What is the number at the end of an isotope’s name? atomic number neutron number mass number electron number

Answer:

The magnitude of [tex]\vec b[/tex] is approximately 5.774.

Explanation:

According to the definition of dot product:

[tex]\vec a\bullet \vec b = \|\vec a \|\cdot \|\vec b\|\cdot \cos \theta[/tex]

Where:

[tex]\|\vec a\|[/tex], [tex]\|\vec b\|[/tex] - Norms (or magnitudes) of [tex]\vec a[/tex] and [tex]\vec b[/tex], dimensionless.

[tex]\theta[/tex] - Internal angle between [tex]\vec a[/tex] and [tex]\vec b[/tex], measured in sexagesimal degrees.

The magnitude of [tex]\vec b[/tex] is therefore cleared:

[tex]\|\vec b\| = \frac{\vec a \bullet \vec b}{\|\vec a\|\cdot \cos \theta}[/tex]

Given that [tex]\vec a \bullet \vec b = 20[/tex], [tex]\|\vec a\| = 4[/tex] and [tex]\theta = 30^{\circ}[/tex], the magnitude of [tex]\vec b[/tex] is:

[tex]\|\vec b\| = \frac{20}{4\cdot \cos 30^{\circ}}[/tex]

[tex]\|\vec b\| \approx 5.774[/tex]

The magnitude of [tex]\vec b[/tex] is approximately 5.774.

Given:-

A block of wood measures 12cm x 5cm x 10cm.

To be calculated:-

Calculate the volume in (i) cm3 (ii) m3

Solution:-

Case 1 :

Volume of wood = 12cm x 5cm x 10cm

= 600 cm³

Case 2 :

12 cm = 12/100 = 0.12 m

5 cm = 5/100 = 0.05 m

10 cm = 10/100 = 0.01 m

Volume of wood = 0.12 × 0.05 × 0.01

= 0.00006 m³

Answer:

34.8°

Explanation:

Given the following :

Number of lines (N) = 587mm

529mm to m = 587*1000 = 587000 per meter

d = 1 / N ; 1/587000 = 0.00000170357

Wavelength of light waves :

λ1 = 497nm = 497 × 10^-9 m

λ2 = 251nm = 251 × 10^-9 m

Angular position in 3rd order; m=3

For

λ1 ; dsinθ3 = 3λ1 ;

λ2 = dsinθ3 = 3λ2

Substituting values

dsinθ3 = 3λ1 =

0.00000189 * sinθ3 = 3 * 497 × 10^-9

θ3(1) = sin^-1(1491 * 10^-9 / 0.00000170357)

θ3(1) = sin^-1(0.8752208)

θ3(1) = 61.07°

λ2 = dsinθ3 = 3λ2

0.00000189 * sinθ3 = 3 * 251 × 10^-9

θ3(2) = sin^-1(753 * 10^-9 / 0.00000170357)

θ3(1) = sin^-1(0.4420129)

θ3(1) = 26.23°

Angular separation :

61.07° - 26.23° = 34.84°

34.8°

Answer:

mass

Explanation:

Density is the measure of how much mass of a substance is squeezed into a given volume of that substance. It is the mass per unit volume, and substances with lesser density will float in materials with denser density. Buildings are generally more obviously denser that air, if not we'll see then float upwards into the atmosphere, but that is not the case. Different liquids too can separate and form layers on one another due to their differences in volume.

Answer:

1 Volt

Explanation:

The resistors have resistance R = 1 kΩ each = 1 x 10^3 Ω each

The current through the voltage source I= 2 mA = 2 x 10^-3 A

The resistors are in parallel, son the total resistance will be

[tex]\frac{1}{R_{T}}[/tex] = [tex]\frac{1}{R_{1}} + \frac{1}{R_{2}}[/tex]

[tex]\frac{1}{R_{T}}[/tex] = 1/1 kΩ  + 1/1 kΩ

[tex]\frac{1}{R_{T}}[/tex]  = 2/1 kΩ

[tex]R_{T}[/tex] = 1 kΩ ÷ 2 = 0.5 kΩ = 500 Ω

From V = IR

where V is the voltage

I is the current

R is the resistance

substituting, we have

V = 500 x 2 x 10^-3 = 1 V   This is the voltage across each resistor

Answer:

Densidad de la placa = 20 g/cm³.

