The objects collide and then stick together. What is the change in kinetic energy of the two-object system from immediately before the collision to immediately after the collision

The sample of the solid in grams is 5.5g

HOW TO CALCULATE SPECIFIC HEAT CAPACITY:

Q = m × c × ∆T

Where;

Q = quantity of heat absorbed/released (cal)

m = mass of the substance (g)

c = specific heat (cal/g°C)

∆T = change in temperature (°C)

Q = 7.90Kcal = 7900cal

m = ?

c = 11.5 cal/g°C

T1 = 135K = 135K − 273.15 = -138.1°C

T2 = 260K = 260K − 273.15 = -13.15°C

∆T = -13.15 - (-138.1) = 124.95°C

m = Q ÷ c∆T

m = 7900 ÷ (11.5 × 124.95)

m = 7900 ÷ 1436.93

m = 5.5grams.

Therefore, the sample of the solid in grams is 5.5g.

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The work done by a force is the product of the component of the force applied to the body in the direction of displacement and the displacement. Firmly press the block "F" and the body will accelerate and move to complete the task.

K₁ + K₂ = work done

m₁ = 0.420 kg

m₂ = 0.850 kg

m = 0.350 kg

R₁ = 0.0200m

R₂ = 0.0300m

μ =  0.250

v₀ = 0.820 m/s

¹/₂(m₁ + m₂) (vₙ² - v₀²) + ¹/₂I(wₙ - w₀) = m₁gh - μm₂g

Since, I = ¹/₂m(R₁²+ R₂²) and w = v/R²

¹/₂(m₁ + m₂) (vₙ² - v₀²) + ¹/₂×¹/₂m(R₁²+ R₂²) (vₙ² - v₀²)/R₂² = m₁gh - μm₂g

Hence,

vₙ² = v₀² + (m₁gh - μm₂g) / (¹/₂(m₁ + m₂)+¹/₂(1+R₁²/R₂²)

vₙ² = 0.820 + (2.8 - 2.08) / (0.635 + 0.83)

vₙ² =  0.820 + 0.72/1.46

vₙ² =  0.820 + 0.49

vₙ = 1.41 m/s

Since, ω = v/r

where, ω = angular speed

ω = 1.41 /0.03

ω = 47 rad/sec

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The complete question as follows:

In the figure, the sliding block has a mass of 0.850 kg, the counterweight has a mass of 0.420 kg, and the pulley is a uniform solid cylinder with a mass of 0.350 kg and an outer radius of 0.0300 m and inner radius of 0.0200m. the coefficient of kinetic friction between the block and the horizontal surface is 0.250. the pulley turns without friction on its axle. the light cord does not stretch and does not slip on the pulley. the block has a velocity of 0.820 m/s toward the pulley when it passes through a photogate. (a) use energy methods to predict the speed of the block after it has moved to a second photogate 0.700 m away. (b) find the angular speed of the pulley at the same moment.

Answer:

Hetefrozygous, homofzygous

When a test charge is launched from point X with an initial speed v0 and later observed at point Y, the change in its speed depends on the electric field and forces acting upon it.

If the test charge experiences a net force in the direction of its motion, its speed at point Y will be greater than v0.

Conversely, if the net force opposes the motion, the speed will be less than v0. If no net force acts on the test charge, or if the force is perpendicular to its motion, its speed at point Y will be equal to v0.

To determine the exact change in speed, consider the specific electric field and forces involved.

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Answer:

i belive it is A Elliptical

Explanation:

please mark me brainliest

A cloud with all these characteristics needs a minimum mass of Mmin=2.4 MSun in order to create a star.

They are around 150 light-years across, comprise a large portion of the interstellar medium's mass, and have an average of 100 or 300 atoms per cubic centimeter with an interior temperature of just 7 to 15 K.Although many stars are also present, molecular clouds are primarily made of gas and dust.

Molecular clouds are quite cold at 10 K.Diffuse clouds are typically 100 K.HII zones have T 8000 K, depending just on abundances of the lanthanides that produce cooling radiation.

