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3 years ago

EASY!!!!!!!!!- Why is Spacex's rockets better than normal rockets? Give 6 points

Engineering

2 answers:

kozerog [31]3 years ago

6 0

Answer:

What makes spacex rockets so special?

First privately funded fully liquid-fueled rocket to reach orbit. First privately developed liquid-fueled rocket to put a commercial satellite in orbit. First private company to successfully launch, orbit, and recover a spacecraft. First private company to send a spacecraft to the International Space Station (ISS).

Explanation:

Unmatched Performance. With more than 5 million pounds of thrust at liftoff, Falcon Heavy is the most capable rocket flying. By comparison, the liftoff thrust of the Falcon Heavy equals approximately eighteen 747 aircraft at full power.

Eduardwww [97]3 years ago

4 0

Answer:

its a space rocket not a normal one .so if the normal ones can be destroyed this can not

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Two vertical, parallel clean glass plates are spaced a distance of 2mm apart. if the plates are placed in water, how high will t

Ulleksa [173]

Answer with Explanation:

The capillary rise in 2 parallel plates immersed in a liquid is given by the formula

$h=\frac{2\sigma cos(\alpha )}{\rho gd}$

where

$\sigma$ is the surface tension of the liquid

$\alpha$ is the contact angle of the liquid

$\rho$ is density of liquid

'g' is acceleratioj due to gravity

'd' is seperation between thje plates

Part a) When the liquid is water:

For water and glass we have

$\sigma =7.28\times 10^{-2}N/m$

$\alpha =0$

$\rho _{w}=1000kg/m^3$

Applying the values we get

$h=\frac{2\times 7.28\times 10^{-2}cos(0)}{1000\times 9.81\times 2\times 10^{-3}}=7.39mm$

Part b) When the liquid is mercury:

For mercury and glass we have

$\sigma =485.5\times 10^{-3}N/m$

$\alpha =138^o$

$\rho _{w}=13.6\times 10^{3}kg/m^3$

Applying the values we get

$h=\frac{2\times 485.5\times 10^{-3}cos(138)}{13.6\times 1000\times 9.81\times 2\times 10^{-3}}=-2.704mm$

The negative sign indicates that there is depression in mercury in the tube.

4 0

3 years ago

What is a calibration? What are the four types of instrument errors?

Nastasia [14]

Answer and Explanation:

Calibration can be defined as a process where the accuracy of an instrument is measured and are compared with the known and set standards for calibration.

The instrument errors can be defined any deflection from the true value in the measurement or we can say that any difference between measured value and actual or true value results in instrument errors.

The instrument errors are further classified into 4 types:

a). Random errors :

These error arise as the result of random, unpredictable or irregular changes in an experimental set up.

b). Systematic errors :

These errors arises as a result of fault in the instrument or as a result of the effects of some external factors.

c). Gross errors:

These errors are a result of human errors in measurement while recording the reading, etc

d). Zero errors:

This error arises when the reading of the instrument is false while the measured value is equal to zero.

This is when the needle of an ammeter or voltmeter is not at zero but somewhere above or below it when the supply is not given.

7 0

4 years ago

Sealers come in two general varieties they are

horsena [70]

Answer:

Sealers that are film-forming (meaning they leave a sheen on the surface) come in two types — solvent-based and water-based

4 0

3 years ago

A cylindrical specimen of steel has an original diameter of 12.8 mm. It is tested in tension its engineering fracture strength i

Mama L [17]

Answer:

a) The ductility = -30.12%

the negative sign means reduction

Therefore, there is 30.12% reduction

b) the true stress at fracture is 658.26 Mpa

Explanation:

Given that;

Original diameter $d_{o}$ = 12.8 mm

Final diameter $d_{f}$ = 10.7

Engineering stress $\alpha _{E}$ = 460 Mpa

a) determine The ductility in terms of percent reduction in area;

Ai = π/4( $d_{o}$ )² ; Ag = π/4( $d_{f}$ )²

% = π/4 [ ( ( $d_{f}$ )² - ( $d_{o}$ )²) / ( π/4 ( $d_{o}$ )²) ]

= ( ( $d_{f}$ )² - ( $d_{o}$ )²) / ( $d_{o}$ )² × 100

we substitute

= [( (10.7)² - (12.8)²) / (12.8)² ] × 100

= [(114.49 - 163.84) / 163.84 ] × 100

= - 0.3012 × 100

= -30.12%

the negative sign means reduction

Therefore, there is 30.12% reduction

b) The true stress at fracture;

True stress $\alpha _{T}$ = $\alpha _{E}$ ( 1 + $E_{E}$ )

$E_{E}$ is engineering strain

$E_{E}$ = dL / Lo

= (do² - df²) / df² = (12.8² - 10.7²) / 10.7² = (163.84 - 114.49) / 114.49

= 49.35 / 114.49

$E_{E}$ = 0.431

so we substitute the value of $E_{E}$ into our initial equation;

True stress $\alpha _{T}$ = 460 ( 1 + 0.431)

True stress $\alpha _{T}$ = 460 (1.431)

True stress $\alpha _{T}$ = 658.26 Mpa

Therefore, the true stress at fracture is 658.26 Mpa

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3 years ago

The fumes from<br> are extremely hazardous<br> Cement<br> Does cement have fumes

IRINA_888 [86]

Answer:

Cement is largely made up of calcium oxide. Cement can harden in the gastrointestinal tract and cause obstruction. Inhaling cement dust can cause coughing, wheezing, and difficulty breathing. The best prevention is to avoid or limit contact with cement.

Explanation:

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3 years ago