we can see the moon because it we can see the moon because it glows through radioactive decay. reflects infrared light. reflects visible light. emits thermal radiation. emits visible light. t/f

The root-mean-squared speed of a sample of a pure substance in the gas phase is effected by a)temperature of the sample. So, correct option is A.

Genuinely, the root mean square (RMS) is the square foundation of the mean square, which is the number-crunching mean of the squares of a gathering of values. RMS is likewise called a quadratic mean and is an exceptional instance of the summed up mean whose example is 2. Root mean square is likewise characterized as a changing capability in view of a vital of the squares of the qualities which are quick in a cycle.

As such, the RMS of a gathering of numbers is the square of the number-crunching mean or the capability's square which characterizes the persistent waveform.

RMS is given by the below formula,

[tex]v_r_m_s[/tex] =√3KT/m

where K is Boltzmann constant,

T is the temperature,

and m is called as  mass of the gas particle.

Hence, correct option is A.

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(Complete question) is:

Which of the following parameters affect the root-mean-squared (rms) speed of a sample of a pure substance in the gas phase?

a)temperature of sample

b)boltzmann constant

c)both a and b

d)None of the above.

The arrow in a chemical reaction is translated to mean yields and reactions to form.

We know,

Conclusively you can say that The arrow in a chemical reaction be translated to mean yields and react to form.

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In the given figure we see the sketch of a pavement serviceability curve, label the axes, and indicate initial and terminal serviceability.

To fulfill the requirements of the Road Test, rather ordinary terms were given specific definitions as follows:

Present Serviceability: the ability of a specific section of pavement to serve highspeed, high-volume, mixed (truck and automobile) traffic in its existing condition. (Note that the definition applies to the existing condition that is, on the date of rating not to the assumed condition the next day or at any future or past date.)

This definition applies to the Road Test and can apply to any primary highway system, the system would easily be modified for use with city streets, farm roads, etc. Obviously, serviceability must be defined relative to the intended use of the road.

This is the sketch of a pavement serviceability curve, label the axes, and indicate initial and terminal serviceability

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The third law is also known as the law of action and reaction

FA = −FB.

Newton's third law states that when two bodies interact, they apply forces to one another that are equal in magnitude and opposite in direction. The third law is also known as the law of action and reaction (FA = −FB).

Formally stated, Newton's third law is: For every action, there is an equal and opposite reaction. The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object (FA = −FB).

For every action there is a reaction equal in magnitude and opposite in direction.

Examples of Newton's Third Law of Motion are:

Rowing a boat

Attraction of paper clip to a magnet

Recoil of a gun

Therefore, The third law is also known as the law of action and reaction (FA = −FB).

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According to 802.11 comedies the frequencies suitable for the Wireless networking R 2.5 GHz and 5.75 GHz.

The electromagnetic spectrum of the wave contains many types of electromagnetic waves.

Among these waves the waves used for the Wireless networking are radio waves.

The radio waves that are suitable as per the IEEE 802.11 for Wireless networking is suggested to be 2.5 GHz and 5.75 GHz.

These two frequencies are suitable for wireless communication because with their do not harm the environment and they do not intersect with each other.

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The torque about the origin is [tex]$2.0 \mathrm{Nm} \hat{i}-8.0 \mathrm{Nm} \hat{j}-12.0 \mathrm{Nm} \hat{k}$[/tex].

What is torque?

Torque[tex]$\vec{T}$[/tex] is the cross product between force [tex]$\vec{F}$[/tex] and vector position [tex]$\vec{r}$[/tex] respect a fixed point (in our case the origin):

[tex]\vec{\tau}=\vec{r} \times \vec{F}$$[/tex]

There are multiple ways to calculate a cross product but we're going to use most common method, finding the determinant of the matrix:

[tex]$\vec{r} \times \vec{F}=-\left[\begin{array}{ccc}\hat{i} & \hat{j} & \hat{k} \\ F 1_x & F 1_y & F 1_z \\ r_x & r_y & r_z\end{array}\right]$[/tex]

[tex]\begin{aligned}& \vec{r} \times \vec{F}=-\left(\left(F 1_y r_z-F 1_z r_y\right) \hat{i}-\left(F 1_x r_z-F 1_z r_x\right) \hat{j}+\left(F 1_x r_y-F 1_y r_x\right) \hat{k}\right) \\& \vec{r} \times \vec{F}=-((0(2.0 m)-0(-3.0 m)) \hat{i}-((4.0 N)(2.0 m)-(0)(0)) \hat{j}+((4.0 N)(-3.0 m)- \\& 0(0) \hat{k}) \\& \vec{r} \times \vec{F}=-2.0 N m \hat{i}+8.0 N m \hat{j}+12.0 N m \hat{k}=\vec{\tau}\end{aligned}[/tex]

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The kinetic energy of the emitted alpha particle is 9.53MeV.

