What force would be needed to increase a 450 kg object's velocity from 15 m/s to 75 m/s in 1 minute?

The voltage across the 34 uF capacitor when a 12-V battery is connected to three capacitors in series with capacitances of 5.0 uF, 10 uF, and 34 uF is 1.07 V.

To find the voltage across the 34 uF capacitor when a 12-V battery is connected to three capacitors in series with capacitances of 5.0 uF, 10 uF, and 34 uF, we first need to find the equivalent capacitance (C_eq) of the series combination. The formula for capacitors in series is:

1/C_eq = 1/C₁ + 1/C₂ + 1/C₃

Plugging in the values:

1/C_eq = 1/5 + 1/10 + 1/34

1/C_eq = 0.2 + 0.1 + 0.0294

1/C_eq ≈ 0.3294

C_eq ≈ 3.035 uF

Now, we can use the formula Q = C * V to find the charge (Q) stored in the equivalent capacitor:

Q = C_eq * V

Q ≈ 3.035 uF * 12 V

Q ≈ 36.42 uC

Since the charge on each capacitor in series is the same, we can use the same charge value to find the voltage (ΔV) across the 34 uF capacitor:

ΔV = Q / C

ΔV ≈ 36.42 uC / 34 uF

ΔV ≈ 1.07 V

Thus, the voltage across the 34 uF capacitor is approximately 1.07 V, expressed using two significant figures.

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the power supplied to the starter motor of the large truck is 6,000 kW. by using formula of power P=VI where v is voltage and I is current

The power supplied to the starter motor can be calculated using the formula P=VI, where P is power in watts, V is voltage in volts, and I is current in amperes.
First, we need to convert the current from amperes to milliamperes (mA) since the unit of power is watts and the unit of current needs to be in the same SI unit as voltage.
240 A = 240,000 mA
Then, we can substitute the given values into the formula:
P = VI = (25.0 V)(240,000 mA) = 6,000,000 mW
To convert milliwatts (mW) to kilowatts (kW), we divide by 1,000:
P = 6,000,000 mW ÷ 1,000 = 6,000 kW
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Answer:

2100 m

2804 g

4 '2 mm squares'

20,000 photos

Explanation:

1.5 km = 1500 m

1500 m + 600 m = 2100 m

2.8 kg = 2800 g

2800 g + 4 g = 2804 g

8mm tube / 2 mm squares

4 can fit

1 Gb = 1000 mb

40 Gb = 40,000 mb

40,000 mb / 2 mb = 20,000 photos

Here's all the help you need:

1).  1 km  =  1,000- m

2).  1 kg  =  1,000 g

3).  Freebie.  2 fits into 8 four times.

4).  1 mega...  =  1,000 kilo...

5).  1 Giga...  =  1,000 Mega...

Answer:

536 miles

Explanation:

If the airplane is running at a speed of 804 miles per hour, and covers a distance, x in a particular number of mile. The distance in mile can be gotten they the application of direct formula. Multiplying the speed by the time it took, and thus

804 mph * 40

Remember the time is in minutes and not hours, so, you convert it to hours.

804 * 40/60 hours =

536 miles

The efficiency of the engine through the four steps cycle is 83.4%.

The efficiency of a machine is the ratio of useful work done by the machine and the work done on the machine expressed as a percentage.

The efficiency of the engine is given by:

\(ɛ=\frac {W} {Q}\)

where;

Since there at four steps in a cycle:

\(ɛ=\frac {W_1+ W_2+W_3+W_4} {Q_1+Q_2+Q_3+Q_4}\)

The work done in the first step (isothermal expansion) is given by:

\(W_1=nRT_1\ln{\frac {V_2} { V_1}}\)

where:

n= 1 mole, T1 = 402 K, V2 = 41.2 L, V1 = 18.5 L

Substituting the values:

\(W_1 = 1 × 8.314 × 402 \times ln{\frac {41.2} {18.5}} = 2676.01 J \\ \)

Steps 2 and 4 are constant volume processes, therefore;

\(W_2=W_4=0\)

The work done in the third step (isothermal expansion) is given by:

\(W_3=nRT_3\ln{\frac {V_4} { V_3}} \)

where;

n = 1 mol, T3 = 273 K, V4 = 41.2 L, V3 = 18.5 L

Substituting the values:

\(W_3 = 1 × 8.314 × 273 \times ln{\frac {41.2} {18.5}} = 1817.29 J \\ \)

\(W_3 = 1 × 8.314 × 273 \times ln{\frac {41.2} {18.5}} = 1817.29 J \\ \)Heat enters the system only during steps (1) and (4).