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Answer:

plagiarism

Explanation:

thats the answer because plagiarism means: the practice of taking someone else's work or ideas and passing them off as one's own.

Thats the definition!!!

lmk if this helped

Answer:phishing

Explanation:the definition of phishing is: the fraudulent practice of sending emails purporting to be from reputable companies in order to induce individuals to reveal personal information, such as passwords and credit card numbers.

Answer:

1. 4

2.0.625HZ

3.500

4. 428274940000000 or 4.2*10^14

5. 2

Explanation:

omnicalculator.com/physics/wavelength

Hi! Let's see.

Explanation:

Data:

==================================================================

We apply the distance formula:

We replace by the data:

It divides:

Answer: The distance is 15 meters.

Cordially Alejanndraax. Greetings!

The distance covered by the machine is 15 m.

Work done on an object is defined as the dot product of the force applied on the object and the displacement of the object.

Here,

Amount of work done by the machine, W = 12000 J

Force exerted on the machine, F = 800 N

The equation for work done,

W = F.s

Therefore, displacement,

s = W/F

s = 12000/800

s = 15 m

Hence,

The distance covered by the machine is 15 m.

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Answer:

I dont know sorryyyyyyy

Answer:

40

Explanation:

30

Answer: Periods

Explanation: The rows are called Periods

The columns are Groups

Periodic table

The size of the magnetic force on the wire due to the applied magnetic field of 0.55 T pointing straight down is 0.55 N (to two significant figures).

The magnetic force on a current-carrying wire is given by the equation F = I * L * B * sinθ, where F is the magnetic force, I is current, L is the length of the wire, B is the magnetic field, and θ is the angle between the current and the magnetic field.

In this case, the wire is carrying a current of 12 A (as given in the previous question), the length of the wire is 0.5 m (also given in the previous question), and the magnetic field is 0.55 T (given in the current question). Since the wire is perpendicular to the magnetic field, sinθ is equal to 1.

Plugging in these values into the equation, we get F = 12 * 0.5 * 0.55 * 1 = 0.55 N, rounded to two significant figures. Therefore, the size of the magnetic force on the wire due to the applied magnetic field is 0.55 N.

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When the earth wire is connected to the metal case of the washing machine, it provides an alternative pathway for electric current to flow if there is a fault, such as if the live wire touches the metal case. The earth wire is connected to the ground, which has zero potential, so any current that flows through the earth wire will not harm a person who touches the metal case. This is because the person's body is also at zero potential (ground potential) and there will be no potential difference (voltage) across the person's body, which means no electric current will flow through the person's body. Therefore, connecting the earth wire to the metal case of the washing machine ensures that any electrical faults will be safely conducted away from the person, reducing the risk of electric shock or electrocution.

The half-life of 40K is approximately 1.3 billion years. Given a ratio of 40Ar/40K as 3/1 in a granite sample, we can estimate the age of the sample by understanding the decay process.  Based on the given 40Ar/40K ratio, the age of the sample is approximately 650 million years.

Since the half-life of 40K is 1.3 billion years, this means that after each half-life, half of the 40K atoms will have decayed into 40Ar. Therefore, if the ratio of 40Ar/40K is 3/1, it suggests that three-quarters (or 75%) of the original 40K atoms have decayed into 40Ar.

To determine the age, we can calculate the number of half-lives that have occurred based on the remaining 25% of 40K. Since each half-life is 1.3 billion years, dividing the remaining 25% by 50% (half) gives us 0.5. Thus, the sample has undergone 0.5 half-lives.

Multiplying 0.5 by the half-life of 1.3 billion years gives us an estimated age of 0.65 billion years, or 650 million years, for the granite sample.

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On which planet would a 15.0 kg object weigh the most?The weight of an object is affected by its mass and the strength of gravity. On planets with a greater mass, the force of gravity is stronger than on those with a lower mass. Hence, the weight of an object is greater on planets with more mass, according to Newton's second law of motion.

