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3 years ago

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(AKS 1a) In 1996 Eddie Cheever recorded the fastest lap ever at the Indianapolis 500. His car completed one lap (4023 meters) in

a record time of 38.1 seconds. What was Eddie's average velocity during this lap?

1 answer:

Nataliya [291]3 years ago

3 0

Answer:

hi

Explanation:

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A car is traveling at 20 km in 15 minutes. What is its average velocity

yarga [219]

The velocity is 4374.45 m/s.
I got the answer by using v=d/t.
20,000meters / 25min= 4,374.45 m/s.

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2 years ago

An object of mass 10 kg is in a circular orbit of radius 10 m at a

Paladinen [302]

A :-) F = mv^2 by t
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r = 10 m
v = 10 m/s
Solution -
F = mv^2 by t
F = 10 x 10^2 by 10
F = 10 x 100 by 10
( cut 10 and 10 because 10 x 1 = 10 )
F = 100 N

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3 years ago

Difference between effort and load

scoray [572]

<u>Answer</u>:

Effort is the unaltered force. Load is the altered force.

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3 years ago

Given that o.2i+bj+o.4k is a unit vector,what is the value of b?

pishuonlain [190]

Answer:

b = 0.89

Explanation:

The given vector is, $A=0.2i+bj+0.4k$

A is a unit vector

We need to find the value of b.

For a unit vector, |A| = 1

So,

$0.2^2+b^2+0.4^2=1\\\\0.04+b^2+0.16=1\\\\0.2+b^2=1\\\\b^2=1-0.2\\\\b=0.89$

So, th value of b is 0.89.

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3 years ago

Fused quartz possesses an exceptionally low coefficient of linear expansion, 5.50 × 10 − 7 ( ∘ C ) − 1 . Suppose a bar of fused

EastWind [94]

To solve this problem it is necessary to apply the concepts related to thermal linear expansion. Mathematically this concept can be expressed under the Equation:

$\Delta L = L_0 \alpha \Delta T$

Where,

$L_0 =$ Initial Length

$\alpha =$ Thermal Expanssion constant

$\Delta T =$ Change in Lenght

Our values are given as

$L_0 = 2.99m$

$\alpha = 5.50*10^{-7} ( \∘C )^{-1}$

$\Delta T = T_2-T_1 = 213-20$

Replacing at our equation we have,

$\Delta L = L_0 \alpha \Delta T$

$\Delta L = (2.99) (5.5 x 10^{-7}) (213 - 20)$

$\Delta L = 0.317*10^{-3}m\approx 0.317mm$

Therefore the expantion of the bar is 0.317mm

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4 years ago