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2 years ago

What are close-toed shoes least likely to provide protection against?

Physics

2 answers:

Dennis_Churaev [7]2 years ago

8 0

Hydrogen gas is harmless to your feet so since you don’t need protection against it that seems the best answer.

VLD [36.1K]2 years ago

6 0

Answer: Hydrogen gas produced during a reaction

Explanation:

A chemical lab is a place where potential hazards oriented to the use of the chemicals can happen. These chemicals can cause injuries to the skin when come in contact directly or indirectly. Therefore, protective safety measures should be taken so as to protect oneself while working in a chemical lab.

Among the options given, hydrogen gas produced during a reaction is the correct option. This is because of the fact that close-toed shoes can provide protection against all types of chemical fluids. But the gases like hydrogen gas are reactive and they are permeable inside the shoe material hence, may cause damage.

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A singly charged ion (q=−1.6×10−19) makes 7.0 rev in a 45 mT magnetic field in 1.29 ms. The mass of the ion in kg is

insens350 [35]

Answer:

$m=1.47\times 10^{-24}\ Kg$

Explanation:

Given that,

Charge, $q=1.6\times 10^{-19}\ C$

Revolution = 7 rev

magnetic field, B = 45 mT

Time, t = 1.29 ms

We need to find the mass of the ion. Let m be the mass. The formula for the mass in terms of time period is given by :

$m=\dfrac{qBT}{2\pi}\\\\m=\dfrac{1.6\times 10^{-19}\times 45\times 10^{-3}\times 1.29\times 10^{-3}}{2\pi}\\\\m=1.47\times 10^{-24}\ Kg$

So, the mass of the ion is equal to $1.47\times 10^{-24}\ Kg$ .

4 0

2 years ago

Q2. Fill in the spaces with the correct form of the verb in future progressive tense.

-BARSIC- [3]

Answer:

will you fed the dogs while mom is in the hospital?

Explanation:

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8 0

3 years ago

The mercalli scale is a scale from ________.

Mashcka [7]

<h2>Answer: 1 to 12. </h2>

<u>The Mercalli seismological scale is a scale of 12 degrees</u>, where 1 is very weak and 12 catastrophic.

This scale owes its name to the Italian physicist Giuseppe Mercalli and was developed to assess the intensity of earthquakes through the effects and damages caused to different structures.

This means the <u>Mercalli scale measures how strong a earthquake has been by </u><u>its consequences and not by its magnitude</u><u>, therefore it is based on </u><u>empirical observations.</u>

6 0

2 years ago

What force does it take to accelerate a 9.2 kg object 7.0 m/s^2?

Ulleksa [173]

Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question

mass = 9.2 kg

acceleration = 7 m/s²

We have

force = 9.2 × 7 = 64.4

We have the final answer as

Hope this helps you

5 0

2 years ago

A 100 kg mass is pulled along a frictionless surface by a horizontal force F such that its acceleration is 10.0 m/s2. A 20 kg ma

DIA [1.3K]

Answer

given,

mass = 100 kg

acceleration = 10 m/s²

A mass 20 kg slides over 100 kg block

acceleration = 3 m/s²

horizontal friction exerted by the 100 kg block on 20 kg

using newton's second law

F - f = 0

F = f

f = ma

f = 20 × 3

f = 60 N

now net force acting on the 100 kg block

F_net = m a

F_net = 100 x 10

F_net = 1000 N

after 20 kg block falls the acceleration of the bock

F = 1000 +60

F = 1060 N

acceleartion on the block

$a = \dfrac{F}{m}$

$a = \dfrac{1060}{100}$

a = 10.60 m/s²

3 0

3 years ago