explain why the different thermal conductivities of metal and plastic are important in the design of the bowl.

Answer:

the work done on the car by the applied force is 75 J.

Explanation:

Given;

initial velocity of the car, v = 4 m/s

applied force in opposite direction, F = 5N

initial position of the car, x₀ = 5 m

final position of the car, x₁ = 20 m

displacement of the car, Δx = x₁ - x₀ = 20 m - 5m

                                                            = 15 m

The work done on the car by the applied force is calculated as follows;

W = F.Δx

W = 5 x 15

W = 75 J

Therefore, the work done on the car by the applied force is 75 J.

Answer:

4.8 A

Explanation:

Voltage = current x resistance

(V = IR)

12 = I (0.5 +2)

I = 4.8 A

26.0898 rad/s is the angular velocity of a rotor in a blender.

Given

Initial velocity (ω₁) = 55.0 rad/s

Deceleration (α) = -40.7 rad/s²

Angle (θ) = 28.8 rad

Final angular velocity (ω₂) =?

According to the angular kinematic equation

ω₂² = ω₁² + 2αθ

Put the values of ω₁, α, and θ in the equation

We get,
ω₂² = (55)² + 2(₋40.7)(28.8)

ω₂² = √680.68

ω₂ = 26.0898 rad/s

Hence, 26.0898 rad/s is the angular velocity of a rotor in a blender after turning 28.8 rad.

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Explanation:

F=m(v-u)/t

F=2N

m=2kg

t=2s

2=2(v-u)/2

cross multiply

2*2=2(v-u)

4=2(v-u)

4/2=v-u

v-u=2m/s

v-u is the change is velocity.

The change in velocity of the body in 2 sec is 2m/s

According to Newton's second law which states that the change in momentum of an object is directly proportional to the applied force.

Mathematically:

\(F \ \alpha \ (\dfrac{v-u}{t} )\)

\(F = m (\dfrac{v-u}{t} )\)

where:

m is the mass

(v - u) is the change in velocity

t is the time

F is the applied force

Given the following:

mass m = 2kg

time t = 2secs

Force F = 2N

Required

Change in velocity (v-u)

Substitute the given parameters into the expression shown above:

\(2=2(\dfrac{v-u}{2})\\ 2 \times 2=2(v-u)\\4=2(v-u)\\v-u=\dfrac{4}{2}\\v-u=2m/s\\\)

Hence the change in velocity of the body in 2 sec is 2m/s.

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Answer:

B. I looked it up I hope it's right

Explanation:

i hope this helps.

Answer:

its obviously C

Explanation:

i smart like dat

The length of brass rod after expansion is 2.0036m.

By definition, the length increase is:

Delta L = Alpha L_0 Delta TΔL=αL

naΔT

where alpha = 18 times 10^{-6}K^{-1}α=18×10−6

K-1

is expansion, L0 = 2 ml

na=2m is the initial length and Delta T = 100KΔT=100K is the temperature change. How to get:

Delta L = 18 times 10^{-6}cdot 2cdot 100 = 3.6 times 10^{-3} = 0.0036mΔL=18×10

−6

⋅2⋅100=3.6×10

−3

= 0.0036 meters

So the final length is:

L = L0 + delta L = 2 m + 0.0036 m = 2.0036 ml = l

0

na

+ΔL=2m+0.0036m=2.0036m

Linear expansion is the rate of increase in length of a solid sample per unit rise in temperature. If the length of the sample increases from l1 to l2 as the temperature increases by θ°, the expansion (α) is given by

l2 = l1(1 + αθ). This relationship assumes that α is independent of temperature.

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Answer:

C. Do not write anything next to it.

Explanation:

If an equation is already balanced there is no need to provide information of that.

Answer:

ITS FALSE

Explanation:

I just did the quest and I wrote true and I was wronged so put False.

Main Answer: The energy of the photon emitted by the harmonic oscillator when it drops from energy level 6 to energy level 3 is approximately -3.00 x 10^-1 Joules.

Supporting Question and Answer:

What is the relationship between the energy levels of a harmonic oscillator and the energy of the emitted photon?

The energy of the emitted photon is determined by the difference in energy levels of the harmonic oscillator.

Body of the Solution:To calculate the energy of a photon emitted by a harmonic oscillator when it drops from one energy level to another, we can use the formula:

E = hf

where E is the energy of the photon,

h is Planck'sconstant(approximately 6.626 x 10^-34 J·s), and f is the frequency of the emitted photon.