The kinetic energy that the alpha particle has emitted, is the energy in excess after removing the resting energy of the atoms and the helium nucleus that forms the alpha particle

Since energy and masses are related and cannot be

         m₀ c² =  c² + m_He c²+ K

         K = c² (m₀ - m_{f} - m_He)

the mass of the Helium atom is 4 u

          K = (3 10⁸)² (211,988868 -207.976652 - 4,002) 1,661 10⁻²⁷

          K = 14,949 10⁻¹¹ (0.0102)

         K = 1,527 10⁻¹² J

let's reduce 1 J = 6,242 10¹² MeV

          K = 9.53 MeV

Therefore, The kinetic energy of the emitted alpha particle is 9.53MeV.

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A company determines the mean and standard deviation of approximately the mean distance between the number of sick days taken and the mean number of sick days taken by all employees.

What is standard deviation?

The term "standard deviation" (or "") refers to a measurement of the data's dispersion from the mean. A low standard deviation implies that the data are grouped around the mean, whereas a large standard deviation shows that the data are more dispersed.

Think about the following data: 2, 1, 3, 2, 4. The average and the total square of the observations' departures from the mean will be 2.4 and 5.2, respectively. This means that (5.2/5) = 1.01 will be the standard deviation.

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light from the headlight is traveling at speed of light , and you would say that the beam of light is traveling at Speed of light.

A fundamental premise of relativity is that everyone always measures the same speed of light, c, no matter how the observer or the light source may be moving. Note that this makes light different from material objects such as baseballs.

The speed of light in a vacuum, commonly denoted by c, is a universal physical constant important in many areas of physics. The speed of light, c, is exactly 299,792,458 meters/second (about 300,000 km/second; 186,000 miles/second; 671 million miles/hour). According to special relativity, c is the speed at which conventional matter or energy (and thus any signal carrying information) can travel in space.

All forms of electromagnetic radiation, including visible light, travel at the speed of light. For many practical purposes, light and other electromagnetic waves appear to travel instantaneously, but for long distances and highly sensitive measurements, finite velocities have significant implications.

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The length of the skid marks of a car of mass 1800 kg is 21.59 m.

Length is the distance between two points.

To calculate the length of the skid mark, we use the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the length of the skid marks is 21.59 m.

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(a) The resulting speed and direction of motion of the bowling ball in 1st graph is 0.71 m/s upward.

(B) The resulting speed and direction of motion of the bowling ball in 2nd graph is 0.71 m/s downward.

The impulse experienced by an object is the product of applied force and time of motion.

The impulse of object is also equal to the change in momentum of the object.

J = ΔP = Ft

For the first graph;

J = 5 N x ( 2 - 1 ) s

J = 5 N x 1 s

J = 5 Ns = 5 kg m/s

The speed of the object is calculated as;

v = J / m

where;

v = ( 5 kg m/s ) / ( 7 kg )

v = 0.71 m/s, upward

The impulse experienced by the object in the second graph is calculated as;

J = -5 N x 1 s

J = - 5 Ns = - 5kg m/s

v = J / m

v = - 5 kg m/s / 7 kg = - 0.71 m/s = 0.71 m/s, downward

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The speed of the wave is 1500m/s

The speed of a wave is determined by its wavelength and frequency. It is measured in meter per seconds. It is calculated from the expression speed= frequency ×wavelenghth. For example, if a wave has a wavelength of 5m and a frequency of 500 Hz , it's velocity is 500×5 =2500m/s

Similarly, the wave in question is of wavelength 3m and frequency 450 Hz , therefore it's speed will be calculated as ;

speed = frequency × wavelength

speed = 450×3= 1500m/s.

therefore the speed of the wave is 1500m/s.

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An object starts from rest then moves with constant acceleration for 5 seconds and travels a distance of 8 meters. The acceleration of the object is 0.64 m/s.

The given values are,

s = 8 meters,

a= ?

t=5 s.

Acceleration is measured in meters per second squared (m/s^2). It must be noticed that acceleration is a vector, so it also has a direction.

In particular,

Formula can be,

s=1/2 at² ,

where s= distance, a= acceleration, t =time

Therefore, a = 2s / (t²)

a = 2×8 / (5²)

  = 16 / 25

  = 0.64 m/s.

The acceleration of the object is 0.64 m/s.

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The magnitude of the impulse that was transmitted to your roof is 1.134 x 10⁵ kg/m/s.