La placa no es de oro.

Explanation:

Para encontrar la densidad de la placa rectangular primero debemos hallar su volumen:

[tex] V = 2 mm*10 mm*50 mm = 1000 mm^{3}*\frac{1 cm^{3}}{(10 mm)^{3}} = 1 cm^{3} [/tex]      

Ahora, encontremos al densidad de la placa:

[tex] d = \frac{m}{V} = \frac{20 g}{1 cm^{3}} = 20 g/cm^{3} [/tex]

Dado que la densidad del oro es 19.32 g/cm³ y que la densidad de la placa rectangular calculada es 20 g/cm³, podemos decir que dicha placa no es de oro.                  

Espero que te sea de utilidad!

Answer:

Football

Explanation:

Answer:

Hockey

Explanation:

The answer is hockey because in order to play hockey you have to have a lot of safety equipment because people play hockey by being very close to one another. Also, getting hurt during playing hockey without proper equipment can cause many damages to your body.

Hope this helps! :D

Explanation:

Momentum = mass × velocity

p = mv

p = (950 kg) (10.0 m/s)

p = 9500 kgm/s

Answer:

A 'kink' in the glass tube which breaks the mercury as it contracts, storing the highest temperature reading. The glass tube is shaped like a lens to magnify the thin mercury thread. Shaking the thermometer resets the mercury back into the bulb.

Kink in the Mercury thermometer helps to prevents the falling of mercury present in capillary  tube into bulb. It ensures that the user takes the correct reading of temperature. That's the reason a person before taking a new reading must give a sudden shake to the clinical thermometer so that the mercury level comes to normal .

Answer:

Both

Explanation:

Explanation:

If the micrometer is still in the working condition, it will be hard for the observer to find its accuracy or precision, which could be matched with the meter stick. Its accuracy can be compromised in comparison with the undamaged micrometer, but it would be more chances of highly precise.

The error which is find in the damaged micrometer would be less than as compared to the width of the hash marks on the stick.

Answer:

The bent micrometer will be more precise but less accurate than the meterstick

Explanation:

Answer:

Explanation:

The set up will be a right angle triangle (an inclined plane). The height of the inclined plane is the opposite side of the triangle while the distance traveled by the car along the slope will be the hypotenuse with angle of inclination of 10°.

Using the SOH trigonometry identity i.e sinθ = opposite/hypotenuse

sin 10° = opposite/30

opposite = 30sin10°

opposite = 5.21 miles

Hence the car must have traveled 5.21 miles up the hill before starting to roll back down.

Answer:

A 2

Explanation:

Scaling deals with measurements.

for example, the question says, 1 : 44. Assuming we're using cm : m, this is inferring that, 1 centimeter on the model will represent 44 meters in real life. This means, the number of windows in the real tree will be carried down to the model, only the sizes would be reduced.

if a window in the real tree measures 44 meters, then it would be scaled down to be 1 centimeter on the model.

irrespective, models doesn't change the number of features, only the dimensions.

Answer:

same acceleration

Explanation:

Answer:

-3 m

Explanation:

Displacement is the final position minus the initial position.

Δx = x − x₀

Δx = -3 m − 0 m

Δx = -3 m

Answer:

The velocity at impact is 222.2 m/s

Explanation:

The given information are;

The time at which the woman heard the sound of the coin after dropping it into the wishing well = 30 seconds

The average speed of sound in air = 344 m/s

The time in which the dime travel = t₁

The time in which the sound travel = t₂

1/2 × 9.8 × t₁² = 344 × t₂

t₁ + t₂ = 30

4.9·t₁² = 344 × (30 - t₁)

4.9·t₁² + 344·t₁ - 10320 = 0

Which gives -344±

[tex]t_1 = \dfrac{-344\pm \sqrt{344^{2}-4\times 4.9 \times 10320}}{2\times 4.9}[/tex]

t₁  = 22.676 seconds or -92.9 seconds

Therefore the correct natural time is t₁  = 22.676 seconds

The velocity at impact, v = g×t₁ = 9.8 × 22.676  = 222.2 m/s

The velocity at impact= 222.2 m/s.

