A. 7cm
B. 24cm
C. 18cm
D. 63cm​

Answer:

Explanation:

A convex mirror is used in automobiles to have a Clear View of the traffic behind because they give an erect, virtual, full size diminished image of distant objects with a wider field of view.

hope it helps :)

Answer:

the answer is 12 second easy

Answer:

a) The distance each child ran is approximately 0.232 m

b) The angular acceleration is 0.21[tex]\overline 6[/tex] rad/s²

Explanation:

The given parameters of the merry-go-round are;

The mass of the merry-go-round, m = 240-kg

The diameter of the merry-go-round, d = 4.00 m

The number of children pushing tangentially on the merry-go round = Four children

The spinning rate of the merry-go-round, n = 2.14 rev/minute

a) Given that the force exerted by each child = 26 N, we have;

The total force applied by the four children, F = 26 N × 4 = 104 N

The tangential acceleration, [tex]a_t[/tex] = F/m = 104 N/240-kg = 0.4[tex]\overline 3[/tex] m/s²

The angular acceleration, α = [tex]a_t[/tex]/r

Where, the radius of the merry-go-round, r = d/2

∴ r = 4.00 m/2 = 2.00 m

α = 0.4[tex]\overline 3[/tex] m/s²/(2.00 m) = 0.21[tex]\overline 6[/tex] rad/s²

We have;

ω² = ω₀² + 2·α·Δθ

The merry-go-round starts from rest, therefore; ω₀ = 0 rad/s

ω² = 2·α·Δθ

Δθ = ω²/(2·α)

n = 2.14 rev/minute

∴ ω = 2·π×2.14/60 rad/s ≈ 0.22410 rad/s

∴ Δθ = (0.22410 rad/s)²/(2 × 0.21[tex]\overline 6[/tex] rad/s²) ≈ 0.11589 rad

Therefore, the angle each child ran, θ = 0.11589 rad

The distance each child ran = r·θ

∴ The distance each child ran = 2.00 m × 0.11589 rad ≈ 0.232 m

b) From part 'a' above, the tangential acceleration, [tex]a_t[/tex] = 0.4[tex]\overline 3[/tex] m/s²

Angular acceleration, α = [tex]a_t[/tex]/r

∴ α = 0.4[tex]\overline 3[/tex] m/s²/(2.00 m) = 0.21[tex]\overline 6[/tex] rad/s²

The angular acceleration = 0.21[tex]\overline 6[/tex] rad/s²

Answer: The microwaves are reflected within the metal interior of the oven where they are absorbed by food. Microwaves cause water molecules in food to vibrate, producing heat that cooks the food.

Explanation:

Answer: [tex]1.8409\ kN[/tex]

Explanation:

Given

Mass of student [tex]m=70\ kg[/tex]

Mass of Jupiter [tex]M=1.901\times 10^{27}\ kg[/tex]

Distance between them is [tex]r=6.98\times 10^7\ m[/tex]

Gravitational force is given by

[tex]\Rightarrow F=\dfrac{GmM}{r^2}\\\\\Rightarrow F=\dfrac{6.74\times 10^{-11}\times 70\times 1.901\times 10^{27}}{(6.98\times 10^7)^2}[/tex]

[tex]\Rightarrow F=18.409\times 10^{-11+27-14}=1.8409\ kN[/tex]

If the distance is cut to half, then the force will be four times the initial force

Answer:

Explanation:La ecuación de Van der Waals es una ecuación de estado de un fluido compuesto de partículas con un tamaño no despreciable y con fuerzas intermoleculares, como las fuerzas de Van der Waals. La ecuación, cuyo origen se remonta a 1873, debe su nombre a Johannes van der Waals, quien recibió el premio Nobel en 1910 por su trabajo en la ecuación de estado para gases y líquidos, la cual está basada en una modificación de la ley de los gases ideales para que se aproxime de manera más precisa al comportamiento de los gases reales al tener en cuenta su tamaño no nulo y la atracción entre sus partículas.

Answer:

True

Explanation:

When the periodic time increases the frequency is lower.

Answer:

a) the first vector has magnitude 58 cm and the angle is 15 measured clockwise from the positive side of the x-axis

b) the second vector, the magnitude is 55.7 cm and the angle is 35 half from the negative side of the x-axis in a clockwise direction

c) the magnitude is 54.2 cm with an angle of 18 measured counterclockwise from the x-axis

Explanation:

For this exercise we draw a Cartesian coordinate system in this system: East coincides with the positive part of the x-axis and North with the positive part of the y-axis.

a) the first vector has magnitude 58 cm and the angle is 15 measured clockwise from the positive side of the x-axis

b) the second vector, the magnitude is 55.7 cm and the angle is 35 half from the negative side of the x-axis in a clockwise direction

c) the magnitude is 54.2 cm with an angle of 18 measured counterclockwise from the x-axis

In the attachment we can see the representation of the three vectors

Answer:

9.2m/s sir Thank me later

Answer:

Given

mass (m) =985 ☓ 0.001 , 0.985 kg

velocity (v) =3.82m/s

kinetic energy(k. e) =?

Form equation

[tex]k.e = \frac{1}{2} mv {}^{2} \\ = \frac{1}{2} \times 0.985 \times 3.82 {}^{2} \\ = 7.1868kj \\ kinetic \: enegy = 7.1868kj[/tex]

I hope this help

Answer:

It would be. Quarter dark

Explanation:

Sun's lights going all the way to the moon but there will still a dark part of it

it's obviously won't be neither complete light nor completely dark

so the right answer is: Quarter dark

Answer:

yes!

