When white light shines on a thin film of soap, light is reflected from:.

Answer:

In earlier washing machine, the electrical energy is converted in rotational kinetic energy. Now a days, in washing machine, the electrical energy is converted in kinetic energy then the mechanical energy is converted into heat energy. In modern machines, we can wash and dry the clothes.

Answer:

either atoms or molecules

Scientist in the laboratory create uniform electric field.

PART A: The electric field in rocket frame is  (0,0,  6.0 × 10 ⁵).

PART B: The magnetic field in the rocket frame is  7.3 × 10⁻⁶ j∧  .

The electric field whose strength is not changing with respect to time is called uniform magnetic field.

The electric field is 6.0 × 10 ⁵ k^v/m and the magnetic field is zero.

E' = E + (V×B)

    = 6.0 × 10 ⁵ + (1.1 × 10⁶ × 0)

E' = 6.0 × 10 ⁵ k∧

(Ex , Ey, Ez) = (0,0,  6.0 × 10 ⁵)

The new magnetic field is represented as

B' = B - 1 /c²(v × E)

   =0 - 1 / (3× 10⁸)²(1.1 × 10⁶ i∧ × 6.0 × 10 ⁵k∧ )

B' = 7.3 × 10⁻⁶ j∧

PART A: The electric field in rocket frame is  (0,0,  6.0 × 10 ⁵).

PART B: The magnetic field in the rocket frame is 7.3 × 10⁻⁶ j∧ .

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Answer:

The mass of the products and reactants are the same on both sides of the equation.

The number of atoms of products and reactants are equal and hence it proves the law of conservation of mass.

.

Detailed Explanation:

The total kinetic energy of a 5-kg hoop with a radius of 0. 5 m when it rolls without slipping at 4. 0 m/s is 80 Joules.

The kinetic energy is the ability to do work by virtue of its motion.

The mass of the hoop is 5 kg, the radius of the hoop is 0.5 m and the speed with which it is rolling is 4.0 m/s.

The angular speed of the hoop is

ω = v / r

ω = 4 / 0.5 = 8 rad/s

The moment of inertia of the hoop is I = m r² / 2

The kinetic energy of the rolling object is the addition of translation and rotational kinetic energy.

K.E = 1 / 2(mv²) + = 1 / 2(Iω²)

Substituting the values into the above equation and solving, we get the total kinetic energy.

K.E = 40 + 40 = 80 Joules

Thus, the total kinetic energy is a rolling hoop is 80 Joules.

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Answer:

B

Explanation:

This is the discovery of redshift that led scientist to say the universeis still expanding

Answer:

25 sec

Explanation:

F = ma

100 = 50 a

a = 2 m/s^2

vf = vo + at

150 = 100 +  2 t

50 = 2 t

t = 25 sec

Explanation:

mass=3kg

height=12m

and all of them now

gravity=9.8m/S2

required

k.e = ?

solution

k.e=p.e

so p.e=MGH

p.e=MGH

=3kg*9.8m/S2*12m

=352.8kg m2/S2

=352.8 J

so we said p.e=k.e

therefore 352.8 J = k.e

Explanation:

Given parameters:-

To find:-

Solution:-

Here , we are provided frequency of electromagnetic wave and we have to find the wavelength of the wave. To find the wavelength we have to divide the speed of light by given frequency. therefore,

[tex]\tt\red{wavelength( \lambda)= \frac{speed(c)}{frequency(f)}}[/tex]

[tex] \rightarrow \sf \: \lambda = \frac{3 \times {10}^{8} }{8.2 \times {10}^{14} } \\ \\ \rightarrow \sf \: \lambda = \frac{3 \times {10}^{8} \times {10}^{ - 14} }{8.2} \\ \\ \rightarrow \sf \: \lambda = 0.36 \times {10}^{6} \\ \\ \rightarrow \sf \: \lambda = 36 \times {10}^{4}m[/tex]

Answer:

the answer is letter D.

Explanation:

i hope this is help

Answer:

great answer warstep8! add me on disc colludy#8415

Explanation:

Answer:

c . they have high boiling points

Answer:

something is passing infront of it

Explanation:

something is orbiting it and blocking its light

[tex]30 \Omega || 40\Omega ~ \text{and}~50\Omega || 30 \Omega\\\\\text{Equivalent resistance of the whole circuit,}\\ \\R_{eq} = \left(\dfrac{30 \times 40}{30+40} \right) + \left( \dfrac{50 \times 30}{50+30} \right)\\\\\\~~~~~~=\dfrac{1005}{28}~ \Omega\\\\\text{By Ohm's law,}\\\\~~~~~V=IR\\\\\implies I = \dfrac{V}{R} = \dfrac{9}{\tfrac{1005}{28}} = \dfrac{252}{1005}= \dfrac{84}{335}~ A\\\\ \text{Voltage drop between points A and B,}\\\\V_{AB} = IR_{AB}\\\\\\[/tex]

      [tex]~~~~~~~=\dfrac{84}{335} \cdot \left(\dfrac{30 \times 40}{30+40} \right)\\\\\\~~~~~~~= \left( \dfrac{84}{335} \right) \left(\dfrac{120} 7 \right)\\\\\\~~~~~~~=\dfrac{288}{67}~V\\\\\\~~~~~~~=4.298~V[/tex]

Answer:

307.44 m    (whatever 'm' is)

Explanation:

355 * cos (30) = 307.44

Answer:

both

Explanation:

You'll use less water....less hot water   so water and energy are saved

Lets learn the relationship

[tex]\\ \rm\dashrightarrow \lambda=\dfrac{v}{\nu}[/tex]

[tex]\\ \rm\dashrightarrow \nu=\dfrac{v}{\lambda}[/tex]

[tex]\\ \rm\dashrightarrow \nu\propto \lambda\propto v[/tex]

Hence.

frequency and wavelength will be. doubled also

The chemical symbols for three different atoms or atomic anions with 9 electrons are Neon (Ne), Florine (F⁻¹) and Oxide (O⁻²).