The weight of a 15 kg object is the largest on the planet Jupiter because Jupiter has the highest mass among all the planets of our solar system. The answer is written below:Jupiter is the planet where a 15.0 kg object would weigh the most.Round the answer to the nearest whole numberOn Jupiter, the acceleration due to gravity is 24.79 m/s². The weight of an object on Jupiter is calculated using the formula:

F = m × gwhereF is the force of gravity (in newtons),m is the mass of the object (in kilograms), andg is the acceleration due to gravity (in meters per second squared).On Jupiter, the weight of a 15.0 kg object is:F = 15.0 kg × 24.79 m/s²= 371.85 N = 372 N (to the nearest whole number)Therefore, on Jupiter, a 15.0 kg object would weigh about 372 N.

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Answer:

The speed of sound in air is lower compared to in solids and liquids.

Explanation:

Sound is a wave that can be generated by a vibrating body. Its speed through different media differs due to the nature of the media.

Since the molecules of solids are closely packed, sound can be easily transferred from one molecule to another at a faster rate. Thus, the high speed of sound in solids.

In liquids, the molecules are not as closely packed as solids. So that  the speed of sound though liquids is lower compared to that of solids. Gases has its molecules farther apart, thus making the speed of sound through it the lowest compared to solids and liquids.

Therefore the sound of the batter hitting the ball is heard latter, due to its lower speed through the air.

Yes, PNS system causes more frequent depolarizations to the SA (Sinoatrial) node.

The PNS (Parasympathetic Nervous System) is responsible for decreasing the heart rate. It does so by releasing acetylcholine, which stimulates the M2 muscarinic receptors found in the SA node. When acetylcholine binds to M2 receptors, it opens potassium channels, leading to hyperpolarization of the SA node cells.As a result, the pacemaker potential threshold increases and requires more time to reach the threshold for depolarization, thus reducing the heart rate. Therefore, by decreasing the potassium ion permeability of the ECF, it slows the heart rate, resulting in fewer depolarizations in the SA node, causing a lower heart rate.

In summary, the parasympathetic nervous system (PNS) causes more frequent depolarizations to the SA node. The PNS slows down the heart rate, but this does not mean that the pacemaker potential is reduced. Instead, the pacemaker potential is hyperpolarized, increasing the threshold for depolarization. Thus, fewer action potentials reach the threshold, and heart rate is decreased. So, the decrease in potassium permeability in the ECF and an increase in the parasympathetic nervous system causes hyperpolarization of the SA node and increases the threshold for depolarization. This, in turn, leads to fewer depolarizations in the SA node, causing a slower heart rate.

Therefore, it can be concluded that the PNS system causes more frequent depolarizations to the SA node and decreases heart rate by increasing the threshold for depolarization, which is accomplished by hyperpolarizing the pacemaker potential.

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Answer:

yes

Explanation:

banked curve :

is a road that looks like the top part of a race track

its looks elevated

often seen in bicycle race track (velodrome)

Banking the curve can help keep cars from skidding. When the curve is banked, the centripetal force can be supplied by the horizontal component of the normal force.

sfuca

Observing galaxies at different distances provides valuable information about how galaxies existed in different periods of time. When we look at galaxies that are farther away, we are also looking back in time because the light from those galaxies took a long time to reach us. This allows us to study galaxies as they existed in the past.

By analyzing the properties of these distant galaxies, such as their size, shape, and composition, we can gain insights into the early stages of galaxy formation and evolution. For example, studying galaxies at different distances helps us understand how galaxies have grown and changed over billions of years.

Observations of galaxies at various distances also allow us to study the expansion of the universe. The light from distant galaxies can reveal information about the rate at which the universe has been expanding over time.

Overall, observing galaxies at different distances provides a glimpse into the past and helps us piece together the puzzle of how galaxies have evolved and shaped the universe as we know it today.

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Heya!!

