The outer circle illustrates the moon as it looks from Earth. Which of the following BEST explains why we see different phases of the moon each night from our position on Earth? The amount of sunlight reflected from the moon's surface changes each night.

Answer:

The earth is heating up.

Explanation:

This is due to human activities, primarily fossil fuel burning, which increases heat-trapping greenhouse gas levels in Earth's atmosphere.

Answer:

1. Pulley System - Pulleys can be used to effectively transfer force, change the direction of a force and/or increase the power of a force. This can be used to teach the students how basic machines can be used to help in everyday life.

2. Lever System - Levers can be used to teach students about how their daily tasks can be made easier using a machine. It also helps illustrate the law of the lever.

3. Wheel and Axle - This machine allows students to learn how a wheel and axle can increase the torque or rotational force on an object thus allowing heavy loads to be moved with less effort.

4. Inclined Plane - This machine teaches students about how even large objects can be moved with a ramp as its sloped shape reduces the force needed to move objects.

5. Screw -The screw allows students to learn how force is transferred from one point to another. It also introduces them to concepts such as rotational force and torque.

Answer:

Explanation:

So:

(

5

⋅

1

)

+

(

1

⋅

−

4

)

=

(

5

+

1

)

v

5

−

4

=

6

v

v

=

1

6

=

0.17

m

s

Answer:

\(\triangle \phi=461.5rad\)

Explanation:

From the question we are told that:

Silt width \(w=0.15=>0.1510^{-3}\)

Wavelength \(\lambda=462nm=462*10^{-9}\)

Angle \(\theta=26.9\)

Generally the equation for Phase difference is mathematically given by

\(\triangle \phi=\frac{2 \pi}{\lambda}(\frac{wsin\theta }{2})\)

\(\triangle \phi=\frac{2 \pi}{462*10^{-9}}(\frac{0.1510^{-3}*sin 26.9 }{2})\)

\(\triangle \phi=461.5rad\)

\(\triangle \phi=146.89\pi\)

Answer:

The magnetic field strength is H=I/2πr

Explanation:

A current I through a long, straight wire produces a magnetic field with strength H=2πr at distance of r from the wire. So the field strength is inversely proportional to the distance from the wire.

The generation, consumption, conversion, and exchange of thermal energy across physical systems is the focus of the thermal engineering field of study known as heat transfer.

Despite mercury having a far higher heat conductivity than water, this doesn't really matter in this situation. Here, H represents the heat transmission. Then, a key factor in this situation is the particular temperatures of these compounds. Compared to mercury, water has a substantially higher specific heat. So, unlike how the temperature of mercury has changed, the temperature of water won't fluctuate as much. Since the mass of both substances is the same, the system's end temperature will be considerably closer to the water's initial temperature.

To know more about heat transfer, click on the link below:

https://brainly.com/question/16055406

#SPJ4

The spring rate K is 3.33 x \(10 ^{3}\), the minimum hole diameter for the spring to operate in is 40mm, the total number of coils needed is 13.2

Spring rate K = load / deflection = 50/ 15 = 3.33 N/mm

minimum hole diameter for the spring to operate Do = D + d

C = D/d

10 = D / 4

D = 40mm

Do =D + d = 44mm

the total number of coils needed

Lf = nd + (n - 1) + δ

80 = n(4) + 15 +n-1

n = 65/5 = 13.2

An equilibrium length exists in an ideal spring. When a spring is compressed, a force is applied to either end that is proportionate to the length that has been reduced from the equilibrium length. If a spring is stretched, a force pulling each end to.ward the other h.as a magnitude proportional to the length increase from the equilibrium length. When a spring deviates from its equilibrium length, it exerts force on objects fastened to its ends that is proportional to that deviation and is always pointed in the direction of the equilibrium position. The spring constant, k, is a proportional constant. It gauges When a spring is squeezed or extended to the point that its length is altered,

Learn more about spring rate here:

https://brainly.com/question/14670501

#SPJ4

The system described by the transfer function G(s) = -co² s² + 2a + w², with a damping ratio of 1.3 and a natural frequency of 0.5, has an overdamped unit step response. So, the correct option is (E)

The transfer function of the system is given as G(s) = -co² s² + 2a + w², where co represents the damping ratio, a represents an arbitrary constant, and w represents the natural frequency of the system. We are given that the natural frequency is 0.5 and the damping ratio is 1.3.

To determine the type of unit step response, we need to analyze the damping ratio (co) in relation to the critical damping value (co_critical).

The critical damping ratio (co_critical) is defined as the value where the system is on the threshold between being overdamped and underdamped. It is given by the formula co_critical = 2 * sqrt(a * w²).

In our case, the natural frequency (w) is 0.5, so we can calculate co_critical as follows: co_critical = 2 * sqrt(a * 0.5²).

