A student measured the density of Galena to be 7.9g/cm3 however the known density of Galena is 7.6g/cm3 . Calculate the percent error of the measurements.

The unit conversion of 1.5 x 10⁸ Gm to m =  1.5 x 10¹⁷ m.

The unit conversion of 2.6 x 10⁻⁵ nm =  2.6 x 10⁻²⁰ Mm.

The unit conversion of 2.72 x 10⁻⁵ μm =   2.72 x 10⁻¹¹ m.

The unit conversion of 2.56 x 10⁻³ cm =  2.56 x 10⁻⁸ km.

The unit conversion of 2 hr =  7,200 seconds.

The unit conversion of 2 h 30 min  = 9,000 seconds.

Unit conversion involves the change of unit of a substance from one base to another.

1.5 x 10⁸ Gm = 1.5 x 10⁸ x 10⁹ m = 1.5 x 10¹⁷ m

2.6 x 10⁻⁵ nm = 2.6 x 10⁻⁵ x 10⁻⁹ x 10⁻⁶ m = 2.6 x 10⁻²⁰ Mm

2.72 x 10⁻⁵ μm =  2.72 x 10⁻⁵  x 10⁻⁶ m =  2.72 x 10⁻¹¹ m

2.56 x 10⁻³ cm = 2.56 x 10⁻³ x 10⁻² m x 10⁻³ km/m = 2.56 x 10⁻⁸ km

2 hr = 2 x 3600 s = 7,200 seconds

2 h 30 min = 7,200 seconds + 1800 s = 9,000 seconds

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The statements that are true are

A satellite is a moon, planet of machine that orbits a planet or a star.

From the diagram, we see that X is a planet, Y is a planet and also a moon to X and z is amoon to Y and Z

Since X does not orbit Y but Y orbits X.

So, the statement is false.

Since Y does not orbit Z but Z orbits Y.

So, the statement is false.

Since X does not orbit Y but Y orbits X, and Z orbits Y.

Since only Z orbits Y, then the statement is false.

Since Z orbits Y and Y orbits X and invariably, Z also orbits X. So, Y and Z orbit X.

So, the statement is true

Since Y orbits X but Z orbits Y, Y is a satellite for X but not Z, since Z orbits Y and is a satellite for Y.

Since Y is only a satellite for X and not Z,

So, the statement is false.

Since Y orbits X, so Y is a satellite for X.

So, the statement is true.

Since Z orbits Y, so Z is a satellite for Y.

So, the statement is true

So, the statements that are true are

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Answer:

Density=10.50kg/m³

Explanation:

\(Solution,\\Height(h)=0.5m\\Radius(r)=0.4m\\Now, \\Volume=\pi r^{2} h\\\\Volume=\pi *(0.4m)^{2} *0.5m\\\\Volume=0.251327m^{3} \\\\Again,\\\\Density=\frac{mass}{volume} \\\\Density=\frac{2.640kg}{0.251327} \\\\Density=10.50kg/m^{3}\)

The density of the cylindrical rod is 10.516 kg/m³.

To calculate the density of the cylindrical rod, we can use the formula:

\(\rm \[\text{{Density}} = \frac{{\text{{Mass}}}}{{\text{{Volume}}}}\]\)

The mass of the rod is given as 2.640 kg. To find the volume, we can use the formula for the volume of a cylinder:

\(\rm \[\text{{Volume}} = \pi \times \text{{radius}}^2 \times \text{{height}}\]\)

Substituting the given values:

\(\[\text{{Volume}} = \pi \times (0.4 \, \text{{m}})^2 \times 0.5 \, \text{{m}}\]\)

Calculating the volume:

\(\[\text{{Volume}} = \pi \times 0.16 \, \text{{m}}^2 \times 0.5 \, \text{{m}}\]\\\\text{{Volume}} = 0.251 \, \text{{m}}^3\]\)

Now we can substitute the mass and volume values into the density formula:

\(\[\text{{Density}} = \frac{{2.640 \, \text{{kg}}}}{{0.251 \, \text{{m}}^3}}\]\)

Calculating the density:

\(\[\text{{Density}} = 10.516 \, \text{{kg/m}}^3\]\)

Therefore, the density of the cylindrical rod is 10.516 kg/m³.

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All the equations of motion are as follows, Displacement (s) equation, Final velocity (v) equation, Average velocity (v_avg) equation, Displacement (s) equation with average velocity, and Displacement (s) equation.

In terms of its motion as a function of time, equations of motion define how a physical system behaves. In more detail, the equations of motion define how a physical system behaves as a collection of mathematical functions expressed in terms of dynamic variables.

In conclusion, equations of motion define how a physical system behaves in terms of how its motion changes over time.

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Answer:

A 50 kg boulder suspended from a cliff.

Explanation:

In this case, that totally depends on the velocity of the object, In case of car, that's just parked so the velocity is zero and a fish can't swim with higher velocity than a boulder which is suspended from a cliff.

