A 10 kg ball is released from the top of a hill. How fast
is the ball going when it reaches the base of the hill?
Approximate g as 10 m/s2 and round the answer to the
nearest tenth.
m/s
hy = 2 m
h = 0.5 m

Answer:

Because Rod protect house from burning down and people from electrocution.

Answer:

Without a specific figure 27.11 provided, I cannot refer to it directly. However, I can provide general information on how to rank the resistances of wires made of the same material.

The resistance of a wire is given by the formula R = (ρL)/A, where ρ is the resistivity of the material, L is the length of the wire, and A is the cross-sectional area of the wire.

To rank the resistances of wires made of the same material, we need to compare the values of (ρL)/A for each wire.

The wire with the largest resistance will have the smallest cross-sectional area (i.e., the thinnest wire) or the longest length, or both.

The wire with the smallest resistance will have the largest cross-sectional area (i.e., the thickest wire) or the shortest length, or both.

The middle wires will have intermediate resistances, depending on their length and cross-sectional area.

It's worth noting that the resistivity of a material can also depend on temperature, so if the wires are at different temperatures, that can also affect their resistances.

Explanation:

Using the Pascal's principle formula, the force exerted on the second piston is 18000 N.

The force on the second piston is determined using the formula from Pascal's principle.

The formula is given below:

\(\frac{f_{1}}{A_{1}} = \frac{f_{2}}{A_{2}}\)

Solving for the force on the second piston, \({f_{2}\)

\({f_{2} = \frac{A_{2}\times f_{1}}{A_{1}}\)

\({f_{2} = \frac {0.2\times3600}{0.04} = 18000 N\)

In conclusion, the force on the second piston is 18000 N.

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Answer:

Light or visible light is electromagnetic radiation within the portion of the electromagnetic spectrum that is perceived by the human eye. Visible light is usually defined as having wavelengths in the range of 400–700 nanometres, between the infrared and the ultraviolet.

Here are the 7 from shortest to longest wavelength.

Violet - shortest wavelength, around 400-420 nanometers with highest frequency.  

Indigo - 420 - 440 nm.

Blue - 440 - 490 nm.

Green - 490 - 570 nm.

Yellow - 570 - 585 nm.

Orange - 585 - 620 nm.

Red - longest wavelength, at around 620 - 780 nanometers with lowest frequency.

Explanation:

Answer:

The movement of a 2000-kg truck travelling at 19 m/s is 38,000 kgm/s.

The factor of safety for the slope stability analysis needs to be determined for a regolith slope in central California. The parameters provided include regolith cohesion, angle of internal friction, and regolith density. The analysis involves evaluating the stability of the slope under different conditions, such as changes in water depth, angle of internal friction, and slope steepness. Recommendations for the homeowners regarding the safety of their homes and potential remediation measures will also be provided.

To calculate the factor of safety, we need to consider the forces acting on the slope. The driving force is the weight of the regolith, which can be calculated by multiplying the density of the regolith by the volume of the slope. The resisting force is the shear strength of the regolith, which is determined by the cohesion and angle of internal friction. The factor of safety is the ratio of the resisting force to the driving force.

a. To determine the factor of safety, we can use the given parameters and calculate the driving force and resisting force. By dividing the resisting force by the driving force, we can obtain the factor of safety. If the factor of safety is greater than 1, it indicates that the slope is stable. If it is less than 1, the slope is considered potentially unstable.

b. If the water depth increases by 2 m, it adds additional weight to the slope, increasing the driving force. This decrease in the factor of safety suggests a less stable slope compared to the initial scenario.

c. If the angle of internal friction increases by a factor of 2, it enhances the shear strength of the regolith. This increase in the factor of safety indicates a more stable slope.

d. If the slope becomes steeper by a factor of 2, it increases the driving force. This decrease in the factor of safety suggests a less stable slope.

e. Based on the analysis, it is important to advise the homeowners that the slope is currently unstable, considering the factor of safety is less than 1. Remediation measures may include slope stabilization techniques such as installing retaining walls, soil reinforcement, or drainage systems to manage water infiltration and reduce driving forces. It is recommended to consult with a geotechnical engineer to develop a comprehensive slope stability plan for the safety of the home.

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Explanation:

Metal is good conductor of heat due to :

(A) Tightly packed atoms which transfer vibrations quickly to the next atoms.

(B) Free electrons near the heat source gets excited and transfer Kinetic Energy through collisions with atoms and other free electrons.

