why are elements important

Explanation:

but where's the options?

Answer:

The physical quantities are the quantities that are the base quantities of the measurement. They are known as the fundamental quantities. The units of those units are known as the fundamental units. The derived physical quantities are dependent on the fundamental quantities.

The displacement covered will be 9.85 km

The distance covered will be = 10 + 4 + 1 = 15 km

using Pythagoras theorem

\(H^{2} = P^{2} + B^{2}\)

H  = \(\sqrt{4^{2} + 9^{2} }\)

H  = \(\sqrt{97}\)

H   = 9.85 km

The displacement covered will be 9.85 km

The distance covered will be = 10 + 4 + 1 = 15 km

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The relative density of the metal that is on a spiral spring which extends 9.4 cm in air and 3.5 cm in water is 1.59

RD = Weight of body in air / Upthrust

RD = Relative density

F = - k x

F = Spring force

k = Spring constant

x = Displacement

RD = - k ( 9.4 ) / - k ( 9.4 - 3.5 )

RD = 9.4 / 5.9

RD = 1.59

Relative density is the ratio of density of the substance to the density of the reference material. Density is the ratio of mass to volume. The unit of density is kg / m³. Relative density has no unit since it is density divided by density.

Therefore, the relative density of the metal​ is 1.59

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Answer:

Conservation of Energy: Like all things, Stirling Engines follow the conservation of energy principle (all the energy input is accounted for in the output in one form or another). ... The hot one supplies all of the energy QH, while the cold one removes energy QC (a necessary part of the cycle).

Explanation:

Answer: Yes

Explanation: All the energy input is accounted for in the output in one form or another

Answer:

Explanation:

given:

distance = 270 km

speed = 85 km/h

find:

how long does it take to get into his audition in hours?

solution:

velocity = distance / time

85 km/h =  270 km  

                      t

85 (t) = 270

t = 270 / 85

t = 3.176 hours

Answer:

un café y a seguir pensando porque no se la respuesta xd

The distance between the glass to have the given heat loss is 2.54 m.

The given parameters:

The area of the glass window is calculated as follows;

\(A = 0.6 \times 0.9\\\\A = 0.54 \ m^2\)

The distance between the glass is calculated as follows;

\(Q = \frac{KA \Delta T}{\Delta x} \\\\\Delta x = \frac{kA \Delta T}{Q} \\\\\Delta x = \frac{0.8 \times 0.54 \times 24 }{4.09} \\\\\Delta x = 2.54 \ m\)

Thus, the distance between the glass to have the given heat loss is 2.54 m.

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The change in internal energy, ΔE(AB) is 7.14 kJ.

Since, the ideal gas goes through a cycle of processes, the total change in internal energy will be zero.

ΔE = ΔE(AB) + ΔE(BC) + ΔE(CD) + ΔE(DA) = 0

So,

ΔE(AB) = -ΔE(BC) - ΔE(CD) - ΔE(DA)

​

We know that the process CD s an isothermal process.

So, the change in internal energy, ΔE(CD) = 0

According to the first law of thermodynamics,

ΔE = Q + W

Therefore, the change in internal energy,

ΔE(AB) = -[Q(BC) + W(BC)] - [Q(DA) + W(DA)]

ΔE(AB) = -[Q(BC) + P(B)ΔV(BC)] - [Q(DA) - P(D)ΔV(DA)]

ΔE(AB) = -(100 + 0.31 x3) - (-150 - 1 x -1)

ΔE(AB) = -100 - 0.93 + 150 + 1

ΔE(AB) = 50 + (0.07 x 1.013 x 10⁵)

ΔE(AB) = 50 + 7091

ΔE(AB) = 7.14 kJ

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Answer:

d. an object immersed in a fluid is buoyed up by a force equal to the weight of the displaced fluid.

Answer:

I believe that the answer is Kurt.

Explanation:

When you kick a ball, you are giving it momentum and a speed increase.

Answer:

The answer is "\(4,500 - 225 \ V\)".

