PHYSICS HIGH SCHOOL

Kinetic energy varies jointly as the mass and the square of the velocity. A mass of 15 grams and velocity of 3 centimeters per second has a kinetic energy of 27 ergs. Find the kinetic energy for a mass of 5 grams and velocity of 9 centimeters per second.

Answers

Answer 1

Answer:

Answer:

Explanation:

Given

Kinetic energy varies jointly as mass and square of velocity

$K.E.\propto m$

$K.E.\propto v^2$

$K.E.=kmv^2$

for $m=15 gm\ and\ v=3 cm/s$

$K.E.=27 ergs$

$27=k(15)(3)^2 -----1$

for $m=5 gm, v=9 cm/s$

$K.E.=k(5)(9)^2----2$

Divide 1 & 2 we get

$(27)/(K.E.)=(15* 3^2)/(5* 9^2)$

$K.E.=81 ergs$

Answer 2

Answer:

Final answer:

Kinetic energy is proportional to mass and the square of velocity. It can be calculated for different masses and velocities using a constant derived from specific known values.

Explanation:

The principle of kinetic energy states that kinetic energy is directly proportional to mass and the square of velocity. Therefore, we can use the equation Kinetic Energy = 0.5 * Mass * Velocity^2 to calculate kinetic energy.

In this example, a mass of 15 grams and a velocity of 3 cm/s generates a kinetic energy of 27 ergs. By this equation, we derive a constant K. For a mass of 5 grams and a velocity of 9 cm/s, we can easily find the kinetic energy using this K value and multiplying it with the given mass and the square of the velocity.

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Related Questions

Which of the following statements are true as a block of ice melts?The temperature of the ice/water system increases.Heat energy enters the ice/water system.The temperature of the ice/water system remains constant.Heat energy leaves the ice/water system.The temperature of the ice/water system decreases.
The speed of sound is 330.0 m/s and the wave length of a particular sound wave is 33.0 meters. Calculate the frequency of the sound wave. A)11,000 Hz B)10.0 Hz C) 0.10 Hz D)9.1 x 10-5 Hz
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An atomic physicist determines that an atom is composed of 8 positively charged particles and has a mass of 15 amu. Which is the best conclusion that can be drawn?
Which is an example of potential energy? a swimmer kicking their legs a car driving on the road an arrow flying at a target a yo-yo in someone’s hand

An incandescent light bulb produces light when electrons flow through thea. air.
b. glass.
c. filament.
d. vacuum.

Answers

Electriccurrent passes through a filament of an incandescent bulb, thereby increasingit temperature. When current flows, it contains electrons through the filamentto produce light. The answer is c. Typically, incandescent light bulb consistsof a glass enclosure that contains tungsten filament. The glass enclosure containseither a vacuum or an inert gas that serves as the filament protection fromevaporating. Incandescent light bulbs contain a stem attached at to its base toallow the electrical contacts to run through the envelope without gas or airleaks

Answer:filament

Explanation:

A chlorine ion contains 17 protons, 18 neutrons, and 18 electrons. What is the net charge of the ion? A. -e B. 0 C. +e D. -18e

Answers

A chlorine ion contains 17 protons and 18 electrons, which gives it a net charge of -1 1234. Therefore, the correct answer is A. -e.

PLEASE HELP ME What does a moving charge experience when it is near a magnetic field? static friction gravity a stationary charge a force

Answers

A moving charge experiences a force as it moves close to a magnetic field present in a region.

Explanation:

A charged particle when moves near a magnetic field is forced to move in a circular path. If there is a straight moving charged particle enters the region of the magnetic field, it's path is changed from straight path to the curved path.

The motion of the charged path inside or near the magnetic field will be a circular path and this circular path is due to the force experienced by the charged particle in the magnetic field.

The force experienced by the a charged particle as it moves near the magnetic field is termed as the Lorentz force. The expression for the Lorentz force experienced by the charged particle in the magnetic field is given by:

$\boxed{F_m=Q(\overrightarrow{v}*\overrightarrow{B})}$

Here, $F_m$ is the magnetic force, $Q$ is the amount of charge, $\overrightarrow{v}$ is the velocity vector and $\overrightarrow{B}$ is the magnetic field intensity in the region.

