does the speedometer of a car read average speed or instantaneous speed? and how do we know?

Answer:

21.6m

Explanation:

Distance=speed×time

=1.2m/s×18min

=21.6m

Hope this helps u

Answer:

Explanation:

1 minute = 60 seconds

18 minutes = 18 * 60 sec = 1080 seconds

1 second allows 1.2 meters of a step

1080 second = x

1 / 1080 = 1.2 / x          Cross multiply

x = 1.2 * 1080

x = 1296 meters

I live 1296 meters from the school.

Answer:

At 400 m the potential energy of the mountain climber doubled the initial value.

Explanation:

Given;

initial height of the mountain climber = 200 m

final height of the mountain climber, = 400 m

The potential energy of the mountain climber is calculated as;

Potential energy, P.E = mgh

At 200 m, P.E₁ = mg x 200 = 200mg

At 400 m, P.E₂ = mg x 400 = 400mg

Then, at 400 m, P.E₂ = 2 x 200mg = 2 x P.E₁

Therefore, at 400 m the potential energy of the mountain climber doubled the initial value.

Answer:

10N/m

Explanation:

Using F=kx

F=mg

k=mg/x

k=0.1*10/0.1 (kg*m/s^2)/m

10N/m

Answer:

i hope this helps!

Explanation:

Artificial Insemination (AI) is an Assisted Reproductive Technology (ART) used worldwide to deposit stored semen directly into a cow or heifer's uterus. It is a tool for improving reproductive performance and genetic quality of livestock.

source: https://nwdistrict.ifas.ufl.edu/phag/2020/05/29/tips-for-successful-artificial-insemination-of-cattle/

Answer:

The frequency you will hear is 2,639.7 Hz

Explanation:

Given;

source frequency, Fs = 2300 Hz

velocity of the source, Vs = 30 m/s

observed velocity, Vo = 18 m/s

speed of sound in air, V = 343 m/s

Apply Doppler effect, the frequency you will hear is known as observed frequency;

The observed frequency will be greater than the source frequency, since the distance between the source and the observer decreases.

[tex]F_s = F_0(\frac{V- V_0}{V + V_s} )\\\\2300 = F_0 (\frac{343 - 18}{343 + 30} )\\\\2300 = F_0(\frac{325}{373} )\\\\F_0= 2300(\frac{373}{325}) \\\\F_0 = 2,639.7 \ Hz[/tex]

Note: the aim is to increase the observed frequency.

Subtracting the observed speed from the speed of sound for the numerator will ensure an increase in the observed frequency, also adding the source speed to the speed of sound for the denominator will equally ensure an increase in the observed frequency.

Answer:

v=FX

v=34(2.0)

v=68m/s

Answer:

no it will not glow hope help you stay happy

Answer:

Explanation:

Newton's 2nd Law say that F = ma which is the sum of the forces acting on an object is equal to the object's mass times the acceleration at which it is moving. That means that the forces acting on this tree are F which is the Force the man needs to exert to move the tree, and f which is the force the tree is exerting in an effort to stay right where it is. That alters our 2nd Law equation to F - f = ma. BUT if the tree isn't moving, the acceleration is 0, making the whole right side of that equation go to 0. That means that F = f. Phew! Let's do that.

f = μ[tex]F_n[/tex] where f is the frictional force, μ is the coefficient of static friction, and [tex]F_n[/tex] is the weight of the object, which are given as 670 N. Filling in:

f = .5(670) so

f = 335 N (that is not using the rules of significant digits properly, but if you use them properly, the answer is not one of the choices, so...)

C is the one you want.