Explanation:

Using formula for calculating the Voltage:

\(M_1=12.5\\\\M_2=250\\\\V_1=4,500 \\\\\bold{\text{Formula: }}\\\\\to \bold{\frac{m_1}{m_2}=\frac{V_2}{V_1}}\\\\\to \frac{12.5}{250}=\frac{V_2}{4,500}\\\\\to 0.05=\frac{v_2}{4,500}\\\\\to 0.05\times 4,500= V_2\\\\\to V_2=225\\\\\)

Hence the range of accelerating in voltage is \(4,500 - 225 \ V\)

Energy is that which has the ability to cause change in matter.

Energy is the quantitative property that is transferred to a body or to a physical system, recognizable in the performance of work and in the form of heat and light. Energy is a conserved quantity—the law of conservation of energy states that energy can be converted in form, but not created or destroyed.

So in simple definition we can say that energy is that which has the ability to cause change in matter.

Based on the given statements we can classify them as;

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Draw lines from each point of the area of convergence to the point of convergence and extend them until they intersect.

To draw the lines of convergence and the area of convergence, first draw the line that divides the area into two parts. Then draw the lines that connect the points where the opposing forces meet. Finally, draw a circle around the area of convergence, with the convergence lines drawn from its center to the edges.

Convergence lines:

1. The line that divides the area of convergence into two parts.

2. The line that connects the points where opposing forces meet.

Area of convergence:

The area of convergence is the area where the opposing forces meet and interact. This area can be visualized as a circle, with the convergence lines drawn from its center to the edges. The area of convergence is often characterized by a high level of activity, with the opposing forces keeping each other in check.

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This question involves the concepts of heat capacity, temperature, and heat.

The heat absorbed by ethanol is "1228 cal".

The heat capacity of a substance is defined as the amount of heat absorbed by a unit amount of that substance for a degree rise in temperature. Mathematically,

\(Q = mc\Delta T\)

where,

Therefore,

Q = (50 g)(0.614 cal/g°C)(40° C)

Q = 1228 cal

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Answer:

HERE IS YOUR ANSWER

Physical quantity => Unit

1)Length=>metre

2)Time=>second

3)Temperature=>Kelvin

4)mass=>kilogram

5)electric current=>ampere

6)luminous intensity=>candela

7)amount of substance=>mole

8)velocity=>m/s

9)acceleration=>m/s²

10)momentum=>kgm/s

11)density=>kg/m³

12)volume=>m³

13)force=>Newton(N)

14)Energy=>Joule(J)

15)Power=>Watt(W)

16)Pressure=>Pascal(Pa) or N/m²

17)Resistance=>ohm

18)Electrical potential=>volt(V)

19)plane angle=>radian

20)solid angle=>steradian

Explanation:

Physical quantity:-units

Answer:

Should be -39.2 N

Explanation:

w=mg

w=4 x -9.8 m/s2

= -39.2 N

Answer:

The velocity is \(v = 4.76 \ m/s\)

Explanation:

From the question we are told that

   The first distance is   \(d_1 = 4.0 \ km = 4000 \ m\)

   The  first speed  is  \(v_1 = 5.0 \ m/s\)

    The  second distance is  \(d_2 = 1.0 \ km = 1000 \ m\)

    The  second speed  is  \(v_2 = 4.0 \ m/s\)

Generally the time taken for first distance is  

      \(t_1 = \frac{d_1 }{v_1 }\)

        \(t_1 = \frac{4000}{5}\)

       \(t_1 = 800 \ s\)

The time taken for second  distance is

           \(t_1 = \frac{d_2 }{v_2 }\)

        \(t_1 = \frac{1000}{4}\)

       \(t_1 = 250 \ s\)

The total time is mathematically represented as

     \(t = t_1 + t_2\)

=>   \(t = 800 + 250\)

=>    \(t = 1050 \ s\)

Generally the constant velocity that would let her finish at the same time is mathematically represented as

      \(v = \frac{d_1 + d_2}{t }\)

=>    \(v = \frac{4000 + 1000}{1050 }\)

=>    \(v = 4.76 \ m/s\)

The constant speed that will let her finish in the same time as in the first race is 4.76 m/s

Time 1 = distance / speed

Time 1 = 4000 / 5

Time 1 = 800 s

Time 2 = distance / speed

Time 2 = 1000 / 4

Time 2 = 250 s

Constant speed = Total distance / total time

Constant speed = 5000 / 1050

Constant speed = 4.76 m/s

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The name of the SI unit for magnetic field strength is Tesla. Magnetic fields are formed by moving electric charges.