For calculate aceleration, lets applicate second law of Newton:

                                                   \(\boxed{F=ma}\)

                                                 Δ   Being   Δ

                                             F = Force = 78,3 N

                                            m = Mass = 24,5 kg

                                             a = Aceleration = ?

⇒ Let's replace according the formula and clear "a":

\(\boxed{a=78,3\ N / 24,5\ kg}\)

⇒ Resolving

\(\boxed{a=3.19\ m/s^{2}}\)

Result:

The aceleration is 3,19 meters per second squared (m/s²)

Good Luck!!

The effective resistance of the Parallel circuit is 3 ohms.

option B.

In a parallel circuit, the sum of the currents through each path is equal to the total current that flows from the source.

The total resistance or effective resistance in a Parallel circuit with the following formula:

1/Rt = 1/R1 + 1/R2

where;

1/Rt = 1/4 + 1/12

1/Rt = (3 + 1 ) / 12

Rt = ( 12 ) / ( 4 )

Rt = 3 ohms

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Answer:

A

Explanation:

They drove 30km north. The displacement adds up to 25km therefore making the distance greater

Hope this helps!

The correct choices are: It is deflected by our magnetic field of the earth, protecting us. They create the auroras seen as the Northern and Southern Lights.

When solar wind, which consists of charged particles emitted by the Sun, reaches the Earth, two notable effects occur. Firstly, the Earth's magnetic field acts as a protective shield, deflecting the solar wind particles away from the planet's surface. This deflection helps protect the Earth's atmosphere and life from the harmful effects of direct exposure to the solar wind. Secondly, when the solar wind particles interact with the Earth's magnetic field, particularly in the polar regions, they can create stunning displays of light known as the auroras or Northern and Southern Lights. These colorful lights are generated when the charged particles from the solar wind collide with atoms and molecules in the upper atmosphere, causing them to emit light.

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Answer:

1. All electromagnetic waves travelS at 3×10⁸m/s in vacuum

2.They are transverse in nature.

3.they can travel through vacuum.( doesn't require any materials for their transmission.

4.They under go phenomena of diffraction,reflection, refraction, interference and polarization.

HOPE IT HELPED.

PLEASE PICK BRAINLIEST

a) Equivalent hydraulic diameter for a circular cross-section:

  Deq = 4 * Ac / P

(b) Equivalent hydraulic diameter for a square cross-section: Deq = a

(c) Equivalent hydraulic diameter for a rectangular cross-section:

Deq = 2 * (a * b) / (a + b)

d) Equivalent hydraulic diameter for an annular cross-section: Deq = D - d

a) In a circular cross-section, the equivalent hydraulic diameter (Deq) is defined as four times the cross-sectional area (Ac) divided by the perimeter (P). It represents a hypothetical diameter of a circular pipe that would have the same flow characteristics as the given non-circular cross-section.

b) In a square cross-section, the equivalent hydraulic diameter (Deq) is equal to the side length of the square. This simplification is possible because the flow characteristics in a square channel are similar in all directions.

c) In a rectangular cross-section, the equivalent hydraulic diameter (Deq) is given by two times the product of the width (a) and height (b) divided by their sum (a + b). This formula takes into account the dimensions of the rectangular channel to determine the equivalent diameter.

d)  In an annular cross-section, the equivalent hydraulic diameter (Deq) is equal to the difference between the outer diameter (D) and the inner diameter (d) of the annulus. This simplification assumes that the flow occurs only through the annular region.

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Answer:

it have to be a

Explanation:

The Taylorsville Volunteer Organization participating in the community is the subject of a key motion.

The motion of an object is the change in its position over time. It can be measured in speed, velocity, and acceleration. Speed is how fast an object is moving, velocity is speed in a particular direction, and acceleration is the rate of change of velocity. Motion can be linear, circular, or oscillatory. Linear motion is the movement of an object in a straight line, circular motion is the movement of an object in a circle, and oscillatory motion is the movement of an object back and forth. Motion can also be described in terms of forces like gravity, friction, and momentum.

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