(c) The man lifts his suitcase.
The increase in gravitational potential energy of the suitcase is 264 J.
The mass of the suitcase is 12 kg.
Calculate the vertical height the suitcase is raised.
(gravitational field strength, g = 10 N/kg)
Use the equation:
change in
gravitational
nslą juoy ritiw qlent of magsib s web Vem UOY
or
potential energy = mass x g x change in vertical height
gwoq ort
enqma bns elsluolso of beay ed nso ezerli word bns exist bluorie atnabuta arit atramenvasen terw ns19
12+10+
boritem emsa edt eau taum zaslo aloriw ariT
atripiew pniau boritem s 10 aqeta gniau bortiem & eau veriferijeriw ablaeb faum aslo od
22slo ertt ni inebuta rose to tugtuo 1ewoq eril etapilzevni etnobute to zaslo A
anoitaeu
(e)
(2)
height raised =
m
(Total for question = 4 marks)

The speed of sound in water made by a torpedo with a speed of 20.00m/s and explodes upon impact with a target 2000.0m away is 19.72 m / s

v = d / t

v = Velocity

d = Distance

t = Time

d = 2000 m

t = 101.4 s

v = 2000 / 101.4

v = 19.72 m / s

Velocity of an object is the object's rate of change of position with respect to time. It is mostly denoted as m / s.

Therefore, the speed of sound in water is 19.72 m / s

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The statement that best describes how energy is conserved in this scenario is that the cold air absorbed energy from the water vapor, so it condensed and formed steam and the liquid water absorbed the energy of the fire, so it changed into a gas and evaporated. That is option B and D respectively.

The law of conservation of energy states that energy is neither created nor destroyed but can be changed from one form to another.

At the camping, energy from a lighter is being transferred to the wood and is being sustained by the chemical energy in the wood.

Upon the use of water to extinguish the fire, the liquid water absorbed the energy of the fire, so it changed into a gas and evaporated.

Also around the fire is the cold air which can absorb heat to form steam after condensation.

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The de Broglie wavelength for a particle== 0.92 ×10⁻³⁴m.

de broglie wavelength is the wavelength associated with particle of mass m moving with velocity v.

p= h/ λ

where, p -is  the momentum of the atom;

h- Planck's constant - 6.626×10⁻³⁴ m²kg s⁻¹

λ- wavelength;

Momentum can be expressed as

p=m×v

where , m is  the mass of the particle;

v - the speed of the particle.

so,

λ = h/(m×v)

= ( 6.626×10⁻³⁴ m²kg s⁻¹)/(1.2kg × 6.0 m/s)

= (6.626×10⁻³⁴ m²kg s⁻¹)/7.2

= 0.92 ×10⁻³⁴ m

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To answer the question effectively, Jacob should use trail and error as a method. When doing so, he should be reducing the number of cars loaded in the train one after the other until he successfully make the train pull up the remaining cars.

For Jacob to answer this question and to find the number of cars that the train can pull up the hill, he should use a method know as trial and error. With the method, Jacob would want to decrease the number of cars loaded in the train one after the other, and should be pulling the train up after every trail.

The number of cars loaded in the train can be decreased by one for each case Jacob makes an attempt up to the time he successfully make the train pull up the hill.

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Doing pull ups and when have a pause at up , there is almost entire body weight just except the weight of the hands.

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Answer: The force of gravity depends directly upon the masses of the two objects, and inversely on the square of the distance between them. This means that the force of gravity increases with mass, but decreases with increasing distance between objects.

Explanation: Hope this helps. : )

The total displacement is 3.58 kilometers to the south of the east. An object's total change in position is referred to as displacement, a vector variable that measures "how far out of place an object is."

A scalar quantity known as distance measures "how much ground an object has traversed" while moving. An object's total change in position is referred to as displacement, a vector variable that measures "how far out of place an object is. These factors provide the overall displacement: where,

The average speed is v.

Time has come.