Answer:

E) 147 V

Explanation:

Ra+Rb+Rc = 14.0

V = IR

V = (10.5)(14.0)

V = 147 V

The potential difference across the source will be c)12V

Ohm's law states that  the current through a conductor between two points is directly proportional to the voltage across the two points .

since , R(A) , R(B) AND R(C) are in parallel combination , hence  equivalent

resistance of the circuit will be

1/R = 1/R(A) + 1/ R(B) + 1/ R(C)

1/R= 1/2 + 1/4 +1/8

1/R = 7/8

R = 8/7 ohm

from ohm's law

Voltage = current * resistance

V( source ) = current (in circuit ) * R (equivalent resistance)

V = 10.5 * (8/7)

V = 12 V

The potential difference across the source will be c) 12V

learn more about ohm's law :

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Answer:

2,250N

Explanation:

Force = mass * acceleration due to gravity

force= 1500 * 1.5

force =2250N

Answer:

Explanation:

Initial velocity is 0. In the equation v = v0+at where v0 is the initial velocity of 0, we only have to fill in -9.8 for a and 2 for t to get the velocity after 2 seconds -19.6 m/s; after 5 seconds, when it hits the ground, a = -9.8 and t = 5 to give a velocity of -49 m/s. Gravity pulls down everything at the same rate, it doesn't matter whether we drop a feather or an elephant from the window!

Answer:

The answer is below

Explanation:

A diver works in the sea on a day when the atmospheric pressure is 101 kPa. The diver uses compressed air to breathe under water. 1700 litres of air from the atmosphere is compressed into a 12-litre gas cylinder. The compressed air quickly cools to its original temperature. Calculate the pressure of the air in the cylinder.

Solution:

Boyles law states that the volume of a given gas is inversely proportional to the pressure exerted by the gas, provided that the temperature is constant.

That is:

P ∝ 1/V;   PV = constant

P₁V₁ = P₂V₂

Given that P₁ = initial pressure = 101 kPa, V₁ = initial volume = 1700 L, P₂ = cylinder pressure, V₂ = cylinder volume = 12 L. Hence:

P₁V₁ = P₂V₂

100 kPa * 1700 L = P₂ * 12 L

P₂ = (100 kPa * 1700 L) / 12 L

P₂ = 14308 kPa

Answer: Concave lens makes the virtual image. So the image distance turns to be negative which also cause the magnification to be negative.

Answer:

98.13m

Explanation:

Complete question

Daniel is 50.0 meters away from a building. Tip of the building makes an angle of 63.0° with the horizontal. What is the height of the building

CHECK THE ATTACHMENT

From the figure, using trigonometry

Tan(θ ) = opposite/adjacent

Where Angle (θ )= 63°

Opposite= X = height of the building

Adjacent= 50 m

Then substitute the values we have

Tan(63)= X/50

1.9626= X/50

X= 1.9626 × 50

X= 98.13m

Hence, the height of the building is 98.13m

Answer:

will be doubled

Explanation:

This is because when a dielectric material is inserted between the plates of capacitors the capacitance increases to

c = ke Co .

where ke is called the dielectric constant and Co is the capacitance without a dielectric material

The reactants have a higher potential energy and energy is released.

The potential energy graph shows a plot of the progress of a reaction. The hump on the graph is the activation energy of the reaction.

The statement that best describes the  total energy change of the system is that; reactants have a higher potential energy and energy is released.

Learn more about potential energy of a reaction:https://brainly.com/question/15371310

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Answer:

The depth to which the hydrometer sinks is approximately 24.07 cm

Explanation:

The given parameters are;

The diameter of the hydrometer tube, d = 2.3 cm

The mass of the content of the tube, m = 80 g

The density of the liquid in which the tube floats, ρ = 800 kg/m³

By Archimedes' principle, the up thrust (buoyancy) force acting on the hydrometer = The weight of the displaced liquid

When the hydrometer floats, the up-thrust is equal to the weight of the hydrometer which by Archimedes' principle, is equal to the weight of the volume of the liquid displaced by the hydrometer

Therefore;

The weight of the liquid displaced = The weight of the hydrometer, W = m·g

Where;

g = The acceleration due to gravity ≈ 9.81 m/s²

∴ W = 80 g × g

The volume of the liquid that has a mass of 80 g (0.08 kg), V = m/ρ

V = 0.08 kg/(800 kg/m³) = 0.0001 m³ = 0.0001 m³ × 1 × 10⁶ cm³/m³ = 100 cm³

The volume of the liquid displaced = 100 cm³ = The volume of the hydrometer submerged, [tex]V_h[/tex]

[tex]V_h[/tex] = A × h

Where;

A = The cross-sectional area of the tube = π·d²/4

h = The depth to which the hydrometer sinks

h = [tex]V_h[/tex]/A

∴ h = 100 cm³/( π × 2.3²/4 cm²) ≈ 24.07 cm

The depth to which the tube sinks, h ≈ 24.07 cm.

