Which word best describes a good scientific question? narrow-focused unanswerable broad testable

\(\\ \sf\Rrightarrow K.E=\dfrac{1}{2}mv^2\)

\(\\ \sf\Rrightarrow 3.5=\dfrac{1}{2}m(17)^2\)

\(\\ \sf\Rrightarrow 7=289m\)

\(\\ \sf\Rrightarrow m=\dfrac{7}{289}\)

\(\\ \sf\Rrightarrow m=0.024kg\)

Answer:

the answer to this question is A globular cluster

The objective lenses of the compound light microscope are attached to the rotating nosepiece.

The rotating nosepiece is the part of a compound light microscope that holds the objective lenses. It is typically located near the lower end of the body tube. The objective lenses are attached to the nosepiece and can be rotated to select the desired magnification level.

The body tube of the microscope connects the eyepiece to the objective lenses and provides the pathway for the light to pass through. The stage is the platform where the specimen or slide is placed for observation.

While the base of the microscope provides stability and support, it does not directly involve the attachment of the objective lenses. Therefore, in the given options, the correct answer is that the objective lenses are attached to the rotating nosepiece.

To learn more about lenses here:

https://brainly.com/question/30469516

#SPJ11

The Federal Reserve helps to regulate the economy of the United States. So, the correct option is D.

Marketing is defined as the activities done for promoting the products through creating offers and communicating to the customers.

Here,

The Federal Reserve of the United state is functioning as a Central Bank, such that they are maintaining the financial aspects of the system.

The Federal Reserve has a great role in regulating the financial system and at the same time, the establishing of the monetary policies.

The primary functions of the Federal Reserve includes the functions of maintaining the banking operations and reliable payments for the system.

Hence,

The Federal Reserve helps to regulate the economy of the United States.

To learn more about marketing, click:

https://brainly.com/question/13414268

#SPJ7

The wavelength of the radio waves emitted by the radio galaxies which have twin radio jets that emanate from a central core is determined as 15 m.

The wavelength of the radio waves is the distance traveled by the radio waves. The magnitude of the wavelength is determined from the ratio of speed of radio waves to the frequency of the radio waves.

v = fλ

where;

Radio wave is an example of electromagnetic radiation, and it travels at the same speed as light (3 x 10⁸ m/s).

λ = v/f

λ = (3 x 10⁸ ) / (20 x 10⁶)

λ = 15 m

Thus, the wavelength of the radio waves emitted by the galaxy is 15 m.

Learn more about wavelength here: https://brainly.com/question/10728818

Answer:

The value is  \(a = 20.4 \%\)  

Explanation:

From the question we are told that

    The  acceleration due to gravity of the planet is  \(a = 5.40 \ m/s^ 2\)

     The  percentage  volume of the apparatus submerged in the ocean on earth is \(k = 25.0 \%\)

  Generally the buoyant force acting on the apparatus  is equal to the weight of the apparatus

i.e

     \(\rho_s * V_s * g = m * g\)

Hence the mass of the apparatus  is mathematically represented as

           \(m_s = \rho_s * V_s\)

Here  \(\rho_s\) is the  density of the sea water with a value of  \(\rho_s = 1030 \ kg/m^3\)

        \(V_s\) is the volume of the apparatus submerged

So  

          \(m_s = 1030 * 0.25 V\)  

Here V  is the total  volume of the apparatus

=>        \(m_s = 257.5 V \ kg\)  

  Generally at the new planet the mass of the apparatus is mathematically represented as

      \(m_c = \rho_c * V_c\)

Here  \(\rho_c\) is the  density of the glycerin with a value of  \(\rho_c = 1260 \ kg/m^3\)

Gnerally  \(m_s = m_c\)  

So

         \(257.5 V = 1260 * V_c\)

=>      \(V_c = \frac{257.5V }{ 1260 }\)  

=>      \(V_c = 0.204 \ V\)

Hence the percentage volume of the apparatus which is submerged in glycerin at the new planet is  

