Based on what you know about observations of the interstellar medium at wavelengths other than for visible light, select all of the correct statements from the following list.-The 21-cm radio observations are of neutral hydrogen.-Much interstellar dust between stars is not visible.-The source of hot gas observed at X-ray wavelengths is not known.-All interstellar material is cool.-Interstellar dust is observed at ultraviolet wavelengths.-Giant molecular clouds consist mostly of CO molecules.-Material observed at wavelengths longer than that of visible light is usually cool.

Answer:

A

Explanation:

The gravitational force between a 60kg woman and an 80kg man standing 10m apart is approximately 0.0392 N. When practically touching at 0.3m between their centers, the force increases to approximately 0.9807 N.

The force is 2.39x10^-8 N when they are 10m apart and 5.87N when they are practically touching. The gravitational force between two objects can be calculated using the formula:

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

where F is the gravitational force, G is the gravitational constant (6.674 x 10^-11 N*m^2/kg^2), m1 and m2 are the masses of the objects, and r is the distance between their centers.

For the first scenario, where the woman and man are 10 m apart:

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

F = (6.674 x 10^-11 N*m^2/kg^2) * (60 kg * 80 kg) / (10 m)^2

F = 2.39 x 10^-8 N

Therefore, the gravitational force between the woman and man is 2.39 x 10^-8 N when they are 10 m apart.

For the second scenario, where they are practically touching with a distance of 0.3 m between their centers:

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

F = (6.674 x 10^-11 N*m^2/kg^2) * (60 kg * 80 kg) / (0.3 m)^2

F = 5.87 N

Therefore, the gravitational force between the woman and man is 5.87 N when they are practically touching with a distance of 0.3 m between their centers.

know more about gravitational constant here: brainly.com/question/17239197

#SPJ11

Answer:

c. 80%

Explanation:

Given;

load raised by the machine, L = 360 N

distance through which the load was raised, d = 0.2 m

effort applied, E = 50 N

distance moved by the effort, e = 1.8 m

The efficiency of the machine is calculated as follows;

\(Efficiency = \frac{ 0utput \ work }{1nput \ work} \times 100\% \\\\Efficiency = \frac{Load \ \times \ distance \ moved \ by \ load }{Efort \ \times \ distance \ moved \ by \ effort} \times 100\%\\\\Efficiency = \frac{360 \times 0.2}{50 \times 1.8} \times 100\%\\\\Efficiency =80\%\)

Therefore, the efficiency of the machine is 80%

The ratio of the tangential speed of a point on the rim to the tangential speed of a point halfway between the center and the rim is 2.

The correct option is B.

The wheel's angular velocity The rate at which the angular displacement changes over time is known as the wheel's angular velocity. Because the angular velocity is constant, a point just on rim will have constant tangential velocity.

The angular velocity of a body refers to the pace at which it revolves or circumambulates an axle. Sometimes, the Greek letter omega symbolizes angular velocity. Due to the fact that it is expressed as an angle every unit of time, the angular velocity in the SI was measured in radians per second.

To know more about Angular velocity visit:

https://brainly.com/question/12446100

#SPJ9

Answer:

b. Comfortable pair of athletic shoes.

Explanation:

Analyzing the information and the options, the fitness product that would most assist Sergio in reaching his weight loss goals would be the pair of comfortable sports shoes, which he could use to do running exercises.

For beginning practitioners it is ideal to start exercising with short 30-minute walks until the body adapts and you gain physical conditioning and endurance.

Running has the advantage of being an excellent exercise that can be practiced anywhere, and helps in the production of dopamine, which produces a feeling of well-being and also helps in reducing hunger, in addition to working and strengthening various muscle groups in the body, activate blood circulation, decrease anxiety, improve cholesterol levels, control blood pressure, etc.

Answer:

b. Comfortable pair of athletic shoes.

Explanation:

The acceleration of the ball is  0.813m/s^2

We know that according to second law of motion,

F= ma

Total force = 10N+2.2N= 12.2N

M= 15 kg

a= F/M = 12.2/15= 0.813m/s^2

Newton's first law of motion describes the behavior of objects whose forces are all balanced. The first law, often known as the law of inertia, asserts that if the forces acting on an object are balanced, the object's acceleration is 0 m/s/s. Objects in equilibrium (the state in which all forces are equal) will not accelerate. Newton stated that an object will only accelerate if it is subjected to a net or unbalanced force. An item will accelerate in the presence of an imbalanced force, changing its speed, direction, or both speed and direction.

To learn more about acceleration  visit:https://brainly.com/question/12550364

#SPJ9

So, the power that used by the washing machine is 400 Watt.

