State the section of the graph (A, B, C, or D) where the car is moving the slowest.
Explain your answer.
b) Calculate the average speed of the car over the whole journey.
100 points and brainliest

Answer: V = 15 m/s

Explanation:

As  stationary speed gun emits a microwave beam at 2.10*10^10Hz. It reflects off a car and returns 1030 Hz higher. The observed frequency the car will be experiencing will be addition of the two frequency. That is,

F = 2.1 × 10^10 + 1030 = 2.100000103×10^10Hz

Using doppler effect formula

F = C/ ( C - V) × f

Where

F = observed frequency

f = source frequency

C = speed of light = 3×10^8

V = speed of the car

Substitute all the parameters into the formula

2.100000103×10^10 = 3×10^8/(3×10^8 -V) × 2.1×10^10

2.100000103×10^10/2.1×10^10 = 3×108/(3×10^8 - V)

1.000000049 = 3×10^8/(3×10^8 - V)

Cross multiply

300000014.7 - 1.000000049V = 3×10^8

Collect the like terms

1.000000049V = 14.71429

Make V the subject of formula

V = 14.71429/1.000000049

V = 14.7 m/s

The speed of the car is 15 m/s approximately

Answer: 7.36m/s

Explanation:

(Fo- f)/fo = 2v/c

1030/2.10 x 10^10 = 2v/ 3 x 10^10

4.905= 2v/3 x 10^10

Rearrange for v

V = ((1030/2.10 x 10^10) x (3x 10^10)) / 2

V = 7.36 ( right for acellus)

Answer:

I'm not 100% sure tbh but the only thing I think makes sense to represent vibration would be frequency which is measure in Hertz (Hz)

Explanation:

Answer:

Explanation:

a control group

Answer:

Kepler studied the periods of the planets and their distance from the Sun, and proved the following mathematical relationship, which is Kepler's Third Law: The square of the period of a planet's orbit (P) is directly proportional to the cube of the semimajor axis (a) of its elliptical path.

Explanation:

Answer:

D

Explanation:

Just got a 100 on the test

Answer:

a.) The main scale reading is 10.2cm

b.) Division 7 = 0.07

c.) 10.27 cm

d.)  10.31 cm

e.)  10.24 cm  

Explanation:

The figure depicts a vernier caliper readings

a.) The main scale reading is 10.2 cm

The reading before the vernier scale

b.) Division 7 = 0.07

the point where the main scale and vernier scale meet

c.) The observed readings is

10.2 + 0.07 = 10.27 cm

d.) If the instrument has a positive zero error of 4 division

correct reading = 10.27 + 0.04 = 10.31cm

e.)  If the instrument has a negative zero error of 3 division

correct reading = 10.27 - 0.03 = 10.24cm  

Answer:

A.) 0.5 m

B.) 2.5 m

C.) 10 m

Explanation:

Given that the

Spring constant K = 20 N/m

From hooks law

F = Ke

Where

F = force applied

K = spring constant

e = extension

A.) When F = 10 N

Substitute F and K into the formula

10 = 20e

e = 10/20 = 0.5 m

B.) When F = 50 N

50 = 20e

e = 50/20 = 2.5 m

C.) When F = 0.2 KN

0.2 × 1000 = 20e

200 = 20e

e = 200/20 = 10m

Option D because the temperatures there are like 800 degrees Fahrenheit which means it is enough o melt lead so that's the key element that caused Venus and earth to have different environments because energy is key to life.

Answer:

Explanation:

The formula P=VI, just rearrange to find I

So

I=P/V

=75/120

=0.625amps

625mA

Answer:inner

Explanation:

Because that where our ear drum listen to any kind of noise

Answer:

inner

Explanation:

that's where the ear drum is and that's where the sound all come in

Answer: the angle of refraction in the water is 34.2 degrees and then in the glass is 41 degrees approximately

Explanation:

A laser light travels from air (n=1) through water (n=1.33), and then a piece of glass (n=1.55).

If the light first enters the water at an angle of 25.0 degrees (from air to water). That means

The incident angle  = 25 degrees

Using Snell' law

n(air)/n(water) = sin 25/sin R

Where R is the angle of refraction

1/1.33 = sin 25/sin R

Make sin R the subject of formula

Sin R = sin 25 / 0.7518

Sin R = 0.5620

R = sin^-1(0.5620)

R = 34.2 degrees

This angle will be an incident angle when the light is travelling from the water to glass. Using Snell law agains,

1.33/1.55 = sin 34.2/sin R

Cross multiply

1.33 sin R = 0.87122

Make R the subject of formula

Sin R = 0.87122/1.33

Sin R = 0.6550

R = sin^-1(0.6550)

R = 40.9 degrees

Therefore, the angle of refraction in the water is 34.2 degrees and then in the glass is 41 degrees approximately.