Answer:

The real answer is C : organize the data in a chart or a table.

Answer:

18900J

Explanation:

energy = Temperature change * Mass * Specific Heat Capacity

3*1.5*4200=18900

=18900J

Answer:

Explanation:

                   Q = mcT

where,

          Q is heat(energy)

          m is mass

           c is specific heat capacity

           T is change in temperature

so,

      Q= 1.5kg x 4200 J/kg.C x 3C

       Q = 18900J of energy

This question is asking for the sensitivity of a force sensor, which is the voltage output (V) perforce input (N). The force sensor provides the following voltage outputs for force inputs from 0 to 5 N: 0.4 N.


To determine the sensitivity of a force sensor in volts per newton, the following formula may be used: Sensitivity = (Vmax - Vmin) / Fmax - FminWhere: Vmax is the maximum voltage output of the sensor. F max is the maximum force input of the sensor. Vmin is the minimum voltage output of the sensor.

Fmin is the minimum force input of the sensor. The question provides a force sensor's voltage output for force inputs ranging from 0 to 5 N, but the values for Vmax, Vmin, Fmax, and Fmin must be determined before using the formula. The question does not provide these values.

However, the sensitivity can be estimated by selecting the values closest to Vmax, Vmin, Fmax, and Fmin in the data provided. Sensitivity = (1.5 V - 0 V) / 5 N - 0 NSensitivity = 0.4 V/NThe sensitivity of the force sensor is 0.4 V/N.

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The natural gas is continuously combusted to sustain the turbine's operation, enabling the continuous generation of electricity.

Generating electricity using a turbine generator that utilizes natural gas as the energy resource involves several steps:

Throughout this process, the natural gas is continuously combusted to sustain the turbine's operation, enabling the continuous generation of electricity.

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The velocity of the boat after both boys jump is -6.46 m/s. The velocity is negative, which means the boat is moving backwards after both of the boys jumps.

Speed is the rate at which an object travels along a path over time, whereas velocity is the speed and direction of an item's motion. In other words, speed is a scalar value, but velocity is a vector.

We can use the principle of conservation of momentum,

In this case, the closed system is the boat and the two boys. Before they jump, the total momentum of the system is the momentum of the boat (mass * velocity). After they jump, the total momentum of the system is the momentum of the boat plus the momentum of Keith plus the momentum of Nate.

The initial momentum of the boat is 100 kg * 3 m/s = 300 kgm/s

The momentum of Keith as he jumps off the boat is 65 kg * 2 m/s = 130 kgm/s

The momentum of Nate as he jumps off the boat is 68 kg * 4 m/s = 272 kg*m/s

The total momentum of the system before the boys jump is 300 kgm/s

The total momentum of the system after the boys jump is 300 kgm/s + 130 kgm/s + 272 kgm/s = 702 kg*m/s

So, we can set the initial momentum equal to the final momentum:

300 kg*m/s = 100 kg * vf + 130 kg * 2 m/s + 272 kg * 4 m/s

where vf is the final velocity of the boat.

Solving for vf,

vf = (702 kgm/s - 130 kg * 2 m/s - 272 kg * 4 m/s) / 100 kg

vf = (702 - 260 - 1088) kgm/s / 100 kg

vf = -646 kg*m/s / 100 kg

vf = -6.46 m/s

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Answer: It is matter

Explanation:

Answer:

D

Explanation:

Trust me, I just did the test. :) :) :)

Answer:

d

Explanation:

Remote sensing - it is the process of detecting the characteristics of an area measuring it's  reflected and emitted radiation at a distance.

IR (Infrared) is the radiation emitted from earth surface in the form of heat.

The wavelength that we use most effective for the remote sensing is of range 3µm - 35µm.

This the longest wavelength used in remote sensing.

wavelength is distance between two crests or to trough.

It is denoted by λ

λ = v/f

where λ  = wavelength

v = velocity

f = frequency

unit of wavelength is meter.

A peak is highest point of wave and valley is the lowest point.

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The air pressure calculated using barometric formula at an elevation of 2000 meters is 0.068 MPa if the air pressure at sea level is 0.1 MPa.

Air pressure =  0.1 MPa

Elevation height = 2000 meters

The barometric formula is used to calculate the air pressure at an elevation of 2000 meters. Here the atmospheric pressure decreases when the elevation increases. The barometric formula is:

P = P₀ * exp(-M * g * h / (R * T))

P = pressure of altitude

P₀ = pressure at sea level

M = molar mass of Earth's atmoshpere = 0.02896 kg/mol

g =  acceleration due to gravity = 9.8 m/s²

h =  altitude height = 2000 m

R = ideal gas constant = 8.314 J/(mol·K)

T =  temperature of the air at a constant.

