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2 years ago

2. Two trailers, X with mass 500 kg and Y with mass 2000 kg, are being pulled at the same

Physics

1 answer:

leva [86]2 years ago

4 0

Answer:C

Explanation:

let the speed be v for both mass x and mass y

mass(x)=500kg

mass(y)=2000kg

Kinetic energy(mass(x))=(500 x v^2)/2

Kinetic energy(mass(x))=250v^2

Kinetic energy(mass(y))=(2000xv^2)/2

Kinetic energy(mass(y))=1000v^2

Ratio of kinetic energy y to x =1000v^2:250v^2

=1000v^2 / 250v^2

=4/1=4:1

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In a laundromat, during the spin-dry cycle of a washer, the rotating tub goes from rest to its maximum angular speed of 2.2 rev/

Hunter-Best [27]

Answer:

$n_{T} = 31.68\,rev$

Explanation:

The angular acceleration is:

$\ddot n_{1} = \frac{2.2\,\frac{rev}{s} -0\,\frac{rev}{s} }{8.8\,s}$

$\ddot n_{1} = 0.25\,\frac{rev}{s^{2}}$

And the angular deceleration is:

$\ddot n_{2} = \frac{0\,\frac{rev}{s}-2.2\,\frac{rev}{s} }{20\,s}$

$\ddot n_{2} = -0.11\,\frac{rev}{s^{2}}$

The total number of revolutions is:

$n_{T} = n_{1} + n_{2}$

$n_{T} = \frac{\left(2.2\,\frac{rev}{s} \right)^{2}-\left(0\,\frac{rev}{s} \right)^{2}}{2\cdot \left(0.25\,\frac{rev}{s^{2}} \right)} + \frac{\left(0\,\frac{rev}{s} \right)^{2}-\left(2.2\,\frac{rev}{s} \right)^{2}}{2\cdot \left(-0.11\,\frac{rev}{s^{2}} \right)}$

$n_{T} = 31.68\,rev$

4 0

3 years ago

A net torque of magnitude 600 Nm is ex-

vlabodo [156]

A net torque of magnitude is 600

5 0

2 years ago

What is net force?

drek231 [11]

The answer is d my friend :)

5 0

2 years ago

Read 2 more answers

A laser shines violet light with a frequency of 703 thz onto the metal with a threshold frequency of 295 thz, what is the kineti

hram777 [196]

The kinetic energy of the ejected electrons will be 2782.5 ×10⁻²² eV.

<h3>What is threshold frequency?</h3>

The threshold frequency of incoming radiation is the lowest frequency at which photoelectric emission or electron emission is impossible.

The threshold frequency is the light frequency that causes an electron to dislodge and emit from the metal's surface.

From the photoelectric effect, the equation obtained as;

$\rm hv=hv_0+KE\\\\ KE=h(v-v_0)\\\\ KE=6.625 \times 10^{-34}(702-282)Hz \\\\ KE= 6.625 \times 10^{-34}\times 420 \times 10^{12} \ Hz \\\\ KE=2782 .5 \times 10^{-22} \ eV$

Hence,the kinetic energy of the ejected electrons will be 2782.5 ×10⁻²² eV.

To learn more about the threshold frequency, refer to the link;

brainly.com/question/2499414

#SPJ1

3 0

1 year ago

A parking lot charges 3 dollars for the first hour (or part of an hour) and 2 dollars for each succeeding hour (or part), up to

Aneli [31]

Answer:

function is discontinuous

and

after 3 hours upto day 24 hours fix charge $10

so there are discontinuous at 1st hour, 2nd hours and 3rd hours

Explanation:

given data

charge = $3 for 1st hour

charge = $2 for each succeeding hour

maximum charge = $10 daily

to find out

Is this function continuous

solution

their function is 3 +2x

so function is discontinuous here

and

this is very clear for 1st hour or part of hour it mean charge a fix value in given time

anyone who park fix charge for 60 min up to the 3 hours

after that for day 24 hours fix charge $10

so there are discontinuous at 1st hour, 2nd hours and 3rd hours

6 0

2 years ago