Thus, A moving charge experiences a force as it moves close to a magnetic field present in a region.

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2. What is the current in resistor R2 brainly.com/question/3051098

3. Average current denisty of a linear wire brainly.com/question/10597501

Answer Details:

Grade: High School

Subject: Physics

Chapter: Electromagnetism

Keywords:

moving, charge, straight, circular, path, magnetic, field, amount, force, velocity, intensity, Lorentz, expression, stationary.

Final answer:

A moving charge experiences a force when it is near a magnetic field.

Explanation:

A moving charge experiences a force when it is near a magnetic field. This force is known as the magnetic force and is given by the equation F = qvBsinθ, where q is the charge, v is the velocity of the charge, B is the magnetic field strength, and θ is the angle between the velocity and the magnetic field. The direction of the force is perpendicular to both the velocity and the magnetic field.

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Why is freshly distilled or deionized water used in this standardization?

Answers

Answer:

The amount of carbon dioxide is little in deionized water.

Explanation:

Deionized water is a water with little or no impurities. Impurities are in waters are not able to boil below or above the boiling point of water,and in this case are been retained in the original container.

Answer:

There is little CO2 in freshly deionized or distilled water.

Explanation:

Freshly distilled water has no hydrogen peroxide. Distilled water contains calcium, which stabilizes the sodium hydroxide , Freshly deionized water has a pH of 4.72. There is little CO2 in freshly deionized or distilled water.

If an element forms a 3+ ion in which group of the periodic table would you expect to find it?A. 15
B. 5
C. 13
D. 2

Answers

If an element forms a 3+ ion, one can expect to find it in group 13 of the periodic table (option C).

What is the periodic table?

Periodic table is a tabular chart of the chemical elements according to their atomic numbers so that elements with similar properties are in the same group (column).

The periodic table is made up of vertical columns called group and horizontal rows called periods.

Elements in group 13 form ions with +3 and +1 charges. The elements are as follows:

boron (B)
aluminum (Al)
gallium (Ga)
indium (In)
thallium (Tl)
nihonium (Nh)

Therefore, group 13 elements in the periodictable form +³ ions.

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Problems with solar energy include _____. the inability of current technology to capture large amounts of the Sun's energy the inability of current technology to store captured solar energy inconsistencies in the availability of the resource lack of demand for solar energy

Answers

Problems with solar energy include the inability of current technology to capture the large amounts of the Sun's energy, the inability of current technology to store captured solar energy, and inconsistencies in the availability of the resource. Thus, the correct options are 1, 2, and 3.

What is the Solar energy?

Solar energy is the radiant light energy and the heat energy from the Sun which is harnessed using a wide range of technologies such as the solar power to generate electric energy, solar thermal energy, and the solar architecture.

Problems which are associated with the solar energy include the inability of current technology to capture the large amounts of the Sun's energy, the inability of current technology to store captured solar energy, and inconsistencies in the availability of the resource.

Therefore, the correct options are 1, 2, and 3.

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First choice: the inability of current technology to capture
large amounts of the Sun's energy

Well, it's true that large amounts of it get away ... our 'efficiency' at capturing it is still rather low. But the amount of free energy we're able to capture is still huge and significant, so this isn't really a major problem.

Second choice: the inability of current technology to store
captured solar energy

No. We're pretty good at building batteries to store small amounts, or raising water to store large amounts. Storage could be better and cheaper than it is, but we can store huge amounts of captured solar energy right now, so this isn't a major problem either.

Third choice: inconsistencies in the availability of the resource

I think this is it. If we come to depend on solar energy, then we're
expectedly out of luck at night, and we may unexpectedly be out
of luck during long periods of overcast skies.

Fourth choice: lack of demand for solar energy

If there is a lack of demand, it's purely a result of willful manipulation
of the market by those whose interests are hurt by solar energy.

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