if the density of lead is 8.7 and teh densityof aluminum is 1.0 the numerical value of the desnity of the composite speher is

The type of asteroid that would appear darkest and reflect the least light is type option E) S.

Among the given options, type E) S asteroids would appear darkest and reflect the least amount of light. Asteroids are classified into different types based on their composition, and type S asteroids belong to the silicate group. They are made up of rocky materials, such as silicates and metals, and they tend to have a relatively low albedo.

Albedo refers to the amount of light an object reflects, and a low albedo means that the object absorbs more light than it reflects. As a result, type S asteroids appear darker because they absorb a significant portion of the incident light rather than reflecting it. Their dark appearance is due to their composition and surface properties.

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To determine the new retained earnings as of July 31, 20rd, we can use the given information:

Retained earnings, July 1, 20rd: $259,725

Increases: Net income (Part B) = $10,325

Decreases: Dividends (Part C) = $12,000

The calculation for new retained earnings, July 31, 20rd would be:

Retained earnings, July 31, 20rd = Retained earnings, July 1, 20rd + Increases - Decreases

Retained earnings, July 31, 20rd = $259,725 + $10,325 - $12,000

Retained earnings, July 31, 20rd = $258,050

Therefore, the new retained earnings as of July 31, 20rd is $258,050.

The statement of cash flows for July would be as follows:

Statement of Cash Flows for July

Cash flows from operating activities:

Cash inflows:

Cash from customers $68,000

Cash outflows:

Payments for rent $(5,600)

Payments for supplies $(62,600)

Payments to creditors $(12,800)

Payments for utilities $(4,750)

Net cash flows from operating activities $(17,750)

Cash flows from investing activities:

Cash outflows:

Purchase of land $(150,000)

Net cash flows from investing activities $(150,000)

Net increase (decrease) in cash $(179,750)

Plus: Cash balance, July 1, 20rd $294,000

Cash balance, July 31, 20rd $114,250

Please note that the information provided assumes a cut-off date of July 31, 20rd.

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The answer is A, Hope this helps and sorry for being late :)

From the position-time graph, we have the following:

Distance covered Time

0 to 28 m 0 to 20 seconds

28m to 52 m 20 to 60 seconds

At 52 m 60 to 80 seconds

52 to -20m 80 to 110 seconds

Let's find the average speed for the entire trip.

To find the average speed, apply the formula:

Distance at line 1: 28 - 0 = 28m

Distance at line 2: 52 - 28 = 24 m

Distance at line 3: 0 m

Distance at line 4: -20m - 52 = -72 m

Thus, we have the equation:

Where:

d1 = 28 m

d2 = 24 m

d3 = 0 m

d4 = 72 m

t = 110 s

Now substitue values into the equation:

Therefore, the average speed for the trip is 4.4 m/s.

ANSWER:

Equation:

Substitution:

Calculation:

Answer: Innovations originally designed for space vehicles, including artificial muscle systems, robotic sensors, diamond-joint coatings, and temper foam,

Explanation: make artificial human limbs more functional, durable, comfortable, and life-like.

The correct order of increasing impedance is:

C. PZT, gel, skin, matching layer

Impedance is a measure of the opposition to the flow of sound waves in a medium. It depends on the density and speed of sound in the material. In the given options, the order of increasing impedance can be determined by considering the properties of the materials involved.

PZT (lead zirconate titanate) has a higher impedance than gel, skin, and the matching layer. PZT is a piezoelectric material commonly used in ultrasound transducers and has a higher density and speed of sound, leading to higher impedance.

Gel has a lower impedance compared to PZT but higher impedance than skin and the matching layer. Gel is used as a coupling medium between the transducer and the skin to enhance acoustic coupling and minimize impedance mismatch.

Skin has a lower impedance than both gel and the matching layer. It is the outermost layer and acts as an interface between the transducer and the biological tissue.

The matching layer has the lowest impedance among the given options. It is designed to match the impedance of the PZT to the impedance of the tissue being imaged, facilitating efficient sound transmission.

Therefore, the correct order is C.

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Answer:

reviewing the statement we can say that it is FALSE

Explanation:

The Doppler effect is the change in the perceived frequency of a sound wave by the RELATIVE MOTION of the source and the observer.

This effect is very useful for finding the speed of an object.

When reviewing the statement we can say that it is FALSE

Answer:

A. Create habitats for coral, but not fish

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  

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

An aluminium wire's cross-sectional area is\(A = 3.1 * 10^{-5} m^{2}\), and its length is L = 0.17 m.

The resistance of an aluminum wire is given by the formula:

\(R = \frac{\rho L}{A}\)

Where R = resistance, ρ = resistivity of aluminum, L = length of wire, and A = cross-sectional area of wire.