The internal energy of the gas increases in step 4 but no work is done, while the internal energy is constant change in step 1 but work is done by the gas.

Thus;

\(Q_2=Q_3=0\)

The heat that enters the system during the isothermal expansion is given by:

\(Q_1=W_1\)

The heat that enters the system on step 4 at constant volume is given by:

\(Q_4=C_V(T_4-T_3)\)

where:

Cv =21 J/K, T3 = 273 K, T4 = 402 K

Substituting the values:

\(Q_4= 21 × (402 - 273) = 2709 \: J\)

Solving for efficiency, ɛ:

\(ɛ=\frac {2676.01+ 0+0+1817.29} {2676.01+0+0+2709} = 83.4\%\)

Therefore, the efficiency of the engine is 83.4%.

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Explanation:

Because they evolved rapidly, and moulted like other arthropods,trilobites serve as excellent index fossils, enabling geologists to date the age of the rock in which they are found

y component of the force exerted by A on C is zero

The electric force acting on a charged particle in an electric field is the product of the charge on the particle and the electric field that the particle is experiencing.

Hence, the formula for calculating electric force is given as; F =  q where,F is the electric force (in newtons),q is the charge on the particle (in coulombs), andE is the electric field (in newtons per coulomb).

The formula used to calculate the electric field at a given point in space due to a point charge is given as;E = kq/r²

Where,E is the electric field (in newtons per coulomb),q is the charge on the particle (in coulombs),r is the distance between the particle and the point where the electric field is being calculated (in meters), andk is the Coulomb constant, which is 8.99 × 10⁹ N · m²/C².

The direction of the electric force is the same as the direction of the electric field.Let's calculate the electric force acting on particle C due to particle A and B.

The distance between A and C is given as;sqrt[(0 - 0)² + (3.00 - 0)²] = 3.00mThe distance between B and C is given as;sqrt[(4.00 - 0)² + (3.00 - 0)²] = 5.00m

(a) Electric force acting on C due to A;FAC = kq1q2/r² = (8.99 × 10⁹ N · m²/C²)(3.00× 10⁻⁴C)(1.00 × 10⁻⁴C)/(3.00m)²= 90 N/C

The direction of the electric force on C due to A is along the line joining A and C and pointing away from A.

(b) Electric force acting on C due to A has no y-component because it is in the same direction as the y-axis. So the y-component of the electric force acting on particle C due to particle A is zero.

Hence, y component of the force exerted by A on C is zero. Answer: 0.

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Answer:

All the energy in oil, gas, and coal originally came from the sun, captured through photosynthesis. In the same way that we burn wood to release energy that trees capture from the sun, we burn fossil fuels to release the energy that ancient plants captured from the sun.

Ohm's law states that:

where V is the voltage, R is the resistance and I is the current; in this case the current is 0.51 A and the resistance is 29 Ohms. Plugging these and solving for the voltage we have:

Therefore, the voltage is 14.79 V

Answer:

They transmit by vibration through mediums such as air.  So #3 is most logical answer.

Explanation:

It is in fact vibration of air (sound waves) which is transformed by the tympanic membrane in the ear of human to audible sounds.

++++++++++++++++++++++++++++++++++++++++++++++

Sound travels slower than light

Move faster in water than air.

Wind blowing through leaves and other objects creates sounds.

Answer:

(Question) Which type of wave needs a medium to travel?

(Answer) sound waves, because they travel by oscillating molecules

(Question) What do both sound and light waves transfer?

(Answer) energy

(Question) How does an increase in amplitude affect sound and light waves?

(Answer) louder sound and brighter light

(Question) What happens to the wavelength when the frequency increases?

(Answer) The wavelength decreases.

(Question) Which of the following is true about sound waves?

(Answer) Sound moves faster in the ocean than in the air.

Explanation:

i just did the quick check

Answer:

a low protein diet helps you lose weight because lack of protein can make you lose muscle mass

Explanation:

It cuts your strength it makes it harder to keep your balance and slows your metabolism and later you get tired easily it leads to muscle wasting overtime and sheds your fat

Thus, g = GPE / (m*h) = 3 / (4*4) = 0.75 m/s2. Therefore, the gravitational field strength experienced by the object is 0.75 m/s2.

What is gravitational field strength?

Gravitational field strength is a measure of the gravitational force per unit mass at a given location in space.It is typically measured in Newtons per kilogram (N/kg) or meters per second squared (m/s2). Gravitational field strength is an important concept in understanding the effects of gravity on objects and how it affects their behavior.

