Please help me find the magnitude and direction of the resultant force​

Explanation:

Once the force of air resistance is as large as the force of gravity, a balance of forces is attained and the skydiver no longer accelerates. The skydiver is said to have reached a terminal velocity.

Answer:

It is a theory

Explanation:

There’s no form or proof or anything even tho it is a hypothesis it’s common and has no evidence due towards it

I just hope this pic will help you

Answer:

Power is 3000 W

Explanation:

Momentum = mass × velocity

[tex]300 = 20 \times v \\ velocity = 15 \: {ms}^{ - 1} [/tex]

For power:

[tex]P = \frac{force \times distance}{time} \\ \\ P = force \times ( \frac{distance}{time} )[/tex]

but distance/time is velocity, so:

[tex]P = force \times velocity[/tex]

but force = mass × acceleration:

[tex]P = (mass \times acceleration) \times velocity \\ P = (20 \times 10) \times 15 \\ P = 3000 \: \: watts[/tex]

[ taken acceleration to be 10 m/s² ]

Answer:

because in vertical slope force of gravity is more than compared to slanted slope

Answer:

because gravity is always pulling objects down so when you climb upward gravity weighs you down, you have to use effort to move yourself in the opposite direction that gravity is pulling you that is why it is harder to climb up a slope.

Answer:

Determine the volume of a human body to use the mass and density of water displaced to calculate the volume of the water displaced.

Answer:

According to me the volume of a human body can me determined by means of the displacement method

Explanation:

if you immerse you body in a drum of water of a known volume, the water displaced is equal to your volume

the IMF in liquids are weaker due to how far the molecules are apart from each other, whereas the IMF in solids are stronger due to how tightly packed the molecules are together.

The object is moving with constant or uniform acceleration and in average speed

The object is de accelerating

The object deaccelerated and came to rest so fast.

The object moves slowly first then accelerated.

The object accelerated at first so fast then move with constant acceleration then again accelerated .

Please find attached photograph for your answer. Hope it helps. Please do comment. The option is c. 15m/s.

Answer:

P = W / t = m g s / t = m g v       where work by auto = m g s

30 kw = 30000 watts = 30000 J / s

Work wasted = F v       as shown above relating work and power

Work done against incline = m g s sin 8.75  and power against incline

= m g v sin 8.75 = 1222 v Joules / sec

power in moving auto = power available - power lost to friction

power in moving auto = 30000 - resistance = 30000 - 910 v

1222 v = 30000 - 910 v

v = 30000 / 2132 = 14 m/s

Note: constant resistance to motion must mean P = W / t = F s / t = F v

Maximum speed will be v = 14.07 m/s

Power is defined time rate of doing work or delivering energy.

Work done = Force * displacement

Power = work done / time

           = (Force * displacement ) / time

since , displacement / time = velocity

Power  = force * (displacement / time ) = force  * velocity

Power = mass * acceleration * velocity (  as force = mass * acceleration)

since , car is travelling up in an incline of 8.75° to the horizontal

hence , it will have two components of velocity

vertical component = v sin (theta ) = v sin(8.75°)

horizontal component = v cos (theta)= v cos (8.75°)

Power = m* a * v sin (theta )

          = 820 * 9.8  * v *sin (8.75°)                        ( a = g = 9.8 m[tex]/s^{2}[/tex])

         = 1221.472 v

Power lost due to resistance in motion  = 910 * velocity = 910 v

Power = Total power - power lost due to resistance in motion

           = 30 * [tex]10^{3}[/tex]  - 910 v

30 * [tex]10^{3}[/tex]  - 910 v = 1221.472 v  

v = 14.07 m/s

Maximum speed will be v = 14.07 m/s

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Answer:

210000.................

The specific heat capacity of glycerine is 2333.3 J/(kg·K).

We can use the formula for heat (Q) absorbed by a substance:

Q = mcΔT

Where Q is the heat absorbed, m is the mass of the substance, c is the specific heat capacity of the substance, and ΔT is the change in temperature.

We know the mass of glycerine (m = 2 kg), the time for which heat is supplied (t = 35 minutes = 2100 seconds), the rate of heat supply (P = 100 W), the initial temperature (T1 = 30°C = 303 K), and the final temperature (T2 = 75°C = 348 K).

First, we need to calculate the total heat absorbed by the glycerine:

Q = Pt

Q = 100 W × 2100 s

Q = 210000 J

Next, we can calculate the change in temperature:

ΔT = T2 - T1

ΔT = 348 K - 303 K

ΔT = 45 K

Finally, we can calculate the specific heat capacity of glycerine:

c = Q/(mΔT)

c = 210000 J/(2 kg × 45 K)

c = 2333.3 J/(kg·K)

Therefore, the specific heat capacity (c) = 2333.3 J/(kg·K).

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Answer:

1) Ans= Pure substances and mixtures are the two types of matter.

2)Ans=solid ,liquid and gas are the states of matter

I assume this is the motion of the simple pendulum

T = 2π × [tex]\sqrt{\frac{L}{g } }[/tex]

=> [tex]\frac{T1}{T2 }[/tex] = [tex]\sqrt{\frac{g2}{g1} }[/tex]

Given T1= 3s g1= 9.79 g2= 9.82

=> T2 = 3.00459 s

maps are for locating an area or a country

Explanation:

they are really beneficial because u will have the advantage to know every country and its location and lines of longitude and latitudes

Answer:

a) 2.28 m/s²

b) 159.86 m

Explanation:

Part A:

u = 0 m/s

v = 27 m/s

t = 11.8 seconds

a = ?

Formula:

v = u + at

=> 27 = 0 + a(11.8)

=> 27 = a(11.8)

=> a(11.8) = 27

=> a = 27/11.8

=> a = 2.28 m/s²

Part B:

s = ?

Formula:

s = (v² - u²)/2a

s = (27² - 0²) /2(2.28)

  = 729/4.56

  = 159.86 m

about 1 trillion neurons

Answer:

perdón yo no hablo inglés

Answer:

a

Explanation:

energy is transferred in electromagnetic waves

Answer:

Due to inertia of restttttttrestrestrestrest

Explanation:

Electricity is the flow of electrical power or charge.

Answer:

All

Explanation:

Answer:

3rd = how living things depend on each other for food

Answer:

the cats acceleration is 4.25m/s2

Answer:

500 in unitivector notion

Explanation:

Compazine belongs to class of drugs called Antiemetic Agents, Antipsychotics, Phenothiazine.

Answer:

Yes, if θ = 45°

Explanation:

Answer:

Fermi is used to express nuclear radius

Answer:

the most suitable unit for expressing nuclear radius is Fermi.

Explanation:

By the formula,

[tex]s=ut+\frac12at^2[/tex]

[tex]-3.5=0+\frac12a(0.809)^2[/tex]

[tex]a=-10.659 ms^{-2}[/tex]

where a is the acceleration of objects by gravity.

We also know that by the Law of Gravitation,

[tex]F=-\frac{GMm}{r^2}=ma[/tex]

[tex]a=-\frac{GM}{r^2}[/tex]

The mass of the planet is given by

[tex]M=\rho V=\rho(\frac 43\pi r^3)[/tex]

So

[tex]a=-\frac{G(\rho\frac 43\pi R^3)}{r^2}= - \frac{(6.67 \times 10^{-11})(5500)(\frac43)\pi R^3}{(R+3.5)^2} = -10.659[/tex]

Since R>>3.5, so we approximate

[tex](R+3.5)^2\approx R^2[/tex]

Solving the last equation,

[tex]R=6936.483 km[/tex]