           \(a = 0.204 * 100 = 20.4 \%\)  

Answer:

V = (S2 - S1) / t

V = 8 m / 1 s = 8 meters /second

4.76 kg \(m^{2} / sec\) will be  the angular momentum of a 0.310 kg ball rotating on the end of a thin string in a circle of radius 1.45 m at an angular speed of 10.6 rad/s

L = m*v*r

m = mass

v = velocity

r = radius  

L (angular momentum ) = m*v*r

                                      =  0.310 * 1.45 * 10.6  

                                      = 4.76 kg \(m^{2} / sec\)

To learn more about angular momentum here :

https://brainly.com/question/15104254

#SPJ4

Answer:

Socialist

Explanation:

Answer: socialist

Explanation: A socialist form of government is where the goods and services are equally shared, and the political power is distributed among the people.

Answer:Both maximum height attained and angle of projection

Explanation:

The kernel (null space) of a linear map L from a vector space V to a vector space W is a subspace of V.

To prove that the kernel (null space) of a linear map L from a vector space V to a vector space W is a subspace of V, we need to show three things: closure under vector addition, closure under scalar multiplication, and the presence of the zero vector.

1. Closure under vector addition:

Let u and v be vectors in the kernel of L, denoted as u, v ∈ ker(L). This means L(u) = 0 (the zero vector in W) and L(v) = 0. We want to show that u + v is also in the kernel of L.

Using the linearity of L, we have:

L(u + v) = L(u) + L(v) = 0 + 0 = 0

This shows that u + v is mapped to the zero vector by L, thus u + v is in the kernel of L.

2. Closure under scalar multiplication:

Let u be a vector in the kernel of L, denoted as u ∈ ker(L). This means L(u) = 0. We want to show that αu is also in the kernel of L for any scalar α.

Using the linearity of L, we have:

L(αu) = αL(u) = α0 = 0

This shows that αu is mapped to the zero vector by L, thus αu is in the kernel of L.

3. Presence of the zero vector:

The zero vector in V, denoted as 0v, is always in the kernel of any linear map because L(0v) = 0 in the codomain W.

Therefore, we have shown that the kernel of L satisfies the three conditions to be a subspace of V: closure under vector addition, closure under scalar multiplication, and the presence of the zero vector. Hence, the kernel of L is indeed a subspace of V.

To learn more about vector space, Visit:

https://brainly.com/question/11383

#SPJ11

Interference caused by the saturation of electromagnetic waves in the atmosphere is a significant problem for wireless communications.

The significant problem for wireless communications due to the saturation of electromagnetic waves in the atmosphere is called interference.

Interference occurs when the electromagnetic waves from different sources overlap or collide, causing disturbances in the wireless signals. This can lead to a decrease in signal quality, disrupted communications, and reduced data transmission speeds.

To mitigate interference in wireless communications, several techniques are employed. One such technique is the use of frequency bands. Different wireless devices and systems operate within specific frequency ranges to minimize interference.

Additionally, technologies like spread spectrum and frequency hopping help to spread the signal across a wider range of frequencies, making it more resilient to interference.

Another approach to tackling interference is through signal processing techniques. Advanced algorithms are used to filter out unwanted signals or noise, allowing for better signal reception and transmission. These algorithms can distinguish between desired signals and interference, enhancing the overall performance of wireless communications.

Moreover, antenna design and placement also play a crucial role in reducing interference. Antennas are designed to have specific radiation patterns, directing the signal in a particular direction and minimizing the chances of interference from other sources.

In conclusion, interference caused by the saturation of electromagnetic waves in the atmosphere is a significant problem for wireless communications. However, through the implementation of techniques such as frequency bands, spread spectrum, signal processing, and proper antenna design, the impact of interference can be minimized, leading to improved wireless communication capabilities.

Learn more about electromagnetic waves at: https://brainly.com/question/13803241

#SPJ11

The density of CO at 1140 torr and 75.0 °C is 1.00 g/L.