The frequency of the emitted photon can be determined using the formula:

f = (E2 - E1) / h

where E2 and E1 are the energies of the initial and final energy levels, respectively.

Given:

Stiffness of the harmonic oscillator (k) = 34 N/m

Mass of the oscillator (m) = 8.4 x 10^-26 kg

Initial energy level (E1) = 6

Final energy level (E2) = 3

First, let's find the frequency (f):

f = (E2 - E1) / h

= (3 - 6) / (6.626 x 10^-34 J·s)

≈ -4.54 x 10^33 Hz (negative sign indicates emission)

Now, we can calculate the energy of the photon (E):

E = hf = (-4.54 x 10^33 Hz) x (6.626 x 10^-34 J·s)

≈ -3.00 x 10^-1 J (negative sign indicates emission)

Final Answer: Therefore, the energy of the photon emitted by the harmonic oscillator when it drops from energy level 6 to energy level 3 is approximately -3.00 x 10^-1 Joules.

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The energy of the photon emitted by the harmonic oscillator when it drops from energy level 6 to energy level 3 is approximately -3.00 x \(10^{-1\)Joules.

The energy of the emitted photon is determined by the difference in energy levels of the harmonic oscillator.

To calculate the energy of a photon emitted by a harmonic oscillator when it drops from one energy level to another, we can use the formula:

E = hf

where E is the energy of the photon,

h is Planck's constant (approximately 6.626 x \(10^{-34\) J·s), and f is the frequency of the emitted photon.

The frequency of the emitted photon can be determined using the formula:

f = (E2 - E1) / h

where E2 and E1 are the energies of the initial and final energy levels, respectively.

Given:

Stiffness of the harmonic oscillator (k) = 34 N/m

Mass of the oscillator (m) = 8.4 x \(10^{-26\) kg

Initial energy level (E1) = 6

Final energy level (E2) = 3

First, let's find the frequency (f):

f = (E2 - E1) / h

= (3 - 6) / (6.626 x\(10^{-34\) J·s)

≈ -4.54 x \(10^{33\) Hz (negative sign indicates emission)

Now, we can calculate the energy of the photon (E):

E = hf = (-4.54 x \(10^{33\) Hz) x (6.626 x\(10^{-34\) J·s)

≈ -3.00 x \(10^{-1\) J (negative sign indicates emission)

Therefore, the energy of the photon emitted by the harmonic oscillator when it drops from energy level 6 to energy level 3 is approximately -3.00 x \(10^{-1\) Joules.

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Answer: 40.2m/sec

Work: v=p/m= 5.83kg/0.145k=40.2cm/sec

Coal is extracted from mountain top by removal of top soil and the use of explosives.

A coal is definitely as the solid substance that is made up of mainly carbon and other constituent elements such as hydrogen, sulfur, oxygen, and nitrogen.

The uses of coal include the following:

To extract coal from the mountain top the following is carried out:

The top soil of the area involved us being removed and

Explosives are then used to expose the underlying coal seams.

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The pressure in your tires would decrease due to the decrease in temperature. The relationship between temperature and pressure is known as the ideal gas law.

which states that pressure and temperature are directly proportional to each other. As the temperature drops, so does the pressure in the tires. The ideal gas law formula is P1/T1 = P2/T2, where P1 is the initial pressure, T1 is the initial temperature, P2 is the final pressure, and T2 is the final temperature.

Using this formula and assuming that the volume of the tires remains constant, we can calculate the final pressure in the tires. P1 is 38 psi, T1 is 25°C + 273.15 (to convert to Kelvin) = 298.15 K, T2 is 0°C + 273.15 = 273.15 K. Plugging in the values, we get P2 = (38 psi * 273.15 K) / 298.15 K = 34.9 psi. Therefore, the pressure in your tires would be approximately 34.9 psi when the temperature drops to 0°C.

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"The clock on the big ben tower in London reads 12 noon. If you travel away from the clock at a very high speed and view it with a telescope, you would see it run slower than a clock in your vehicle" (Option A) This phenomenon is known as Time Dilation.

Time dilation is defined in physics and relativity as the difference in elapsed time as measured by two clocks. It is either owing to a difference in relative velocity or a difference in gravitational potential between their places.

When left undefined, "time dilation" generally refers to the impact of velocity.

Time dilation is the "slowing down" of a clock as determined by an observer in relative motion with regard to that clock under the theory of special relativity.

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Full Question:

Suppose you look at the huge clock on the Big Ben Tower in London and it reads 12 noon. If you could travel away from the clock at the speed of light and view it with a telescope, it would:

a) run slower than usual

b) run faster than usual

c) be frozen at 12 noon

Answer:

i hope this helps!

