Information about conservation of energy

The average velocity of the car for the entire trip is 0.018 km/h.

The velocity of the trip is determined from the ratio of change of displacement to total time of motion.

The total displacement of the motion = ( 30 m North -  30 m South) + 40 m est = 40 m west = 0.04 km west

The total time of motion = 2.22 hours

The average velocity of the car for the entire trip is calculated as follows;

v = ( 0.04 km ) / ( 2.22 hrs )

v = 0.018 km/h

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Answer:

1500 N

Explanation:

• Initial velocity, u = 12 m/s

• Final velocity, v = 20 m/s

• Time taken, t = 6.4 s

• Mass, m = 1200 kg

\(\longrightarrow\) F = ma

a = (v – u)/t, so

\(\longrightarrow\) F = 1200 × (20 – 12)/6.4

\(\longrightarrow\) F = 1200 × 8/6.4

\(\longrightarrow\) F = 1200 × 80/64

\(\longrightarrow\) F = 1200 × 40/32

\(\longrightarrow\) F = 1200 × 20/16

\(\longrightarrow\) F = 300 × 20/4

\(\longrightarrow\) F = 300 × 5

\(\longrightarrow\) F = 1500 N (Answer)

Answer:

sunlight

Explanation:

Answer:

Solar-powered photovoltaic (PV) panels convert the sun's rays into electricity by exciting electrons in silicon cells using the photons of light from the sun. This electricity can then be used to supply renewable energy to your home or business.

Explanation:

photovoltaic cell

A photovoltaic cell, commonly called a solar cell or PV, is the technology used to convert solar energy directly into electrical power. A photovoltaic cell is a nonmechanical device usually made from silicon alloys.

Answer:

1. speed is the distance travelled by an object in unit time

2. velocity is the displacement of a body in in unit time

3. formula of speed =total distance (d)÷ total elapsed time

The mass of the silver is 289.275 x 10³ kg.

If you tried to smuggle silver ingots by completely filling a tote bag, whose dimensions are 50 cm x 29 cm x 19 cm, the density of silver is 10.5 x 10³ kg/m³

What would its mass be?

The formula for density is d = M/V

d = density (ρ)

M = mass (kg)

V = volume  (cm³)

First determine the volume

V =  Length x Width x Height

= 50 cm x 29 cm x 19 cm

= 27.550 cm³

The formula for density is d = M/V

So, the mass (M) is:

d x V

= 10.5 x 10³ kg/m³ x 27.550 cm³

= 289.275 x 10³ kg

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Answer:

A constant velocity of an object ensures that the rate of change of velocity with time is null, and hence, the acceleration of the object is zero. A constant acceleration of an object ensures that the velocity of the object is changing continuously with time, and the velocity will not be constant.

Explanation:

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The z-component of the electric field (in n/c) at the point ( 4.00, -1.00, 5.00 ) meters can be found by taking the negative gradient of the electric potential in the z-direction.

The electric field is defined as E=-∇V, so the z-component of the electric field is equal to -∂V/∂z. By taking the partial derivative of the electric potential in the z-direction, we can find the z-component of the electric field at the point ( 4.00, -1.00, 5.00 ) meters.

In order to determine the electric field in a region, we must first know the electric potential. The electric potential is a measure of the potential energy per unit charge of a particle in an electric field. It is determined by a mathematical equation based on the charges and distances of the particles.

Once the electric potential is known, the electric field can be determined by taking the negative gradient of the electric potential. This allows us to find the components of the electric field at any point in the region.

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Answer:

what to do with that, I can't answer it

Answer:

See below

Explanation:

Distance traveled = 15 + 30 = 45 km

Displacement (use Pythag theorem)

    15^2 + 30^2 = d^2      d = sqrt (1125) = 33.5 km

Answer:

8.40 is your answer.

Explanation:

The average power  she produces in a day be   97.22 Watts.

The quantity of energy moved or converted per unit of time is known as power in physics. The watt, or one joule per second, is the unit of power in the International System of Units. Power is also referred to as activity in ancient writings. A scalar quantity is power.

Marcia consumes total amount of energy per day = 2000 calories = 8.4 × 10⁶ joule.

1 day = 24 × 60 × 60 second = 86400 second

So, average power  she produces in a day = energy/time

=  8.4 × 10⁶ joule/86400 second

= 97.22 Watts

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As the diameter of the wire approaches to zero, the resisitance approaches  infinity.

Electrical resistance is the physical capacity of any body to oppose the flow of electric current even when there is an applied potential difference, capacity calculated by Ohm's First Law, and, according to the International System of Units (IS), is measured in ohms.