Since the damping ratio (co) is given as 1.3, we can compare it with co_critical to determine the type of unit step response.

If co > co_critical, the system is considered overdamped (Option E).

If co = co_critical, the system is considered critically damped (Option D).

If co < co_critical, the system is considered underdamped (Option C).

Based on the given values, we can determine that the system is overdamped (Option E) because the damping ratio (1.3) is greater than the critical damping ratio.

To know more about damping ratios, refer here:

https://brainly.com/question/31463018#

#SPJ11

Answer:

D.

Driving and talking on any type of cell phone increases the chance of missing traffic signals.

Explanation:

correct on edge2021

Answer:

the answer is d thank me later

Explanation:

Answer:

The bullet was 0.52 seconds in the air.

Explanation:

Horizontal Motion

It occurs when an object is thrown horizontally with a speed v from a height h.

The object describes a curved path ruled exclusively by gravity until it hits the ground.

To calculate the time the object takes to hit the ground, we use the following equation:

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

Note it doesn't depend on the initial velocity but on the height.

The bullet is fired horizontally at h=1.3 m, thus:

\(\displaystyle t=\sqrt{\frac{2\cdot 1.3}{9.8}}\)

\(\displaystyle t=\sqrt{\frac{2.6}{9.8}}\)

t = 0.52 s

The bullet was 0.52 seconds in the air.

Any substance on this earth is directly dependent on the gravitational force. The bullet fired horizontally will also faced the gravitational pull force.

To calculate the time the object takes to hit the ground, we use the following equation:-

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

The bullet is travelling in the air hence it does not depend on the velocity bt the mass. The height taken by the bullet is h=1.3m.

After putting the value to the equation, the answer will be as follows:-

\(t=\sqrt\frac{2*1.3}{9.8}\)

After solving the equation the value of time is 0.52 seconds

For more information, refer to the link:-

https://brainly.com/question/17858145

The sartorius muscle is the solution. A superficial muscle that runs the full length of the leg, the sartorius is involved in the flexion of the knee and hip.

The heart's wall is made up of cardiac muscle, which also causes the heart to contract vigorously. Intestinal, uterine, blood vessel, and internal ocular muscles are all made of smooth muscles.

The epidermis and some skeletal muscles are linked to the bones (muscles in our face). The skeletal muscles' contraction aids in the movement of the limbs and other bodily parts.

Although some estimates go as high as 840, the majority of sources claim that there are over 650 identified skeletal muscles in the human body.

Therefore, The sartorius muscle is the solution. A superficial muscle that runs the full length of the leg, the sartorius is involved in the flexion of the knee and hip.

To learn more about Sartorius muscle, refer to the link:

https://brainly.com/question/9184695

#SPJ1

Your question has been heard loud and clear.

Well , basically anything that moves in a certain direction is an example of unbalanced forces.

When we kick the football , the force given by our leg is greater than the frictional force by the ball and therefore the ball moves in the direction of the greater force , which is the force given by our leg.

Thank you

Answer:

friction

Explanation:

0.03M is  the concentration of sodium hydroxide.

Here from calculation concentration of NaOH -

100×0.019/ 20 = .095 M

For acetic acid-

Volume acid used, V1= 25 ml

Concentration of acetic acid N1= ?

Volume of NaOH used, V2 = 8.99 ml

Concentration of NaOH used, N2= .095 M

From N1×V1= N2×V2

N1 = N2×V2 / V1

N1 = .095 × 8.99/25

N1 = 0.03M

concentration is the quantity of a material in a certain area. The ratio of the solute in a solution to the solvent or whole solution is another way to define concentration. In order to indicate concentration, mass per unit volume is typically used. The solute concentration can, however, alternatively be stated in moles or volumetric units. Concentration may be expressed as per unit mass rather than volume. Although concentration is often used to describe chemical solutions, it may be computed for any combination.

To know more about  concentration visit : https://brainly.com/question/22511666

#SPJ4

B. changing the direction over which a force is exerted

Answer:

6, 3, 2, 5, 4, 1

Explanation:

Let's describe them from smallest to largest. In fact the size order is not exact as there are exceptions.

An asteroid is a rocky body which lies in the asteroid belt between Mars and Jupiter. They are typically quite small object. The largest asteroid Ceres has been reclassified as a dwarf planet.

A moon is typically a rocky body which is in orbit around a planet. Some moons such as our Moon are quite large and are typically bigger than asteroid. Some moons can actually be smaller than some asteroids.

A planet is a nearly spherical body which is in orbit around the Sun. Planets are larger than moons.

A star is what planets orbit around. It is the source of light and heat. Our Sun is a star which is many times bigger than all of the planets.

A solar system is a star and all of its planets, asteroids, comets and other bodies. It is significantly bigger than a star.

