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4 years ago

An object is traveling with a constant velocity of 5 m/s. How far will it have gone after 7 s?

Physics

1 answer:

kozerog [31]4 years ago

6 0

<h3>Answer:</h3>

35 meters

<h3>Explanation:</h3>

<u>Data given;</u>

Velocity of an object = 5 m/s
Time taken = 7 s

We are required to calculate how far the object traveled.

We need to know that;

Velocity = Displacement ÷ time

Therefore;

Displacement = Velocity × time

= 5 m/s × 7 s

= 35 m

Therefore; the object traveled 35 meters

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3 years ago

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3 years ago

What is the minimum frequency with which a 200-turn, flat coil of cross sectional area 300 cm2 can be rotated in a uniform 30-mT

sergiy2304 [10]

Answer:

The minimum frequency of the coil is 7.1 Hz

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Given;

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cross sectional area, A = 300 cm² = 300 x 10⁻⁴ m²

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Maximum induced emf is given as;

E = NBAω

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E = NBA2πf

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3 years ago

Which organism makes its own food? A mouse B snake C grass D owl

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3 years ago

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A 1-kg iron frying pan is placed on a stove. The pan increases from 20°C to 250°C. If the same amount of heat is added to a pan

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Here mass of the iron pan is given as 1 kg

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also its temperature rise is given from 20 degree C to 250 degree C

so heat required to change its temperature will be given as

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$Q = 1*s*(250 - 20)$

$Q = 1*s*230$

now if we give same amount of heat to another pan of greater specific heat

so let say the specific heat of another pan is s'

now the increase in temperature of another pan will be given as

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now we have

$\Delta T = (\frac{s}{s'})*230$

now as we know that s' is more than s so the ratio of s and s' will be less than 1

And hence here we can say that change in temperature of second pan will be less than 230 degree C which shows that final temperature of second pan will reach to lower temperature

So correct answer is

<u>A) The second pan would reach a lower temperature.</u>

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3 years ago

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