In physics, size is simply described as "distance or quantity." It reflects the absolute or absolute motion the size in which an item moves in the idea of motion. It is utilized to define something's size or extent. Size in physics generally relates to a size or quantity.

The impact's force is 0.0307 N in magnitude.

The parameters are as follows: raindrop mass,

m = 0.0014 g = 0.0014 x 10³ kg

raindrop speed, v = 8.1 m/s

raindrop motion, t = 0.37 ms.

The roof impulse is calculated using the formula below:

J = ΔP = mv

J=(0.0014*)*(8.1)\sJ= 1.134* 10⁵ kg.m/s

The following methods are used to calculate the force of impact using Newton's second law of motion:

F=ma

N=0,0307 F=(mv)/t

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The complete question is -

A large raindrop--the type that lands with a definite splat--has a mass of 0.014 g and hits your roof at a speed of 8.1 m/s. part a what is the magnitude of the impulse delivered to your roof? express your answer with the appropriate units.

The equation for the line that must be expressed in slope-intercept form is:3 x -2 y=6Y = m x + c is the equation for the line in slope intercept form.

When the slope of the line being studied is known, and the provided point is also the y intercept, the slope intercept formula, y = mx + b, is utilized (0, b). The y value of the y interception point is represented by b in the equation.

The slope and intercept of a line show how steep it is, and the intercept shows where the line crosses an axis. It is possible to calculate an average rate of change using the slope and intercept, which describe the relationship between two variables.

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The GMAW-S process does not produce enough heat to make quality welds in sections much thicker than 1/4(6 mm) unless it is used for the root pass on a grooved weld or to fill gaps in joints.

The tension in each cord will be T₁ = 35.3 N and T₂ = 70.7 N

In a one-dimensional string, its is a scalar quantity. Tension is not negative. If the tension is zero, the string is slack.

Unlike ropes and cords, which have a length dimension but no cross section, ropes and cords have no mass. Since the tension is constant along the string, there is no non-oscillating or pulley bending as occurs with vibrating or pulleys.

According to Newton's third law, these are the forces exerted on the ends of a string or rope by the object to which the ends are attached. When a string vibrates, the frequency produced is determined by the tension. These frequencies are derived from Newton's laws of motion.

The relation to calculate the tension is given by:

ΣF' = ma

T₂-T₁-mg=ma

T₂= T₁+mg+ma

On plugging the values in the above relation, you get:

T₂=(35.3 N)+(3.2 kg)(9.81 m/s²)+(3.2 kg)(1.25 m/s²)

T₂=70.7 N

Thus, T₁ = 35.3 N and T₂ = 70.7 N are the tensions on each cord.

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(a) To estimate the radius of the asteroid, we can use the formula v = √(GM/r), where v is the escape velocity, G is the gravitational constant (6.67x10-11 m3/kg/s2), M is the mass of the asteroid, and r is the radius of the asteroid.

Since we know the escape velocity (1.80 m/s) and the mass of the asteroid (5000 kg/m3 x 4π/3 x r3, where r is the radius), we can solve for the radius.

We know that M = 5000 kg/m3 x 4π/3 x r3. Substituting this value for M into the equation v = √(GM/r) and solving for r, we get r = (GM/v2)1/3. Plugging in the values for G, M, and v, we get r = (6.67x10-11 m3/kg/s2 x 5000 kg/m3 x 4π/3 x (1.80 m/s)2)1/3, or r = 1.66 km.

(b) The escape speed of the asteroid is the speed required for an object to escape the gravitational pull of the asteroid. This can be calculated using the formula v = √(2GM/r), where v is the escape velocity, G is the gravitational constant (6.67x10-11 m3/kg/s2), M is the mass of the asteroid, and r is the radius of the asteroid.

Plugging in the values for G, M, and r (M = 5000 kg/m3 x 4π/3 x (1.66 km)3 and r = 1.66 km), we get v = √(2 x 6.67x10-11 m3/kg/s2 x 5000 kg/m3 x 4π/3 x (1.66 km)3)/(1.66 km), or v = 2.83 m/s.

(c) Yes, the Little Prince can take advantage of the rotation of the asteroid when he wants to orbit it. The minimum ground speed for orbit in this case is equal to the speed of the asteroid's rotation, which is 1.76 m/s.

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The gravitational force is the sole external force acting on an object falling through a vacuum.

A fall also involves the force of gravity pulling an object downward. The force of gravity is imbalanced at the beginning of the descent. The result is that the thing picks up speed or accelerates. It experiences aerodynamic drag or air resistance as it speeds.

As the only force acting on an object that is falling freely is the downward-acting force of gravity, the object feels weightlessness. The item accelerates at a rate equal to that of gravity. The object is subject to zero net force.

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