With that being said, and knonwing that:

R = Resistance; p = Resistivity; L = Length; d = Diameter

It is possible to calculate the resistance of the wire by:

\(R = p\frac{L}{A}\)

Where A is calculated by:

\(A = \frac{\pi d^{2} }{4}\)

Changing in the first formula:

\(R = p\frac{L}{\pi d^{2} } \\\\R = p\frac{4L}{\pi d^{2} }\)

Knowing that when the diameter tends to zero resistance tends to infinity, it is possible to say that resistance of the wire will tend to infinity when the diameter approaches zero.

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Answer:

The resistance approaches infinity.

Explanation:

100% Correct

Explanation:

Accordibg to Hooke's law ,

F=-kx

the minus sign indicates that the force exerted by the spring is opposite to that of extension and the relation between force and extension is a linear one so in the graph it wll pass through the origin and x=0 F=0 and the k (spring constant) will be a constant

Answer:

Explanation:

Traumatic fractures (also called acute fractures) are caused by a direct blow or impact, such as seriously stubbing your toe. Traumatic fractures can be displaced or nondisplaced. If the fracture is displaced, the bone is broken in such a way that it has changed in position (malpositioned).

Answer:

Traumatic fractures can be displaced or nondisplaced.

Explanation:

Answer:

Explanation:

Swimming. When you go swimming, your body floats but somewhat sinks as well because we weigh less when we're in the water. We are less dense.

Or taking a bath, the soap sinks to the bottom and the washcloth somewhat floats and sinks because of the air trapped in the middle. But the rest of the washcloth is sinking because it's absorbed the water which makes it denser.

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The scale of data measurement that is appropriate for the names of companies listed on the Dow Jones Industrial Average is nominal scale.

This is because the names of companies listed on the Dow Jones Industrial Average are just labels that have no intrinsic value or numerical representation. Therefore, it would not be appropriate to assign a numerical value to the names of these companies.The nominal scale is the most basic level of measurement in statistics. It is used to categorize data into distinct categories or labels. The categories are mutually exclusive, meaning that each data point can only belong to one category at a time. Examples of nominal scale data include gender, eye color, and political affiliation.

Nominal scale of data measurement is appropriate for the names of companies listed on the Dow Jones Industrial Average. The names of the companies are merely labels with no numerical representation or intrinsic value. Thus, it is not appropriate to assign numerical values to the company names. The nominal scale is the most fundamental scale of measurement in statistics. It is utilized to categorize data into distinct categories or labels. Each data point can only belong to one category at a time since the categories are mutually exclusive. Political affiliation, eye color, and gender are some examples of nominal scale data.

The scale of data measurement that is appropriate for the names of companies listed on the Dow Jones Industrial Average is nominal scale. This is due to the fact that nominal scale data is the most basic level of measurement in statistics. The nominal scale is used to categorize data into distinct categories or labels.

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The energy output from active galactic nuclei is much greater than the energy output from normal galaxies, often by several orders of magnitude. Active galactic nuclei (AGNs) are powered by the accretion of  matter onto a supermassive black hole at the center of the galaxy.

This process releases enormous amounts of energy in the form of radiation and outflows of material, such as jets of highly energized particles that can extend thousands of light-years from the black hole. In contrast, normal galaxies are powered primarily by the nuclear fusion reactions that take place in their stars. The energy output from AGNs can be so great that it can significantly affect the surrounding environment and even influence the evolution of the galaxy itself. For example, the intense radiation from an AGN can ionize gas in the galaxy, creating regions of hot, glowing gas known as emission nebulae. The outflows of material from an AGN can also help to regulate star formation in the galaxy by heating or expelling gas from the interstellar medium.

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Explanation:

20÷250 =12.5 and do it by using fourmulaes

Answer:

a=40Km/hr^2

Explanation:

Answer:

Let's see the forces in the cup:

The gravitational force will act in the plane parallel to the inclined surface.

Because the surface is not smooth, we will have a friction force, which direction is opposite to the velocity vector.

The component of the gravitational force perpendicular to the surface is canceled with the normal force, so we will not have that in our diagram.

The correct option is not shown, so i will draw a simple sketch so you can identify the correct option:

Where the direction of the velocity is shown so we can know the direction of the friction force,

And we assume that both forces are applied on the center of mass, this is an oversimplified case, but this is the approach we usually take in this type of problems.

Answer:

For me it was B.    Fn is going to the NW.  Ff is going NE. Fg is going straight down.

Explanation:

The length of time (in seconds) that the train blocks the crossing are 29.15 s.

Velocity is defined as the trade in position or displacement (∆x) divided by the time durations (∆t) wherein the displacement takes place. The common velocity can be effective or negative depending upon the sign of the displacement. The SI unit of average velocity is meters per second (m/s or ms-1).