Hi ! Here, I will help you to calculate the power generated. Power is work done per unit time. If a person or machine can do a large amount of work in the shortest possible time, it will produce or require a large amount of power. The relationship between power, work, and time is expressed in the equation:

\( \boxed{\sf{\bold{P = \frac{W}{t}}}} \)

With the following condition :

We know that :

What was asked :

Step by step :

\( \sf{P = \frac{W}{t}} \)

\( \sf{P = \frac{7,200}{18}} \)

\( \boxed{\sf{P = 400 \: Watt}} \)

So, the power that used by the washing machine is 400 Watt.

The total mechanical energy of the bicyclist is 1400 J, obtained by adding her potential energy of 720 J and kinetic energy of 680 J. The correct answer is option B.

For more questions on mechanical energy

https://brainly.com/question/28154924

#SPJ8

Answer:

B. A well-tested explanation for a widely accepted hypothesis

Explanation:

This is true about a scientific theory going by the fact of it being a well tested explanation. For example, in one of the Newtons law of motion which he stated to be "To every action, there is equal and opposite reaction", the hypothesis has been known till he was able to offer a well tested explanations with calculations showing that, it was actually true.

Answer:

\(-9.06\:\mathrm{m/s^2}\)

Explanation:

We can use the following kinematics equation to solve for acceleration:

\(v_f=v_f+at\).

Solving for \(a\):

\(45=93+5.3a,\\-48=5.3a,\\a\approx \boxed{-9.06\mathrm{m/s^2}}\)

*Note: Since acceleration is a vector quantity, it has both magnitude and direction. The negative sign implies that the acceleration is in the opposite direction of the racing dragster's movement.

The precise value of sin 60 degrees is 3/2, as solved by trigonometry.

0° Cos = Sin 90° = 1

Cos 30°= Sin 60°= 1/32

45° Cos = Sin 45° = 1/2

60° Cos = Sin 30° = 1/2

90° Cos = Sin 0° = 0

Also,

Tan 0 degrees = Sin 0 degrees/Cos 0 degrees = 0 degrees

Tan 30 degrees = Sin 30 degrees/Cos 30 degrees = 1/3

Tan 45 degrees = Sin 45 degrees/Cos 45 degrees = 1

Sin 60°/Cos 60° = 3

Sin 90°/Cos 90°= Tan 90°

The above trigonometric ratio values are in degrees. We can also talk about the values in terms of radians. Radians are used for unit circles with radius one. The radian is represented as.

For more information on value of sin 60° kindly visit to

https://brainly.com/question/1602098

#SPJ4

The theory of liquidity preference is most helpful in understanding (c) the interest-rate effect.

The liquidity preference theory, introduced by John Maynard Keynes, explains how individuals' preferences for holding liquid assets, such as money, affect the demand and supply of money in an economy. According to this theory, the demand for money is determined by individuals' desire to hold liquid assets for transaction purposes and as a precautionary measure.

The interest-rate effect is one of the channels through which the theory of liquidity preference operates. It suggests that the demand for money is inversely related to the prevailing interest rate. When interest rates are high, individuals tend to hold less money and prefer to invest in interest-bearing assets, such as bonds or savings accounts. Conversely, when interest rates are low, individuals are more willing to hold money as it becomes less costly to do so compared to other interest-bearing investments.

Therefore, the theory of liquidity preference helps in understanding how changes in interest rates influence the demand for money and, consequently, affect economic variables such as investment, consumption, and aggregate demand.

Learn more about liquidity at: https://brainly.com/question/921670

#SPJ11

Calculate the temperature change in each beaker during the course of the first 1 min and the next 500 to 600 seconds. Comparing this to

What does temperature in physics actually mean?

Many people have an obsession with checking a forecast to find out the day's temperature. The average kinetic energy of each molecule in a substance is measured by its temperature. Despite the fact that the two variables are closely related, it differs from heat.

What distinguishes an object's energy from its temperature?

As was mentioned, an object's energy is extensive while its temperature is intense. The block may still be hotter even if the liquid has more energy. (2) "Two things with equal heat in thermal equilibrium" improper use of heat. Energy is transferred by heat. Heat does not 'exist' in an object.

To know more about temperature visit:

https://brainly.com/question/15809796

#SPJ1

Answer:

The estimated volume of a standard table tennis ball is approximately 2.7 cm³.

The estimated volume of a standard golf ball is approximately 41.6 cm³.

