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valentinak56 [21]

3 years ago

9

An ice cube at 0 degrees Celsius is heated until it melts and the water reaches 20 degrees Celsius. The amount if heat needed fo

r this is 5.000x10^3J. What is the mass of the ice cube?

1 answer:

Troyanec [42]3 years ago

4 0

Answer:

20 i guess

Explanation:

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The reaction of ammonia and hydrogen chloride gas:

oee [108]

It's replacement reaction. Hope it helped

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3 years ago

A boy swings a rubber ball attached to a string over his head in a horizontal, circular path. The piece of string is 1.15 m long

gregori [183]

Answer:

v = 16.49 m/s

Explanation:

Given that,

Length of the string, l = 1.15 m

The ball makes 137 complete turns each minute.

We know that, 1 turn = 6.28 rad

137 turns = 860.79 rad

1 min = 60 s

$\omega=\dfrac{860.79\ rad}{60\ s}\\\\=14.34\ rad/s$

We need to find the tangential velocity of the ball. It can be given by

$v=r\omega\\\\=1.15\times 14.34\\\\v=16.49\ m/s$

So, the tangential velocity of the ball is 16.49 m/s.

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3 years ago

What is the concentration, in m/v percent, of a solution prepared from 50 g NaCl and 2.5 L of solution?

Serjik [45]

When we convert the given mass in grams and volume in liters to m/v percent, we recall that m/v percent is expressed as grams/100 milliliters. In this case the expression becomes (50 grams/ 2500 L)*(0.1L/100ml), that is equal to 0.002 grams/ 100 mL. Hence the the concentration is equal to 0.2 m/v percent.

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3 years ago

The graph shows the number of beans eaten by a random zocco. How many light red kidney beans were eaten on Day 7? How many dark

Tems11 [23]

Answer:

day 7 50 and day 8 40

Explanation:

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3 years ago

Read 2 more answers

Which diagram shows how the particles of the solid substance will look after it has absorbed enough heat to melt partially ??

cricket20 [7]

It would be A, the molecules should be closely packed together but arranged randomly. :)

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3 years ago