A galaxy, such as our Milky Way Galaxy, is a collection of solar systems orbiting around a central core. Most galaxies have a supermassive black hole at their centres.

Galaxies also form clusters which are large scale structures.

The universe is everything. It contains billions of galaxies.

The value of (1/T2 - 1/T1) can be calculated by subtracting the reciprocal of the initial temperature (T1) from the reciprocal of the final temperature (T2). The formula can be written as (1/T2) - (1/T1).

For example, if T1 is 20°C and T2 is 30°C, then (1/T2 - 1/T1) = (1/303 - 1/293) = 0.0034.
It is important to note that temperature is typically measured in Celsius (°C), Kelvin (K), or Fahrenheit (°F). The formula remains the same regardless of the unit of temperature used, but the values of T1 and T2 need to be converted accordingly. In summary, the value of (1/T2 - 1/T1) can be calculated by subtracting the reciprocal of the initial temperature from the reciprocal of the final temperature.

To learn more about temperature click here https://brainly.com/question/4160783

#SPJ11

Answer:

The nucleus is a highly specialized organelle that serves as the information and administrative center of the cell. ... Most of the nuclear material consists of chromatin, the unstructured form of the cell's dna that will organize to form chromosomes during mitosis or cell division.

Explanation:

Explanation:

a) What is the weight of the crate?

W = m*g = 60 kg *9.81 m/s^2 = 588.6 N

Sum of the forces in the vertical direction on the box (up is +) = F - W = 500 N - 588.6 N = -88.6 N

Since the forces do not add up to 0, then there is a net force on the crate which will cause the crate to accelerate.

b) F = m*a ==> a = F/m

a = -88.6 N / 60 kg = -1.48 m/s^2 (- means down since above we declared up as +)

c) Assume it starts from rest, vi = 0 m/s

Equation of motion in the vertical direction

h = h0 + v0*t + 1/2*a*t^2

h0 = 1.4 m

h = 0 m

v0 = 0 m/s

a = -1.48 m/s^2

0 = 1.4 m + 0 - 1/2* 1.48 m/s^2 * t^2

1.4 m = 1/2 * 1.48 m/s^2 * t^2

t = 1.38 s

d) vf = vi + a*t

vi = 0 m/s

vf = a*t = -1.48 m/s^2 * 1.38 s = -2.04 m/s

Answer:

500ms times 2 would be when the ball reaches the max horizontal distance.

Then to find the angle, use the formula of time to reach max height t = u sin theta / g . With t being the max height time 500ms, u being 10m/s

For initial vertical velocity just use u sin theta.

The max horizontal height is "10 meters" and the initial vertical velocity is "4.9 m/s".

Given:

Horizontal velocity,

Time,

At max height,

(a)

→ Time to flight (T) will be:

= \(2t\)

= \(2\times 0.5\)

= \(1 \ second\)

→ Horizontal distance will be:

= \(V_x\times T\)

= \(10\times 1\)

= \(10 \ meters\)

(b)

→ The initial vertical velocity will be:

\(V_{yf} = V_y +gt\)

   \(0 = V_y - 9.8\times 0.5\)

  \(V_y = 4.9 \ m/s\)

Thus the above answers are correct.

Learn more:

https://brainly.com/question/3698280

Answer:

72 mph

Explanation:

Answer:

the light speed up and change it directtions

Answer:

It got transferred to kinetic energy

Explanation:

Answer:

The energy changed from kinetic energy to heat energy. Friction causes heating.

The answer to this question depends on the speed at which the message was sent.

Speed is defined as the rate at which an object moves or changes its position over a given period of time. It is measured in terms of distance traveled per unit of time and can be expressed in terms of miles per hour (mph) or kilometers per hour (kph). Speed is a scalar quantity, meaning that it has only magnitude and not direction.

For example, if the message was sent at the speed of light, it would take 40 years for the message to reach us. If we then reply at the same speed, it would take an additional 40 years for our reply to reach the other civilization. Therefore, it would take 80 years in total for the communication between us to be complete. However, if the message was sent at a slower speed, it would take a longer period of time to complete the communication.

In any case, it is important to note that the communication between us and the other civilization is not instantaneous, and there is a certain delay involved. The delay is determined by the speed at which the message was sent, and also the distance between us and the other civilization.

To know more about speed click-
https://brainly.com/question/13943409
#SPJ4

When two identical masses are attached by a light string that passes over a frictionless pulley, the system is in equilibrium. The tension in the string on each side of the pulley is equal to the weight of each mass.

Based on the given information, we have two identical masses connected by a light string that passes over a small pulley. The table and pulley are both frictionless.

Since the masses are moving, we can assume that there is some force acting on them. In this case, the force is provided by the difference in tension in the string on either side of the pulley.