Find the attached file for the figure

Answer:

The following bonds breaks:

Ca–O bonds in calcium oxide and H–Cl bonds in hydrochloric acid

Explanation:

When calcium oxide reacts with hydrochloric acid, water and calcium chloride are formed. The reaction is given as:

CaO + 2HCl ⇒ CaCl₂ + H₂O

Where

CaO has an ionic bond between Ca and O because Ca is a metal and O is a non-metal, which results in complete transfer of electrons from calcium to oxygen.

HCL is usually in a gaseous state which has a covalent bond between H and Cl, but HCL acid means HCL in the presence of water, which will have an ionic bond.

Under the given reation, both of these ionic bonds break to form new ones

Answer: K.E = 8.3 J

Explanation:

The given parameters are

Height h = 169.2 m

Mass m = 0.005kg

From conservation of energy, at the top of the monument, the total energy will be kinetic energy which is equal to the potential energy. That is,

K.E = P.E

And

P.E = mgh

Where g = 9.81 m/s^2

Substitutes all the parameters into the formula

P.E = 0.005 × 9.81 × 169.2

P.E = 8.2908 J

Therefore, the kinetic energy (KE) of the nickel in her shirt pocket at the top of the monument is approximately 8.3 Joule.

The kinetic energy (KE) of the nickel in her shirt pocket at the top of the monument is 8.2908 Joules.

Given the following data:

Scientific data:

To calculate the kinetic energy (KE) of the nickel in her shirt pocket at the top of the monument, we would apply the law of conservation of energy.

According to the law of conservation of energy, the kinetic energy (KE) of the nickel is equal to the potential energy (PE) possessed by the nickel at the top of the monument.

Mathematically, this is given by this expression:

[tex]K.E =P.E =mgh[/tex]

Substituting the given parameters into the formula, we have;

[tex]K.E = 0.005 \times 9.8 \times 169.20[/tex]

K.E = 8.2908 Joules.

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Answer:

to prevent any electric shock to the user. (more info below)

Explanation:

The metallic structure of electrical equipment is bound to the earth by means of earth wire, such that any electrical current leakage is transmitted to the field. This stops the consumer from experiencing any electrical shocks. That's why the electrical devices ought to be earthed.

hope this helled!

Answer :

316 Hz

Explanation:

Answer: 7.36

Explanation:

Answer:

1.) Time = 3.5 seconds

2.) Range = 21 m

3.) Velocity = 34.8 m/s

Explanation:

Given that the

Height h = 60 m

Initial velocity U = 6 m/s

1.) The time taken to hit the river for a single droplet of water can be achieved by using second equation of motion

h = Ut + 1/2gt^2

Let assume that the water drops from rest. Therefore, U = 0

60 = 1/2 × 9.8t^2

60 = 4.9t^2

t^2 = 60/4.9

t^2 = 12.24

t = sqrt (12.24)

t = 3.5s

2.) The range of the projectile for a single droplet of water will be calculated by using the formula

R = Ut

Range R = 6 × 3.5 = 20.99

Range = 21 m

3.) The velocity (diagonal) when it hits the water.

Using third equation of motion

V^2 = U^2 + 2gH

Substitute values into the equation

V^2 = 6^2 + 2 × 9.8 × 60

V^2 = 36 + 1176

V^2 = 1212

V = sqrt (1212)

V = 34.8 m/s

Answer:

I think.the frist one

Explanation:

because that only one that make sense to me

A way that a U-235 atom could not fission is 94

235U92 + 0n -1 → 141Te52 + 40Zr+ 0n2 +energy

When the slow moving neutrons are bombarded with the heavy radioactive nuclei, the product is the more number of neutrons are produced with the large amount of energy. This multiplying process is called nuclear fission.

The amount of energy produced in nuclear fission reaction is again used in the next fission process.

The neutron has no charge and has a rest mass. While reacting the U-235 atom with neutron, more number of neutrons are released.

Thus, the correct option is A.

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Answer:

Solenoid with a Metal core

Answer:

Its D

Explanation:

Answer:

.He shouldn't eat:

1.Sugar

2.Fast food

3.Fat

Exercise:

1.Heel touches while lying on the ground

2.Abdominal crunches

3.V ups

3.Planks

Period = 24 hours per spin.

That's 86,400 seconds.

