PLS SOMEONE HELP QUICK

Dada la información de la pregunta, el calor absorbido por el cobre es de 12513 J o 2990 calorías.

El calor ganado se obtiene de la relación;

H = mcdt

Dónde;

H = calor absorbido

m = masa

c = capacidad calorífica del cobre

Δt = cambio de temperatura

La capacidad calorífica del cobre es de 385 J / kg / ° C

Entonces;

m = 250 gramos o 0,25 kg

Δt = 150 ° C - 20 ˚C = 130 ˚C

H = 0,25 kg * 385 J / kg / ° C * 130 ˚C

H = 12513 J o 2990 calorías

Más información: https://brainly.com/question/6505878

The potential energy at the top of the building is at its maximum, while the kinetic energy right before impact with the ground is at its maximum as well, assuming no air resistance.

When Galileo releases a ball at the top of the building, it possesses gravitational potential energy due to its position relative to the ground. At the highest point, the potential energy is at its maximum because the ball has the greatest height above the ground. As the ball falls, this potential energy is gradually converted into kinetic energy.

Just before impact with the ground, assuming no air resistance, the ball's potential energy is at its minimum because it is closest to the ground. However, its kinetic energy is at its maximum. The ball has accelerated under the influence of gravity, and as it falls, its velocity increases, resulting in higher kinetic energy. This conversion from potential energy to kinetic energy occurs due to the force of gravity acting on the ball as it descends.

In the absence of air resistance, the total mechanical energy of the ball (sum of potential and kinetic energy) remains constant throughout the motion, as energy is conserved. The maximum potential energy at the top of the building is completely transformed into maximum kinetic energy just before impact.

Know more about mechanical energy here:

https://brainly.com/question/13552918

#SPJ11

Answer:

four times as great

Explanation:

If we use the simple physics equations: F=ma, and (Vf^2-V0^2)/2d

we can see that since the final velocity of a crash is 0, the equation becomes F=m(V^2/2d). Assuming that we have the same distance to stop, when you double the velocity, the impact force is increased by four.

Answer:

Hope it help you

Stayhomestaysafe

Plz mark my answer brainliest✍️✍️

Explanation:

Sound travels fastest through solids. This is because molecules in a solid medium are much closer together than those in a liquid or gas, allowing sound waves to travel more quickly through it. In fact, sound waves travel over 17 times faster through steel than through air.

Option b

REAL NAME - SHRESTH DUBEY

Translate to English please

Answer:

r = 1.3m

Explanation:

The moment of inertia of a solid sphere can be expressed using the formula;

I = ⅖ mr²

Where;

I = moment (kgm²)

m = mass of the sphere (kg)

r = rotational radius of the sphere (m)

Based on the provided information in this question, I = 1.52 kgm², m = 2.25 kg, r = ?

1.52 = ⅖ × 2.25 × r²

1.52 = 0.4 × 2.25 × r²

1.52 = 0.9 × r²

1.52 = 0.9r²

r² = 1.52/0.9

r² = 1.688

r² = 1.69

r = √1.69

r = 1.3m

Answer:

The statement that best describes nuclear fusion is;

Nuclei combine to form a heavier nucleus, releasing energy

Explanation:

In nuclear fusion, we have the reaction of the nuclei of two or more atoms coming together (combining) to form heavier elements and subatomic particles such as protons and neutrons accompanied by the release or absorption in energy depending on the difference between the mass of the reactants and the products

Some nuclear fusion reaction require an input of energy and such reactions are therefore not spontaneous

The best option is nuclei (two or more nuclei) combine to form a heavier nucleus, releasing energy.

Answer:

The answer is the last option or D

Explanation:

Nuclei combine to form a heavier nucleus, releasing energy.

Have a great day and stay safe!

Answer:

1) and 2)

Explanation:

Hydrogen fuel is very efficient. More energy is extracted from this fuel source than with conventional power technologies, according to Tobin Smith for Billion Dollar Green. Fossil fuels have a high combustion rate and are capable of releasing tremendous amount of energy.

Answer:

8.01 (10^-10) m

Explanation:

use the Particle in a box equation

E = (n^2) (h^2) / (8 m (L^2))

and energy of a particle as its wavelength equation

h c / lamda = E

combine the equations to get

h c / lamda =  (n^2) (h^2) / (8 m (L^2))

get L alone

L^2 = (2^2 - 1^2) h lamda / 8 m c

the longest wavelength is produced by a jump from the first excited state to the ground so

n = 2 to n = 1

so

L^2 = (n1^2 - n2^2) h lamda / (8 m c)

h = 6.6(10^-34) J*s

c = 3(10^8) m/s

m = 9(10^-31) kg

lamda = 700(10^-9) m

n1 =2

n2=1

Answer:

Part 1: Matter can neither be created nor destroyed thus the product is always equal to the mass of reactants

Part 2: Conversation of Mass

Explanation:

:D

a) To convert the value of the work function from electron volts to joules, we know that, 1eV = 1.602×1\(0^{-19}\) J. Hence, we have to multiply the given value of work function by 1.602×1\(0^{-19}\).