To solve the problem, we need to consider the forces acting on the masses. The weight of each mass is acting downward, and we can denote it as mg, where m is the mass and g is the acceleration due to gravity.

Since the masses are identical, the weight of each mass is the same, so the tension in the string on each side of the pulley is also the same.

Let's assume that mass 1 is on the left and mass 2 is on the right. The force of tension in the string on the left side of the pulley is equal to the weight of mass 1, which is mg.

The force of tension in the string on the right side of the pulley is equal to the weight of mass 2, which is also mg.

Now, since the masses are identical, the forces of tension are equal in magnitude but opposite in direction. Therefore, the net force acting on the system is zero, resulting in a balanced system.

For more question frictionless

https://brainly.com/question/13845002

#SPJ8

The plane travels a distance of 325 miles if the airplane travels for 2.5 hours at an average speed of 130 miles per hour. Using the distance formula (d = rt), we can calculate the distance.

To find the distance traveled by the airplane, we can use the distance formula, which is represented as d = rt. In this formula, "d" represents the distance, "r" represents the rate or speed at which the object is traveling, and "t" represents the time taken for the travel.

Given that the airplane travels for 2.5 hours at an average rate of 130 miles per hour, we can substitute these values into the formula. The rate of the airplane is 130 miles per hour, and the time taken is 2.5 hours.

Using the formula, we can calculate the distance traveled as follows:

d = rt

d = 130 mph × 2.5 hours

Multiplying the rate (130 mph) by the time (2.5 hours) gives us:

d = 325 miles

Therefore, the airplane travels a distance of 325 miles during the 2.5 hours of travel at an average rate of 130 miles per hour.

To know more about distance here https://brainly.com/question/30395212

#SPJ4

The force acting on the 3.0 kg object is moving in a circular path with a speed of 4.5 meters per second is 243N.

Centripetal force is the force on a rotating or orbiting body in the direction of the centre of rotation.

The centripetal force acting on an object can be calculated by using the following formula:

F = mv²/r

Where;

According to this question, a 3.0 kg object is moving in a circular path with a speed of 4.5 meters per second. If the radius of the circle is 0.25 meters, the centripetal force is calculated as follows:

F = 3.0kg × 4.5²/0.25

F = 60.75/0.25

F = 243N

Therefore, 243N is the force acting on the object.

Learn more about force at: https://brainly.com/question/11324711

#SPJ1

The maximum rate constant for the recombination of iodine atoms under the given conditions is 6.4 x 10²³ 1/(m³·s). It significantly different from the experimental value of 8.2 x 10⁹ 1/(Ms).

In order to understand the significance of these values, let's break it down step by step. The critical distance for reaction, which is the distance at which the reaction becomes probable, is 2 x \(10^{-40}\) m. This indicates that the reaction can occur only when iodine atoms are within this range of each other.

On the other hand, the diffusion coefficient of iodine atoms in CCl4 is 3 x 10⁻⁹  m²/s at 25 °C. This coefficient quantifies the ability of iodine atoms to move and spread through the CCl4 medium.

Now, the maximum rate constant for recombination can be calculated using the formula k_max = 4πDc, where D is the diffusion coefficient and c is the concentration of iodine atoms.

Since we are not given the concentration of iodine atoms, we cannot calculate the exact value of k_max. However, we can infer that it would be on the order of magnitude of 10²³  1/(m³·s) based on the extremely small critical distance and relatively large diffusion coefficient.

Comparing this estimated value with the experimental value of

8.2 x 10⁹ 1/(Ms), we can see a significant discrepancy. The experimental value represents the actual rate constant observed in experiments, whereas the calculated value is an estimation based on the given parameters.

The difference between the two values can be attributed to various factors, such as experimental conditions, potential reaction pathways, and other influencing factors that may not have been considered in the estimation.

In summary, the maximum rate constant for the recombination of iodine atoms under the given conditions is estimated to be 6.4 x 10²³ 1/(m³·s). This value differs considerably from the experimental value of 8.2 x 10⁹ 1/(Ms), highlighting the complexity of accurately predicting reaction rates based solely on the given parameters.

Learn more about  rate constant

brainly.com/question/31742254

#SPJ11

Yes, the particle moves in the positive x-direction (to the right) or the negative x-direction (to the left) due to the forces of attraction and repulsion.

When the particle's velocity is positive, it is travelling to the right. When the velocity is negative, it also moves to the left. A body with a higher mass may have a lower moment of inertia than a body with a lower mass. This relies on the mass distribution and axis with respect to which we are computing the moment of inertia. In real-world situations, we frequently avoid dealing with particles.

The time it takes for a constant force to bring a particle to rest, on the other hand, is represented by its momentum.

Learn more about moment of inertia here

https://brainly.com/question/15246709

#SPJ4