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3 years ago

An object sliding along a horizontal table is an example of projectile motion.

Chemistry

2 answers:

andrew-mc [135]3 years ago

6 0

Answer:

False

Explanation:

"Projectile motion is a form of motion experienced by an object or particle that is thrown near the Earth's surface and moves along a curved path under the action of gravity only. This curved path was shown by Galileo to be a parabola." -Wikipedia

The object does not take a parabolic trajectory through the air.

Mumz [18]3 years ago

5 0

True because if anything is moving it is in motion. And because horizontal is similar to projectile!

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Vera_Pavlovna [14]

Answer: Should be A)

Explanation:

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2 years ago

A 275 g sample of a metal requires 10.75 kJ to change its temperature from 21.2 oC to its melting temperature, 327.5 oC. What is

Vlada [557]

Answer:

$c=0.127\ J/g^{\circ} C$

Explanation:

Given that,

Mass of the sample, m = 275 g

It required 10.75 kJ of heat to change its temperature from 21.2 °C to its melting temperature, 327.5 °C.

We need to find the specific heat of the metal. The heat required by a metal sample is given by :

$Q=mc\Delta T$

c is specific heat of the metal

$c=\dfrac{Q}{m\Delta T}\\\\c=\dfrac{10.75\times 10^3\ J}{275\times (327.5 -21.2)}\\\\=0.127\ J/g^{\circ} C$

So, the specific heat of metal is $0.127\ J/g^{\circ} C$ .

4 0

2 years ago

6.) Choose all of the following that are TRUE regarding the Ideal Gas Law.

Cerrena [4.2K]

Answer:

All temperatures must be in Kelvins.

Explanation:

What you have to know;

When Pressure is in atm units

Temperature must be in Kelvins.
Volume must be in cubic centimetres.
R = 0.0813

When Pressure is in Pascals or N/m^2

Temperature must be in Kelvins.
Volume must be in cubic metres.
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4 0

3 years ago

What is the frequency of a red light with a wavelength of 6.98 x 10^-6

nevsk [136]

Answer:

frequency of light = $4.2\times 10^{-13}$

Explanation:

we know that relation between frequency and wavelength of light is

frequency × wavelength = speed of light.

therefore frequency = $\frac{c}{wavelength}$

= $\frac{3\times 10^{8}}{6.98\times 10^{-6}}$

= $4.2\times 10^{-13}$

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3 years ago

Convert 5.0x10^24 molecules to liters.

Over [174]

To convert the given value we need conversion factors to relate molecules to liters. At STP, we know that 1 mol is equal to 22.4 L and by using Avogadro's number we can relate molecules to 1 mol. Calculation is as follows:

5.0x10^24 molecules ( 1 mol / 6.022 x 10^23 molecules ) ( 22.4 L / 1 mol) = 186.0 L

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3 years ago