∴ Work function (J) = 6.35 eV × 1.602×1\(0^{-19}\) J/eV = 1.017 × 1\(0^{-18}\) J. Therefore, the value of the work function for platinum in joules is 1.017 × 1\(0^{-18}\) J.

b) The cutoff frequency for a given metal is given by the formula ν0 = ϕ/h where h is the Planck's constant, ϕ is the work function, and ν0 is the cutoff frequency.

∴ ν0 = ϕ/h = 6.35 eV/ (6.626 × 1\(0^{-34}\) J/s) = 9.58 × 1\(0^{14}\) Hz Therefore, the cutoff frequency for platinum is 9.58 × 1\(0^{14}\) Hz.

c) The energy required to release the photoelectrons from platinum's surface is equal to its work function. The maximum wavelength of light is given by λmax = hc/ϕ, where h is the Planck's constant, c is the speed of light, and ϕ is the work function.

λmax = hc/ϕ = (6.626 × 1\(0^{-34}\) J/s × 3.00 × 10^8 m/s) / (6.35 eV × 1.602 × 1\(0^{-19}\) J/eV) = 1.945 × 1\(0^{-7}\) m = 194.5 nm Therefore, the maximum wavelength of light incident on platinum that releases photoelectrons from the platinum's surface is 194.5 nm.

d) If light of energy 8.30 eV is incident on platinum, the maximum kinetic energy of the ejected photoelectrons is given by KEmax = E − ϕ where E is the energy of the incident light and ϕ is the work function.

∴ KEmax = 8.30 eV - 6.35 eV = 1.95 eV Therefore, the maximum kinetic energy of the ejected photoelectrons is 1.95 eV.

e) For photons of energy 8.30 eV, the stopping potential required to arrest the current of ejected photoelectrons can be calculated by using the formula Vstop = E/KEmax where E is the energy of the incident light and KEmax is the maximum kinetic energy of the ejected photoelectrons.

∴ Vstop = 8.30 eV / 1.95 eV = 4.25 V Therefore, the stopping potential required to arrest the current of ejected photoelectrons is 4.25 V.

More on work function: https://brainly.com/question/12658742

#SPJ11

The ripe fruits is around the same size as the colored part of the thumb are grape and cherry. Hence, option (C) is correct.

Fruit is a blooming plant's fleshy or dry, fully developed ovary that contains a seed or seeds. As a result, apricots, bananas, and grapes are all considered to be fruits as well as bean pods, maize grains, tomatoes, cucumbers, and (in their shells) acorns and almonds. However, the term is typically only used to describe matured ovaries that are delicious and either pulpy or succulent.

A developed ovary and its related elements constitute a fruit in terms of botany. It often contains seeds that have grown from the encased ovule after fertilization, though parthenocarpy, or growth without fertilization, is also known.

Learn more about fruit here:

https://brainly.com/question/13048056

#SPJ2

DPP is a method of capital budgeting. It is the length of time required to recover the initial cash outflow discounted at a specific interest rate.

(i) Discounted Payback Period (DPP): It is a method of capital budgeting. It is the length of time required to recover the initial cash outflow discounted at a specific interest rate. Benefit/Cost Ratio (BCR): It is the ratio of the present value of benefits to the present value of costs. It is used in cost-benefit analysis to identify whether a proposed project or investment is feasible.

(ii) Elements of Bookkeeping: Cash book, purchase book, sales book, journal, ledger. Profit and Loss Account: It is an account that records a company's profits and losses for a specific period of time.

(iii) Common important finance ratios are: Current Ratio, Quick Ratio, Debt-Equity Ratio, Inventory Turnover Ratio, Debt-Service Coverage Ratio.

(iv) BFD, PFD & PID: Block Flow Diagram (BFD), Process Flow Diagram (PFD), and Piping and Instrumentation Diagram (PID) are used to illustrate the process flow.

(v) Gantt Chart: A Gantt chart is a project management tool that uses horizontal bars to represent the duration of tasks or activities in a project.

(vi) Ethics & Professionalism: Ethics and professionalism are the practices that professionals in a particular field must adhere to. It includes the principles of honesty, transparency, fairness, and accountability.

(vii) Heuristics for Storage Vessels and Pressure Vessels: Heuristics for storage vessels and pressure vessels include choosing the correct diameter to height ratio, selecting the right material of construction, designing suitable supports, and selecting appropriate insulation.

(viii) Heuristics for Reactors and Heat Exchangers: Heuristics for reactors and heat exchangers include determining the appropriate size and shape, selecting the right material of construction, and designing suitable internals.

