Please solve this worksheet for me It’s very important please don’t write unnecessary things or else I’ll report please help me i request

Answer:=7x−7

Explanation:

=2x+5x+−7

=(2x+5x)+(−7)

=7x+−7

Answer:c 40kg

Explanation:

Answer:

B. 30 kg * m/s

Explanation:

college board answer

Answer: (A) Ingrid is incorrect. The clay appears red because it reflects red wavelengths.

Explanation:

Edge 2021

Ingrid is correct. The clay appears red because it reflects red wavelengths.

Hence option A is correct.

Wave is is a disturbance in a medium that carries energy as well as momentum . wave is characterized by amplitude, wavelength and phase. Amplitude is the greatest distance that the particles are vibrating. especially a sound or radio wave, moves up and down. Amplitude is a measure of loudness of a sound wave. More amplitude means more loud is the sound wave.

Wavelength is the distance between two points on the wave which are in same phase. Phase is the position of a wave at a point at time t on a waveform.

There are two types of the wave longitudinal wave and transverse wave.

Longitudinal wave : in which, vibration of the medium (particle) is parallel to propagation of the wave. Sound wave is a longitudinal wave. Transverse wave : in which, vibration of the medium (particle) is perpendicular to propagation of the wave. Light wave is a Transverse wave.

Ingrid says that a red ball of clay appears red because the clay reflects red wavelengths. this statement is true.

Hence option A is correct.

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Answer:

yes her device can produce

Explanation:

An electromagnetic force is produced by this setup.

The question suggests the construction of a solenoid with an iron core.I have attached an image. A solenoid has an iron core wrapped around by insulating wires. When the insulating wires are connected to a battery or a voltage source, current flows in the wire and travels through the wrapped region around the iron core. Now, this current produces a magnetic field inside the solenoid, directed along the axis of the solenoid. When the iron core comes under the influence of this magnetic field, it magnetizes and acts as a strong magnet and can produce magnetic force. The force generated through this process is called electromagnetic force.

When the battery is removed, the solenoid returns to its original state, which is it doesn't act as a magnet anymore. By the way, iron retains some magnetization.  

Learn more about electromagnetic force:

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Answer:

c

Explanation:

because what else can the laser be used for

Answer:

B. Acceleration in the direction of motion speeds you up

Explanation:

Acceleration is defined as when something gains speed. For example, when a car speeds up. Deceleration is when the car slows down, and looses speed. When defining these terms, think of a car going faster, then slowing down at a red light.

Answer:

Magnetic energy is used by an electromagnet  to pick up metallic objects

Explanation:

An electromagnet generates its own magnetic field in presence of electric current.

As an electric current is induced in an electromagnet , it  magnetic dipole arrange themselves in order to behave as a magnet and hence generate magnetic field with a proper north and south. This leads to attraction of metallic object.

Hence, it can be said that Magnetic energy is used by an electromagnet  to pick up metallic objects

Answer:

Q1: c

Q2: a

Explanation:

you can tell the factors by looking at the formulas for kinetic and potential energy

for question 1  look at the formula for kinetic energy

[tex]KE=\frac{1}{2} mv^{2}[/tex]

the variables needed in order to calculate an object's kinetic energy are mass and velocity.

hence, when mass and velocity changes, kinetic energy changes, showing that mass and velocity are the factors affecting kinetic energy

same thing for the second question

[tex]PE = mgh[/tex]

as g (acceleration due to gravity) is considered constant (10 [tex]m/s^{2}[/tex] ) it will not be considered as a factor

and thus, the factors affecting potential energy are mass and height

9514 1404 393

Answer:

  5) 0.64Ω

  6) 0.16 W

Explanation:

Put the given numbers into the given formula and do the arithmetic.

5)

  [tex]\text{ohms}=\dfrac{\text{volts}}{\text{amps}}=\dfrac{0.32\text{ V}}{0.50\text{ A}}=\boxed{0.64\ \Omega}}[/tex]

__

6)

  [tex]\text{watts}=\text{volts}\times\text{amps}=(0.32\text{ V})\times(0.50\text{ A})=\boxed{0.16\text{ W}}[/tex]

Answer:

just ok02

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Answer:

127

Explanation:

f(n)=mg

(13)*(9.81)

127.4N

Answer:

False

Explanation:

Fusion doesn't produce more.

Answer:

Hellow ❤️

.

.

Gooood Morning

Answer:

?

Explanation:

I thought we were talking about a Flashpoint or something?