The typical speed is:

v = 3.53 m/s

While the time must be changed from minutes to seconds:

t=169*60

=10140s.

Consequently, the displacement's size is

=3.53*10140

=35794 m

=3.58 km

Furthermore, since the direction and speed are identical, the direction is 45° south of east.

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Answer:

Voltmeter

Explanation:

Voltmeter is used to measure both terminal potential difference as well as electromotive force (e.m.f.) depending upon the connection state of the battery or cell.

Instantaneous velocity and Average acceleration are vectors. Hence, the correct options are (I) and (II).

The instantaneous velocity is a quantity that shows us how quickly an object is moving at any point along its path. The time between the two events approaches zero when the average velocity between two points on the path reaches a certain limit. Instantaneous velocity is a vector with a dimension of length per time, similar to average velocity.

The rate at which the velocity changes is known as the average acceleration vector. It moves in the direction of the velocity change, v. The rate at which a velocity is changing over time is called acceleration. Acceleration is also a vector quantity and must take into account changes in both the magnitude and direction of a velocity. Because velocity has both magnitude and direction, it is referred to as a vector quantity.

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According to Newton's Second Law, an object's net force is equal to the product of its mass and acceleration.

Force (F) can be computed from the 2nd Law of Motion using the following formula:

Fnet = ma( Equation 1 )

due to the fact that the problem did not specify it. We'll suppose the plane is flying straight up.

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Actual specific heat capacity would be less than the computed experimental specific heat capacity.

The experiment's measurement of water's specific heat capacity, c, is higher than the accepted value for c. This is because some heat was lost to the surroundings, causing the experimental temperature rise to be q smaller than the projected temperature rise.

The quantity of heat energy needed to raise the temperature of 1 kg of a material by 1 K is measured as specific heat capacity. It is crucial because it will show how much energy will be needed to raise or lower an object's temperature by a certain amount for a certain mass.

In this experiment, the primary source of error is heat loss by conduction. The conservation of energy serves as the theoretical foundation for this particular heat test. Energy can be in the form of heat, and in this instance, heat will be transported from the sample to the water.

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In light of this, V=V 0 loge (r/r 0 ) Field E= dr dV =V 0(r0r) eE= r mV2 alternatively, reV0r0=rmV2. V=(m eV 0 r 0 ) \ s1 / 2mV=(m e V 0 r 0 ) 1/2 = constant mvr= 2 nh, also known as Bohr's quantum condition or Hermitian matrix.

Show that the eigenfunctions for the Hermitian matrix in review exercise 3a can be normalized and that they are orthogonal.  

Demonstrate how the pair of degenerate eigenvalues for the Hermitian matrix in review exercise 3b can be made to have orthonormal eigenfunctions.

Under the given Hermitian matrix, "border conditions," solve the following second order linear differential equation: d2x/ dt2 + k2x(t) = 0 where x(t=0) = L and dx(t=0)/ dt = 0.

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Answer:

Omnivores generally occupy the third trophic level alongside meat-eating carnivores. Omnivores are a diverse group of animals.

Explanation:

Examples of omnivores include bears, birds, dogs, raccoons, foxes, certain insects, and even humans.

Crest is the part of the wave which does this.

A sound wave is the sample of disturbance resulting from the movement of strength visiting through a medium, including air, water or every other liquid or stable remember as it propagates far from the supply of the sound.

The sound waves are generated by a sound source, such as the vibrating diaphragm of a stereo speaker. The sound source creates vibrations in the surrounding medium. because the supply continues to vibrate the medium, the vibrations propagate far from the supply at the rate of sound, hence forming the sound wave.

A sound wave is not a transverse wave with crests and troughs, however alternatively a longitudinal wave with compressions and rarefactions.

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Answer:

D is the correct answer

Explanation:

Helium-filled balloons rise in the air because the density of helium is less than the density of air.