(ix) Heuristics of Distillation and Absorption Towers: Heuristics for distillation and absorption towers include choosing the correct column diameter, selecting appropriate packing materials, and designing suitable feed locations.

To know more about initial cash:

https://brainly.com/question/31786139

#SPJ11

Answer:

emotions

Explanation:

emotions are how you feel and can happen any time

Hope it helps <333

Answer:

emotions affect your body and how you feel

In a typical star schema, each dimension record is related to thousands of facts records.

Star schema is explicit data warehouse scheme.

It is known by the name of star schema because it has a diagram like a star and it is a schema where the centre of the star can have one fact table and then have a number of associated dimension tables.

Star schema is beneficial for fast calculations and easy works. It can help us tell the total item sold and the gains.

The examples of data in star schema is sales price, sale quantity, distant, weight, speed and weight measurements .

To know more about star,

https://brainly.com/question/7379319

#SPJ4

Answer:

32 m

Explanation:

By energy conservation, total energy at the top of slide must be equal to the total energy at at the bottom.

therefore

mgh = (1/2)mv^2

v^2= 2gh

\(v = \sqrt(2gh)\) ..............(1) i.e., velocity is a function of height of slide.

1st part

Let height of blue slide be H and height of red slide be h.

Let velocity of rider in blue slide= V and red slide= v

At the bottom of slide,

From equation (1)

therefore  

\(\frac{V^{2}}{v^{2}} = \frac{2gH}{2gh}\)

Given, V= 2v  

\(\therefore  \frac{4v^{2}}{v^2{}} = \frac{H}{h}\)

H = 4h

therefore, height of blue slide is 4 times that of red slide= 4*8=32 m

Answer:

1.Tackle

2.helmet

3.touchdown

4.quarterback

5.interference

6.touchback

7.safety

8.cornerback

9.handoff

10.lateral

11. reciever

12.completion

13.interception

14.center

15.referee

16.huddle

17.overtime

18. facemask

19.pigskin

20.penalty

Explanation:

The correct words are "Tackle, Theme, Touchdown, Quarterback, Interference, Touchdown, Safety, Cornerback, Offhand, Aerial, Receiver, Completion, Receptionist, Center, Referee Huddle, Overtime, Safesmack, Kicking, and  Penalty."

A football word scramble is a game where a series of letters are provided in a scrambled order, and the goal is to rearrange those letters to form words related to football. Players need to unscramble the letters to identify the correct football-related terms, such as positions, equipment, or actions in the game. It is a fun and engaging activity that challenges players' knowledge and word-solving skills while connecting to the theme of football.

1. Tackle

2. Theme

3. Touchdown

4. Quarterback

5. Interference

6. Touchdown

7. Safety

8. Cornerback

9. Offhand

10. Aerial

11. Receiver

12. Completion

13. Receptionist

14. Center

15. Referee

16. Huddle

17. Overtime

18. Safesmack

19. Kicking

20. Penalty

Therefore, The correct answers are "Tackle, Theme, Touchdown, Quarterback, Interference, Touchdown, Safety, Cornerback, Offhand, Aerial, Receiver, Completion, Receptionist, Center, Referee, Huddle, Overtime, Safesmack, Kicking, and  Penalty."

To learn more about words click:

https://brainly.com/question/31692803

#SPJ6

Answer:

7.45 Ω

Explanation:

From the question given above, the following data were obtained:

Resistor 1 (R₁) = 2.50 Ω

Resistor 2 (R₂) = 4.95 Ω

Voltage (V) = 12 V

Equivalent Resistance (Rₑq) =?

Since the resistors are in series arrangement, the equivalent resistance can be obtained as follow:

Rₑq = R₁ + R₂

Rₑq = 2.5 + 4.95

Rₑq = 7.45 Ω

Therefore, the equivalent resistance is 7.45 Ω

Answer: chemical change.

Explanation: Because the bleach has caused the denim to change color, the change is likely to be a chemical change.

The change that occurs when household bleach is spilled on denim jeans is a chemical change.

A physical change is a change in the form of a substance, but not in its chemical composition. For example, if you melt a piece of ice, you have made a physical change because the ice has changed from a solid to a liquid, but the chemical composition of the ice has not changed.

A chemical change is a change in the chemical composition of a substance. This means that the atoms in the substance are rearranged to form new substances. For example, when household bleach is spilled on denim jeans, the bleach reacts with the indigo dye in the jeans to form a new substance that is colorless.

In the case of household bleach on denim jeans, the bleach reacts with the indigo dye in the jeans to form a new substance that is colorless. This is a chemical change because the chemical composition of the indigo dye has been changed. The color change is a clear indication that a chemical change has occurred. When the bleach reacts with the indigo dye, the bonds between the atoms in the indigo dye are broken and new bonds are formed. This results in the formation of a new substance that is colorless.

