1) what is the difference between a question and hypothesis

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Answer:

The acceleration due to gravity on the planet Fergie is 0.0123 m/s^2.

Explanation:

We want to find the acceleration due to gravity on the planet Fregie. Let it be g m/s^2.

Now, the acceleration due to gravity is defined through the following equation:

\(mg = GMm/R^2\)

where m is the mass of an object on the surface of the planet, M is the mass of the planet, R is the radius of the planet, and G is the universal Gravitational constant.

Subsituting values for M = 6.23*10^23, R = 5.79*10^7, G = 6.67*10^(-11), we get

g = 0.0123 m/s^2.

Thus the acceleration due to gravity on the planet Fergie is 0.0123 m/s^2.

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The most logical conclusion to make in light of the facts available is that the electric field is directed to the left. This conclusion may be drawn from the fact that a negative test charge, which is attracted to positive charges and repels other negative test charges, feels a force to the right.

The force applied to the negative test charge suggests the presence of positive charges in the electric field, indicating that the field lines begin with positive charges and end on negative charges since opposing charges attract.

The assumption that electric field lines originate from positive charges and end on negative charges is supported by this deduction. As a result, in this situation, the electric field is directed leftward.

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The tension force being supplied by the rope is 245 N.

The tension force on the given rope due to the weight of the lamp hanging from the rope is calculated by applying Newton's second law of motion as shown below;

T = mg

where;

T = 25 x 9.8

T = 245 N

Thus, the tension force being supplied by the rope is 245 N.

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Answer:

\(h_p = 30.46\ m\)

Explanation:

Free Fall Motion

A free-falling object refers to an object that is falling under the sole influence of gravity. If the object is dropped from a certain height h, it moves downwards until it reaches ground level.

The speed vf of the object when a time t has passed is given by:

\(v_f=g\cdot t\)

Where \(g = 9.8 m/s^2\)

Similarly, the distance y the object has traveled is calculated as follows:

\(\displaystyle y=\frac{g\cdot t^2}{2}\)

If we know the height h from which the object was dropped, we can solve the above equation for t:

\(\displaystyle t=\sqrt{\frac{2\cdot y}{g}}\)

The stadium is h=32 m high. A pair of glasses is dropped from the top and reaches the ground at a time:

\(\displaystyle t_1=\sqrt{\frac{2\cdot 32}{9.8}}=2.56\ sec\)

The pen is dropped 2 seconds after the glasses. When the glasses hit the ground, the pen has been falling for:

\(t_2=2.56 - 2 = 0.56\ sec\)

Therefore, it has traveled down a distance:

\(\displaystyle y=\frac{9.8\cdot 0.56^2}{2} = 1.54\ m\)

Thus, the height of the pen is:

\(h_p = 32 - 1.54\Rightarrow h_p=30.46\ m\)

The pen is 30.52 m above the ground.

Given that the height of the stadium is h = 32m

The initial velocity of the glasses will be 0.

\(h=\frac{1}{2}gt^{2} \\t=\sqrt{\frac{2h}{g} } \\t=\sqrt{\frac{2*32}{9.8} }\\t=2.55s\)is the time taken for the glasses to hit the ground.

Now the pen is released 2 seconds later. So by the time the glasses hit the ground the pen has spent:

\(t^{'}=2.55-2\\t^{'}=0.55s\)in the air

distance traveled by the pen:

\(d=\frac{1}{2}gt^{2}\\\\d=\frac{1}{2}*9.8*0.55*0.55\\\\d=1.48m\)

So the pen is  \(h-d=32-1.48=30.52m\)  above the ground.

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The electron gains more kinetic energy than the proton when accelerated through a potential difference of 1 V.

The relationship between the kinetic energies of the electron and proton can be determined using the formula for the kinetic energy of a particle:

\(KE = (1/2)mv^2\)

\(V = (q/m)d\)

where V is the potential difference, q is the charge, m is its mass, and d is the distance .

