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Answer:

Stellar Spectra Classification The patterns of lines detected in stellar spectra are used by astronomers to classify stars into spectral classes. These spectral classes are a measure of a star's surface temperature since the temperature of a star dictates which absorption lines are present in its spectrum.

Explanation:

Explanation:

option D ) is correct the speaker explain a difficult decision he had to make

hi everyone comment

Answer:

45 m

Explanation:

Use the equations of motion.

We know that:

S= the unknown

U=3 m/s

V=12 m/s

A=1.5 m/s

T= we won't need it

The equation used: [tex]v^2=u^2+2as[/tex]

Subsitute the values: [tex]12^2=3^2+2*1.5*s\\[/tex]

Solve the equation:

[tex]144=9+3s[/tex]

[tex]135=3s[/tex]

[tex]s=45 m[/tex]

Answer: The velocity with which the sand throw is 24.2 m/s.

Explanation:

Explanation:

acceleration due to gravity, a =  3.9 m/s2

height, h = 75 m

final velocity, v = 0

Let the initial  velocity at the time of throw is u.

Use third equation of motion

The velocity with which the sand throw is 24.2 m/s.

Answer:

~186

Explanation:

1) R= (V^2 × sin A ) /g

V=90 m/a

A= 13°

g= 9.8 or 10 (I will take 9.8 for right result)

R= (90^2 × sin 13) / 9.8 = 185.928932672 ~ 186

Answer:

To summarize, potential energy is the energy that is stored in an object due to its position relative to some zero position.

Explanation:

An object possesses gravitational potential energy if it is positioned at a height above (or below) the zero height.

Answer:

transverse waves are always characterized by particle motion being perpendicular to wave motion. a longitutal wave is a wave in chich particles of the medium move pin a direction parallel to the direction that the wave moves

In contrast, the displacement of particles in the transverse wave is perpendicular to the direction the wave is travelling.

...

Difference between Longitudinal and Transverse Wave.

Parameter Longitudinal wave Transverse wave

Example An example of a longitudinal wave is the earthquake P wave An example of a transverse wave is the earthquake S wave

The force of static friction acting on  the box is greater than the applied horizontal force.

Force is known to be the reason for motion according to Newton's first law of motion. An object will move when it has been acted upon by an external force.

In this case, a box lying on a table has been acted upon by an external force of  12 newton but the box remains at rest. This simply means that the applied force is less than the force of static friction acting on  the box.

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Golf cart is moving 8 metre in 1 second

so, in 10 seconds it moves 8 × 10 = 80 m

a) velocity = 80/10 = 8 m/s

b) acceleration = v - u / t

= 8 - 0 / 10

= 0.8 m/s²

c) the displacement of the graph is increasing

I hope this answer is correct and helpful to you

Answer:

The units of frequency are hertz. As 1 hertz is equal to one cycle per second.

Amplitude is the maximum displacement of the waves or the distance from rest to crest and is measured in meters or centimeters or millimeters.

Answer:

B, C, and D

Explanation:

Answer:

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Steel-reinforced concrete is a better material for foundation where movement in the ground is envisaged.

The kind of material used for the foundation of a building greatly impacts the ability of that building to cope with movements in the ground such as during earthquakes.

For instance, when the foundation is made of brick or concrete which has a low ductility, these materials are incapable of absorbing a lot of energy. However, steel-reinforced concrete is a better material for foundation where movement in the ground is envisaged.

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Answer:

Smaller forces are easier on your legs and you prefer to land on soft grass. Momentum/impulse explanation: Whether you land on concrete or soft grass, your change in momentum will be identical. A hard surface that brings you to a stop in 0.01 s requires a much larger force of 15,000 N.