Explanation:

Artificial Insemination (AI) is an Assisted Reproductive Technology (ART) used worldwide to deposit stored semen directly into a cow or heifer's uterus. It is a tool for improving reproductive performance and genetic quality of livestock.

source: https://nwdistrict.ifas.ufl.edu/phag/2020/05/29/tips-for-successful-artificial-insemination-of-cattle/

Mass, m of the computer is 0.82kg.

Given the following data:

Weight of computer = 8N

Acceleration due to gravity = 9.8m/s

Weight is the product of the mass of an object or body multiplied by gravity.

Mathematically, weight is:

\(\text{W = mg}\)

Where:

W represents the weight of a computer measured in Newton.

m represents the mass of a computer measured in kilograms.

a represents acceleration due to gravity measured in meter per seconds.

\(\text{m}=\frac{\txet{W}}{9}\)

\(\text{m}=\dfrac{8}{9.8}\)

\(\text{m}=0.81632653\thickapprox0.82\)

Mass, m = 0.82kg.

Therefore, the mass of the computer is 0.82kg.

The final temperature of the system is  63.33° C.

A body or thermodynamic system can release or absorb latent heat during a constant-temperature process, often a first-order phase transition.

Latent heat is energy that is provided or removed in a concealed form to alter the state of a substance without altering its temperature.

The applied heat = 6.0 × 10⁵ Joule

Mass of the ice = 1 kg

Latent heat of ice fusion = 334 kJ/kg

Hence,

334000 × 1 + 1 × 4200× (t - 0) =  6.0 × 10⁵

4200 × t = 266000

t = 63.33° C

Hence, the final temperature of the system is  63.33° C.

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The momentum of an isolated system before and after a collision must equal each other, according to the law of conservation of momentum.

The only thing that happens when two bodies collide is that their momentum changes. Thus, for bodies colliding, changes in momentum are always equal and opposite. The momentum of the other body must decrease by the same amount if the momentum of the first body increases. As a result, momentum always remains constant.

Regardless of the type of collision, momentum is always conserved. Although mass is conserved regardless of the type of collision, an inelastic collision may cause the mass to deform, leading to the two possibilities.

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Answer:

232 N

Explanation:

By Hooke's law, the force applied to a spring is proportional to the stretch of the spring, so

F = kx

Where F is the force, k is the spring constant and x is how much it is stretched.

So, replacing k by 58N/cm and x by 4 cm, we get

F = (58 N/cm)(4 cm)

F = 232 N

Therefore, the force applied is 232 N

The temperature rise the second cylinder B is 5/3 times the temperature in the cylinder A.

The heat source for both cylinders was:

ΔQ₁ = ΔQ₂  .....eq 1

Gas will expand in a cylinder with a free piston so that the pressure is always constant.

P = constant

Then,

ΔQ₁ = n.Cp.ΔT

ΔQ₁ = n.Cp.T₀  .....eq 2

With Fixed piston for cylinder (constant volume process),

V = constant

ΔQ₁ = n.Cv.ΔT  .....eq 3

From eq 1

n.Cp.T₀  =  n.Cv.ΔT

ΔT = (Cp/Cv) . T₀

ΔT = γ T₀

For the monatomic gas (γ = 5/3)

ΔT = 5/3 T₀

Thus, the temperature rise the second cylinder B is 5/3 times the temperature in the cylinder A.

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Answer:

true

Explanation:

true

After 5 seconds, the person would have travel 75 m

This is defined as the rate of change of velocity which time. It is expressed as

a = (v – u) / t

Where

We'll begin by obtaining the final velocity of the person. This can be obtained as follow:

a = (v – u) / t

2 = (v – 10) / 5

Cross multiply

v – 10 = 2 × 5

v – 10 = 10

Collect like terms

v = 10 + 10

v = 20 m/s

The distance travelled can be obtained as follow:

v² = u² + 2as

Collect like terms

2as = v² - u²

Divide both sides by 2a

s = (v² - u²) / 2a

s = (20² - 10²) / (2 × 2)

s = 75 m

Thus, the distance travelled by the person is 75 m

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Answer:

60 km/h

Explanation:

Simplify the speed:

120÷2=60

Hence, the average speed is 60 km/h.

Answer:v

Both prokaryotic and eukaryotic cells have similar features, like ribosomes, genetic material, a cytoplasm, and plasma membranes. There are two primary types of eukaryotic cells: animal and plant cells.