It is represented by the symbol g and is calculated by dividing the gravitational force by the mass of an object. It is typically measured in units of meters per second squared (m/s2).

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The 21 cm radiation provides information about the gas clouds, including their temperature and density, as well as their magnetic field strength and chemical composition.

The radiation also helps to map out the structure of the Milky Way galaxy and its surrounding regions.21 cm radiation is a type of radio wavelength radiation that is emitted by neutral hydrogen atoms. When these atoms change the direction of their spins, they emit radiation at a wavelength of 21 centimeters. This radiation is able to penetrate dust clouds and other obstacles in space, allowing astronomers to study the gas clouds that make up the Milky Way and other galaxies. The 21 cm radiation provides information about the gas clouds, including their temperature and density, as well as their magnetic field strength and chemical composition. By studying this radiation, astronomers can create detailed maps of the Milky Way galaxy and the regions surrounding it.

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Lake Mead, the reservoir above the Hoover Dam, has a surface area of approximately 640 km2, so here is the gravitational potential energy of the top 1 meter of water in Lake Mead: 1.42 x \(10^1^7\) J.

Here the calculation for the gravitational potential energy is given below,  

PE = m × g × h

Here,  m = density of water × volume of water                    

m= 1000 kg/\(m^3\) × 640 \(km^2\)× 1 m

m= 640,000,000,000 kg

PE = 640,000,000,000 kg * 9.8 m/\(s^2\) * 220 m

PE= 1.42 x\(10^1^7\) J

Hence, Lake Mead, the reservoir above the Hoover Dam, has a surface area of approximately 640 km2, so here is the gravitational potential energy of the top 1 meter of water in Lake Mead: 1.42 x \(10^1^7\) J.

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The ozone layer is a region of the Earth's stratosphere that contains a high concentration of ozone (O3) molecules.

It plays a crucial role in protecting life on Earth by absorbing the majority of the Sun's harmful ultraviolet (UV) radiation. The depletion of the ozone layer, primarily caused by human activities, leads to an increase in UV radiation reaching the Earth's surface. This has significant adverse effects on human health, ecosystems, and the environment.

The ozone layer is located in the Earth's stratosphere, approximately 10 to 50 kilometers above the surface. It is formed by the interaction of UV radiation from the Sun with oxygen molecules (O2). The UV radiation breaks apart the oxygen molecules, and the resulting oxygen atoms (O) combine with other oxygen molecules to form ozone (O3).

The ozone layer is essential because it acts as a shield, absorbing the majority of the Sun's UV-B and UV-C radiation, preventing it from reaching the Earth's surface. UV radiation is harmful to living organisms, as it can cause DNA damage, skin cancer, cataracts, and weakened immune systems. The ozone layer's ability to filter out these harmful rays helps protect human health and supports the functioning of ecosystems.

However, human activities have significantly contributed to the depletion of the ozone layer, primarily through the release of certain chemicals known as ozone-depleting substances (ODS), such as chlorofluorocarbons (CFCs) and halons. These substances were commonly used in aerosols, refrigeration, air conditioning, and fire suppression systems. Once released into the atmosphere, ODS molecules can reach the stratosphere and undergo reactions that break down ozone molecules.

The depletion of the ozone layer has several detrimental effects. Increased UV radiation reaching the Earth's surface can lead to an increase in skin cancer cases, cataracts, and other health issues in humans. UV radiation also harms phytoplankton, which are vital for marine ecosystems and the global carbon cycle. Additionally, UV radiation can negatively impact terrestrial and aquatic ecosystems, causing DNA damage, reduced plant growth, disruption of food chains, and harm to coral reefs and other sensitive marine organisms.

Recognizing the importance of protecting the ozone layer, the international community developed the Montreal Protocol in 1987, which aims to phase out the production and use of ODS. Through global efforts to reduce ODS emissions, there has been a gradual recovery of the ozone layer in recent years.

In short , the ozone layer acts as a natural shield, protecting life on Earth from harmful UV radiation. The depletion of the ozone layer due to human activities has severe consequences for human health, ecosystems, and the environment. It is crucial to continue efforts to reduce ozone-depleting substances and preserve the integrity of the ozone layer for the well-being of present and future generations.

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Thermal system is used on some electric and hybrid vehicles to cool the power electronics and charger modules.

What is thermal system?

An isolated system has no interaction with the rest of the physical universe, a closed system can only exchange heat and work, and an open system can also exchange mass. In thermodynamics, a system is the portion of the physical universe that the observer chooses to analyse separately from the rest.

