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3 years ago

7

One of the statements below is correct In an ideal system where all forms of friction are ignored?

1 answer:

noname [10]3 years ago

3 0

Answer:

a.

Explanation:

In a perfect system then energy can be changed from Kinetic to Gravitational Potential and vice versa without any losses. A common form of loss would be thermal energy, so b. is not the answer. c. is invalid as we want these 2 forms of energy to be transferred between, and d. is invalid as these statements c and a contradict each other.

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2. A new racecar track is being created, and the owners want the cars to complete 10

jeka57 [31]

Answer:

0.45 miles

Explanation:

since, car will be running on the edge of track, distance covered in one lap by car will be equal to circumference of track.\

we will use value of pi as 22/7

Circumference for any circular shape is given by $\piD$ $\pi D$

Hence, in one lap $\pi D$ distance will be covered

in 7 laps $7 \pi D$ distance will be covered.

but is given that 7 laps should be equal to 10 miles

so 10 miles will be equal to $7\pi D$

$7\pi D= 10 \ miles\\=> 7*(22/7)* D= 10 \ miles\\=> 22D = 10 \ miles\\=> D = 10/22 \ miles\\=> D = 0.45 \ miles$

Thus, diameter of track will be 0.45 miles to meet the requirement.

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3 years ago

Why does Chelsea see sparks as she removes her clothes from the clothes dryer?

Ne4ueva [31]

Static electricity!

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4 years ago

Read 2 more answers

A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed is 4 m/s. But 3 sec

NikAS [45]

Answer:

67676

Explanation:

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4 years ago

Atruck with a mass of 5280 Kg has an acceleration of 45 m/s/s what is the force acting on the truck?

horrorfan [7]

117.3 I think that’s it mb if that wrong

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3 years ago

ich of the following is not accurate when describing solids? A. The amount of pressure exerted by a solid is solely dependent on

Dafna11 [192]

The amount of solid does not affect how you are describing the solid so a is the answer

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3 years ago