Substituting the values:

P = 0.1 MPa * exp(-0.02896 kg/mol * 9.8 m/s² * 2000 m / (8.314 J/(mol·K) * T))

T = 293K

P = 0.1 MPa * exp(-0.02896 kg/mol * 9.8 m/s² * 2000 m / (8.314 J/(mol·K) * 293 K))

P = 0.1 MPa * exp(0.2929808 / (8.314 J/(mol·K) * 293 K))

P =  0.1 MPa * exp(0.2929808 / 2436.002))

P  = 0.068 MPa

Therefore, we can conclude that the air pressure at an elevation of 2000 meters is 0.068 MPa.

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Answer:

a.

b.

Explanation:

The change in tire's angular velocity is

Now,

Therefore,

Part B.

The average angular acceleration is given by

Now,

and

Therefore,

which is our answer!

The minimum distance the alpha particle will reach when approaching an aluminum nucleus is approximately 4.52 × 10^-14 meters.

To calculate the minimum distance the alpha particle will reach using energy conservation, we can equate the initial kinetic energy of the particle to the potential energy at the minimum distance.

1. For the case of the gold nucleus:

The initial kinetic energy (K) of the alpha particle is given by:

K = (1/2)mv₀²

The potential energy (U) at the minimum distance can be calculated using Coulomb's law:

U = (k|Q₁Q₂|) / r

Since we want to find the minimum distance, we assume the final velocity of the alpha particle is zero (v = 0) at the minimum distance. Therefore, the final kinetic energy is zero.

By applying the conservation of energy, we can set the initial kinetic energy equal to the potential energy at the minimum distance:

K = U

(1/2)mv₀² = (k|Q₁Q₂|) / r

Solving for r, we get:

r = (k|Q₁Q₂|) / [(1/2)mv₀²]

Substituting the given values:

r = (9 × 10^9 N m²/C²) * |(2e)(79e)| / [(1/2)(6.64 × 10^-27 kg)(10^6 m/s)²]

Calculating the value, we find:

r ≈ 1.16 × 10^-14 meters

Therefore, the minimum distance the alpha particle will reach when approaching a gold nucleus is approximately 1.16 × 10^-14 meters.

2. For the case of aluminum:

To calculate the minimum distance for aluminum, we can use the same equation as before but replace the charge of the gold nucleus with the charge of aluminum.

r_aluminum = (k|Q₁Q₂|) / [(1/2)mv₀²]

Substituting the values for aluminum:

r_aluminum = (9 × 10^9 N m²/C²) * |(2e)(13e)| / [(1/2)(6.64 × 10^-27 kg)(10^6 m/s)²]

Calculating the value, we find:

r_aluminum ≈ 4.52 × 10^-14 meters

The minimum distance changes because the Coulomb force depends on the product of the charges of the interacting particles. As the charge of the aluminum nucleus (Q = +13e) is smaller than the charge of the gold nucleus (Q = +79e), the minimum distance for aluminum is greater than the minimum distance for gold.

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When activated, an emergency locator transmitter (ELT) transmits on 121.5 and 406 MHz.

121.5 MHz was the international standard emergency frequency for aviation until 2009, when its use was discontinued due to its high false alarm rate. However, ELTs are still required to transmit on this frequency as a backup in case the primary frequency, 406 MHz, is not monitored by search and rescue authorities.

406 MHz is the primary frequency used for satellite-based search and rescue operations. When an ELT is activated, it sends a distress signal on this frequency, which is received by satellites in orbit around the Earth. The satellites relay the signal to a ground station, which then alerts search and rescue authorities to the distress signal and the location of the ELT.

In summary, an emergency locator transmitter (ELT) transmits on both 121.5 MHz and 406 MHz when activated, with 406 MHz being the primary frequency used for satellite-based search and rescue operations and 121.5 MHz used as a backup.

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Answer:

\( s = ut + \frac{1}{2} a {t}^{2} \\ u = 0 \\ a = 4.2 \: m {sec}^{ - 2} \\ t = 10sec \\ s = 0 + \frac{1}{2} (4.2) {10}^{2} \\ = 1.2 \times 100 \\\boxed{ s = 120 \: m}\)

The charge deposited by the lightning bolt is 1,500,000 coulombs.

