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The momentum of the bike is 41kgm/s (option A).

Momentum is the tendency of a body to maintain its inertial motion i.e. the product of its mass and velocity, or the vector sum of the products of its masses and velocities.

The momentum of an object can be calculated by multiplying the mass of the object by its velocity.

According to this question, a child with a mass of 25 kg is riding a bike with a mass of 6.3 kg with a velocity of 6.5 m/s.

Momentum of the bike = 6.3kg × 6.5m/s = 40.95kgm/s

Therefore, 41kgm/s is the momentum of the bike.

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The question addresses the stability of the atmosphere and the factors that determine convective stability or instability. It also explains the difference between the adiabatic lapse rate of dry air and wet saturated air.

a) The stability of the atmosphere is determined by the temperature profile and relative densities of the air cell and atmosphere. If the temperature of the surrounding atmosphere decreases with altitude at a rate greater than the adiabatic lapse rate of the air cell, the atmosphere is considered convectively stable.

In this case, the air cell will return to its original position. Conversely, if the temperature of the surrounding atmosphere decreases slower than the adiabatic lapse rate of the air cell, the atmosphere is convectively unstable. The air cell will continue moving in the same direction.

b) The adiabatic lapse rate refers to the rate at which temperature decreases with altitude for a parcel of air lifted or descending adiabatically (without exchanging heat with its surroundings). The adiabatic lapse rate of dry air is higher (around \(9.8^0C\) per kilometer) compared to the adiabatic lapse rate of wet saturated air (around 5°C per kilometer).

This difference arises because when water vapor condenses during the ascent of saturated air, latent heat is released, reducing the rate of temperature decrease. A diagram can illustrate the difference between the two lapse rates, showcasing their respective slopes.

c) When wet unsaturated air rises from the ocean surface, its temperature decreases at a rate equal to the dry adiabatic lapse rate. However, if the ambient lapse rate (temperature decrease with altitude) is higher than the adiabatic lapse rate for dry air, a temperature inversion layer forms at higher altitudes.

In this inversion layer, the temperature increases with altitude instead of decreasing. A schematic diagram can depict the temperature changes of the wet air in comparison to the ambient temperature, showing the inversion layer.

Cumulus clouds form at the altitude where the rising moist air reaches the level of the temperature inversion layer. These clouds are formed due to the condensation of water vapor as the air parcel cools to its dew point temperature.

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Assuming each concrete span is half the length of the bridge, so 195 m

ΔL = αLΔT,

where,

ΔL: change in length

α: coeff. of thermal expansion

L: current original length

ΔT: change in temperature

We need to look at each span individually.

Let's fill in the variables we know:

L = 195 m

α = 1.2*10^-5 /C

ΔT = 20 C

ΔL = (1.2*10^-5)(195)(20)

ΔL = 0.0468 m, this is how much each span expands.

Now, we can form a triangle with the original length of each span, the new length of each span, and the rise due to buckling.

L0 = 195

Ln = 195 + 0.0468 = 195.0468

Now that we have two of the three sides of the triangle, we can solve for the last side, h.

Pythagorean theorem:

195^2 + h^2 = 195.0468^2

Solving for h,

h = 4.272 m

[A] Acidic in nature:-

[B] Basic in nature:-

Explanation:

a) The solutions can be classified as basic or acidic depending on their hydrogen ion concentration relative to pure water. If the value of pH is below seven, then the solution is acidic and if the pH is greater than seven then the solution is said to be basic.

b) Basic in nature means when a substance is soapy and bitter in taste and when a subtance changes red litmus blue. This nature of substance is basic.

For a Rectangular plate has a voltage of +180V and a 'voltage of -5V. , the second plate has the Electric field mathematically given as

E=21.5*10^3v/m

Generally, the equation for the Electric field   is mathematically given as

E=v/d

Where

v={180-(-5)}v

v=185v

Therefore

E=185/8.6*10^{-3}

E=21.5*10^3v/m

In conclusion, Electric field

E=21.5*10^3v/m

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The commutator reverses the flow of current in an electric motor.