Explanation:

increases Below a temperature of 4°C (39°F), water exhibits an unusual behavior. As the temperature decreases,

water molecules begin to form a lattice-like structure due to hydrogen bonding. This arrangement causes the water molecules to spread out, leading to an increase in volume and a decrease in density. This phenomenon is known as the expansion of water upon cooling. When water reaches its maximum density at around 4°C (39°F), it starts to contract as the temperature decreases further. This behavior is the reason why ice floats on water, as it is less dense than the liquid water.

Learn more about lattice-like structure  here:

https://brainly.com/question/3406784

#SPJ11

Answer:

When a proton is placed directly in the path of the proton cannon, it will experience a strong electromagnetic force. The proton cannon emits a beam of protons at high energy and velocity. When the proton in the path of the cannon interacts with the beam, there will be a collision between the two protons.

During the collision, the protons may undergo a process called scattering, where they change direction and momentum. The exact outcome of the collision depends on the energy and angle of the incoming proton, as well as the properties of the target proton. It is possible that the protons may scatter off each other, transferring energy and momentum in the process.

In some cases, the collision may result in the absorption of the incoming proton by the target proton. This can lead to the formation of a more massive particle or the emission of other particles. The specifics of the interaction will depend on the energy and conditions of the proton cannon and the characteristics of the protons involved.

Overall, placing a proton directly in the path of a proton cannon will result in a collision and potential scattering or absorption of the protons, causing changes in their momentum and possibly leading to the creation of other particles.

\(\huge{\mathfrak{\colorbox{black}{\textcolor{lime}{I\:hope\:this\:helps\:!\:\:}}}}\)

♥️ \(\large{\underline{\textcolor{red}{\mathcal{SUMIT\:\:ROY\:\:(:\:\:}}}}\)

Answer:

acceleration = v-u/ t

= 15-10/5

= 5/5

= 1 m/s2

Explanation:

hope this helped you.

Answer:

\(\boxed {\boxed {\sf 1 \ m/s^2}}\)

Explanation:

Acceleration is the change in velocity over the change in time. Therefore, the formula for calculating acceleration is:

\(a= \frac{v_f-v_i}{t}\)

Since the body's velocity increased from 10 meters per second to 15 meters per second 15 m/s is the final velocity and 10 m/s is the initial velocity. The time is 5 seconds.

\(a= \frac{ 15 \ m/s - 10 \ m/s}{5 \ s}\)

Solve the numerator.

\(a= \frac{ 5 \ m/s }{5 \ s}\)

Divide.

\(a= 1 \ m/s/s\)

\(a= 1 m/s^2\)

The acceleration is 1 meter per second squared.

The force that must be applied on the brakes to hold the aircraft stationary is 84.51 kN (approx).

The force that must be applied on the brakes to hold the aircraft stationary is 84.51 kN.

Step 1:We can determine the exhaust gas temperature using the formulaT4 = T3 + (qin / (cp * m_dot)).Where,T3 = 1191.7 K (Given)qin = heating value of fuel × mass flow rate of fuel = 42,700 × 0.2 = 8,540 kJ/kgcp = specific heat at constant pressure = 1.005 kJ/kg.Km_dot = mass flow rate of air + mass flow rate of fuel = 10 + 0.2 = 10.2 kg/s

Putting all the values,T4 = 1191.7 + (8,540 / (1.005 * 10.2)) = 1191.7 + 84.85 = 1276.55 K

Step 2:The static thrust produced by the engine can be found out by the formula:

F = m_dot * (V2 - V1) + A2 * (P2 - P1)

Where,m_dot = mass flow rate of airA2 = area of the exhaust nozzleV1 = velocity of air at the engine inletV2 = velocity of air at the engine exitP1 = pressure of air at the engine inletP2 = pressure of air at the engine exitWe can use the simplified form of the above formula, which neglects the increase in the kinetic energy of the air in the combustor, the increase in the potential energy of the air from the inlet to the exhaust, and the change in the kinetic energy of the air from the inlet to the exhaust.F = m_dot * (Ve - V1) + Ae * (Pe - P1)

Where,Ve = velocity of air at the engine exitAe = area of the exhaust nozzlePe = pressure of air at the engine exitWe can calculate the value of Ve using the formula:Ve = sqrt(2 * cp * T4 * (1 - (P2 / P1)^((γ - 1) / γ))))Where,γ = ratio of specific heats = 1.4Putting all the values,Ve = sqrt(2 * 1.005 * 1276.55 * (1 - (1 / 12)^0.4))) = 724.23 m/sNow, we can calculate the static thrust,F = m_dot * (Ve - V1) + Ae * (Pe - P1)= 10.2 * (724.23 - 0) + (0.785 * (0.25)^2 * (12 * 10^3 - 95) * 10^3)= 74,044.47 N

Step 3:The force that must be applied on the brakes to hold the aircraft stationary is equal and opposite to the static thrust, that is, 74,044.47 N.