Explanation:

Answer:

yes!!

Explanation:

Answer:

A sound wave that has a higher frequency is a wave that makes 12 cycles per second.

Explanation:

The frequency of a wave is the same as the frequency of the vibrations that caused the wave. This takes more energy, so a higher-frequency wave has more energy than a lower-frequency wave with the same amplitude.

Answer:

See explanation below

Explanation:

Recall that the force of static friction is the product of the coefficient of static friction between surface and object, times the force applied perpendicular to the surface.

In our case, that perpendicular force has magnitude equal to the centripetal acceleration times the mass m of the block. The centripetal acceleration is defined as the quotient between the square of the tangential velocity divided by the radius at which the rotating mass is located (in our case R).

In order to estimate the tangential velocity given the angular velocity ω, we simply multiply it by R:  

[tex]v_t=\omega\,R[/tex]

and therefore the force acting on the surface of the cylinder is:

[tex]F=m\,*\,a_c=m\,*\,\frac{v_t^2}{R} =m\,*\, \frac{\omega^2\,R^2}{R} =m\,*\,\omega^2\,*R[/tex]

The force of friction between the block and the inner wall of the hollow cylinder will then be:  [tex]f=\mu\, *\,m\,*\omega^2\,*\,R[/tex]

In order for this force of static friction to be able to prevent the mass to slide down due to gravity, we need that the friction force is at least equal to the gravitational force. That is:

[tex]f\geq F_g\\f\geq m\,*\,g\\\mu\,*\,m\,*\,\omega^2\,*\,R\geq m\,*\,g\\\mu\geq \frac{g}{\omega^2\,*\,R}[/tex]

The force of static friction to prevent the mass to slide down due to gravity, the friction force is must be equal or greater than to the gravitational force.

The force of static friction is the product of the coefficient of static friction between surface,and force applied perpendicular to the surface.

The tangential velocity,

[tex]\bold {V_t = \omega R}[/tex]

So,  the force acting on the surface of the cylinder,

[tex]\bold {F= m\times a_c}\\\\\bold {F= m \times \dfrac {V_t^2 }{R}}\\\\\bold {F = m \times \dfrac {\omega ^2R2}{R}}}\\\\\bold {F = m \times \omega ^2 \times R}[/tex]

The force of friction between the block and the inner wall of the hollow cylinder,

[tex]\bold {F_f = \mu \times m \times \omega ^2 \times R}[/tex]

Therefore, the force of static friction to prevent the mass to slide down due to gravity, the friction force is must be equal or grater than to the gravitational force.

To know more about static friction,

https://brainly.com/question/8790433

Answer:

30 30 30 yuhhhhhhhhhhhh

Answer:

b. biologucal

Explanation:

it is b. biologucal

The etiology of somatoform disorders may consist of all the following except biological. Option B is correct.

Somatoform disorder,is a mental health illness in which a person experiences physical symptoms as a result of psychological discomfort.

Family with a negative or anxious personality are more likely to acquire somatoform illnesses.

The etiology of somatoform disorders may consist of all the following except biological.

Hence,option B is correct.

To learn more about the somatoform disorders refer:

https://brainly.com/question/12164980

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Answer:

C. Sternal Head, Clavicular Head

Answer:

A liquid becomes a gas.

Explanation:

I hope this helps a bit.

Answer:

The magnitude of swing's tension is 0.71 N.

Explanation:

Given;

mass of the ball, m = 18 g = 0.018 kg

angular speed of the ball, ω = 1 rev/s

radius of the motion, r = 1 m

Angular speed in rad/s is calculated as follows;

[tex]\omega = \frac{2\pi \ rad}{rev} \times \frac{1 \ rev}{s} \\\\\omega = 2 \pi \ rad/s[/tex]

Linear speed of the ball, v;

v = ωr

v = 2π x 1

v = 2π  m/s

The magnitude of swing's tension is calculated as the centripetal force keeping the ball in circular motion.

[tex]F_c =T = \frac{mv^2}{r} \\\\T= \frac{0.018 \ \times (2\pi )^2}{1} \\\\T = 0.71 \ N[/tex]

Therefore, the magnitude of swing's tension is 0.71 N.

Answer:

Explanation:

Answer: None of the above I got it right on my test

Answer:

90 N

Explanation:

m = 60 kg

a = 1.5 m/s^2

F = m × a = 1.5 × 60 = 90 N

Answer:

is this math of science

Explanation:

Answer:

Food is potential energy because as our bodies digest it then the stored energy will turn into energy that helps us to move and grow

Explanation:

i hope this helps

Answer:

z3

Explanation:

Answer:

to something in action there is always a equal and opposite reaction. Like if you bounce a bounce ball on the ground, it will bounce back.

Explanation:

Thus 1 cm–3 = 1/cm3 and the units for our densities could be written as gcm3, g/cm3, or g cm–3. In each case the units are read as grams per cubic centimeter, the per indicating division.) We often abbreviate "cm3" as "cc", and 1 cm3 = 1 mL exactly by definition.

...

1.9: Density.

Answer:

5

Explanation:

density = mass/volume

density = 25g /5 mL

density = 5

Answer:

um Saturday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday?

Explanation:

understand friend

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