Answer:

Displacement = 7 meters

Explanation:

Given that,

Jaune moves North 15 meters, South 5 meters, then North 8 meters. We need to find the displacement of Jaune.

The attached figure shows the motion of Jaune.

We know that, Displacement = final position - initial position

Initially, Jaune traveled 15 meters due North and finally, he travel 8 meters North.

Displcement = 15 m - 8 m

Displacement = 7 m

So, the displacement of Jaune is 7 meters.

It's a quantitative observation because it includes numerical data.

Answer:

The maximum acceleration of the system is 359.970 centimeters per square second.

Explanation:

The motion of the mass-spring system is represented by the following formula:

[tex]x(t) = A\cdot \cos (\omega \cdot t + \phi)[/tex]

Where:

[tex]x(t)[/tex] - Position of the mass with respect to the equilibrium position, measured in centimeters.

[tex]A[/tex] - Amplitude of the mass-spring system, measured in centimeters.

[tex]\omega[/tex] - Angular frequency, measured in radians per second.

[tex]t[/tex] - Time, measured in seconds.

[tex]\phi[/tex] - Phase, measured in radians.

The acceleration experimented by the mass is obtained by deriving the position equation twice:

[tex]a (t) = -\omega^{2}\cdot A \cdot \cos (\omega\cdot t + \phi)[/tex]

Where the maximum acceleration of the system is represented by [tex]\omega^{2}\cdot A[/tex].

The natural frequency of the mass-spring system is:

[tex]\omega = \sqrt{\frac{k}{m} }[/tex]

Where:

[tex]k[/tex] - Spring constant, measured in newtons per meter.

[tex]m[/tex] - Mass, measured in kilograms.

If [tex]k = 12\,\frac{N}{m}[/tex] and [tex]m = 0.40\,kg[/tex], the natural frequency is:

[tex]\omega = \sqrt{\frac{12\,\frac{N}{m} }{0.40\,kg} }[/tex]

[tex]\omega \approx 5.477\,\frac{rad}{s}[/tex]

Lastly, the maximum acceleration of the system is:

[tex]a_{max} = \left(5.477\,\frac{rad}{s})^{2}\cdot (12\,cm)[/tex]

[tex]a_{max} = 359.970\,\frac{cm}{s^{2}}[/tex]

The maximum acceleration of the system is 359.970 centimeters per square second.

Answer:

11 protons, 12 neutrons, 10 electrons

Explanation:

Sodium has an atomic number of 11, so it has 11 protons.

The atomic mass is 23, so there are 23 − 11 = 12 neutrons.

The charge is +1, so there is 1 more proton than electrons, so there are 10 electrons.

Explanation:

Tensional force and gravitational force

Answer:

  -0.166 m/s²

Explanation:

F = Ma

a = F/M = (121 N +186 N)/(1850 kg) = 0.166 m/s²

The acceleration of 0.166 m/s² is in the direction opposite to the direction of travel, so might be considered to be negative.

Answer:

 -0.166 m/s²            

As a 1850 kg car is traveling down a road, it experiences a force of friction of 121 N and a force of air resistance if 186N. If the engine is not applying any force, what is the acceleration of the car

Answer:

Only about 12%–30% of the energy from the fuel you put in a conventional vehicle is used to move it down the road, depending on the drive cycle. The rest of the energy is lost to engine and driveline inefficiencies or used to power accessories. Therefore, the potential to improve fuel efficiency with advanced technologies is enormous.

The amount of heat (H) produced is given by the joule’s law of heating as H= Vlt

Where,

Current, I = 5 A

Time, t = 30 s

Voltage, V = Current x Resistance = 5 x 20 = 100V

H= 100 x 5 x 30 = 1.5 x 10⁴ J.

Therefore, the amount of heat developed in the electric iron is 1.5 x 10⁴J.