For the electron, \(V = 1 V\)and\(q/m = -1.6 x 10^-19 C/kg\), so its final velocity is:

\(v_e = sqrt((2qV)/m) = sqrt((2*(-1.6 x 10^-19)*1)/9.11 x 10^-31) = 5.93 x 10^6 m/s\)

For the proton, \(V = -1 V and q/m = 1.6 x 10^-19 C/kg,\) so its final velocity is:

\(v_p = sqrt((2qV)/m) = sqrt((2*(1.6 x 10^-19)*(-1))/1.67 x 10^-27) = 7.16 x 10^5 m/s\)

Substituting these values into the formula for kinetic energy, we get:

\(KE_e = (1/2)9.11 x 10^-31(5.93 x 10^6)^2 = 1.63 x 10^-17 J\)\(KE_p = (1/2)1.67 x 10^-27(7.16 x 10^5)^2 = 0.84 x 10^-17 J\)

Therefore, we have:

\(KE_e > KE_p\) , This is because the electron has a much smaller mass than the proton, so it experiences a much larger acceleration and gains more velocity and kinetic energy.

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Answer:

the distance between the stop signs is 120.7 m.

Explanation:

The car moved in three stages;

(1) It accelerates from rest at 2.0 m/s² for 6.2 seconds

(2) it moved at a constant speed for 2.5 s

(3) it finally decelerate at the rate of 1.5m/s²

(1) The distance moved by the car during the first stage;

s₁ = ut + ¹/₂at²

s₁ = 0 + ¹/₂ (2)(6.2)²

s₁ = 38.44 m

(2) The distance moved by the car during the second stage;

calculate the constant speed of the car,

v = u + at

v = 0 + 2 x 6.2

v = 12.4 m/s

The distance moved by the  car as it coasts for 2.5s: s₂ = vt

s₂ = 12.4 x 2.5

s₂ = 31 m

(3) The distance moved by the car during the third stage;

When the car stops, the final velocity is zero.

v² = u² + 2as₃

a = -1.5 m/s², since the car slowed down or decelerated.

0 = 12.4² + (2 x - 1.5)s₃

0 = 153.76 - 3s₃

3s₃ = 153.76

s₃ = 153.76 / 3

s₃ = 51.253 m

The total distance moved by the car from the start to stop = s₁ + s₂ + s₃

d = 38.44 m + 31 m + 51.253 m

d = 120.7 m

Therefore, the distance between the stop signs is 120.7 m.

8.27 x 1013 meres is the orbital radius.

Jupiter's mass, 1.9 x 1027 kg, and the time interval, 16.9 days, are equal to 1.46 x 106 seconds. The radius is needed, thus r. Solution

The moon must be held in its orbit by a gravitational force equal to the centripetal force between Jupiter and the moon.

6.67 x 10⁻¹¹ N/m²kg

2 x 1.9 x 10/27 x 1.46 x 10'6 / 4 r = 6.85 x 102'7 G = 6.67 x 10'11 N/m2kg2 r = 8.27 x 10'7

The second-largest moon in Jupiter's orbit and the third-largest moon in the solar system is called Callisto. Of all the objects in our solar system, its surface has the most craters.

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By using the right-hand rule for magnetic force to determine the charge on the moving particle, it's a negative charge.

It should be noted that the magnetic force simply means the attraction or repulsion that arises between electrically charged particles.

The right-hand rule for magnetic force states that to determine the direction of the magnetic force, one should point the right thumb in the direction of the velocity.

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Answer:

Particle q1 has a charge of 2.7 μC and a velocity of 773 m/s. If it experiences a magnetic force of 5.75 × 10–3 N, what is the strength of the magnetic field?

✔ 2.8

T

In the same magnetic field, particle q2 has a charge of 42.0 μC and a velocity of 1.21 × 103 m/s. What is the magnitude of the magnetic force exerted on particle 2?

✔ 0.12

N

Explanation:

Hope this helps

The characteristic that scientists use to place organisms in the Domain Eukarya is that they are composed of one or more eukaryotic cells. Therefore, the answer is B

To understand why eukaryotic cells are such an important characteristic of the Domain Eukarya, it's helpful to know a bit about the other two domains of life: Bacteria and Archaea.