To find the density of CO, we can use the ideal gas law equation: PV = nRT, where P is the pressure in atm, V is the volume in L, n is the number of moles, R is the gas constant (0.08206 L·atm/K·mol), and T is the temperature in Kelvin.

We can rearrange this equation to solve for density (d = m/V), where m is the mass in g.

First, we need to convert the pressure from torr to atm and the temperature from °C to K:

1140 torr = 1.50 atm (using conversion factor 1 atm = 760 torr)
75.0 °C = 348.2 K (using conversion formula K = °C + 273.15)

Next, we can assume that we have 1 mole of CO, since we are not given a specific amount. We can solve for the volume using the ideal gas law:

PV = nRT
(1.50 atm) V = (1 mol) (0.08206 L·atm/K·mol) (348.2 K)
V = 0.037 L

Finally, we can calculate the density:

d = m/V
m = n(MW) = (1 mol)(28.01 g/mol) = 28.01 g
d = 28.01 g / 0.037 L = 1.00 g/L

To know more about density, visit here :

brainly.com/question/29775886

#SPJ11

The optimal values of \(q_1\) and \(q_2\) are determined by these equations, which are functions of Michael's income and the prices of the goods.

The given problem describes Michael's utility maximization problem with a constant elasticity of substitution (CES) utility function. The objective is to find the optimal values of \(q_1\) and \(q_2\) in terms of Michael's income (Y) and the prices of the two goods (\(p_1\) and \(p_2\)).

1. Substitute the income constraint into Michael's utility function:

\(U(q_1, q_2) = (q_1^\rho + q_2^\rho)^(1/\rho)\)

  s.t. \(Y = p_1q_1 + p_2q_2\)

  We can rewrite Michael's budget constraint as \(q_2 = (Y - p_1q_1)/p_2\). Substituting this expression into his utility function, we have:

 \(U(q_1, p_2, Y) = (q_1^\rho + [p_2(Y - p_1q_1)/p_2]^\rho)^{(1/\rho)\)

  By making this substitution, we have converted the constrained maximization problem with two control variables (\(q_1\) and \(q_2\)) into an unconstrained problem with one control variable \((q_1)\).

2. Use the standard unconstrained maximization approach to determine the optimal value for \(q_1\). To obtain the first-order condition, we differentiate the utility function with respect to \(q_1\) and set it equal to zero:

\(\delta U / \delta q_1 = \rho(q_1^{(\rho-1)} + \rho[p_2(Y - p_1q_1)/p_2]^{(\rho-1)}(-p_1/p_2)) = 0\)

Simplifying and solving for \(q_1\):

\(\rho q_1^{(\rho-1)} - \rho(p_1/p_2)[p_2(Y - p_1q_1)/p_2]^{(\rho-1)} = 0\)

\(\rho q_1^{(\rho-1)} - \rho(p_1/p_2)[Y - p_1q_1]^{(\rho-1)} = 0\)

\(\rho q_1^{(\rho-1)} = \rho(p_1/p_2)[Y - p_1q_1]^{(\rho-1)}\)

\(q_1^{(\rho-1)} = (p_1/p_2)[Y - p_1q_1]^{(\rho-1)\)

\(q_1^{(\rho-1)} = (p_1/p_2)^{(1-\rho)}[Y - p_1q_1]^{(\rho-1)}\)

\(q_1^{(\rho-1)} = (p_1/p_2)^{(1-\rho)}(Y - p_1q_1)^{(\rho-1)}\)

\(q_1^{(\rho-1)} = (p_1/p_2)^{(1-\rho)}(Y^{(\rho-1)} - (\rho-1)p_1q_1(Y - p_1q_1)^{(\rho-2)})\)

  This equation represents Michael's optimal \(q_1\) as a function of his income (Y) and the prices (\(p_1\) and \(p_2\)).

3. Similarly, we can derive a similar expression for his optimal \(q_2\):

\(q_2^{(\rho-1)} = (p_2/p_1)^(1-\rho)(Y^{(\rho-1)} - (\rho-1)p_2q_2(Y - p_1q_2)^{(\rho-2)})\)

  This equation represents Michael's optimal \(q_2\) as a function of his income (Y) and the prices (\(p_1\) and \(p_2\)).