The value in kN will be: 74.04447/1000 = 74.04 kN.

Learn more about force here :-

https://brainly.com/question/30507236

#SPJ11

Answer:

lonic compounds generally form between elements that are metals and elements that are nonmetals. For example, the metal calcium (Ca) and the nonmetal chlorine (Cl) form the ionic compound calcium chloride (CaCl2). In this compound, there are two negative chloride ions for each positive calcium ion.

Explanation:

Answer:Ionic compounds generally form between elements that are metals and elements that are nonmetals. For example, the metal calcium (Ca) and the nonmetal chlorine (Cl) form the ionic compound calcium chloride (CaCl2). In this compound, there are two negative chloride ions for each positive calcium ion.

Explanation:

Answer:

When a baseball is pitched, hit and flies in the air, one or more of the physical principles formulated over 300 years ago by Sir Isaac Newton act on it. Folklore tells how the mathematician and physicist first realized the law of gravity while observing a falling apple. Had Newton watched a baseball game instead, he might have formulated all three laws of motion by the seventh-inning stretch.

I think it is right.

it would change it for it's format and identify it

The force needed to start the crate sliding on a wooden floor when the coefficient of static friction is 0.40 is 7206.4 N. To find the force needed to start the crate sliding, we need to calculate the maximum force of static friction that can act on the crate.

This is given by the formula Fstatic = μs N where Fstatic is the maximum force of static friction, μs is the coefficient of static friction, and N is the normal force acting on the crate. The normal force is equal to the weight of the crate, which is given as 18016 N. Therefore, we can substitute these values into the formula:

Fstatic = 0.40 × 18016 N
Fstatic = 7206.4 N

This means that a force of 7206.4 N is needed to start the crate sliding on the wooden floor. If a force greater than this is applied, the crate will start to slide. Therefore, the force needed to start the crate sliding on a wooden floor is 7206.4 N.

To know more about static friction visit:

https://brainly.com/question/13000653

#SPJ11

Answer:

2.72 km

Explanation:

(12.33 km)/ 1 hr * (1 hr)/ 60 min

0.2055 km/ min

distance=rate * time (assuming v is constant,

a=0)

(0.2055 km/ min)*(13.22 min)

2.72 km OR 2716.71 m

Answer:

A. Inertia

Explanation:

Answer:

A inertia is directly related to mass

Explanation:

inertia

Answer:

Pascal's law states that the pressure exerted anywhere in a confined incompressible liquid is transmitted equally in all directions irrespective of the area on which it acts and it always acts at right angles to the surface of containing vessel.

have a great day sister

a) The motion of the object between 15 s to 30 s is increasing velocity, to a constant velocity and finally a decreasing velocity.

(b) The average velocity of the object between 0 and 15 seconds is 0.167 m/s.

(c) The position of the object at 5.0 seconds is 0.5 m.

(d) Between 30 and 40 seconds, the velocity of the object is decreasing and the object is decelerating.

(a) The motion of the object between 15 s to 30 s can be described as increasing velocity, to a constant velocity and finally a decreasing velocity.

(b) The average velocity of the object between 0 and 15 seconds is calculated as;

average velocity = total displacement / total time

average velocity = (2.5 m - 0 m ) / ( 15 s - 0 s ) = 0.167 m/s

(c) The position of the object at 5.0 seconds is calculated as follows;

at 5.0 seconds, the position of the object is traced from the graph as 0.5 m.

(d) The motion of the object between 30 and 40 seconds is calculated as;

velocity = ( 0 m - 4 m ) / ( 40 s - 30 s ) = - 0.4 m/s

Between 30 and 40 seconds, the velocity of the object is decreasing and the object is decelerating.

Learn more about displacement - time graph here: https://brainly.com/question/19144777

#SPJ1

The answer of the following statement is (C) why joining a team is often really discouraging.

Team refers to a group of two or more people who work together to achieve a common goal. A team usually consists of individuals with different skills and abilities who collaborate to complete a task or project. Teams are important in a variety of situations, including work, school, sports, and social activities. A successful team is one in which members are committed to the same goal, trust and respect one another, and are willing to take risks and learn from mistakes. Teams are most effective when members are open to constructive criticism, provide feedback, and are willing to put in the time and effort necessary to achieve their goals.

To learn more about team
https://brainly.com/question/13033545
#SPJ1