Answer:

its c my brotha

because if the density decreases so will the mass less mass=less momentum

Answer: C

Explanation:pure substance is a single kind of matter that cannot be separated into other kinds of matter by any physical means

The correction should be made to Natasha's table is: Mixtures are substances that are not chemically combined.

When two or more separate chemical substances are combined without being chemically linked, the result is referred to as a mixture in chemistry. A mixture is the physically combined state of two or more distinct substances that can take the forms of solutions, suspensions, or colloids while retaining their identities.

Chemical components, such as elements and compounds, can be mechanically blended or mixed to create mixtures without causing any chemical bonding or other chemical change, preserving the unique chemical properties and makeup of each ingredient.

Physical qualities of a mixture, such as its melting point, may be different from those of its constituents even while there are no chemical changes to its constituents.

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What thermonic emissions and liquid vaporization have in common is that the particles involved both processes evaporates by the application of heat.

The amount of heat energy which is needed by just 1 gram of a liquid substance to boil without being affected by change in temperature.

However, when the thermal liquid of vaporization decreases as temperature increases. It is also affected by intermolecular forces.

Thermonic emissions refers to those electrons which are produced by the application of heat energy.

In conclusion, the major similarity in the task above is that they evaporated by heat.

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Answer:

Therefore machine efficiency is 131.6%.

Explanation:

Data

work output = 500J

work input = 380J

M.E = ?

M.E = work output/work input × 100%

M.E = 500J/380J × 100%

M.E = 131.6%

Therefore machine efficiency is 131.6%.

Answer:

There traits are= understanding,fast thinkers,reliable/trustworthy,

Answer:

An effective team is a one where the team members, including the patients, communicate with each other, as well as merging their observations, expertise and decision-making responsibilities to optimize patients

Answer:

K ≈ 1.10 × 10⁻¹⁸ J

Explanation:

Apply the Photoelectric Equation of Einstein:

h × f = K - W

Where:

h: Planck's constant = 6,62607015 × 10⁻³⁴ m². kg / s;

K: kinetic energy;

W: work function.

So:

h × f = K - W

6,63 × 10⁻³⁴ × 9.62 × 10¹⁴ = K - (2.90 × 1.6×10⁻¹⁹)

K = 6,63 × 10⁻³⁴ × 9.62 × 10¹⁴ + 2.90 × 1.6×10⁻¹⁹

K ≈ 1.10 × 10⁻¹⁸ J

Answer:

3.0 W

I actually had this question before BUT I have no clue how to explain it. I haven't done this in so long. I apologize but that is the correct answer.

Answer:3.0 W

Explanation:

P=VI

P= (6.0 V) (5.0 A)

P= 3.0 W

A Normal Force is a force applied in the direction perpendicular to the surface that the force is applied to. An example of this is putting pressure directly down on a table with your hand.

A Tension Force is a force applied in the opposite direction of the object the force is applied to. Tension Forces usually are applied by springs, ropes, and wires. An example of this is a wrecking ball hanging from a crane. There is a Tension Force on the wrecking ball holding it up in the air.

These forces are different from one another based on their directions that the forces are applied. Forces are vectors, so their magnitude is determined by the amount of force applied and their direction. Tension Force can be a Normal Force, but Normal Forces are not always Tension Forces.

Seconds later, the amplitude of its momentum, p2, is equal to p1 + (F * Delta t).

A characteristic of an object in motion that it possesses as a result of its mass and motion and which, generally speaking, equals the product of the object's mass and velocity: a feature of an object in motion that determines how long it will take to bring it to rest when subjected to a constant force.

When a certain force is applied for a certain amount of time, a mass's velocity changes.

The following equation expresses this:

Eq. 1: Mass * Force * Time (Final velocity – Initial velocity)

Mass times speed equals momentum.

Eq. 2: Mass * Change in momentum (Final velocity – Initial velocity)

Set Eq1 = Eq2

Force x Time Equals Momentum Change

Equation 3: Final momentum - Initial momentum = Force * time

a mass m particle traveling along the x axis

The particle is being affected by the net force F along the x axis.