ANSWER:

Answer: they are high in all except fiber

Answer:

a)     v = 345.5 m / s,  b)    f = 183.8 Hz,  c)  λ = 1,336 m

Explanation:

a) the speed of sound depends on the density of the medium and this depends on the temperature, therefore

         v = [tex]v_o \ \sqrt{1+ \frac{T}{273} }[/tex]

where v₀ is the speed of sound at 0ºC v₀ = 331 m / s

         v = 331  [tex]\sqrt{1 + \frac{24.5}{273} }[/tex]

         v = 345.5 m / s

c) In the exercise they indicate that the flute is a tube with the two ends open, so that at each end there is a belly, the resonance is

        λ / 2 = L

        λ = 2L

        λ = 2 0.668

        λ = 1,336 m

b) let's apply the relationship between speed, wavelength and frequency

        v = λ f

        f = v /λ

        f = 345.5 / 1.336

        f = 183.8 Hz

Answer:

20m/s^2

Explanation:

Answer:

If the newly formed metamorphic rock continues to heat, it can eventually melt and become molten (magma). When the molten rock cools it forms an igneous rock.

Explanation:

Answer:

Prokaryotes are single-celled organisms that do not have a nucleus or any membrane-bound organelles. Eukaryotes are single-celled or multi-celled organisms that do contain a nucleus and membrane-bound organelles

Answer:

[tex]a=-3\ m/s^2[/tex]

Explanation:

Given that,

Initial speed of a train, u = 12 m/s

Final speed of a train, v = 9.6 m/s

Time taken, t = 0.8 s

We need to find the average acceleration of the train. We know that the rate of change of velocity is equal to acceleration. So,

[tex]a=\dfrac{v-u}{t}\\\\a=\dfrac{9.6-12}{0.8}\\\\a=-3\ m/s^2[/tex]

So, the average acceleration of the train is equal to [tex]-3\ m/s^2[/tex].

Answer:

3 times louder

Explanation:

The Loudness in decibel Db  L = 10㏒(I/I₀)  where I = sound intensity level and I₀ = threshold of hearing = 10⁻¹² W/m².

Now, for Jessica, I₁ = sound intensity level of Jessica's music = 10⁻⁹

and I₂ = sound intensity level of Braylee's music = 10⁻³

So, substituting the variables into the equation, we have

L₁ = 10㏒(I₁/I₀)

L₁ = 10㏒(10⁻⁹/10⁻¹²)

L₁ = 10㏒(10³)

L₁ = 3 × 10㏒10

L₁ = 30㏒10

L₁ = 30 dB

Now, for Braylee, I₂ = sound intensity level of Braylee's music = 10⁻³

So, substituting the variables into the equation, we have

L₂ = 10㏒(I₁/I₀)

L₂ = 10㏒(10⁻³/10⁻¹²)

L₂ = 10㏒(10⁹)

L₂ = 9 × 10㏒10

L₂ =90㏒10

L₂ = 90 dB

So, the number of times Braylee's music is louder than Jessica's music is L₂/L₁ = 90 dB/30 dB = 3

So, Braylee's music is 3 times louder than Jessica's music

Answer:

3 times louder than Jessica's music

Explanation:

Answer:

Maximum pressure = 4450 N/m²

Explanation:

We'll begin by calculating the volume of the block. This can be obtained as follow:

Volume (V) = 5 cm × 3 cm × 2 cm

V = 30 cm³

Next, we shall determine the mass of the block. This can be obtained as follow:

Density = 8.9 g/cm³

Volume = 30 cm³

Mass =?

Density = mass /volume

8.9 = mass / 30

Cross multiply

Mass = 8.9 × 30

Mass = 267 g

Next, we shall covert 267 g to Kg.

1000 g = 1 Kg

Therefore,

267 g = 267 g × 1 Kg / 1000

267 g = 0.267 Kg

Thus, the mass of the block is 0.267 Kg

Next, we shall determine the force.

Force of gravity (g) = 10 N/Kg

Mass (m) = 0.267 Kg

Force (F) =?

F = mg

F = 0.267 × 20

F = 2.67 N

Next, we shall determine the minimum area since we are trying to obtain the maximum pressure. This can be obtained as follow:

Minimum area = 3 cm × 2 cm

Covert each measurement to metre (m) by dividing each measurement by 100

Minimum area = 0.03 m × 0.02 m

Minimum area = 0.0006 m²

Finally, we shall determine the maximum pressure. This can be obtained as follow:

Force (F) = 2.67 N

Minimum area = 0.0006 m²

Maximum pressure =?

Maximum pressure = Force /minimum area

Maximum pressure = 2.67 / 0.0006

Maximum pressure = 4450 N/m²

Answer:

Average velocity = 18 m/s

Explanation:

Given the following data;

Initial velocity = 10m/s

Acceleration = 2m/s²

Time = 4 seconds

To find the average velocity, we would use the first equation of motion;

[tex] V = U + at[/tex]

Where;

V is the final velocity.

U is the initial velocity.

a is the acceleration.

t is the time measured in seconds.

Substituting into the equation, we have;

V = u + at

V = 10 + 2*4

V = 10 + 8

V = 18 m/s