Therefore, these equations, which depend on Michael's income and the prices of the commodities, determine the ideal values of \(q_1\) and \(q_2\).

Learn more about Michael's utility function on:

https://brainly.com/question/25077729

#SPJ4

Based on the information given, it should be noted that there is a way to use this principle to create a motor.

It should be noted that when an electric current is passed through an iron nail, there'll be an electromagnet that's created.

In such a case, the magnet will pick up small objects and this demonstrates that electrical energy can be converted into mechanical energy. This can be applicable to a motor when a wire is put in between the two paper clips that are connected to the battery. At the bottom, there's a magnet that acts as the conductor and thereby, electrical energy can be converted into mechanical energy.

Read related link on:

https://brainly.com/question/21928664

Answer:

C

Explanation:

When the planet is closest to the Sun, speed v and kinetic energy are the highest, and gravitational potential energy is the lowest.

The satellite has the least gravitational potential energy at point C.

The energy that an item has or acquires when its location changes as a result of being in a gravitational field is known as gravitational potential energy. Gravitational potential energy can be defined as an energy that has a connection to gravitational force or gravity.

Gravitational potential energy of the satellite is = - GMm/r.

Where, M and m are the masses of the satellite and the planet and r is the distance.

Gravitational potential energy is negative because gravitational force is attractive in nature.

Hence, the gravitational potential energy decreases as the separation between the planet and the satellite decreases. Hence, the satellite has the least gravitational potential energy at point C.

Learn more about gravitational potential energy here:

https://brainly.com/question/19768887

#SPJ5

Answer:

Average speed = 13.5 m/s

Explanation:

Since the car is running at a speed of 27 m/s  and it stops after 3 seconds by applying the brake. Therefore, the initial speed of the 27 m/s and final speed is 0.

Use below formula to find the average speed :

Average speed = (Initial speed + final speed ) / 2  

Average speed = (27 + 0 ) / 2

Average speed = 13.5 m/s

When a body is positively charged, it implies that there is positive as well as negative charge in the body but the positive charge is more than negative charge.

Most of the materials that make up our world are composed of atoms, which are made up of a nucleus containing protons and neutrons surrounded by electrons. When an atom loses or gains electrons, it becomes positively or negatively charged, respectively. This is because the number of protons in an atom, which determines its atomic number and chemical properties, does not change.

When there are more protons than electrons, the atom becomes positively charged, and when there are more electrons than protons, it becomes negatively charged.Positive charge is the property of a material that has lost one or more electrons and therefore has more protons than electrons. Positive charges repel other positive charges, while negative charges attract positive charges.

To know more about neutrons visit:

https://brainly.com/question/31977312

#SPJ11

The condition new jersey representatives include in the resolution for a nuclear freeze is verifiable.

The nuclear freeze was a campaign for mass resolution in the United States during the late 1980's to secure an argument between the U.S and Soviet arguments to halt the testing, production, and deployment of nuclear weapons.

Halting an atomic weapon is theoretically possible, but in reality, it is an enormous challenge. The Russian invasion of Ukraine has raised the fear of of nuclear weapons to a level not seen since the Cold War.

Thus, the main challenge is now rising that how can one protect themselves from nuclear radiation after a war.

To learn more about Nuclear Freeze, here

brainly.com/question/1890464

#SPJ4

The current flowing in the wire is 8 A.

According to the formula of current, the current is equal to the amount of charge flowing through a wire in a unit of time. Thus, the formula for current can be expressed as; I = Q/t where I = current in Amperes (A); Q = amount of charge in Coulombs (C) t = time in seconds (s). Given, Q = 2.0 C, and t = 0.25 s.

Substituting the above values in the formula; I = Q/t; I = 2.0/0.25; I = 8 A. Therefore, the current flowing in the wire is 8 A.