A thermal system, on the other hand, is a complex assembly of coupled components, some of which are thermal, that exhibits a common structured behavior  for instance, a refrigerator consists of pipes, a compressor, an electric motor, heat exchangers, valves, insulation, a casing, doors, a lamp, and other components that interact to achieve the internal goal of producing cold.

The interior space or the refrigerant are thermodynamic systems, whereas a refrigerator is a thermal system. While large thermal systems, like a refrigerated store, are constructed on the job site, small thermal systems, like a refrigerator, typically come fully installed from the manufacturer (although a straightforward split-air-conditioning system needs installation). Thermal systems often require services such as fuel supply, flue stack, water intake and exit, air intake and exit, and electrical supply (for power or at least for control).

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The speed of the petunia rolls is obtained from the calculation as 12.8 Km/hr.

The term speed is the ratio of the distance to the time that is taken by a body. We know that speed is how we would know how fast or slow that a material is moving and the unit that we can use to measure the speed of an object is kilometers per hour.

Distance covered by the object = 16Km

Time taken by the object = 1.25hrs

Speed = Distance/ Time

Speed =  16Km/ 1.25hrs

= 12.8 Km/hr

The speed is 12.8 Km/hr.

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Wave a carries more energy than wave b. Wave b has a smaller amplitude than wave a.

Those waves carry an amount of energy that can be measured. The energy in a wave is determined by two variables. One is amplitude, which is the distance from the rest position of a wave to the top or bottom. Large amplitude waves contain more energy. Wave A has greater intensity and transfers more energy. Wave B has greater intensity and transfers more energy. Waves that require matter to transfer energy are mechanical waves. The matter through which a mechanical wave travels is called a medium. A mechanical wave travels as energy is transferred from particle to particle in the medium. There are two kinds of mechanical waves. The greater the amplitude of the wave the greater the wave's energy. ... A wavelength will travel only as long as it has the energy to carry. Gamma rays

Gamma rays have the highest energies, the shortest wavelengths, and the highest frequencies. Radio waves, on the other hand, have the lowest energies, longest wavelengths, and lowest frequencies of any type of EM radiation. Electromagnetic waves cause oscillations in electrical and magnetic fields. It is important to remember that all waves transfer energy but they do not transfer matter. For example, if a ball is placed on the surface of a pond when ripples move across it, the ball will move up and down but not outwards with the wave.

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Answer:

Low temperatures, strong winds, intense sunlight, very low air pressure

Explanation:

These together will cause sublimation to occur.

Answer:

For sublimation to occur, the following conditions must be met (check explanation):

Explanation:

The substance must be in a solid phase at the beginning of the process.

The substance must be placed in an environment with a temperature and pressure such that it can exist in both a solid and a gas phase at the same time.

The substance must be able to break its bonds with other molecules and transfer to a gas phase directly from the solid phase, without ever becoming a liquid.

The vapor pressure of the substance at the triple point must equal the atmospheric pressure, so that the substance can evaporate from the solid phase and become a gas.

The speed of the spaceship is 0.099c.

Speed is the fastest movement of something.

Given:

L = 30 m is the proper length of the ship

• Delta*L = 13.8cm = 0.13m is the change in length

Let us first determine our contracted length. We can do this by subtraction:

L = 30m - 0.13m

We get:

L = 29.87

Now to determine the speed of the ship, we use the length contraction equation:

L = L_{0} * √(1 - (v ^ 2)/(c ^ 2))

We isolate the square root term:

√(1 - (v ^ 2)/(c ^ 2)) = L/L_{0} To simplify calculations, let us first substitute our lengths:

√(1 - (v ^ 2)/(c ^ 2)) = (29.87/(30) =

= 0.995

After calculation

V/C = 0.099874

Or V= 0.099c

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Ionized atoms and molecules were accelerated through a 30 kV potential difference and then sent through a chamber of length 18.8 cm. The travel time for a singly ionized molecule of water in the time-of-flight mass spectrometer is approximately 1.399 x \(10^{-7}\) seconds.

To calculate the travel time for a singly ionized molecule of water in the time-of-flight mass spectrometer, we will follow the steps outlined in the previous response.