So that we can solve for A, we can rearrange the equations as follows

\(A =\frac{ \rho L}{R}\)

Plugging in the given values, we have:

\(A =\frac{ (1.7 * 10^{-8} Ohm*m)(L)}{(0.1 Ohm)}\)

Solving for L,

\(L = \frac{(0.1 Ohm)(A)}{(1.7 * 10^{-8} Ohm*m)}\)

We also know that the mass of the aluminum wire is 54 g. The following formula determines a wire's mass:

\(m = \rho AL\)

In order to find A, we can rearrange the equation as follows:

\(A = \frac{m}{(\rho L)}\)

Plugging in the given values, we have:

\(A =\frac{ (54 g)}{((1.7 *10^{-8} Ohm*m)(L))}\\A = 3.1 * 10^{-5} m^{2}\)

Combining the two equations, we obtain:

\(L =\frac{ (54g)(0.1 Ohm)}{((1.7 * 10^{-8} Ohm*m)(A))}\)

L = 0.17 m

Therefore, the cross-sectional area  is \(A = 3.1 * 10^{-5} m^{2}\) and L = 0.17 m is the length of an aluminium wire.

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Answer:

see below

Explanation:

I will assume you made  a typo error and use 10 km rather than 10 m  

Closing speed is  2 + 3 = 5 m/s

  they will cover the 10 km (?) in    10 km / 5 m/s = 10000m /5 m/s =

                   2000 seconds =   33 min and 20 sec

Answer:

1. goes to B.

2. goes to D.

3. goes to A.

4. goes to C.

I had to do this in 8th grade so if im wrong sorry.

If im right please mark me brainliest

The speed of the projectile when it strikes the ground below is approximately 620.6 m/s.

We can use the kinematic equations of motion to solve this problem.

First, we can find the time it takes for the projectile to hit the ground using the vertical motion equation:

y = vi*t + (1/2)at²

where y is the vertical displacement (in this case, the initial height of the cliff), vi is the initial vertical velocity (in this case, zero), a is the acceleration due to gravity (-9.8 m/s^2), and t is time.

Plugging in the values, we get:

265 m = 0t + (1/2)(-9.8 m/s²)*t²

Solving for t, we get:

t = √((2*265 m) / (9.8 m/s²)) = 8.25 s

Next, we can find the horizontal displacement of the projectile using the horizontal motion equation:

x = v*t

where x is the horizontal displacement, v is the initial horizontal velocity, and t is time.

Since the initial velocity is at a 45-degree angle, we can break it down into its horizontal and vertical components:

v_initial_x = v_initial*cos(45 degrees) = 350 m/s * cos(45 degrees) = 247.5 m/s

v_initial_y = v_initial*sin(45 degrees) = 350 m/s * sin(45 degrees) = 247.5 m/s

The horizontal displacement can now be calculated as:

x = v_initial_x * t = 247.5 m/s * 8.25 s = 2041.9 m

Finally, we can find the speed of the projectile when it hits the ground using the total velocity equation:

v_final² = v_initial_x² + v_initial_y² + 2ay

where v_final is the final velocity, v_initial_x and v_initial_y are the horizontal and vertical components of the initial velocity, and y is the vertical displacement.

Plugging in the values, we get:

v_final² = (247.5 m/s)² + (350 m/s)² + 2*(-9.8 m/s²)*(265 m)

Solving for v_final, we get:

v_final = √((247.5 m/s)² + (350 m/s)² + 2*(-9.8 m/s²)*(265 m)) = 620.6 m/s

Therefore, the speed of the projectile when it strikes the ground below is approximately 620.6 m/s.

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As the number of resistors in a series circuit increases, the overall resistance increases.

A series circuit is a current pathway that lets electrons flow to one or more resistors.

In series circuit, the current flowing in each circuit component is the same, while the voltage across the circuit components are differnt.

The equivalent resistance of a series curict is obtained by adding all the inididual resistance of the circuit.

Re = R1 + R2 + R3

where;

So in a series circuit, as the number of resistance increases, the overall resistance or equivalent resistance increases.

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B. Chemical potential energy is not involved in hitting a tennis ball.

When hitting a tennis ball, the kinetic energy of the racquet is transferred to the ball, causing it to move. The kinetic energy of the racquet comes from the work done by the player, which may involve converting chemical potential energy stored in food into kinetic energy. However, the chemical potential energy is not directly involved in hitting the ball.

In addition, the other three options (kinetic energy, gravitational potential energy, and elastic potential energy) are all involved in hitting a tennis ball. The kinetic energy of the ball and racquet are important in causing the ball to move, the gravitational potential energy may affect the trajectory of the ball, and the elastic potential energy stored in the racquet and ball may be converted to kinetic energy upon impact.