An atom is the smallest unit of matter, consisting of the positively charged nucleus and the electrons which move around it. The atom can not be divided further.

The atom of a matter is made by three elements-

The chemical symbols for three different atoms or atomic anions with 9 electrons has to be write down. Anion is the element which has more number of electron compare to its protons.

This makes the element negatively charged. Neon (Ne), Florine (F⁻¹) and Oxide (O⁻²) are the element which have atomic anions with 9 electrons.

Thus, the chemical symbols for three different atoms or atomic anions with 9 electrons are Neon (Ne), Florine (F⁻¹) and Oxide (O⁻²).

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The currrent flowing the circuit with the given voltage and resistance is 0.25 Ampere.

Option A) 0.25A is the correct answer.

Ohm’s law states that "the potential difference between two points is directly proportional to the current flowing through the resistance.

It is expressed as;

V = I × R

Where V is the voltage or potential difference, potential difference, I is the current and R is the resistance.

Given that;

We substitute our given values into the expression above.

V = I × R

9.0V = I × 36.0Ω

I = 9.0V / 36.0Ω

I = 0.25A

Therefore, the currrent flowing the circuit with the given voltage and resistance is 0.25 Ampere.

Option A) 0.25A is the correct answer.

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[tex]R_{eq(23)} = \left(\dfrac 1{R_2} + \dfrac{1}{R_3}\right)^{-1}\\\\\\~~~~~~~~~= \left( \dfrac 1{200} + \dfrac 1{300} \right)^{-1}\\\\~~~~~~~~~=\left( \dfrac{5}{600} \right)^{-1}\\\\\\~~~~~~~~~=\dfrac{600}5\\\\\\~~~~~~~~~= 120~ \Omega[/tex]

Step-by-step explanation :

Here we have to calculate the equivalent resistance of the parallel combination between R2 and R3.

As we know that,

>> 1/Rp = (1/200) + (1/300)

>> 1/Rp = (300 + 200 / 600)

>> 1/Rp = 500 / 600

>> 1/Rp = 5 / 6

>> Rp = 6 / 5

>> Rp = 1.2Ω

Therefore,

Answer:

D

Explanation:

toke the test Regions of high pressure and low pressure

0.25 kg

Explanation:

[tex]p = m \times v \\ 2.5 = m \times 10 \\ m = \frac{2.5}{10} \\ \boxed{m = 0.25} [/tex]

Answer:

t= 278/17 =16.35s

Explanation:

p=w/t

t=w/p

∴t=278/17

Answer:

t=16.4

Explanation:

power = energy/time

p=e/t

17=278/t

t=278/17

t=16.352941

t=16.35

t=16.4

Answer:

true

Explanation:

An energy equation is a chemical equation which involves the energy that is evolved or absorbed in the reaction.

The term energy refers to the ability to do work. An energy equation is a chemical equation which involves the energy that is evolved or absorbed in the reaction.

This question is incomplete as the former energy equation is not shown. However, such equations can be used to know an endothermic or exothermic reaction.

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Answer:

3.918*10^-2N

Explanation:

force=magnetic flux*current*length

force=5.41*10^-5*22.84*31.71

force=3.918*10^-2N

Hubbles' law is applicated on galaxies. The galaxy which is 1000 Mly distant from us has the speed 20000 km/s.

Hubble's law is defined as the galaxies are moving away from Earth at speeds proportional to their distance.

Hubble's law is written as

v = H₀d

Here v is the recession velocity of a galaxy located a distance d away from us, and H₀ is Hubble's constant.

Suppose H₀ = 20 km/s/Mly.

1 parsec = 3.08 ₓ 10¹⁶ m

1 M parsec = 3.08 ₓ 10²² m

The speed v of the galaxy is

v = 20 ₓ 1000

v = 20000 km/s

Thus, the galaxy which is 1000 Mly distant from us has the speed 20000 km/s.

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Answer:

True but mostly false.

Explanation:

If you squint enough at night, you'd be able to see it. Otherwise it's not really possible.

A passenger experiences centripetal acceleration when there is circular motion around a center. The centripetal acceleration is 3 m/s².

The centripetal acceleration is the acceleration acting when a body is moving on a circular path. It is acted towards the center of the path. Centripetal acceleration is the product of the square of angular speed and radius of path.

a =ω²r

Given the radius of path r is 12 m and angular speed ω is 0.50 rad/s².

The resulting centripetal acceleration is

a = (0.50)²×12

a = 3 m/s²

Thus, the centripetal acceleration is 3 m/s².

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