Explanation:

Answer:

Washign machine and swingset

Explanation:

Answer:

what are you trying to do for this question

Explanation:

Answer:

c

Explanation:

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Answer:

Force and Motion - Word ACROBAT w otion" Applied Force O Newtons DD -500 500 Net Force Motion Friction Acceleration I

2. Select the checkboxes: Forces, Values, Masses and Speed Force Values Masses Speed 3. Push the skateboard and the box with a force of 500N. Observe and describ behavior of the velocity once the skateboard is released Explain the reason of such behavior Part III. Friction 1. Click on "Friction" 2. Select the checkboxes: Forces, Sum of Forces, Values, Masses and Speed. Kee the knob that regulates the friction at the center of the scale. Forces Sum of Forces Values Masses

3. Start to push the box, increasing the force applied on the box slowly. There is a force that is opposite to the force you are applying. What is the name of the force opposing to the motion? 4. Once the box start moving, the magnitude of the resultant force increase instantaneously. How do you explain that? 5. Push the box and find the force needed to make the box to start moving. Add more mass (box, kid, man,refrigerator, basket as needed) and repeat the procedure such that you complete the table below. Hint: Weight = mass x gravity Magnitude of Normal Force = Magnitude of the Weight Mass (kg) Weight (N) Normal Force (N) Force of Static Friction (N) 50 90 130 150 180 x 0 N

Explanation:

The forces act on skateboard when we push it are , external force of 500N and friction force because of the surface.

The stationary object will remain stationary or the subject in the motion will keep its motion until or unless the external force is not applied .

So, by the Newton's first law of motion we can understand this concept.

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Answer:

i think the products have four hydrogen atoms and two oxygen atoms and the reactants have the same atoms in two molecules of h2o

Answer:

d) All of the above

Answer:

d

Explanation:

cause mass is in everything

Answer:

0.1962N.

Explanation:

Weight is a force, so we use newtons second law which states F=ma. So the weight of a watermelon on earth is 2kg x 9.81m/s², which is 19.62N (newtons). On the moon it weighs 2 x 1.63 which is 3.26N.

The weight of the pen is 0.02 x 9.81, which is 0.1962N. If the pen is not to fall the frictional force needs to be equal to this force,

so the answer is 0.1962N.

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Answer:

They can help us in our daily lives

Explanation:

I knew that they can also be a help to others specially in other ways such as to help us to facilitate our work in home

Answer:

53.8

Explanation: I plugged it on the formula

Coyote should drop the anvil when the Roadrunner is 20.3 meters away from the cliff.

The velocity of the object is defined as the fraction of the displacement of the object over a period of time.

We can solve this problem by finding the time it takes for the anvil to fall from the cliff to the ground, and then using that time to find how far the Roadrunner has travelled during that time.

First, we need to find the time it takes for the anvil to fall from the cliff. We can use the equation:

d = 1/2 x  g  x t²

where d is the distance (40.0 meters), g is the acceleration due to gravity (9.81 m/s^2), and t is the time.

Solving for t, we get:

t = √(2d/g)

t = √(2 x 40.0/9.81)

t = 2.03 seconds

So it takes 2.03 seconds for the anvil to fall from the cliff to the ground.

During this time, the Roadrunner has travelled a distance equal to its velocity multiplied by the time:

distance = velocity x  time

distance = 10.0 m/s x 2.03 s

distance = 20.3 meters

Therefore, Wile E. Coyote should drop the anvil when the Roadrunner is 20.3 meters away from the cliff.

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Answer:

Force arrows are used to represent both the magnitude and direction of forces. The length of the arrow corresponds to the magnitude of the force, with longer arrows indicating forces with larger magnitudes. The direction of the arrow corresponds to the actual direction that the force is being exerted. Force arrows are used by scientists and engineers to predict the motion of an object based on the forces that are applied to it.

Let's go back to Amil and his box for a moment. To represent the force that he is exerting on the box, we can draw the box and then show the force using a force arrow, like this:

Explanation:

How would our force arrow change if he pushed the box with twice as much force? Because the magnitude of the force is doubled, the length of the force arrow should also be doubled.

Now, what if he didn't push directly to the right, but instead his arms made a 30-degree angle with the ground? In that case, the direction of the force arrow needs to change to show the direction in which the force is applied.

Answer:

There is three laws of motion by newton

Explanation:

Answer:

it is hydrogen peroxide

Answer:

5 years[tex][/tex]