Bacteria and Archaea are both composed of prokaryotic cells, which are cells that lack a nucleus and other membrane-bound organelles. In prokaryotic cells, the genetic material is typically found in a single circular chromosome that floats freely in the cytoplasm. Prokaryotes also lack other specialized structures like mitochondria and chloroplasts, which are found in eukaryotic cells.

This means that organisms in this domain have a true nucleus and other membrane-bound organelles within their cells. The four kingdoms within Eukarya are Animalia, Plantae, Fungi, and Protista, which are all composed of eukaryotic cells.

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Answer:

(C) because the elevator is not accelerating

Note  F = M a = M g (the resultant force on the elevator is due to gravity)

or  Fup = Fc   the force exerted on the elevator by the cable

and Fdown = Fe    the force exerted on the elevator by gravity

F = M a = Fup - Fdown = zero    resultant force on elevator

To calculate the liquid pressure at points A, B, and C in the given diagram, we need to consider the height and density of the liquid.

Let's assume that the liquid in the container is water, which has a density of approximately 1000 kg/m³.

Given:

- Height of column AB = 60 cm = 0.6 m

- Height of column BC = 30 cm = 0.3 m

To calculate the pressure at each point, we can use the formula:

Pressure = density * gravity * height

where:

- Density = 1000 kg/m³ (density of water)

- Gravity = 9.8 m/s² (acceleration due to gravity)

Calculating the pressures:

At point A:

Pressure_A = density * gravity * height_AB

         = 1000 kg/m³ * 9.8 m/s² * 0.6 m

         = 5880 Pascal (Pa)

At point B:

Pressure_B = density * gravity * (height_AB + height_BC)

         = 1000 kg/m³ * 9.8 m/s² * (0.6 m + 0.3 m)

         = 8820 Pascal (Pa)

At point C:

Pressure_C = density * gravity * height_BC

         = 1000 kg/m³ * 9.8 m/s² * 0.3 m

         = 2940 Pascal (Pa)

Therefore, the liquid pressures at points A, B, and C are as follows:

- Pressure at point A = 5880 Pa

- Pressure at point B = 8820 Pa

- Pressure at point C = 2940 Pa

Answer:

Static friction acts on stationary objects while kinetic friction acts on those in motion. Static friction is always greater or equal to kinetic friction. This can explain why objects often take more force to get in motion than it takes to continue their motion.

George burnt his fingertips so badly that he can't feel anything with them anymore, then the papillary layer part of his skin must have been damaged, therefore the correct answer is option A.

It can be defined as the form of the energy in which heat is transferred from one body to another body due to their molecular movements, thermal energy is also known as heat energy.

As given in the problem George burnt his fingertips so badly that he can't feel anything with them anymore.

Option A is the appropriate response since George must have injured the papillary layer of his skin if his fingertips were burned so badly that he can no longer feel anything with them.

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3.17 x 10^-8 Newtons is the required gravitational force between them.

The gravitational force between two objects is given by the formula:

F = G * (m1 * m2) / r^2

where F is the gravitational force, G is the gravitational constant (6.6743 x 10^-11 N*m^2/kg^2), m1 and m2 are the masses of the two objects, and r is the distance between the centers of mass of the two objects.

In this case, the masses of the man and the woman are:

m1 = 80 kg

m2 = 65 kg

The distance between them is:

r = 10 m

Plugging these values into the formula, we get:

F = 6.6743 x 10^-11 * (80 kg * 65 kg) / (10 m)^2

F = 3.17 x 10^-8 Newtons

Therefore, the attractive gravitational force between the man and the woman is approximately 3.17 x 10^-8 Newtons.

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A moral and social wellspring was the source of the moral quality of the vote that dried up the country.Protecting human life was a sincere desire.The lives of women and children gave this wish a tangible and compelling form.

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Answer:

• Gravitational potential energy is always negative while the elastic potential energy is always positive.