To calculate the charge deposited by the lightning bolt, we can use the formula:

Charge (Q) = Current (I) × Time (t)

Given that the current is 30,000 amps and the time is 50 seconds, we can substitute these values into the equation:

Q = 30,000 amps × 50 seconds

Q = 1,500,000 coulombs

The charge deposited by the lightning bolt can be calculated by multiplying the current (30,000 amps) with the time (50 seconds). Using this formula, we find that the charge deposited is 1,500,000 coulombs.

Coulombs is the unit of electric charge, and it represents the amount of electric charge flowing through a conductor in one second when a current of one ampere is maintained.

In this case, the lightning bolt transferred a total charge of 1,500,000 coulombs during the 50-second duration of the lightning strike.

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Answer:

rhastuutse5r says he n and happiness of

Explanation:

UKDIAMOND is a great place to live and live and live in the world best friend tum jio hjaro and happiness of the day and the day of the day of the day of the day of the day of the day of 2nd century and the day of the day of

Answer:

Isolated

Explanation:

According to the law of conservation of momentum, in a(n) isolated system, the initial total momentum before a collision equals the final total momentum. I just did it on A p e x.

As the pressure on the gas increases, the volume will decrease and the temperature will increase. Thus option c is correct.

A gas that obeys the gas laws regardless of the pressure and temperature is known as an ideal gas. The particles of an ideal gas have no intermolecular forces and have negligible volume.

A model of an ideal gas is shown here. A student designs an experiment to test the impact of increasing the pressure on the system. Which prediction is most likely to be supported by the data?

A) As pressure on the gas increases, the volume and temperature will both decrease.

B) As the pressure on the gas increases, the volume and temperature will also increase.

C) As pressure on the gas increases, the volume will decrease and the temperature will increase.

D) As pressure on the gas increases, the volume will increase and the temperature will decrease.

Here,

The variation of volume and temperature according to the variation in pressure can be obtained from the ideal gas equation,

            PV = nRT

From the equation we can write that,

P ∝ 1/V

P ∝ T

Therefore, the increase in pressure can cause the decrease in volume and increase in temperature.

Hence the correct option is

(c) As the pressure on the gas increases, the volume will decrease and the temperature will increase.

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If you know the total current and  voltage across the circuit, then you can find the total resistance using the Ohm's Law, that is : R = V / I.

In a series-parallel circuit, one can find the total resistance of circuit by calculating resistance of each parallel section and then adding reciprocals of these values to obtain total resistance of parallel section. Next, you can add series resistances to this total resistance to obtain single resistance for entire circuit.

In series the total resistance is equal to the sum of the resistors. In parallel,  inverse of the total resistance is equal to the the sum of the inverse of each individual resistor.

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Note: The question given on the portal is incomplete. Here is the complete question.

Question: How is resistance calculated in a series-parallel circuit?

Answer:

Yes

Explanation:

The wind net force acting on the sail is doing work.   (The 'net' force takes into account the force of friction between the boat hull and the water)

The velocity of the coupled train cars after the collision will depend on the total mass of the system, but it will be less than the velocity of the first train car before the collision.

When the two loaded train cars collide, they will couple together due to the bumping force. In this case, the momentum of the first train car before the collision is (250000 kg) x (0.295 m/s) = 73750 kg m/s in the positive direction. The momentum of the second train car before the collision is (57500 kg) x (-0.12 m/s) = -6900 kg m/s in the negative direction. After the collision, the momentum of the coupled train cars will be conserved. Therefore, the total momentum of the system will be 73750 kg m/s - 6900 kg m/s = 66850 kg m/s in the positive direction. The velocity of the coupled train cars after the collision will depend on the total mass of the system, but it will be less than the velocity of the first train car before the collision.
Train cars couple together through a process called "bumping," where they move toward one another and collide. In this scenario, the first train car has a mass of 250,000 kg and a velocity of 0.295 m/s, while the second train car has a mass of 57,500 kg and a velocity of -0.12 m/s. The negative sign indicates that the second train car is moving in the opposite direction. When the cars collide and couple, their combined mass and velocities determine the new velocity of the coupled train cars according to the conservation of momentum.

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Answer:

Balloons can be filled with air.

Air has mass.

Explanation:

Matter is anything that has mass and can occupy space.

Mass is the quantity of matter within a substance.  Notably, there are three states of matter which are solid, liquid and gas.

So, air is a matter because it has mass and it can be used to fill balloons.

Answer:

Balloons can be filled with air.

Air has mass.