Average velocity is calculated by means of dividing your displacement (a vector pointing out of your initial role in your final position) through the entire time; the average pace is calculated by way of dividing the overall distance you traveled by means of the total time.

Calculation:-

the average velocity =(82.4+16.4)/2

                             =49.4 km/h

the distance travelled =length of the train =400 m=0.4km

 time taken =distance /average speed

                =0.4/49.4

                 =0.00809 h

                  =29.15 s

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To model time-variant data, one must create a new entity in an m:n relationship with the original entity, is a False statement.

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Answer:

2.67 × 10⁻⁸ N

Explanation:

In order to find the gravitational force between two objects whose masses are known, we have to use the following formula:

\(\boxed{F = G\frac{\ m_1m_2}{r^2}}\),

where:

• F ⇒ force

• G ⇒ universal gravitational constant = 6.67 × 10⁻¹¹ m³ kg⁻¹ s⁻²

• m₁, m₂ ⇒ masses of the two objects = 1000 kg

• r ⇒ distance between the objects

Therefore, if we use the formula and information from above, we get:

F = \(6.67 \times 10^{-11} \times \frac{1000 \times 1000}{(50)^2}\)

    = 2.67 × 10⁻⁸ N

The amount of energy used to heat a home can be measured in different units depending on the system of measurement used.

In the International System of Units (SI), the unit of energy is the joule (J). However, for practical purposes, other units are commonly used to measure energy consumption in heating systems, such as:

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Answer:

C. The net force acting on it.

In a fire piston, the temperature of the gas inside the piston increases due to adiabatic compression.

In physics, pressure is a measure of the force per unit area that a fluid (liquid or gas) exerts on its surroundings. It is defined as the force F acting perpendicular to a surface divided by the area A over which the force is distributed: pressure = F/A. The SI unit of pressure is the Pascal (Pa), which is defined as one Newton per square meter (N/m²). Other common units of pressure include pounds per square inch (psi), atmospheres (atm), and bar (bar). Pressure is an important concept in many areas of physics, including fluid mechanics, thermodynamics, and atmospheric science. It describes the behavior of fluids in pipes and channels, the operation of hydraulic systems, and the behavior of gases in sealed containers. The pressure of a fluid is related to its density and temperature, and can be influenced by factors such as gravity, elevation, and the motion of the fluid itself.

Here,

When the piston is rapidly pushed down into the cylinder, it compresses the gas inside the cylinder. This rapid compression causes the gas molecules to collide with each other more frequently and with greater force, which in turn increases the temperature of the gas.

Because the compression is adiabatic (i.e., no heat is allowed to enter or leave the system), the increase in temperature is due solely to the work done on the gas by the piston. This increase in temperature is known as adiabatic heating.

The fire piston is a simple but effective tool for starting a fire in the wilderness, and it demonstrates the principles of adiabatic compression and the relationship between pressure, volume, and temperature in a gas.

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Answer:

extrusive igneous rock

Explanation:

Answer:  The speed of wave is 2m/s.

Explanation:

The speed of wave equals to the distance/time. So when we divide 4m and 2s, we get that the speed of wave is 2m/s

Answer:

2.33 kg

Explanation:

Momentum = p = mv

p-bowling ball before it hits the pin = (7 kg)(5 m/s) = 35 kg·m/s

Half of this p transfers to the pin after the hit:  35 kg·m/s / 2 = 17.5 kg·m/s

p-pin = 17.5 kg·m/s = m(7.5 m/s)

m-pin = (17.5 kg·m/s) / (7.5 m/s) = 2.33 kg

The maximum value, yM, of the object's displacement during its motion is 3 centimeters.

m = 6 grams = 0.006 kg (mass of the object)

k = 4 grams per second squared = 0.004 kg/s² (spring constant)

y(0) = 3 centimeters = 0.03 meters (initial displacement)

v(0) = 2 centimeters per second = 0.02meters per second (initial velocity)

We can determine the amplitude (A) by using the initial displacement:

A = |y(0)| = 0.03 meters

Next, we need to calculate the angular frequency (ω):

ω = √(k/m) = √(0.004 / 0.006) ≈ 0.04082 rad/s

To find the phase constant (φ), we can use the initial displacement and velocity:

v(t) = dy(t)/dt = -A * ω * sin(ωt + φ)

At t = 0:

v(0) = -A * ω * sin(φ)

0.02 = -0.03 * 0.04082 * sin(φ)

sin(φ) ≈ -0.01542

Since the object is displaced downwards (y(0) > 0), we can determine the phase constant as follows:

φ = -arcsin(sin(φ)) ≈ -arcsin(-0.01542) ≈ -0.01542 rad

Now we can find the maximum displacement (yM) by substituting the values into the equation:

yM = A = 0.03 meters

yM= A = 3 cm.

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