To know more about the Chemical, here

https://brainly.com/question/2544616

#SPJ3

Neglecting all other forces, if the pressure gradient force doubles in magnitude, the wind speed doubles in magnitude as well. Therefore, the correct option is (c) the wind speed doubles in magnitude.

The pressure gradient force is responsible for causing the wind to move from high pressure to low pressure areas. It is directly proportional to the magnitude of the pressure difference and inversely proportional to the distance between the two pressure points. If the pressure gradient force doubles, the wind speed will also double, as the wind will need to accelerate more to compensate for the stronger force acting upon it.

The other options are not affected by a doubling of the pressure gradient force. The wind moving in a circle with double the radius would be affected by changes in the Coriolis force, not the pressure gradient force. The wind experiencing double the friction would be affected by changes in frictional forces, not the pressure gradient force.

The wind changing direction would be affected by changes in the Coriolis force or by changes in the direction of the pressure gradient force, not the magnitude of the pressure gradient force alone.

learn more about pressure gradient force here:

https://brainly.com/question/30463106

#SPJ11

Answer:

true

Explanation:

Explanation:

SI system is advantageous over mks system because SI system is intended to extend by its definition and has 7 base which is more than MKS system .

Hope it is helpful to you ☺️

Answer:

Explanation:

SI system is advantageous over mks system because SI system is intended to extend by its definition and has 7 base which is more than MKS system.

Answer:2

Explanation:

The net electric field is zero at points P' and P'' in the diagram.

The given diagram shows two point-like objects with charges q and 4q respectively. To find the points at which the net electric field is zero, we need to consider the electric fields produced by each point charge at various points in space.

Let's assume that the distance between the two charges is d. Using Coulomb's law, we can calculate the electric field produced by each charge at a distance r from it. For a point charge Q, the electric field E produced at a distance r from it is given by:

E = kQ/r^2

where k is the Coulomb constant (k = 9 x 10^9 Nm^2/C^2).

At point P, the electric field produced by the charge q is:

E1 = kq/(d/2)^2

At point P, the electric field produced by the charge 4q is:

E2 = k(4q)/(d/2)^2

The net electric field at point P due to both charges is the vector sum of E1 and E2. If the net electric field is zero, then E1 and E2 must have equal magnitudes and opposite directions. Thus, we can set E1 = -E2 and solve for the distance r from each charge where this condition is met.

kq/(d/2)^2 = -k(4q)/(d/2 + r)^2

Solving for r, we get:

r = ±d/3

Therefore, the net electric field is zero at two points equidistant from the charges, on the line joining them and at a distance of d/3 from each charge. Thus, the net electric field is zero at points P' and P'' in the diagram. Note that this analysis assumes that the charges are point-like and the distance d between them is much larger than their sizes. If the sizes of the charges are not negligible compared to d, then the analysis becomes more complicated.

For such more questions on electric

https://brainly.com/question/26978411

#SPJ11

Answer:

1. Reuse your bath water for plants

2. Take speedy showers.

3. Turn off the water while brushing your teeth.

4. Help fill the dishwasher.

5. Wash your apple in a bowl of water.

6. Don't wash your car often

7. Fix any leaky taps at home

8. Collect rainwater

9. Avoid the use of recreational water toys

10. Don’t fill up a water cup to the brim

13.The color with the longest wavelength is option A. Red.

14.The sky appears blue due to option D. Scattering of light.

Red light has a longer wavelength compared to yellow and blue light.The color that has the longest wavelength is red. The color of the sky appears blue due to scattering of light. The distance between one peak and the next in a series of waves, particularly electromagnetic waves traveling through space or along a wire is referred to as wavelength.

The wavelength of light, for example, determines its color. Red light has the longest wavelength, followed by orange, yellow, green, blue, and purple, with violet light having the shortest wavelength. When light is reflected off a surface or passes through a medium, it can be deflected in various directions, a phenomenon known as scattering of light.

The Earth's atmosphere scatters sunlight in all directions, but the shorter blue wavelengths are scattered more than the longer wavelengths. As a result, we perceive the sky as blue during the day.  The light becomes scattered when it interacts with particles in the atmosphere, causing the sky to appear blue during the day and red during sunset or sunrise. The scattering of light is the process that causes the sky to appear blue.

Know more about   wavelength    here:

https://brainly.com/question/10750459

#SPJ8

momentum= mass × velocity

p= 50×18

momentum= 900 kg m/s

Answer:

E=hf

Were, h = Planck constant 6.67*10^11

E=3.8*10^24 * 6.67*10^11= 2.508*q0^36j

Answer:

Elastic Potential Energy because a rubber band that is stretched has elastic potential energy, because when released, the rubber band will spring back toward its resting state, transferring the potential energy to kinetic energy in the process.

Explanation: