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givi [52]
3 years ago
14

a 13 kg sled is moving at a speed of 3.0 m/s. at which of the following speedss will the sled have tace as mucb as the kinetic

Physics
1 answer:
mamaluj [8]3 years ago
6 0
A 13-kg sled is moving at a speed of 3.0 m/s. At which of the following speed will the sled have twice as much kinetic energy?

4.2 m/s
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Explanation:

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4 years ago
Which part of the telescope gathers light from a faraway object and reflects it to another mirror?
melamori03 [73]

Answer:

2)primary mirror

Explanation:

A reflecting telescope contains mirrors and a refracting telescope contains lenses. There are two mirrors in basic reflecting telescope. The primary mirror gathers the light from the bodies at distance and reflects it towards the secondary mirror. The secondary mirror is placed at such an angle that it then reflects the light towards the eye piece and we can observe the faraway body.

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Driving on asphalt roads entails very little rolling resistance, so most of the energy of the engine goes to overcoming air resi
trapecia [35]

Answer:

a)  F_p=882N

b)  P=4410W

c)  V_p'=24135 ,n=15.2\%

Explanation:

From the question we are told that:

Mass M=1500kg

Velocity v=4.9m/s

Coefficient of Rolling Friction \mu=0.06

a)

Generally the equation for The Propulsion Force is mathematically given by

 F_p=\mu*mg

 F_p=0.06*1500*9.81

 F_p=882N

b)

Therefore Power Required at

 V_p=5.0m/s

 P=F_p*V_p

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c)

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 V_p'=15*\frac{1609}

 V_p'=24135

Generally the equation for Work-done is mathematically given by

 W=F_p*V_p'

 W=882*15*1609

 W=2.13*10^7

Therefore

Efficiency

 n=\frac{W}{E}*100\%

Since

Energy in one gallon of gas is

 E=1.4*10^8J

Therefore

 n=\frac{2.1*10^7}{1.4*10^8}*100\%

 n=15.2\%

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3 years ago
What kind of creatures/beings are tieflings?
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Answer:

Tieflings are classed as humanoids, not fiends (and technically it appears to be a bloodline curse, not even having any fiendish blood). Note that being classed as a fiend would also mean the character would be immune to spells that target humanoids, such as Hold Person.

Explanation:

-Hope this Helps

PLS MARK ME BRAINLIEST

(pressing the crown button underneath)

thx

4 0
2 years ago
Helpppppppppppppppppppppppp​
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Can you show the question it's not clear

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