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3 years ago

A runner completes a 400-m race in 43.9 s. In a 100-m race, he finishes in 10.4 s. In which race was his speed faster?

Mathematics

2 answers:

Sveta_85 [38]3 years ago

5 0

Answer:

100m race

Step-by-step explanation:

because 10.4 x 4 because 100m and 400m right 10.4x4=41.6 and 43.9 so obviously the 100m race is faster.

Lunna [17]3 years ago

3 0

Answer:

Faster speed is in 100-m race

Step-by-step explanation:

400/43.9 = 9.1116173121 m/s

100/10.4 = 9.6153846154 m/s

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Pi: Irrational
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and -1/2 is rational.
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3 years ago

The average customer at Longhorn Steakhouse spends $26.00 per meal with a

ElenaW [278]

Key details

$26.00 per meal

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2 years ago

Suppose that the relation G is defined as follows.

Serga [27]

G:{3,4,6}->{0,9}

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2 years ago

A car has mass 1500 kg and is traveling at a speed of 35 miles/hour. what is its kinetic energy in joules? (Be sure to convert m

photoshop1234 [79]

Answer:

Factor by which kinetic energy increase = 4 times

Step-by-step explanation:

Given,

Mass of the car, v1 = 1500 kg

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= 15.64 m/s

Initial kinetic energy of the car is given by,

$k_1\ =\ \dfrac{1}{2}.m.v_1^2$

$=\ \dfrac{1}{2}\times 1500\times (15.64)^2\ joule$

= 183606.46 J

Final velocity of car v2 = 70 miles/hour

$=\dfrac{70\times 1609.34}{3600}$

= 31.29 m/s

So, final kinetic energy of car is given by

$k_2\ =\ \dfrac{1}{2}.m.v_2^2$

$=\ \dfrac{1}{2}\times 1500\times (31.29)^2$

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Now, the ratio of final to initial kinetic energy can be given by,

$\dfrac{k_2}{k_1}=\ \dfrac{734425.84}{183606.46}$

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2 years ago

Which value completes the table?

larisa [96]

-17 -35
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3 years ago

Read 2 more answers