D) There will be less available for other living things.

There will be less available for other living things is the most likely effect on the amount of water and is denoted as option D.

This is a compound which is regarded as a universal solvent and can be found in rivers, streams etc.

People moving into and living in the area means water will be used which will make it less available for other living things.

Read more about Water here https://brainly.com/question/5060579

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Answer:

A bar chart is orientated horizontally, whereas a column chart is arranged vertically. Sometimes “bar chart” refers to both forms. These types of charts are usually used for comparison purposes (unlike line charts, which describe change).

Answer:

Newton's laws of motion relate an object's motion to the forces acting on it.Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force.

Explanation:

Answer:

It depends if your smart

Explanation:

Also, I plead the 5th

Answer:

B.

Explanation:

B. is correct because every time usually when a hurricane hits it causes flooding causing multiple homes to be ruined. It is a known fact that usually hurricanes start close or in along with tornadoes, the water, meaning once they hit land they have some water to flood that land with.

C. is absolutely false hurricanes have VERY strong wind gusts.

D. is absolutely wrong they do alter landscapes by ripping trees and plants and houses out of the ground making the landscapes look different.

A. is wrong they tend to deposit and remove sediment evenly.

~ LadyBrain

Answer:

B

Explanation:

Answer:

Iron has a higher heat capacity than copper

Explanation:

The heat capacity of a substance is defined as the amount of heat required to raise the temperature of an object by 1°C.

The higher the heat capacity of a substance, the longer the time it takes for the substance to become hot when heated.

Since the copper rod becomes too hot to hold much sooner than the iron rod, it means that iron has a higher heat capacity than copper.

Answer:

¿Qué sistemas? ¿Hubo otra parte de la pregunta que quizás hayas olvidado hacer?

Explanation:

In english:

(question) In the systems listed below, indicate where you think the energy they use comes from and clarify whether they only use or can accumulate

(answer) What systems? Was there another part of the question you might've forgotten to put?

Answer:

The electromagnetic spectrum comprise a lot of waves length. Usually, different waves length are called as different lights, and a light source can emit in more than a different wave length, as the sun does, for example. The sun emit the visible light, UV light, infrared, etc.

Answer:

8892 ml = 8892 gm = 8892000 mg

1 ml = 1 gram

8892 ml = 8892 gram

1 gram or ml = 1000 milligram

8892 ml = 8892 × 1000 = 8892000 milligram

hope this helps

have a good day :)

Explanation:

remember: 1 kilogram = 1000 gram = 1000000 milligram.

Milliliter is expressed same as gram and liter is expressed same as kilogram.

1 meter = 100 cm, 1 kilometer = 1000 meter,

1 cm = 10 millimeter.

You can't convert ml to gm unless you know the substance. They're all different.

Answer:

A. If motion starts and stop at the same location, then the displacement is zero

C. Distance is always greater than or equal to the magnitude of the displacement

Explanation:

The displacement of a body is a vector quantity that gives the shortest (straight line) distance moved by an object in motion, from its initial position to its final position. The displacement can also be described as the final position relative to the initial position of an object, such that the displacement vector, 's', is given as follows;

[tex]s = x_f - x _i[/tex]

The displacement gives the direct length between two points, with regards to the direction of motion between the points. It can only be described by both the magnitude and the direction

Therefore, displacement can be positive (forward motion), negative (backward motion), or zero (where there is motion that stops at the starting point)

Therefore, a correct options is; If motion starts and stop at the same location, then the displacement is zero

Displacement, being a vector quantity will have both magnitude and direction

Distance, however, is a scalar quantity, it specifies only magnitude, but does not specify direction

Distance, describes the length of the path taken from one point to the other. Distance gives the total movement a body makes, without regards to the direction of the motion

Therefore, distance is always positive or zero (here only the object is stationary)

Therefore, a correct option is; Distance is always greater than or equal to the magnitude of the displacement

Therefore, the correct options are;

If motion starts and stop at the same location, then the displacement is zero

Answer:

20000000000)0000000000000