A constant force is F.

Eq. 1: Mass * Force * Time (Final velocity – Initial velocity)

Delta t = m * = F (Final velocity – Initial velocity)

Equation 3: Final momentum - Initial momentum = Force * time

p2 = p1 + (F * Delta t) = p2 - p1

Seconds later, the amplitude of its momentum, p2, is equal to p1 + (F * Delta t).

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Answer: Substance 3 is liquid at room temperature

Explanation: The common room temperature is assumed to be 20-22°C, we need to find the substance that will be in liquid state in that temperature.

For Substance 1, the boiling point is -195.975°C, and hence at room temperature, it would be in vapor phase and all liquid would have turned to gas.

For Substance 2, the boiling point is 3.85°C, and hence at room temperature, it would be in vapor phase and all liquid would have turned to gas in this case too.

For Substance 3, the boiling point is 77.85°C, and melting point is -108.15°C, hence at room temperature, it would be in liquid state.

For Substance 4, the melting point itself is 1800°C, due to which at room temperature it would be in solid state.

The average force acting on the ball is biggest in the with the cement floor case 2 when in the collision the ball bounce back to half of its initial height.

It is asked that in which case the average net force on the ball is highest.

According to impulse-momentum theorem,

Impulse I = F.Δt

where, F is the net average force and Δt is the time of contact during the collision.

In the case of collision with the rubber piece the time of contact of the ball and the ball increases by large amount while in the case of cement floor the time of contact is very very less.

The change in momentum which is equal to the Impulse is also biggest in the case of cement floor because the transfer of kinetic energy of the ball in the case of cement floor will be almost immediate.

The Bigger change in momentum and the smaller time of contact makes the average force on the ball is biggest in the case of cement floor case.

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A. The tension in the string being twirled around Fred's head is 247 N.

The centripetal acceleration of the rock twirled around Fred's head is calculated as follows.

a = ω²r

where;

The angular velocity of the rock = 5 rev/s x 2π rad/rev = 10π rad/s = 31.42 rad/s

Substitute the value of the angular velocity and radius of the circular path and calculate the centripetal acceleration.

a = (31.42)² x (0.5)

a = 493.6 m/s²

The tension in the string = ma

                                         = (0.5 kg) x (493.6 m/s²)

                                          = 246.8 N ≈ 247 N

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The complete question is below:

A string tied to a rock is being twirled around Fred's head at 5 cycles/s . If the rock has a mass of 500 g and the string is 50 cm long, what is the tension in the string?

Car a is moving at va 60 km/h to the right with respect to the ground Car b is moving at vp 80 km/h to the right with respect to the ground. The Relative velocity of a car a with respect to car b is 20km/h .

rPS=→rPS′+→rS′S.r→PS=r→PS′+r→S′S.

The relative velocities are the time derivatives of the position vectors. Therefore,

→vPS=→vPS′+→vS′S.v→PS=v→PS′+v→S′S.

The velocity of a particle relative to S is equal to its velocity relative toS′S′plus the velocity ofS′S′relative to S.

We can extend (Figure) to any number of reference frames.

For particle P with velocities

→vPA,→vPB,and→vPCv→PA,v→PB,andv→PC in frames A, B, and C,

→vPC=→vPA+→vAB+→vBC.v→PC=v→PA+v→AB+v→BC.

We can also see how the accelerations are related as observed in two reference frames by differentiating

:→aPS=→aPS′+→aS′S.a→PS=a→PS′+a→S′S.We see that if the velocity of S′S′ relative to S is a constant,

then →aS′S=0a→S′S=0 and→aPS=→aPS′.a→PS=a→PS′.

This says the acceleration of a particle is the same as measured by two observers moving at a constant velocity relative to each other.

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The time period of simple pendulum is 2xpi x (l/g)^1/2  when derived by dimensional method.

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