Explanation:

None of the provided options (11.0%, 12.0%, 100%, 110%) are correct. The correct answer is approximately 4.41%.

To calculate the rate of return of the risk-free portfolio, ready to utilize the concept of the capital allocation line (CAL).

The CAL speaks to a combination of a risky portfolio and a risk-free asset. In this case, we have two unsafe resources (securities X and Y) and need to decide the rate of return of the risk-free portfolio.

The formula for the CAL is:

CAL rate of return = risk-free rate + (portfolio standard deviation / risky asset standard deviation) * (risky asset rate of return - risk-free rate)

Let's plug in the given values:

Risk-free rate = 0% (since it's not specified)

Portfolio standard deviation = ?

Risky asset standard deviation (σX) = 85%

Risky asset rate of return (rX) = 9%

Correlation coefficient (ρ) = -1 (perfectly negatively correlated)

To calculate the portfolio standard deviation, we need the weights of the assets in the portfolio. Since it's not specified, we'll assume an equal weighting for simplicity.

Portfolio standard deviation = sqrt\(\sqrt{[(wX^2 * σX^2) + (wY^2 * σY^2) + 2 * wX * wY * ρ * σX * σY]}\)

Assuming equal weights (wX = wY = 0.5):

Portfolio standard deviation = sqrt\(\sqrt{[(0.5^2 * 85%^2)}\) +\(\sqrt{ (0.5^2 * 12%^2)}\) + \(2 * 0.5 * 0.5\)* \(-1 * 85% * 12%]\)

Simplifying:

Portfolio standard deviation = sqrt\(\sqrt{[(0.25 * 0.7225) + (0.25 * 0.0144) - 0.102 * 0.102]}\)

Portfolio standard deviation = \(\sqrt{[0.180625 + 0.0036 - 0.010404]}\)

=\(\sqrt{(0.173821) }\)

= 0.416783

Now, we can calculate the rate of return of the risk-free portfolio using the CAL formula:

CAL rate of return = 0% + (0.416783 / 0.85) * (9% - 0%)

CAL rate of return = 0 + (0.490335 * 0.09) = 0.044129

Converting to a percentage:

CAL rate of return = 0.044129 * 100% ≈ 4.41%

Therefore, none of the provided options (11.0%, 12.0%, 100%, 110%) are correct. The correct answer is approximately 4.41%.

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The complete question is-

Security X has expected return of 9% and standard deviation of 85%. Security Y has expected return of 14% and standard deviation of 12% The two securities have a correlation coefficient of 10 (perfectly negatively

correlated) The risk-free portfolio that can be formed with the two securities will warn a rate of return of

Select one

Oa 11.0%

Ob 12.0%

O 100%

Od. 110%

None of the options are correct.

Answer:

energy and matter

Explanation:

physics is the study of matter and it interaction with energy

Answer:

Debes de poner primero en metros y luego segundos o kilometros por segundo. como transformar
ejemplo:
1 metro = 3.6 km/s

Answer:

he is right it’s D

Explanation:

if u could not read his hand writing

Forces and motion are fundamental concepts in physics that help us understand the behavior of objects in motion. Forces can cause objects to accelerate, change direction, or stop moving altogether.

The three laws of motion proposed by Sir Isaac Newton provide a framework for understanding how forces affect motion. The first law states that an object at rest will stay at rest, and an object in motion will stay in motion, unless acted upon by an external force. The second law states that the acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to its mass. The third law states that every action has an equal and opposite reaction. To test these concepts in physical science, experiments can be designed to measure the effects of forces on motion, such as the acceleration of objects on inclined planes, the motion of objects in free fall, or the forces involved in collisions.

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The complete question is

Forces and motion until test for physical science eginuity credit recovery ?

The direction of the vector c = 48i - 42j is approximately -41.19 degrees. Since the angle is negative, it means the vector c is in the fourth quadrant.

To find the direction of the vector c = 2a - b, we first need to calculate the components of the new vector c.
1. Multiply vector a by 2:
2a = 2(12i - 16j) = 24i - 32j
2. Subtract vector b from the result of step 1:
c = 2a - b = (24i - 32j) - (-24i + 10j) = 24i - 32j + 24i - 10j
3. Combine like terms:
c = 48i - 42j
Now that we have the components of vector c, we can find its direction. The direction of a vector can be calculated using the tangent inverse function (arctan):
θ = arctan(opposite/adjacent) = arctan(c_j/c_i) = arctan((-42)/48)
Use a calculator to find the arctan value:
θ ≈ -41.19 degrees

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