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2 years ago

What would happen if you added energy to solid bar of gold ?

Physics

1 answer:

kolezko [41]2 years ago

8 0

Thats imposiblie u cant ad energy to gold bar

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A)List the names of three nonmetals you are familiar with in your daily life.

Karo-lina-s [1.5K]

Answer:

food and water

Explanation:

health and starvation and for theist most important thing

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1 year ago

A sample of radiosodium () has a half-life of 15 hr. If the sampleâs activity is 100 millicuries after 24 hr, approximately what

Olegator [25]

Answer : The original activity will be, 303 millicuries.

Explanation :

Half-life = 15 hr

First we have to calculate the rate constant, we use the formula :

$k=\frac{0.693}{t_{1/2}}$

$k=\frac{0.693}{15hr}$

$k=4.62\times 10^{-2}\text{ hr}^{-1}$

Now we have to calculate the time passed.

Expression for rate law for first order kinetics is given by:

$t=\frac{2.303}{k}\log\frac{a}{a-x}$

where,

k = rate constant = $4.62\times 10^{-2}\text{ hr}^{-1}$

t = time passed by the sample = 24 hr

a = initial amount of the reactant = ?

a - x = amount left after decay process = 100 millicuries

Now put all the given values in above equation, we get

$24=\frac{2.303}{4.62\times 10^{-2}}\log\frac{a}{100}$

$a=302.97\text{ millicuries}\approx 303\text{ millicuries}$

Therefore, the original activity will be, 303 millicuries.

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2 years ago

A behavior that is developed by observing others or being taught is

Anit [1.1K]

B. Learned behavior

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2 years ago

Read 2 more answers

_________is a system that uses the reflection of underwater sound waves to detect objects.

abruzzese [7]

Answer:3-Sonar

Explanation:

Sonar system is used to detect the under water objects by using the deflection of sound waves.

Sonar is an acronym of Sound navigation ranging.Two types of sonar sets are used for working: active and passive. The active sonar system pushes out sound signals called pings, and then absorbs the return sound echo. Passive sound sets obtain sound echoes without transmitting their actual sound signals. Submarines are using sonar to track other vessels.

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2 years ago

What does a measured number tell you?

oksano4ka [1.4K]

Answer:

The precision at which the number was measured

Explanation:

The number of digits that you use to record a measurement indicates the precision of the measurement.

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2 years ago