• Gravitational potential energy depends on the mass of the object, but elastic potential energy does not depend on the mass.

Answer:

a. 11.3 units

b. 46.031°

c. 11.3 units

d. 46.03°

Explanation:

a. magnitude

B = \(\sqrt{R^{2}-A^{2} }\)

= √15.7² - 10.9²

= √127.68

= 11.3 units

b. direction

θ = cos⁻¹(10.9units/15.7 units)

= 46.031⁰ north of west

c. thge magnitude at 15.7 units is the same as solution a above

15.7² = 10.9² + B²

B = 11.3 units.

d. the direction is same as  answer b.

θ = 46.031°

but the vector faces south of west

Answer:

Depends on position

Explanation:

Rest:

A body is said to be at rest, if it does not change its position with respect to its surroundings.

Motion:

A body is said to be in motion, if it changes its position with respect to its surroundings.

The state of rest and motion is relative

B. The wavelength of the wave

Answer:

they will fly

Explanation:

yes flying is fun

The acceleration, net force, and normal force by the car at the top of hill A are 4.5  meter/second² , 3180 N and 3180 N.

The acceleration, net force, and normal force by the car at the top of hill B are 4.17  meter/second² , 3379N and 3379 N.

The acceleration, net force, and normal force by the car at the top of hill C are 4.0  meter/second² , 3480 N and 3480 N.

Centripetal acceleration is a characteristic of an object's motion along a circular path. Centripetal acceleration applies to any item travelling in a circle with an acceleration vector pointing in the direction of the circle's center.

On hill A;

The centripetal acceleration = v²/r = 6²/8 meter/second² = 4.5  meter/second² .

The net force = m(g -a) = 600 (9.8 - 4.5) N = 3180 N.

The  normal force = 3180 N

On hill B;

The centripetal acceleration = v²/r = 5²/6 meter/second² = 4.17 meter/second² .

The net force = m(g -a) = 600 (9.8 - 4.17) N = 3379 N.

The  normal force = 3379 N.

On hill A;

The centripetal acceleration = v²/r = 4²/4 meter/second² = 4.0 meter/second² .

The net force = m(g -a) = 600 (9.8 - 4.0) N = 3480 N.

The  normal force = 3480 N.

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Answer:

I only know answer A and it's 2825.28 N/m, with rounding it's 2825.5

Explanation:

Use the m*g*h=1/2*k*x^2 equation

96*9.81*60=1/2*k*2^2

5650.56=2k

5650.56/2=2825.28N/m

Wavelength of the given wave is 8 cm and frequency is  37.5 *\(10^{8}\) Hz.

The number of vibrations counted per second is called frequency. A wave is a group of vibrations that are referred to as energy. The bottom node is known as the crest, and the top node is known as the trough.

The frequency of an alternating current is the number of full cycles per second. The hertz, also known as Hz, is the accepted unit of frequency. The frequency of a current is 1 Hz if one cycle is completed per second; 60 cycles per second equals 60 Hz.

There are 8 waves so assume one wave is 1 cm so wavelength is 8 cm and frequency of wave = speed of light/ wavelength

frequency = \(3*10 ^{8} / .08\)

Frequency = 37.5 *\(10^{8}\) Hz

Wavelength of the given wave is 8 cm and frequency is  37.5 *\(10^{8}\) Hz.

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The kilogram is an SI base unit that makes up part of the unit of energy, therefore the correct answer is option D

A unit of measurement is a specified magnitude of a quantity that is established and used as a standard for measuring other quantities of the same kind. It is determined by convention or regulation.

The base SI units are meter, kilogram, second, kelvin, ampere, candela, and mole

The unit of energy is Joules which is equivalent in mks unit as Kg m²s⁻²

Thus, The kilogram is an SI base unit that makes up part of the unit of energy, therefore the correct answer is option D

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Answer:

only in the column for metalloids

Explanation:

Did it on edge!

Franklin should place this property only in the column for metalloids, therefore the correct answer is option A.

