3 years ago

2 t of ferrous scrap at a temperature of 20 degrees is heated to the melting point and melted. How much to consume?

Physics

1 answer:

photoshop1234 [79]3 years ago

3 0

Answer

Calculate the amount of heat needed to melt 2.00 kg of iron at its melting point (1809 K), given that: ?Hfus = 13.80

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Ask Your Teacher Cam Newton of the Carolina Panthers throws a perfect football spiral at 6.9 rev/s. The radius of a pro football

faltersainse [42]

Answer:

$a=159.32\ m/s^2$

Explanation:

It is given that,

Angular speed of the football spiral, $\omega=6.9\ rev/s=43.35\ rad/s$

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The velocity is given by :

$v=r\omega$

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3 years ago

You throw a ball upwards at 22.0 m/s how high will it go?

Alex

Answer:

Time to reach maximum height can be obtained from v=u+at

0=20+(−10)t

t=2s

s=ut+0.5at

=20(2)+0.5(−10)(2)

=20m

Thus, total distance for maximum height is 45 m

s=ut+0.5at

45=0+0.5(10)(t ′ )

′

=3s

Total time= 3+2= 5s

Explanation:

TAKE 22.0 IN PLACE OF 20 U WILL GET YR ANSWER

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A red racecar accelrates at a constant rate of 5 m/s2. How much time does it take to increase its speed from 50 m/s to 60 m/s?

A.17 s

B.0.058 s

C.0.25 s

D.2.0 s

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