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Answer:

210 m/s

Explanation:

We will use this equation for an elastic collision:

In this case, m₁ = mass of golf ball (0.046 kg) and m₂ = mass of the golf club (0.22 kg).

v₁ is 0 m/s since the ball is at rest on the tee.

v₂ is 44 m/s, given in the problem.

v₁ is what we are trying to find.

v₂ is 0 m/s since the ball will be at rest on the ground.

Plug these values into the elastic collision equation:

Simplify this equation.

Get rid of the units.

Multiply the left side of the equation.

Divide both sides by 0.046.

The speed of the ball when it leaves the tee is about 210 m/s.

Answer: Movement in which all positions of both the waves rotate around the directions at right angles to the axis of the wave's movement.

Explanation: Hope this help

Fermentation is a process in which yeast or bacteria break down sugars to produce energy, releasing carbon dioxide gas as a byproduct. In this experiment, yeast is added to each bottle of water, along with varying amounts of sugar. The yeast will consume the sugar and produce carbon dioxide gas, which will inflate the balloons on the bottles.

Based on what is described, my prediction for this experiment is that bottles 2, 4, and 6 will produce more gas than bottles 1, 3, and 5. This is because bottles 2, 4, and 6 have sugar added to the yeast-water mixture, which will provide a source of food for the yeast. The yeast will ferment the sugar, producing carbon dioxide gas as a byproduct. Bottles 1, 3, and 5 do not have any added sugar, so the yeast will only be able to ferment any natural sugars present in the water or from the yeast itself, which will likely result in less gas production. The balloons placed over the bottle mouths will allow us to observe the gas production visually as they inflate due to the gas produced during fermentation.

Hence, I predict that the balloons on bottles 2, 4, and 6 will inflate more than the balloons on bottles 1, 3, and 5.

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Answer:

True.

Explanation:

Answer:

'Wave' is a common term for a number of different ways in which energy is transferred: In electromagnetic waves, energy is transferred through vibrations of electric and magnetic fields. In sound waves, energy is transferred through vibration of air particles or particles of a solid through which the sound travels.

Low energy electromagnetic waves have lower frequencies and longer wavelengths compared to high energy electromagnetic waves. They carry less energy per photon and are less damaging to biological tissue.

Low energy electromagnetic waves, such as radio waves and microwaves, have lower frequencies and longer wavelengths. They carry less energy per photon compared to high energy electromagnetic waves, like X-rays and gamma rays. As a result, low energy waves are less damaging to biological tissue. They are commonly used for communication and heating applications. However, due to their longer wavelengths, they have limited penetration abilities and are easily absorbed or scattered by obstacles. High energy electromagnetic waves, on the other hand, have shorter wavelengths and higher frequencies. They carry more energy per photon, making them potentially harmful to living organisms. These waves can penetrate through materials and are used in medical imaging and radiation therapy, but they require careful handling and protection.

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The forces applied on the bucket are tension and gravitational.

What is the gravitational force?

According to Newton’s gravitational law, it is the force exerted due to attraction between two objects that is directly proportional to the product of their masses and is inversely proportional to the square of distance between them.

The force applied to the bucket containing water is gravitational force. The gravitational force acts in downward direction and there is no change in the state of motion. There is another force as well which is the muscular force by which we hold the bucket in the upward direction with the help of our muscles. Tension is also exerted on the bucket as this force is seen in existence when any object is being pulled up with the help of string or rope. It is always seen in the direction which is parallel to the rope.

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Steve's negligence in leaving the truck's motor running in neutral and forgetting to set the parking brake resulted in a series of events that caused the truck to crash into a gas station pump.

Steve, a driver for QRI, made a careless mistake while making a delivery. He left the truck's motor running in neutral and forgot to set the parking brake. As a result, the truck rolled and crashed into a nearby gas station pump. This caused a fire to ignite, which spread quickly to a construction site a block away.

There are several factors at play here that contributed to the chain of events. First, leaving the truck's motor running in neutral allowed it to move freely without any control. Second, forgetting to set the parking brake meant there was no additional mechanism to keep the truck stationary.

The collision with the pump caused a rupture, resulting in a fuel leak. The ignition source, possibly a spark or heat from the impact, ignited the fuel and started a fire.

The fire then spread to the nearby construction site. Construction sites often contain materials that are combustible, such as wood, paint, or fuel. The proximity of these materials to the gas station allowed the fire to easily extend to the construction site.

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The component of the circuit being used to measure current is always linked in series with an ammeter, which is a low resistance instrument designed to measure current.

A tool used to gauge the current moving across a circuit is an ammeter. The name "ampere" comes from the units used to measure electric currents. The ammeter and the circuit where the current is to be measured are normally connected in series.

An instrument known as an ammeter can be used to measure either direct current or alternating current. One ampere is the standard unit of current, as we all know.

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