In an electric motor, the commutator plays a crucial role in reversing the direction of the current flowing through the motor's coils. The commutator is a segmented metal ring that is typically made of copper or a copper alloy. It is mounted on the rotor or armature shaft of the motor.

As the rotor spins within the motor's magnetic field, the commutator brushes, which are usually made of carbon or graphite, maintain contact with the segments of the commutator. These brushes provide the electrical connection between the motor's power supply and the rotating coils on the armature.

The commutator segments are arranged in such a way that they ensure the current flow through the motor's coils is reversed at the appropriate moments. This reversal of current direction in the coils creates a changing magnetic field, which interacts with the fixed magnetic field of the motor, resulting in the rotation of the rotor.

By reversing the flow of current in the coils, the commutator allows the motor to continuously rotate in a single direction. Without the commutator's function of reversing the current, the motor would not be able to generate continuous rotational motion.

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Answer:

The commutator reverses the flow of current in an electric motor.

Explanation:

I got it right

Dielectrics are substances that prevent the flow of current.

They are most frequently used for energy storage in capacitors and to build radio frequency transmission lines because of their capacity to store charges. To enhance the performance of semiconductors, high-permittivity dielectric materials are frequently utilised.

They are most frequently used for energy storage in capacitors and to build radio frequency transmission lines because of their capacity to store charges.

To enhance the performance of semiconductors, high-permittivity dielectric materials are frequently utilised. a material that is dielectric, insulating, or an extremely bad conductor of electrical current. A substance that is an electrical insulator is known as a dielectric material.

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In order to reach the maximum height of 2 meters, Kangaroo should jump with an initial speed of 6.26 m/s.

The three equations of motion are -

first law → v = u +at

second law → S = ut + 1/2 at²

Third law → v² - u² = 2aS

Given is a kangaroo who jumped 2 meters high.

Assume that the kangaroo jumped with an initial velocity of 'u' m/s.

The maximum height achieved is 2 meters.

Acceleration due to gravity will be -9.8 m/s²

At maximum height, the velocity will be zero. Therefore, the final velocity 'v' will be zero. Using third law →

v² - u² = 2aS

- u² = - 2gS  

u² = 2gS

u² = 2 x 9.8 x 2

u² = 39.2

u = 6.26 m/s

Therefore, in order to reach the maximum height of 2 meters, Kangaroo should jump with an initial speed of 6.26 m/s.

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Explanation:

Hey there!

The answer is Speed.

Reason:

Simply we know that distance (d) = speed*time

and speed = distance/ time. And according to the question, when a body covers certain distance/unit time, it's speed.

Hope it helps!

In order to chill a 750mL bottle of champagne using a bucket of ice at 0 degrees Celsius, approximately 249 grams of ice must melt. The specific heat capacity of ice is approximately 2.09 J/g°C.

To determine the amount of ice that needs to melt, we can use the principles of thermodynamics. First, we need to calculate the heat lost by the champagne and the heat gained by the melting ice. The heat lost by the champagne can be calculated using the equation Q = mcΔT, where Q is the heat lost, m is the mass of the champagne, c is the specific heat capacity of champagne, and ΔT is the change in temperature. Similarly, the heat gained by the ice can be calculated using the same equation, where m is the mass of the ice and c is the specific heat capacity of ice.

Given that the initial temperature of the champagne is 25 degrees Celsius and the final temperature is 8 degrees Celsius, ΔT for the champagne is 25 - 8 = 17 degrees Celsius. The specific heat capacity of champagne is approximately the same as water, which is 4.18 J/g°C. Therefore, the heat lost by the champagne is Q = (750g)(4.18 J/g°C)(17°C) = 53,595 J.

Since the ice is at 0 degrees Celsius, ΔT for the ice is 0 - (-8) = 8 degrees Celsius. The specific heat capacity of ice is approximately 2.09 J/g°C. Therefore, the heat gained by the ice is equal to the heat lost by the champagne, which is 53,595 J. Using the equation Q = mcΔT and solving for the mass of ice (m), we can rearrange the equation to m = Q / (cΔT). Plugging in the values, we get m = 53,595 J / (2.09 J/g°C * 8°C) ≈ 249 grams.

