4 years ago

Hydrogen is a colorless, tasteless, and odorless gas.

Physics

2 answers:

Serga [27]4 years ago

7 0

Answer:

This is true.

Explanation:

Crazy boy [7]4 years ago

4 0

Answer:

Hydrogen is a colorless, tasteless, and odorless gas.

(physical)

Hydrogen is very combustible in the presence of oxygen.

(chemical)

Hydrogen is very reactive with most elements.

(chemical)

Hydrogen is the least dense of all elements.

(physical)

Explanation:

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3 years ago

Read 2 more answers

A pendulum of length L = 1 m is released from an initial angle of 15° . After 1000 s, its amplitude is reduced to 2.5º. What is

jonny [76]

Answer:

The value of the time constant is 558.11 sec.

Explanation:

Given that,

Pendulum length = 1 m

Initial angle = 15°

Time = 1000 s

Reduced amplitude = 2.5°

We need to calculate the value of the time constant

Using formula of damping oscillation

$\theta=\theta_{0}e^{\dfrac{t}{\tau}}$

Where, $\theta$ =amplitude

$\theta_{0}$ =amplitude at t = 0

Put the value into the formula

$2.5=15e^{\dfrac{-1000}{\tau}}$

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$ln\dfrac{1}{6}=\dfrac{-1000}{\tau}$

$\tau=\dfrac{1000}{-ln\dfrac{1}{6}}$

$\tau=558.11\ sec$

Hence, The value of the time constant is 558.11 sec.

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