The elements of the periodic tables that behave as metal, as well as the nonmetal in some chemical or physical aspects, are known as metalloids. Some examples of metalloids are Boron, silicon, germanium, arsenic, antimony, tellurium, etc.

Generally, metalloids have an intermediate position in the periodic table which is in between metals and nonmetals.

As given in the problem The table shows columns that Franklin uses to organize his notes on the properties of elements. His notes state that some elements are widely used in semiconductors, A 3-column table with 2 rows. The first row has entries as metals, metalloids, and nonmetals. The second row has entries nothing, nothing, nothing.

As metalloids are widely used as semiconductors across several electronic and electrical applications.

Thus, Franklin should only list this characteristic under metalloids, therefore the correct answer is option A.

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An independent-measures t hypothesis test is appropriate when - d.  there are two separate samples containing different subjects.

When you wish to compare the means of just two groups—no more, no less—use an independent samples t test! This test is typically used to detect whether two population means differ. This process employs samples to infer information about populations, making it an inferential statistical hypothesis test. The two sample t test is another name for the independent samples t test. You can reject the null hypothesis if the p-value is less than your threshold for significance (for example, 0.05). The two means difference is statistically significant. The data from your sample is convincing enough to support the conclusion that the two-population means are not equal.

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Answer:

1.23

Explanation:

\({\underline{\pink{\textsf{\textbf{ Answer : }}}}}\)

➩ 1.23 feet

\({\underline{\purple{\textsf{\textbf{Explanation : }}}}}\)

Given :

To find :

Solution :

As it is told that it's divided into four equal pieces

Therefore,

We must divide it by 4 to get the length of each piece.

So,

\( \sf \to \: \frac{4.92}{4} \\ \sf \to \: 1.23 \: feet \: ans.\)

Answer:

   V_{2G} = - 10 m / s

Explanation:

This is an exercise on relative velocities in one dimension, let's use the subscript 1 for the girl, the 2 for the but, the index 3 for the conveyor belt and the index G for the Earth

we will consider the velocity is positive to the right.

They indicate the speed of the belt with respect to the ground = 2 m/s

   the dog speed with respect to the belt = - 8 m / s

Dog speed is requested with respect to the Earth

            \(V_{2G} = V_{23} - V_{3G}\)

notice that the inner subscripts cancel out.

We calculate

            = -8 - 2

            V_{2G} = - 10 m / s

the negative sign indicates that the dog moves to the left

Answer:

Here are the steps to perform the experiment:

1. Set up a pendulum by suspending a weight from a fixed point using a string or a rod. Ensure that the length of the string or the rod is constant.

2. Displace the weight by a small angle and release it to allow it to oscillate back and forth.

3. Use a stopwatch or a timer to measure the time it takes for the pendulum to complete one full oscillation (i.e., from one extreme position to the other and back to the original position).

4. Repeat the measurement several times to get an average value for the time period.

5. Compare the measured time period to the calculated value using the formula T = 2π√(L/g), where T is the period, L is the length of the pendulum, and g is the acceleration due to gravity.

If the measured value is close to the calculated value, then the calculated period can be considered accurate. However, if the measured value is significantly different from the calculated value, then the calculated period may need to be revised or further experiments may need to be performed to determine the source of the error.

It is important to note that experimental errors such as human error in measuring the time or the length of the pendulum can affect the accuracy of the measurement. Therefore, it is recommended to repeat the experiment several times to minimize these errors and obtain a more accurate value.

The displacement of the train after 2.23 seconds is 25.4 m.

The resultant velocity of the train is calculated as follows;

R² = vi² + vf² - 2vivf cos(θ)

where;

R² = 8.81² + 9.66² - 2(8.81 x 9.66) cos(76)

R² = 129.75

R = √129.75

R = 11.39 m/s

The displacement of the train is the change in position of the train after a given period of time.

The displacement is calculated as follows;

Δx = vt

Δx = 11.39 m/s x 2.23 s

Δx = 25.4 m

Thus, the displacement of the train after 2.23 seconds is 25.4 m.

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