Acceleration is best defined as the rate of change of what object?

How much does it cost to install led lights in car?

Goryan [66]

<span>about $137.00 (plug n play) http://store.racer-union.com try this web site they are the cheapest by about 100 dollars.</span>

3 0

3 years ago

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Can any ideal gas power cycle have a thermal efficiency greater than 55 percent when using thermal energy reservoirs at 627∘C at

Yanka [14]

Answer:

Since the maximum thermal efficiency is higher than 55 percent, there can be a power cycle with these reservoir temperature with an efficiency higher than 55 percent.

Explanation:

The maximum thermal efficiency is determined from the given temperature

nth Carnot = 1- TL/TH

Where TL= 17+273= 290k

TH= 627*273= 900K.

nth Carnot = 1- 290/900 = 0.68

0.68*100 = 68 percent

8 0

3 years ago

In March 1999 the Mars Global Surveyor (GS) entered its final orbit about Mars, sending data back to Earth. Assume a circular or

shusha [124]

Answer: $5.944\times 10^{23}\ kg$

Explanation:

Given

Time period $T=7.08\times 10^3\ s$

Orbital speed $v=3.40\times 10^3\ m/s$

mass of GS $m_{GS}=930\ kg$

Radius of Mars $r=3.43\times 10^6\ m$

Consider the mass of mars is M

Here, Gravitational pull will provide the centripetal force

$F_G=F_c$

$\dfrac{GMm_{GS}}{r^2}=\dfrac{m_{GS}v^2}{r}\\M=\dfrac{v^2\cdot r}{G}\\M=\dfrac{(3.43\times 10^3)^2\cdot 3.43\times 10^6}{6.67\times 10^{-11}}$

$M=5.944\times 10^{23}\ kg$

5 0

3 years ago

IP A spark plug in a car has electrodes separated by a gap of 6.5×10−2 in . To create a spark and ignite the air-fuel mixture in

emmainna [20.7K]

Answer:

a.) $V=5283.2 \ V$

b.) $V=4064\ V$

Explanation:

<u>Electric Field and Potential Difference</u>

There are several conditions that must be met for a spark to be created into an air gap. Once the physical conditions are fixed, a minimum electric field is necessary for the spark to be initiated. Let s be the separation between the electrodes and V their potential difference. The electric field is

a.)

$\displaystyle E=\frac{V}{s}$

Solving for V

$V=E.s$

The separation is

$s= 5.5\cdot 10^{-2}\ in=0.001651 \ m$

Thus the potential difference is

$V=3.2\cdot 10^{6}\ V/m\times 0.001651 \ m$

$V=5283.2 \ V$

b.) If the separation was greater, the applied voltage needs to be greater if the electric field has to be constant. One possible measure to keep electrodes as close as possible is to build them as sharp edges. It gives the spark an easier path to travel to.

If the separation is 0.05 inches =0.00127 m

$V=3.2\cdot 10^{6}\ V/m\times 0.00127 \ m$

$V=4064\ V$

7 0

3 years ago

What missions have been sent to explore Venus and what did they discover

faust18 [17]

Answer:

See below

Explanation:

Venus Express (2005 - 14)
Galileo (1989 - 90): As it flew by Venus on its way to Jupiter, it collected measurements of charged particles, dust and magnetism, infrared and ultraviolet spectral observation, data for infrared lower - atmosphere maps, and 81 camera images
Magellan (1989 - 90)
Vega 1 (1984 - 85)
Vega 2 (1984 - 85)
Venera 4 (1964): Atmosphere made up of entirely carbon dioxide, found that temperatures ranged from 40 degrees Celsius high up in the atmosphere to 280 degrees Celsius closer to the surface, and pressures ranged 15 to 22 atmospheres
Venera 6 (1969)
Venera 7 (1970): Became first spacecraft to return data from another planet and reported surface temperature of 475 degrees Celsius and atmospheric pressure 90 times greater than Earth's
Venera 8 (1972)
Venera 9 (1975)
Venera 10 (1975): Transmitted images from the surface
Venera 11 (1978): Sent back evidence of thunder and lightning as well as presence of carbon monoxide in lower altitude
Venera 12 (1978)
Venera 13 (1981 - 82): Returned first color images and found out the pressure was 84 times the pressure at sea level on Earth and the temperature was 457 degrees Celsius, before succumbing to them
Venera 14 (1981 - 82): Sent back images of Venus
Venera 15 (1983): Created radar map of Venus with Venera 16
Venera 16 (1983)
Pioneer Venus 1 (1978): Radar mapped nearly the entire planet, resolving features as small as 80 kilometers
Pioneer Venus 2 (1978): Consisted of 4 separate atmospheric probes
Mariner 2 (1962): Flyby attempt discovered ground temperatures as high as 428 degrees Celsius, but detected no water vapor or evidence of a magnetic field around planet
Mariner 5 (1967): During flyby, measured surface temperature of 267 degrees Celsius
Mariner 10 (1973 - 74): Took first ultraviolet images of Venus on way to Mercury
Akatsuki/Venus Climate Orbiter (2010 - today)

These are just some of the successful attempts by probes at or near Venus.

Vote Brainliest, Thx :)

6 0

3 years ago

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