Learn more about current here:

https://brainly.com/question/15912115

#SPJ11

A parallel-plate capacitor with circular plates of 10 cm radius and a separation of 120 mm has a capacitance of 9.27 pF.

The capacitance of a parallel-plate capacitor is directly proportional to the area of the plates and inversely proportional to the separation between the plates. This is because the larger the area of the plates, the more charge can be stored on them.

The smaller the separation between the plates, the stronger the electric field between them, and the more charge can be stored. In this case, the capacitance is relatively small because the separation between the plates is relatively large. If the plates were brought closer together, the capacitance would increase.

This can be calculated using the following formula:

C = (epsilon_0 * A) / d

where:

* C is the capacitance in Farads

* epsilon_0 is the permittivity of free space (8.85 x 10^-12 F/m)

* A is the area of the plates in square meters

* d is the separation between the plates in meters

In this case, the area of the plates is pi * (10 cm)^2 = 78.54 square centimeters, and the separation between the plates is 0.12 m. Substituting these values into the formula, we get:

C = (8.85 x 10^-12 F/m * 78.54 square centimeters) / 0.12 m = 9.27 pF

Learn more about capacitors here; brainly.com/question/31627158

#SPJ11

Answer:

It uses electromagnets to create a rotating magnetic field.

Explanation:

I remember learning this in AP Physic class. The interaction between the two fields causes the rotor to turn and it creates a magnetic field!

Answer:

It generates a rotating magnetic field using electromagnets.

The statement, "The Voyager 1 space probe can't change its own motion" is correct and true. The Voyager 1 space probe was launched by NASA in 1977, and since then it has traveled over 14 billion miles away from Earth. It's the most distant spacecraft from Earth.

For such more question on motion

https://brainly.com/question/26083484

#SPJ8

The major functions of the bones are body support, facilitation of movement, protection of internal organs, storage of minerals and fat, and hematopoiesis.

Explanation:

It protects your organs

allows movement

gives the body shape

it store minerals

Magnetism is a mysterious force in this universe. Scientists don't fully understand why it occurs in the first place. They aren't sure why these particles have a north and south direction either, according to Live Science, and there are many different forms of magnetism.

Anything that creates a magnetic field is considered to be a magnet. The most notable characteristic of a magnet is a force that pulls on other ferromagnetic materials, such as iron, steel, nickel, cobalt, etc., and attracts or repels other magnets. This invisible magnetic field is responsible for this property.

A substance or object that generates a magnetic field that has the potential to impact objects nearby. Magnetic materials, such as iron, are drawn to a magnet. A magnetic field is always present in permanent magnets. One of a magnet's two poles is its centre of the magnetic field.

Learn more about Magnets here:

https://brainly.com/question/14997726

#SPJ4

Answer:

F = 2.8 =16N

Explanation:

Answer:

114.29s

Explanation:

average speed = distance/Time

Given

speed = 7m/s

distance = 800m

Required

Time taken by the runner to complete the race

From the formula:

Time = Distance/speed

Time = 800/7

Time = 114.29seconds

Hence it took the runner 114.29s to complete the race

Answer:

Perfectly elastic collisions can happen only with subatomic particles. Everyday observable examples of perfectly elastic collisions don't exist—some kinetic energy is always lost, as it is converted into heat transfer due to friction.

Answer:

t = 2.01 seconds

Explanation:

It is given that,

The acceleration of the elevator is 4.55 m/s².

We need to find time taken by you to reach a speed of 11 m/s

The initial velocity of the person is equal to 0 (at rest). Let t is the time.

Using equation of kinematics as follows :

v = u +at

Acceleration = g-a and u = 0

So,

\(t=\dfrac{v}{g-a}\\\\t=\dfrac{11}{10-4.55}\\\\t=2.01\ s\)

So, 2.01 seconds is taken to reach a speed of 11 m/s.

Answer:

150 N= 15 or 150 N= 1.1

Explanation:

What I did was subtract 165kg and 150 N and I divided it too but I got 1.1 so yuhh