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Answer:

(a). Their speed during that run is 10 m/s.

(b). Their velocity is 6.86 m/s

(c). The final position is at 8.91 m.

Explanation:

Given that,

A football player starts at the 40-yard line, and runs to the 25-yard line in 2 seconds.

Suppose, the distance between 40 yard line and 25 yard line is 20 yard.

(a). We need to calculate their speed during that run

Using formula of speed

[tex]v=\dfrac{d}{t}[/tex]

Where. d = distance

t = time

Put the value into the formula

[tex]v=\dfrac{18.288}{2}[/tex]

[tex]v=10\ m/s[/tex]during that run

(b). We need to calculate their velocity

Using formula of speed

[tex]v=\dfrac{\Delta d}{\Delta t}[/tex]

Put the value into the formula

[tex]v=\dfrac{22.86-36.58}{2}[/tex]

[tex]v=-6.86\ m/s[/tex]

Negative sign shows the direction of motion.

(c). If they kept running at that velocity for another 1.3 seconds,

We need to calculate the final position

Using formula of position

[tex]d=vt[/tex]

Put the value into the formula

[tex]d=6.86\times1.3[/tex]

[tex]d=8.91\ m[/tex]

Hence, (a). Their speed during that run is 10 m/s.

(b). Their velocity is 6.86 m/s

(c). The final position is at 8.91 m.

Answer:

[tex] \boxed{ \bold{ \sf{see \: below}}}[/tex]

Explanation:

The force with which any two objects attract each other is called gravitational force. Any three consequences of gravitational force are given below :

Hope I helped!

Best regards!

The gravitational force keeps atmospheric gases available to all living beings, allows the moon to orbit around the earth and the earth to orbit around the sun (causing day and night), and keeps all living beings trapped in the surface of the planet.

Gravity is a fundamental element of nature and can be defined as follows:

Through this, we can conclude that gravity is essential for life on the planet and for the functioning of the universe as a whole. This explains the importance of studying and understanding the gravitational force.

You can find more information about this at the link below:

https://brainly.com/question/9571572?referrer=searchResults

Answer:

A. The gravitational force is greater than the drag.

Explanation:

Remember that the second Newton's law says that:

F = m*A

Force equals mass times acceleration.

With this we will see that the correct option is:

"The gravitational force is greater than the drag."

We know that the ball is accelerating downwards, and there is no horizontal motion. Because the acceleration is downwards, we know that the net force must be downwards (for the second law).

Now, what must be true about the net forces acting on the ball? let's analyze each statement:

1) "The gravitational force is greater than the drag."

The gravitational force is what causes the objects to fall down to the ground, so if the ball is falling, this will always be true.

2) " The net force on the ball is zero."

We know that the ball is accelerating, thus the net force can not be zero, this is false.

3) "The drag is greater than the gravitational force. "

This is the opposite to the first option, this is false.

4) "The net force on the ball is directed upward."

The acceleration and the net force have the same direction, if the ball is accelerating downwards, then the net force is directed downwards. This is false.

Then the only true statement is the first one:

"The gravitational force is greater than the drag."

If you want to learn more, you can read:

https://brainly.com/question/19860811

Answer:

The stratosphere is responsible for absorbing the most UV radiation.

Explanation:

Hope it will help you:)

The Stratosphere is responsible for absorbing the most UV radiation.

Thus, the Stratosphere is responsible for absorbing the most UV radiation.

Hence, Option B is the correct answer.

Learn more about Stratosphere,

https://brainly.com/question/11928081

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Answer:

64,000 centimeters =640 meters

Answer:

640 metres

Explanation:

100 cm = 1 m

1 cm = 1/100 m

64000 cm = 64000 × 1/100 metres

= 640 metres.

HOPE IT HELPS ◉‿◉

Explanation:

Pressure = Height * Density * acc. due to gravity

P = 2 * 680 * 9.8 = 13, 328 Pa

Answer:

13328pa

Explanation:

p = hgd

h = height = 200cm = 2m

g = 9.8m/s²

d = density = 680kg/m³

p = pressure

p = 2 x 9.8 x 680 = 13328pa