Given:

L = 18.8 cm = 0.188 m (length of the chamber)

q = 1e (elementary charge) (charge of a singly ionized water molecule)

V = 30 kV = 30,000 V (potential difference)

m = 18 g/mol (mass of a water molecule)

First, convert the mass of the water molecule to kilograms:

m = 18 g/mol = 18 x \(10^{-3}\) kg/mol

Next, calculate the velocity of the ionized water molecule:

v = √((2 * q * V) / m)

v = √((2 * 1.602 x \(10^{-19}\) C * 30,000 V) / (18 x \(10^{-3}\) kg/mol))

Simplifying the expression:

v ≈ 1.343 x \(10^{6}\) m/s

Finally, determine the travel time (TOF):

TOF = L / v

TOF = (0.188 m) / (1.343 x \(10^{6}\) m/s)

Calculating the expression:

TOF ≈ 1.399 x \(10^{-7}\)  s

Therefore, the travel time for a singly ionized molecule of water in the time-of-flight mass spectrometer is approximately 1.399 x \(10^{-7}\)  seconds.

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Answer:

33 Celsius is 306.15 in absolute temperature

Answer:

100 g

Explanation:

Let the mass of density 1.2 g/cm³ be x gram and let the mass of density 1.8 g/cm³ be y gram

Applying

Density (D) = mass(m)/Volume (V)

Volume (V) = mass(m)/Density(D)

V = m/D........................... Equation 1

From the question,

x+y = 400...................... Equation 1

Volume of the liquidis

V = 400/1.6 = 250 cm³

(x/1.2)+(y/1.8) = 250

(1.8x/1.2)+y = 450............... Equation 1

Solving both equation simultaneously,

Subtract equation 1 from equation 2

x-(1.8x/1.2)+(y-y) = 400-450

x-1.5x = -50

-0.5x = -50

x = -50/-0.5

x = 100 g.

Hence the mass of the liquid of density 1.2 g/cm³ is 100 g

Answer:

500Km

Explanation:

This question is an example of speed, distance, time.

The formula for working out the distance is: \(Speed*Time\)

To work this out you would need to multiply the speed of 200Km/h by the time of 2.5 hours, this gives you 500 Km. This is because the formula to work out the distance is speed * time.

In adittion, if the train is traveling at 200km per hour then that means that over the course of an hour the distance travelled would be 200Km. So, by multiplying the speed by the time you are working out how far it travelled in that given time.

1) Multiply 200 by 2.5.

\(200*2.5=500Km\)

The kangaroo's horizontal speed will be 9.7 m/s and its departure speed will indeed be 10.65 m/s.

By observing the pace at which this compressed region moves through the medium, we may determine the sound speed. The sound wave travels at a speed of around 343 meters per second in low humidity at 20 degrees Celsius.

The following equation relates the distance to the direction and initial velocity:

d = [v₀²sin2θ]/g, where θ – the angle of the jump.

Thus, v₀² = gd / (sin2θ) = (9.8×8)/0.69 = 113.62

v₀ = 10.65 m/s ( the take off speed).

The horizontal velocity equals:

vₓ = v₀cos 22° = 10.65 m/s × 0.92 = 9.7 m/s

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0.2417 meters is the linear diameter of the object.

The linear diameter (in meters) of an object that has an angular diameter of 10 arcseconds and a distance of 50,000 meters can be calculated using the formula below:

Linear diameter = (angular diameter/206265) x distance

Given that the angular diameter is 10 arcseconds and the distance is 50,000 meters, we can substitute these values in the formula above to get the linear diameter:

Linear diameter = (10/206265) x 50000= 0.2417 meters

Therefore, the linear diameter of the object is 0.2417 meters.

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A chemical reaction between the metals and the electrolyte frees more electrons in one metal than it does in the other.

What is A chemical reaction ?

One set of chemical substances can change into another through a process known as a chemical reaction.

The metal that frees more electrons develops a positive charge, and the other metal develops a negative charge.

Electrical energy is kept in batteries. More work can be accomplished the more energy is saved. On the other hand, power refers to how swiftly energy may be put to use. You can compare energy to water by visualizing it behind a hydroelectric plant's dam.

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Answer:

D

Explanation:

Interference is the interaction between waves that meet.

The wavelength of the electromagnetic wave produced by a cell phone with a frequency of 900 MHz is approximately 0.33 meters (or 33 centimeters).

The relationship between wavelength (λ), frequency (f), and the speed of light (c) can be expressed as λ = c/f. In this case, the frequency is given as 900 MHz, which is equivalent to 900 × 10⁶ Hz. The speed of light (c) is approximately 3 × 10⁸ meters per second.

Substituting the values into the equation, we get λ = (3 × 10⁸ m/s) / (900 × 10⁶ Hz), which simplifies to λ ≈ 0.33 meters (or 33 centimeters).

Therefore, the wavelength of the electromagnetic wave produced by the cell phone is approximately 0.33 meters, corresponding to the frequency of 900 mhz.

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Answer: a

Explanation: :)