Therefore, approximately 249 grams of ice must melt in order to chill the champagne from 25 degrees Celsius to 8 degrees Celsius in a bucket of ice at 0 degrees Celsius.

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Answer:

Explanation:

6

Probability for X<20 for given probability distribution is 0.85.

Probability is concern with possibility. It is a branch of statistics which deals with the occurrence of a random event. Sum of probabilities for a particular event is one.  Probability has been introduced in statistics to predict how likely events are to happen. Probability means an extent to which something is likely to happen. To find the probability of a particular event to occur, firstly we must know the total number of possible outcomes. The distribution of probability for an event is called as probability distribution.

for example when a coin is tossed, it gives two possible outcomes Head and Tail. There is 50% of chance of getting Head or tail.

The Total probability is the sum of all the probabilities and it is always one.

In this problem Probability that x < 20,

P(x<20) = P(x<-10)+P(x<-5)+P(x<0)+P(x<5)+P(x<10)+P(x<15)

P(x<20) = 0.20+0.15+0.05+0.1+0.25+0.1 = 0.85

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To make the study blind, the researchers should randomly assign participants to two groups: one wearing the magnetic bracelet and the other wearing a placebo bracelet without magnetic properties. In a double-blind study, both the participants and the researchers measuring motion sickness should be unaware of which bracelet each participant is wearing.

In a blind study, the researchers aim to eliminate bias by preventing participants from knowing whether they are receiving the actual treatment or a placebo. To achieve this, the research team should randomly assign participants to two groups. One group will wear the magnetic bracelet, while the other group will wear a placebo bracelet that looks identical but lacks any magnetic properties. The participants should not be informed about the nature of the bracelets to ensure unbiased results.

To conduct a double-blind study, both the participants and the researchers who are assessing motion sickness levels need to be unaware of which bracelet each participant is wearing.

This additional measure prevents the researchers from inadvertently influencing the outcome by treating participants differently based on their bracelet assignment. By keeping both the participants and the researchers blind to the bracelet conditions, the study can minimize bias and ensure more reliable results.

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Answer:

In static friction, the frictional force resists force that is applied to an object, and the object remains at rest until the force of static friction is overcome. In kinetic friction, the frictional force resists the motion of an object. For the case of a brick…

Answer:

one which is closer to the star

Answer:

A is your answer

Explanation:

mark brainleist plz

A small piece of play-doh (modeling clay) is thrown at a wall. The collision is perfectly inelastic.

Collision:

When two objects come into direct contact, a collision happens.

It is the occurrence where two or more bodies exert forces on one another within a reasonably short period of time.

There are two types of collision:

elastic collision :

An elastic collision is one in which the system does not experience a net loss of kinetic energy as a result of the collision.

Inelastic collision :

In a collision that is classified as inelastic, kinetic energy is lost. Thermal energy, sound energy, and material deformation are created from the kinetic energy lost.

A small piece of play-doh (modeling clay) is thrown at a wall. The collision is perfectly inelastic.

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By dividing the distance the dog travels by the time needed to complete that distance, the speed of the dog may be determined. Hence, the dog travels at a pace of 5.00 metres per second.

Greyhounds, which were developed as hunting dogs, are often regarded as the quickest dog breed. Dog racing has utilised greyhounds for many years. Given their enormous level of energy, it is not surprising that their legs are capable of carrying them at a speed of up to 45 mph.

The distance in this instance is the park's width, or 80.0 metres, and the time is 16.0 seconds.

Hence, the dog's speed is:

speed = distance / time

speed = 80.0 meters / 16.0 seconds

speed = 5.00 meters/second

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Answer:

Train Bike Truck

Explanation:

The difference between colloid and emulsion is that a colloid can form when any state of matter (solid, liquid or gas) combine with a liquid whereas an emulsion has two liquid components which are immiscible with each other.

Answer:

wrthfnhdghkyulyf

Explanation:

zdfhdfhghdhddddddddddddddddddddd

Answer:

mass energy

Explanation:

because of the kinetic energy

Answer:

twice as much work

Explanation:

Answer:

im pretty sure its d

Explanation: