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3 years ago

Why is it important to conduct repeated trails during an investigation

Physics

2 answers:

Brilliant_brown [7]3 years ago

6 0

Because the more trials you conduct the more chances that your data is true

il63 [147K]3 years ago

4 0

What he said was right

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If the momentum of a 1000 kg car travelling at 10 m/s was transferred completely to a 20.0 kg traffic barrier, what would the fi

Alenkinab [10]

Answer:

500 m/s

Explanation:

Momentum, p is a product of mass and velocity. From law of conservation of momentum, the initial momentum equals final momentum

$m_1v_1=m_2v_2\\1000*10=20v_2\\v_2=10000/20=500 m/s$

Here m and v represent mass and velocity respectively and subscripts 1 and 2 represent car and barrier respectively

Therefore, the velocity of barrier will be 500 m/s

6 0

3 years ago

How many amps are in 1 horsepower?

Kisachek [45]

745.699872 watts. There is no direct conversion to determine the amount of amps in 1 horsepower

8 0

3 years ago

Katena32 [7]

The net force needed to accelerate a 200 kg piano is 50N

According to Newton's law of motion, the formula for the net force is calculated as:

∑F = ma

Given the following parameters

Mass = 200kg

acceleration = 0.25m/s²

Substitute the given parameters into the formula

∑F = 200 * 0.25

∑F = 50N

Hence the net force needed to accelerate a 200 kg piano is 50N

Learn more here: brainly.com/question/19030143

7 0

3 years ago

Ideal gases are often studied at standard ambient temperature and pressure (satp). The international union of pure and applied c

11Alexandr11 [23.1K]

This problem provides information about the pressure and temperature ideal gases are studied at. The answer to the questions are that all molecules have the same density, 2.43x10²⁵ mol/m³ and 2.43x10¹⁹ mol/cm³.

<h3>Idela gases</h3>

In science, we can start studying gases with the concept of ideal gas, as they do not collide one to another and are assumed to be perfect spheres with no relevant interactions.

In such a way, one can conclude that the <u>number density of all ideal gasses at SATP is the same</u>, as they are assumed to be perfect spheres with equal volumes per molecule.

Moreover, when calculating the number of molecules per cubic meter, one must use the ideal gas equation as:

$PV=nRT\\\\\frac{N}{V}= \frac{P*N_A}{RT}$

And plug in the numbers we are given:

$\frac{N}{V}= \frac{100kPa*\frac{1000Pa}{1kPa}*6.022x10^{23}molec/mol}{8.314\frac{Pa*m^3}{mol*K}*298K}=2.43x10^{25}molec/m^3$

Lastly, we can calculate the molecules per cubic centimeter by performing the following conversion:

$2.43x10^{25}\frac{molec}{m^3}*(\frac{1m}{100cm} )^3\\ \\=2.43x10^{19}\frac{molec}{cm^3}$

Learn more about ideal gases: brainly.com/question/26450101

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3 years ago

A 600 N astronaut travels to an asteroid where the gravitational force is one-hundredth that of Earth. What is the astronaut's w

timurjin [86]

Weight=mass x gravitational force

W=60 x 1/100 x 10
W=60 x 0.1
W=6N

7 0

3 years ago