18. Which two quantities are measured in the same units?
A. velocity and acceleration C. mass and weight
B. weight and force
D. force and mass

The wavelength of the  radio wave in water is 222nm

The relationship between the refractive index  wavelengths in a vacuum and in water is given by:

n = λ1/λ2

So,

let λ1 be the wavelength of light in a vacuum

λ2 be the wavelength of light in water.

nwater = 1.33

Plugging in values, we have

n = λ1/λ2

1.33 =295 m /λ2

λ2 = 295 m/1.33

 = 221.80nm

 ≈222nm

Therefore the wavelength of radio wave in water is 222mn.

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The work the truck engine did during the 2 hour period is 8.1 × 10⁹ J

From the question, we are to determine how much work the truck engine did

Work is given by the formula

Work = Force × Distance

First, we will determine the distance traveled by truck

From the formula,

Distance = Speed × Time

From the given information

Speed = 45 m/s

Time = 2 hours = 2×60×60 = 7200 secs

Then,

Distance = 45 × 7200

Distance = 324000 m

Now, for the work done

Work = Force × Distance

From the given information,

Force = 25 kN = 25000 N

Therefore,

Work = 25000 × 324000

Work = 8.1 × 10⁹ J

Hence, the work the truck engine did during the 2 hour period is 8.1 × 10⁹ J

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Answer:

5,0000

Explanation:

because if u divide the 10 by 2 possible it will be 5 so u add your zero

The potential energy of the fighter jet of mass 'm' at a height of 10000 meters will be 98000m.

The energy of the body due to its position is called potential energy. If a body of mass 'm' is at height 'h' above the ground, then its potential energy with respect to earth will be -

E[P] = mgh

Given is a fighter jet traveling at a height of 10,000 meters.

The potential energy of a body at height 'h' above the ground is given by-

E[P] = mgh

where -

m is the mass of body

g is the acceleration due to gravity

Assume that the mass of jet fighter is 'm'. Then its potential energy will be -

E = mgh

E = m x 9.8 x 10000

E = 98000m

Therefore, the potential energy of the fighter jet of mass 'm' at a height of 10000 meters will be 98000m.

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Answer:

45

Explanation:

The French encouraged the African people to take on the culture of the French.

Colonies refers to areas which the Europeans allocated to themselves after they occupied Africa in the 18th to 19th centuries. They ruled these  areas directly until they eventually secured independence.

The following are the statements that describe the French control of its territories;

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We have that the magnitude of the magnetic field is determined by the amount of current produced.

Generally,  the magnetic field strength is called the tesla This  is measured as one Newton per ampere-meter.

Electromagnet is a  magnet where the magnetic field is created by an electric current,

Therefore the magnitude of the magnetic field is determined by the amount of current produced

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List the three things forces are needed for on Earth.

I added another one just cause there's four things forces are needed for on earth :-)

V(final) = V(initial) + a•t

Take the numbers you know, pluggum in, and you should get 3.836 m/s .

Note: This is just the final speed. Without any direction information, there's no way to find the velocity.

Answer:

800 kg is your answer.

Explanation:

[tex]Solution,\\\\Force(F)=1200N\\\\Acceleration(a)=1.5m/s^{2} \\\\As,\\\\F=ma\\\\1200=m*1.5\\\\m=\frac{1200}{1.5} \\\\m=800kg[/tex]

While alloys are melted mixtures of two or more metals, true metals are unadulterated components. Due to their tendency to be shinier, heavier, and harder than the majority of materials, as well as the fact that they are great heat- and electricity-conductors, metals, and alloys are simple to differentiate from nonmetals.

As a compound or a solution, an alloy is a metallic material made up of two or more elements. Although carbon, a nonmetal, is a crucial component of steel, alloys typically contain metals as their own constituents.

Typically, the mixture of elements is melted to create an alloy. In very early periods, the value of alloys was discovered; brass (copper and zinc) and bronze (copper and tin) were particularly significant.

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Answer:

A complete vibration is called a "period".

Starting at 0, the particle would move to +A, back to zero, to -A and back to zero to complete one cycle of a vibration

Answer:

Doubling the speed.

E - M v^2

M = W / g     energy is proportional to weight

But energy is proportional to v^2

Answer:

a. gravity & hand on book

b. yes - 3rd law

c. no, the are acting on the same object

Hope this helped!

Answer:

The first force is your hand holding the book up, and the other one is gravity pulling the book down. Hope i helped :D

Explanation:

Answer:

A

Explanation:

Answer:

waste water can be purified naturally by sunlight, temperature, filtration, adsorption, sedimentation, biodegradation,

Answer:

Filtration, sedimentation, or distillation

Answer:

1 g/cm³

Explanation:

1 kg = 1000 g

1 cm = 0.01 of a meter

1 m³ = 100 cm * 100 cm * 100 cm = 1,000,000 cm

1,000 kg / 1 * 1000 g / 1 kg

^ divided by 1,000,000 cm

1,000,000 divided by 1,000,000 = 1 g/cm³

Hi there!

Assuming the rod is pulled back 90° (π/2 radians), we can use angular kinematics to solve.

