science (Friction/Forces)
which option is correct?

Answer:

22.02

Explanation:

(-21)²+(12)²=r²

r=√585

r=22.02

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People also ask

What are some examples of relative motion?

Relative Motion refers to the motion or speed of any object in respect to a particular point. For example, a ball thrown upward while in a moving object such as a bus, would be traveling the same speed with respect to the bus and would fall again in relation to that speed.

Answer:

The example of relative velocity - a boat crosses a river that is flowing at some rate or an aeroplane encountering wind during its motion.

Answer:

C . 3.75 Ohms

Explanation:

V = IR

R = V / I

From the graph, you pick a value for potential difference and find its corresponding current.

The resistance of the wire in Ohms is 3.75 Ω, therefore the correct answer is option C

Resistance is the obstruction of electrons in an electrically conducting material.

The mathematical relation for resistance can be understood with the help of the empirical relation provided by Ohm's law.

V=IR

where V is the voltage

I is the current

From the voltage-current  graph, one can know the resistance by calculating the slope of the graph

As shown in the graph the variation of the voltage with the current

Y axis represents the voltage and the X axis represents the current

slope = variation in the Y coordinate /variation in the X coordinate

resistance = variation in the voltage /variation in the current

                 = (30 - 0 )/ (8-0 )

                 = 3.75 Ω

Thus, by observation and calculation from the graph, the resistance of the wire comes out to be 3.75 Ω

Learn more about resistance, here

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The specific heat capacity of water is 4,200 Joules per kilogram per degree Celsius (J/kg°C). This means that it takes 4,200 J to raise the temperature of 1 kg of water by 1°C. Lead will warm up and cool down faster because it doesn't take much energy to change its temperature.

Answer:

Density is directly proportional to mass

Density is inversely proportional to volume

Answer:

To be accurate, it must be able to make measurements that are close to the actual value.

Yes

Explanation:

Objects have the same velocity only if they are moving the same speed and in the same direction. objects moving at different speeds, in different directions or both have different velocities

Answer:

yes

Explanation:

speed and velocity are the same thing, except that velocity includes a direction.

ex.

if two things are traveling at 3mi/h, then thats the same speed. but if one is going north and the other south, then those are two different velocities

Answer:

Temperature of the mixture=8 °C

Explanation:

Let, Temperature of the mixture=t °C

Q₁ = Q₂

=> m₁SΔΘ₁ = m₂SΔΘ₂

=> 39 × (20+t) = 21 × (60-t)

∴ t = 8 °C

hope you have understood this

pls mark it as the brainliest

Answer:

25 minutes

Explanation:

Answer:

5 sensory organs

Explanation:

Sight, smell, touch, taste and hear

Answer:

30.5555556 m/s

You can write like "30.56 m/s".

Answer:

Below

Explanation:

You can convert km/h to m/s by dividing the value by 3.6

      110 km/h / 3.6 = 30.5556 m/s

*not sure if your teacher wants you to round to sig figs for this but here it is anyways. Because 110 has 2 sig figs it would be :

    31 m/s

Hope this helps! Best of luck <3

Answer:

320 Ns

Explanation:

As P=mv

So,

80(4)=320

Answer:

Vector Quantities:

Vector quantities refer to the physical quantities characterized by the presence of both magnitude as well as direction. For example, displacement, force, torque, momentum, acceleration, velocity, etc.

Answer:

Running is faster, uses more kilojoules and demands more effort from the heart, lungs and muscles than jogging. Running requires a higher level of overall fitness than jogging. Both running and jogging are forms of aerobic exercise.

Explanation:

Explanation:

msndskkdkekskdkdkjejdkdkd

Explanation:

Pesticides are those substance whoch increase the fertlite rate of the soil but it will damage rhe soil it remine from a long time it descrese the rate of fertize rate

Answer:

I cant open it neither I can download it!

Explanation:

Option C a magnet attracting a nail

Answer:

Distance = 10m and Displacement = 7.2NE

Answer:

My believe the answer is

A.) or B.)

Explanation:

Here is why I think A is the answer.

If we use the process of elimination, it would look like this,

a) Porque el aire tiene una temperatura menor que la de su cuerpo; por eso se propaga más rápido.

This makes sense because we all know in winter the weather is very cold and freezing.

b) Porque la temperatura de su cuerpo, siente el aire frio que entra por la ventana.

I feel like this answer is the question, but it could also be an answer, sorry, I'm a little uncertain.

c) Porque el calor de su cuerpo se propaga al medio ambiente, al ser la temperatura del niño mayor que la del aire exterior.

This answer has nothing to do with the question, plus it is very false, our body heat is not enough to overcome the very cold temperature from outside.

d) Porque la temperatura del aire es igual a la temperatura del cuerpo.

This is false because again our body heat is not even compared to the freezing cold temperatures from the winter.

three plus four NERD

[tex]\mathfrak\purple{ SORRY \: I \: am \: from \: Tamilnadu}[/tex]

Answer:

no c is the correct answer hope it's helpful to you

Li độ cực đại x=A=5 cm

Chu kỳ T= [tex]\frac{2\pi }{4\pi }[/tex] = 0.5s

Tần số f= 1/T = 2Hz

Pha ban đầu = -π/3

x(0) = 2.5cm

x(2)= 2.5cm

Answer:

1

Explanation:

B is -1 m/s but it transfers to 1

During portion B of its motion, the train would have the smallest speed because the slope of the position time graph is the lowest for portion B.

The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object.

As given in the problem we have to find out for which portion of the motion the train would have the smallest speed,

As we know that speed is given by the slope of the position-time graph.

For portion C the slope of the given position-time graph is highest therefore the speed of the train would be largest for portion C.

For portion B the slope of the given position-time graph is lowest therefore the speed of the train would be lowest for portion B.

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Answer:

3125 N

Explanation:

diameter /2 =radius

so r1 =14cm , r2 =35cm

f1/A1 =f2/A2.

f2 = f1 × A2 / A1

=500×1225 pi cm² / 96 pi cm²

f2 =3125N

Answer:

In both cases, the sound and spelling are the same, and only the definition changes. Here are 30 more examples of homonyms. Note that some homonyms have more than two meanings (for example, "tender" can also mean sensitive, easily chewed, or even refer to chicken strips), but to keep things simple we've only included two in our homonyms list:

1:-

[tex]\\ \sf\longmapsto 45.23L[/tex]

[tex]\\ \sf\longmapsto 45.23\times 1000[/tex]

[tex]\\ \sf\longmapsto 45230mL[/tex]

2:-

[tex]\\ \sf\longmapsto .035hL[/tex]

[tex]\\ \sf\longmapsto 0.035\times 10000[/tex]

[tex]\\ \sf\longmapsto 350cL[/tex]

3:-

[tex]\\ \sf\longmapsto 27.32[/tex]

[tex]\\ \sf\longmapsto 27.32\times 0.0001[/tex]

[tex]\\ \sf\longmapsto 0.0027m[/tex]