Hope it helps!<3

Answer:

19.6m/s

Explanation:

Given parameters:

Initial velocity  = 0m/s

Time  = 2s

Unknown:

Average velocity  = ?

Solution:

We can use the final velocity of the ball before landing to determines its average velocity ;

 Using;

              v  = u + gt

v is the final velocity

u is the initial velocity

g is the acceleration due to gravity

t is the time

              v  = 0 + 9.8 x 2 = 19.6m/s

Explanation:

i dont to i want to copy and paste on my printer

Matching the units with their measurements gives :

Kilometers are a common unit of measurement for distance in the metric system, and are used to measure long distances, such as the distance between cities or countries.

Kilometers per hour is a common unit of measurement for speed, velocity, and some forms of acceleration, and is used to describe the rate of movement of an object over a specified distance in a given amount of time.

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Answer:

Electron shell

Nucleus

Neutrons

Explanation:

An atom is made up of three fundamental subatomic particles which are the protons, neutrons and electrons.

Answer:

thermal energy

Explanation:

This is the definition of the thermal energy of a substance.  It's the sum of the KE and PE of all its particles.

Star has a spectrum that includes red, blue, and violet lines spaced in the pattern of the lines from hydrogen but the violet lines are at 424nm and 400nm instead of the usual 434nm and 410nm. from this  star is Moving towards us.

Information about a star's temperature, chemical make-up, and inherent luminosity can be found in its spectrum. A series of photographs taken at various wavelengths of the slit in the star's light make up spectrograms produced by slit spectrographs. Astronomers can identify an element by its spectral lines, as well as its temperature and density within the star. The magnetic field of the star can also be shown via the spectral line. How quickly the material is travelling can be determined by the line's width. This teaches us something about the winds in stars. The object is also referred to as the "Seven Sisters" and Messier 45, and its English name comes from a Greek tale. The Pleiades are seven of Atlas, the Titan deity, and the Pleiades' daughters.

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Answer:

C. That the small portion of the space we can see is truly representative of all the rest of the universe that we cannot see.

Explanation:

The Cosmological Principle assumes that the small portion of the universe that we can see is representative of the entire universe, even though we can only directly observe a tiny fraction of it. It's an assumption used by Cosmologists to simplify their models of the universe.

Answer:

When an external force acts upon them

Answe ¡Buenos días! –

#3 ¡Buenas tardes! –

#4 ¡Bienvenid

Answer:

2,000 watts

Explanation:

Work done = Force * distance = 1,000 * 2 = 2,000 J

Power = work/time = 2,000/1 = 2,000 watts

Answer:

2000 watts

The explanation is in the picture

Answer:

It is the carrier of genetic information.

1. The time taken for the object to reach the ground is 2.47 s

2. The speed with which the object will reach the ground is 26.206 m/s

1. How do I determine the time taken?

We can obtain the time taken for the object to reach the ground as      follow:

h = ½gt²

30 = ½ × 9.8 × t²

30 = 4.9 × t²

Divide both side by 4.905

t² = 30 / 4.9

Take the square root of both side

t = √(30 / 4.9)

t = 2.47 s

Thus, the time taken to reach the ground is 2.47 s

2. How do i determine the speed?

The speed the object will use to reach the ground can be obtained as follow:

v = u + gt

v = 2 + (9.8 × 2.47)

v = 2 + 24.206

v = 26.206 m/s

Thus, the speed is 26.206 m/s

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24.494 m/s is the speed when its height was half that of its starting point.

Given, Initial velocity of the roller coaster, u=0 m/s

Final velocity of the roller coaster, v=30 m/s

Change in height of the roller coaster,

h = 0-1 = −1 m

Acceleration due to gravity, g=9.8 m/s2

To find: What was its speed when its height was half that of its starting point?

Let the height of the roller coaster when its speed is half be h1.

We know that, the potential energy (PE) of the roller coaster at a height h above the ground is given by

PE=mgh

where m is the mass of the roller coaster, g is the acceleration due to gravity and h is the height of the roller coaster above the ground.

At height h above the ground, the PE of the roller coaster is given by

PE=mgh1/2

where m is the mass of the roller coaster and g is the acceleration due to gravity.

The kinetic energy (KE) of the roller coaster when its speed is v is given by

KE=12m\(v^2\)

where m is the mass of the roller coaster and v is its speed.

When the roller coaster is at a height h above the ground, its total mechanical energy (E) is given by

E = KE+PE = 12m\(v^2\)+mgh

At height \(h_1\) above the ground, the total mechanical energy (E) of the roller coaster is given by

E=12m\(v^2\)+mgh 1/2

We know that the total mechanical energy of the roller coaster remains constant throughout its motion.

Hence, the above equation can be written as

12m\(v^2\)+mgh=12m\(v^2\)+mgh1/2

⇒\(v_1\)=\(\sqrt{v_2}\)+h/2 g

\(v_1\) =√303/2×9.8 = 24.494 m/s

Therefore, the speed of the roller coaster when its height was half that of its starting point is 24.494 m/s.