Using the equation:

[tex]\omega_f^2= \omega_i^2 + 2\alpha \theta[/tex]

[tex]\omega_f[/tex] = final angular velocity (? rad/sec)

[tex]\omega_i[/tex] = initial angular velocity (0 rad/sec)

[tex]\alpha[/tex] = angular acceleration (rad/sec², must solve for)

[tex]\theta[/tex] = angular displacement (π/2 rad)

Recall Newton Second Law's rotational equivalent:
[tex]\Sigma \tau = I\alpha[/tex]

τ = Torque (Nm)

I = Moment of inertia (kgm²)
α = angular acceleration (rad/sec²)

Setting the pivot point at the end, and knowing that the force of gravity works at an object's center of mass (1.5m from the rod's end), we can solve for the angular acceleration.

[tex]\tau= F \times r\\\\\tau = W \times r = 10(9.8) * 1.5 = 147 Nm[/tex]

Now, solve for the moment of inertia given I = 1/3ML² at one of its ends:
[tex]I = \frac{1}{3}(10)(3^2) = 30 kgm^2[/tex]

Solve for the angular acceleration:
[tex]147 = 30\alpha\\\\\alpha = 4.9 \frac{rad}{sec^2}[/tex]

Now, we can use the kinematic equation to solve.

[tex]\omega_f^2 = 0 + 2(4.9)(\frac{\pi}{2}})\\\\\omega_f = \sqrt{2(4.9)(\frac{\pi}{2})} = \boxed{3.923 \frac{rad}{sec}}[/tex]

Answer:

Once

Explanation:

The time between new moon and the end of the cycle of the moons is about 29.53 days, which is roughly a month

Answer:

We know that 1 meter = 100 centimeters, and 1 foot = 12 inches.

So  (1,609 meters) x (100 centimeters/meter)  =  (5,280 feet) x (12 inches/foot)

The second fraction on each side of the equation is equal to ' 1 ', because

the numerator is equal to the denominator, so sticking it in there doesn't

change the value of that side of the equation.  But now we can cancel some

units,and wind up with the units we need.

  (1,609 meters) x (100 centimeters/meter)  =  (5,280 feet) x (12 inches/foot)

        (1,609 x100) centimeters  =  (5,280 x 12) inches

            160,900 centimeters  =  63,360 inches

Divide each side by  63,360 :        2.54 centimeters =  1 inch

Explanation:

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Answer:

.516

Explanation:

I typed this into Acellus and it was correct.

Answer:

here Humans impact the physical environment in many ways: overpopulation, pollution, burning fossil fuels, and deforestation. Changes like these have triggered climate change, soil erosion, poor air quality, and undrinkable water. These negative impacts can affect human behavior and can prompt mass migrations or battles over clean water.

Explanation:

Answer:

10-0÷2=5 that's the answer

Answer: The hydration reaction of sulfuric acid is highly exothermic. If water is added to concentrated sulfuric acid, it can boil and spit dangerously. You should always add the acid to the water rather than the water to the acid for safety.

hope this helps!

P = F : A

[tex]\tt P=\dfrac{550~N}{0,0001~m^2}=5.5\times 10^6~Pa[/tex]

Answer:

D. None of the the statements above are correct.

Explanation:

Microscopes and telescopes are major instruments that have contributed hugely to our current understanding of the micro- and macroscopic worlds. The invention of these devices led to numerous discoveries in disciplines such as physics, astronomy, and biology, to name a few. In this section, we explain the basic physics that make these instruments work.

Answer:

d. is the answer hope it helps

Answer:

80 [Ω].

Explanation:

according the formula I=U/R, where U=120[V], I=1.5[A], the required resistance can be calculated

[tex]R=\frac{U}{I}; \ => \ R=\frac{120}{1.5}=80[Ohm].[/tex]

So, the temperature of a wave that has a wavelength of 5 m is [tex] \boxed{\sf{5.796 \times 10^{-4} \: K}} [/tex]

Hi ! Here, I will help you to explain about The relationship between temperature and electromagnetic wavelength uses the principle of Wien's Constant. According to Wien, if we multiply temperature with the electromagnetic wavelengths will always got the same number (constant). Therefore, The relationship is expressed in this equation :

[tex] \boxed{\sf{\bold{C = \lambda_{max} \times T}}} [/tex]

With the following condition :

We know that :

What was asked :

Step by step :

[tex] \sf{C = \lambda_{max} \times T} [/tex]

[tex] \sf{2.898 \times 10^{-3} = 5 \times T} [/tex]

[tex] \sf{T = \frac{2.898 \times 10^{-3}}{5}} [/tex]

[tex] \sf{T = \frac{2.898 \times 10^{-3}}{5}} [/tex]

[tex] \sf{T = 0.5796 \times 10^{-3}} [/tex]

[tex] \boxed{\sf{T = 5.796 \times 10^{-4} \: K}} [/tex]

So, the temperature of a wave that has a wavelength of 5 m is [tex] \boxed{\sf{5.796 \times 10^{-4} \: K}} [/tex]