Magnetic field strength alludes to an actual amount that is utilized as one of the essential proportions of the power of the attractive field.

The SI unit of attractive field is tesla (T). 1 Tesla is defined as the magnetic field that carries 1C charge at the speed of 1m/s which is perpendicular to the force of 1 N.

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The output mechanical power (in W) of the lift station is and efficiency of electric motor continuously operating with average power 3.70 kW runs the pump is 135475.2x10^3J. and efficiency is 0.065%

Given density of orange juice (ρ) = 1.25g/ml

Height of juice level (h) = 5.76m

rate of juice increases (r) = 1920000 lts/day

Through equal-diameter pipes, the liquid travels through the pumping station at the same speed as it does when leaving.

Average power = 3.70 kW = 3.7x10^3W

Time = 24h

Work done (W1) = Power x time taken = 3.70x10^3 x 24 = 88.8x10^3J

This is the difference in potential energies: the effort required to move water to a height. W2 = E1-E0  where E0 =0and E1 = mgh

m = density x volume = 1.25x10^3x1920m^3 = 2400x10^3kg

E1 = 2400x10^3x9.8x5.76 = 135475.2x10^3J

Work done (W2) = 135475.2x10^3J

efficiency = W1/W2 = 88.8x10^3/135475.2x10^3 = 0.00065 = 0.065%

Hence efficiency = 0.065%

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Answer:

The "butterfly Effect"

Explanation:

The "butterfly effect" will probably have big changes in the future.

By Newton's second law, the car has mass m so that the net force is

∑ F = ma

Find the acceleration a of the car. Since the force is constant, acceleration is also constant. If the car accelerates from rest to 3 m/s in 1.2 s, then its acceleration is

a = (3 m/s - 0) / (1.2 s) = 2.5 m/s²

Then the mass of the car m is such that

7.8 N = m (2.5 m/s²)

Solve for m :

m = (7.8 N) / (2.5 m/s²) = 3.12 kg

Answer:

it's the second one;

if the frequency increases, wavelength decreases

Explanation:

we know, v=f×lamda(wave length)

so for constant velocity Frequency f is inversely proportional to lamda

i.e.

fα 1/lamda

so as the f increases lamda decreases and vise versa

A true relationship between the various wave components is if frequency increases, wavelength decreases.

The frequency is the reciprocal of the time period of the wave.

The wavelength is the distance between the two adjacent crest of the wave.

If the wavelength decreases, the number of cycles will increase in a certain time.

Hence, a true relationship between the wave components is if frequency increases, wavelength decreases.

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The relationship between total energy, kinetic energy, and potential energy can be described as follows:

Kinetic energy is the energy an object has due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.

Kinetic energy is directly proportional to the mass of the object and to the square of its velocity: KE = 1/2 mv2. Kinetic energy is a property of a moving object or particle and depends not only on its motion but also on its mass. The higher the mass and the faster the object or particle is moving, the greater its kinetic energy will be.

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Answer:

Materials that can lose or gain electrons in this way are called triboelectric, according to Northwestern University. One common example of this would be shuffling your feet across carpet, particularly in low humidity which makes the air less conductive and increases the effect.

Explanation:

Hope that helps :)

The amount of load lifted by the pulley when the efficiency is 60% and effort is 50 N is determined as 30 N.

The amount of load lifted by the pulley is calculated by applying the formula for efficiency of a machine as follows;

E = L / E   x  100%

where;

The amount of load lifted by the pulley is calculated as;

60 = L / 50   x 100%

60 = 100L / 50

100L = 50 x 60

100 L = 3000

L = 3000 / 100

L = 30 N

Thus, the amount of load lifted by the pulley is 30 N.

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