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3 years ago

____ waves are often used in heat lamps fill in the blank

Physics

2 answers:

Ludmilka [50]3 years ago

8 0

Heat your answer is Heat.

Hoped I helped.

vredina [299]3 years ago

8 0

The answer to this question is <u>Infrared waves are often used in heat lamps.</u>

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If a fish experiences an acceleration of 4.9 m/s over a period of 1.84 a , what was the change in velocity

Veseljchak [2.6K]

Explanation:

they'll dewwel jss q.v hewn red f quill DC noo

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3 years ago

The type of change that occurs when a solid becomes a liquid is_______.

GenaCL600 [577]

That would be melting. From a liquid to a gas is evaporation, and from a solid directly to a gas is sublimation. From a gas to a liquid is condensation, and from a liquid to a solid is freezing.

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3 years ago

Consider the following thermochemical equation:

Arisa [49]

Answer:

$m_w=5.3248\times 10^{23}\ kg$

Explanation:

According to the given reaction,

heat released by thecombustion of 2 molecules of Methanol, $\Delta H=1277000\ J$

we know that molecular mass of Methanol, $m=32\ g.mol^{-1}$

∴12 gram of methanol = $\frac{3}{8}\ moles$

we know 1 mole = $6.023\times 10^{23}\ molecules$

so,

$\rm \frac{3}{8} \ moles=2.258\times 10^{23}\ molecules$

Heat from the combustion of $2.258\times 10^{23}\ molecules$ :

$Q=1277000\times \frac{2.258\times 10^{23}}{2}$

$Q=1442132.0625\times 10^{23}\ J$

<u>Now the mass of water that can be heated from 23.5°C to 88.2°C :</u>

$Q=m_w.c_w.\Delta T$

$1442132.0625\times 10^{23}=m_w.4186\times (88.2-23.5)$

$m_w=5.3248\times 10^{23}\ kg$

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3 years ago

Se dispara una bala con una velocidad de v = 300[m/s] contra un cascarón esférico de papel que gira con MCU respecto a un eje ve

Sladkaya [172]

Answer:

w = 4.712 10⁻³ rad / s

Explanation:

For this exercise, the time it takes for the bullet to travel the distance of 2R must be equal to the time that the hole must travel half a circle.

Let's start by calculating the time it takes for the bullet, which is going at constant speed.

v = x / t

t = x / v

t = 2R / v

t = 2 0.10 / 300

t = 6.666 10⁻⁴ s

As they ask that a single hole is formed in this time, it must be rotated half a circle, that is, θ =π rad, for which we use the angular scientific relations, where the shell has constant angular velocity

w = θ / t

w = π / 6,666 10⁻⁴

w = 4.712 10⁻³ rad / s

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4 years ago

A satellite is put in a circular orbit about Earth with a radius equal to 35% of the radius of the Moon's orbit. What is its per

Debora [2.8K]

Answer:

0.21 lunar month

Explanation:

the radius of moon = r₁

time period of the moon = T₁ = 1 lunar month