A transverse wave that has electrical and magnetic properties is known as ________

A cat dozes on a stationary merry-go-round, at a radius of 5.7 m from the center of the ride. Then the operator turns on the rid

tatyana61 [14]

Answer:

0.76

Explanation:

we are given:

radius (r) =5.7 m

speed (s) = 1 revolution in 5.5 seconds

acceleration due to gravity (g) = 9.8 m/s^{2}

coefficient of friction (Uk) = ?

we can get the minimum coefficient of friction from the equation below

centrifugal force = frictional force

m x r x ω^{2} = Uk x m x g

r x ω^{2} = Uk x g

Uk = $\frac{ r x ω^{2} }{g}$

where ω (angular velocity) = $\frac{2π}{time}$

= $\frac{2π }{5.5}$ = 1.14

Uk = $\frac{ 5.7 x 1.14^{2} }{9.8}$ = 0.76

6 0

4 years ago

In an electrical circuit, "_____" refers to the rate at which electrical energy is transformed into another kind of energy.

Tems11 [23]

Answer:

<em>Electrical power</em>

Explanation:

<em>Electrical power:</em> Electric power (P) is defined as the energy (W) used or produced or transformed per seconds.

Power = Energy produced/transformed/time taken.

P = W/t................................ Equation 1

Where t = time taken

But,

W = VIt................................ Equation 2

Substituting equation 2 into equation 1

P = VIt/t

P = VI............................ Equation 3

or

P = V²/R or P = I²R.

The unit of power is J/s or Volt-ampere is called watt (W).

Large amount of electric power are required in the industry

1 kW = 1000 W

1 MW = 1000000 W

1 h.p = 3/4 kW.

8 0

3 years ago

Places with a constant temperature are most likely to be located

Katen [24]

Next to oceans due to high specific heat of sea water.

7 0

4 years ago

Light propagating in air strikes the surface of a lake. The reflected ray makes 62° angle with the normal. What angle does the r

blondinia [14]

Answer:

(a) 42°

Explanation:

According to the law of reflection:

Angle of incidence = Angle of reflection

So, angle of reflection = 62°

Angle of incidence = 62°

For refraction,

Using Snell's law as:

$n_i\times {sin\theta_i}={n_r}\times{sin\theta_r}$

Where,

${\theta_i}$ is the angle of incidence ( 62.0° )

${\theta_r}$ is the angle of refraction ( ? )

${n_r}$ is the refractive index of the refraction medium (water, n=1.33)

${n_i}$ is the refractive index of the incidence medium (air, n=1)

Hence,

$1\times {sin62.0^0}={1.33}\times{sin\theta_r}$

Angle of refraction = $sin^{-1}0.6639$ = 42°

4 0

3 years ago

If 2000 kg cannon fires 2 kg projectile having muzzle velocity 200 m/s then the KINETIC ENERGY of the projectile will be ("E4" m

nordsb [41]

Answer:

$K=4\times 10^4\ J$

Explanation:

Given that,

Mass of cannon is,M = 2000 kg

Mass of projectile, m = 2 kg

Velocity of the projectile, v = 200 m/s

We need to find the kinetic energy of the projectile. We know that the formula for the kinetic energy of an object is given by :

$K=\dfrac{1}{2}mv^2\\\\\text{Putting all the values, we get}\\\\K=\dfrac{1}{2}\times 2\times (200)^2\\\\K=40000\ J$

or

$K=4\times 10^4\ J$

So, the kinetic energy of the projectile will be $4\times 10^4\ J$ .

7 0

3 years ago

A transverse wave that has electrical and magnetic properties is known as _________.