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Our intrepid hero has done 2332 kJ of work pushing the crate on the frictionless surface of the newly discovered planet.

The work done by the space traveler can be determined utilizing the recipe W = F x d, where W is work, F is power, and d is distance. To find the power, we can utilize the recipe F = m x a, where m is mass and an is speed increase. Connecting the given qualities, we get F = 220 kg x 2 m/s^2 = 440 N.

Presently we can compute the work done by increasing the power by the distance: W = 440 N x 5.3 km = 2332 kJ. Accordingly, our fearless legend has done 2332 kJ of work pushing the container on the frictionless surface of the newfound planet.

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Answer:

1)copper wire

Explanation:

it is the best electric conductor

Pythagorean theorem is the process use to find the magnitude of the resultant of two perpendicular vectors.

The Pythagorean Theorem is used to calculate the steepness of slopes of hills or mountains. A surveyor appears via a telescope in the direction of a measuring stick a fixed distance away, so that the telescope's line of sight and the measuring stick form a right angle.

It allows to explain the space round us and is important no longer only in construction however suitably tailored in equations of thermodynamics and preferred relativity.

The Pythagorean Theorem is useful for two-dimensional navigation. you may use it and two lengths to discover the shortest distance. The distances north and west will be the two legs of the triangle, and the shortest line connecting them might be the diagonal. The same ideas may be used for air navigation.

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The correct answers are: 1) a. The collision is not elastic, and this can be determined without knowing the masses of the boxes. 2) b. M = 4m



1) In an elastic collision, both momentum and kinetic energy are conserved. In this case, we can see that the initial kinetic energy of the system is (1/2)mv₀² (since the box with mass M is initially at rest). After the collision, the kinetic energy of the system is (1/2)m(v₀/2)² + (1/2)M(v₀/2)². Comparing the two, we can see that the initial kinetic energy is greater than the final kinetic energy. Therefore, the collision is not elastic, and we don't need to know the masses of the boxes to determine this. The correct answer is a).

2) To find the relationship between the masses, we only need to consider momentum conservation. Initially, the total momentum is mv₀ (since the box with mass M is at rest). After the collision, the total momentum is m(v₀/2) - M(v₀/2) (since one box moves to the left and the other to the right). Setting the initial momentum equal to the final momentum:

mv₀ = m(v₀/2) - M(v₀/2)

Divide both sides by v₀/2 to isolate the masses:

2m = m - M

Now, solve for M:

M = m - 2m
M = -m

However, the masses should be positive, so we must consider the magnitudes of the velocities:

2m = m + M
M = 4m

So, the mass of the larger box M is four times the mass of the smaller box m. The correct answer is b).

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Answer:

1237 J

Explanation:

The work done by the hose on the balloon is the work done by a spring which is

W = 1/2k(x₀² - x₁²) where k = spring constant = 112 N/m, x₀ = 4.70 m and x₁ = 0 m.

Substituting the values of the variables into the equation, we have

W = 1/2k(x₀² - x₁²)

W = 1/2 × 112 N/m((4.70 m)² - (0 m)²)

W = 56 N/m(22.09 m² - 0 m²)

W = 56 N/m(22.09 m²)

W = 1237.04 J

W ≅ 1237 J

Answer:

Explanation:

W=Fd

Percent error is the difference between the experimental value and theoretical value and measures the accuracy of the result found. The larger the error, lesser is the accuracy and vice versa.

Solution:

It is a mathematical way of showing accuracy

The higher the percent error, the less accurate the data set,

Plate tectonics does not exist on the Moon. On the Moon, biological deterioration is impossible. The Moon does not have any water to support weathering.

life, or living processes, or having to do with either. utilized or generated by applied biology. 3. related through a direct genetic link rather than an adoption or marriage.

concerning biology or the biological world. a material created from a living being or one of its byproducts is referred to as in medicine. Biologicals can be utilized for illness prevention, diagnosis, treatment, or symptom relief. Examples of biologicals include interleukins, antibodies, and vaccinations.

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Answer:

(1) is incorrect and (2) is correct.

Explanation:

There is a force of friction opposing the motion, but as soon as Jill let go of the ball, there is no force pushing the ball onward. Therefore, the only forces acting on the ball is the force of friction and air resistance. (still friction)

Answer:

5 912 500 000 000 = 5.91x10^12 miles

Explanation:

The first thing we need to do is convert the light year distance to kilometres, since we have the kilometre to mile conversion. There are 1000m in a kilometre, so we need to divide the light year value that we have by 1000, giving us 9.46x10^12 km for 1 light year.

Now that we have our value in kilometres, we simply need to divide it by 1.6 to get it in miles. Doing so gives us 5 912 500 000 000 miles, or 5.91x10^12 miles.

Hope that made sense, and let me know if you have any further questions!