Frequency = 1 spin / 24 hours.

That's 1 spin / 86,400 seconds.

Frequency = 0.00001157 Hz

Answer:

1) When [tex]d_{o}[/tex] < [tex]d_{i}[/tex] (hence  [tex]d_{o}[/tex] < f ) and they are both in front of the mirror (positive), the image will be larger and inverted

2) When [tex]d_{o}[/tex] > [tex]d_{i}[/tex] (and [tex]d_{o}[/tex] < f ) such that they are both positive (in front of the mirror), the image will be smaller and inverted

3) When the image is behind the mirror, for convex mirrors and the object is in front the image will be uptight. The magnification of the image will be the ratio of the image distance to the object distance from the mirror

Explanation:

The position of an object in front of a concave mirror of radius of curvature, R, determines the size and orientation of the image of the object as illustrated in the mirror equation

[tex]\dfrac{1}{f}=\dfrac{1}{d_{o}} + \dfrac{1}{d_{i}}[/tex]

[tex]Magnification, \, m = \dfrac{h_{i}}{h_{o}} = -\dfrac{d_{i}}{d_{o}}[/tex]

Where:

f = Focal length of the mirror = R/2

[tex]d_{i}[/tex] = Image distance from the mirror

[tex]d_{o}[/tex] = Object distance from the mirror

[tex]h_{i}[/tex] = Image height

[tex]h_{o}[/tex] = Object height

[tex]d_{o}[/tex] is positive for an object placed in front of the mirror and negative for an object placed behind the mirror

[tex]d_{i}[/tex] is positive for an image formed in front of the mirror and negative for an image formed behind the mirror

m is positive when the orientation of the image and the object is the same

m is negative when the orientation of the image and the object is inverted

f and R are positive in the situation where the center of curvature is located in front of the mirror (concave mirrors) and f and R are negative in the situation where the center of curvature is located behind the mirror (convex mirrors)

∴ When [tex]d_{o}[/tex] < [tex]d_{i}[/tex] (hence  [tex]d_{o}[/tex] < f ) and they are both in front of the mirror (positive), the image will be larger and inverted

When [tex]d_{o}[/tex] > [tex]d_{i}[/tex] (and [tex]d_{o}[/tex] < f ) such that they are both positive (in front of the mirror), the image will be smaller and inverted

When the image is behind the mirror, for convex mirrors and the object is in front the image will be uptight. The magnification of the image will be the ratio of the image distance to the object distance from the mirror.

Answer: C

Precision

Explanation:

When a quantity is measured two or more different times, and the results are very close to each other, this indeed indicates how precise the value is. That is how exact and accurate it is.

Therefore, a measure of how consistently a result is determined by repeated evaluations is called precision

Answer:

frogs have lungs to breath on land  and gills to  breath underwater that makes a frog different from each other

Ignoring the stress we feel is not a possible thing as long as it persist. We must identify the source that creates stress and try to eliminate or reduce its effect through relaxation techniques.

There isn't a one-size-fits-all approach to managing stress. Your stress-reduction routine will be very different from someone else's depending on the kind and frequency of your stress. However, it's useful to have a toolkit of stress-reduction methods on hand in case you require them.

It's common to have difficult circumstances in life. The daily commute and paying taxes are only two examples of daily pressures. It has an impact on everyone. The key is to learn how to control it so that our stress levels don't become too high.

There are many relaxation techniques to get rid of stresses such as yoga, community work out, music therapy. etc. Be active and control yourselves always and proper food and positive talks make everything out of stress.

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Answer:

Wave frequency can be measured by counting the number of crests or compressions that pass the point in 1 second or other time period. The higher the number is, the greater is the frequency of the wave.

hope this helps u

Answer:

0.2 Hz

Explanation:

45.0 W is the answer

Answer:

Faster

Explanation:

Purple light's frequency is faster than yellow

The frequency of purple light is higher that of yellow light.

The electromagnetic spectrum is the basis for the visual sense of colour. Color perception is connected to an object's light absorption, reflection, emission spectra, and interference, even though color is not an inherent property of matter.

The majority of humans use three different types of cone cells to see color in the visible light spectrum (trichromacy). Other species may have a distinct range of color sensitivity because they have a different number of cone cell types or eyes that are sensitive to a different wavelength, such as bees that can discern ultraviolet.

Different light wavelengths or spectral sensitivity in various cone cell types serve as the basis for animal perception of color, which is then processed by the brain.

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Frequency = speed / wavelength

Frequency = (3 m/s) / (1.2 m)

Frequency = 2.5 /s

That's 2.5 Hz.