PHYSICS MIDDLE SCHOOL

At 25°C, the screech of the Sneetches can travel 250 meters across the plains of Sneedville in 0.50 seconds. Determine the velocity of these sound waves as they travel across the plains. show your work

Answers

Answer 1
Answer:

Answer:

The velocity of the sound waves across the plains of Sneedville is 500 m/s.

Step-by-Step Explanation:

Distance travel by the screech of Sneetches = d = 250 m

Time taken to cove 250 meters = t = 0.50 s

Let the velocity of the sound waves be v, such that:

v = d/t

⇒ v = 250/0.5

⇒ v = 500 m/s

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Do you think that the universe has a starting point and ending point? explain.

Answers

Answer:

No

Explanation:

I don't think the universe has a starting and ending point because the universe is vast and has not been fully discovered. I think that the universe is endless because all of the stars, planets, and galaxy's have yet to be found and the end or start of the universe is also yet to be discovered so I think that the universe could go on forever.

Final answer:

The universe's starting point is believed to be the Big Bang about 13.8 billion years ago, but whether it has an ending point is still unknown.

Explanation:

The question of whether the universe has a starting point and ending point is a topic explored in the field of physics. According to the Big Bang theory, the universe began with a singularity approximately 13.8 billion years ago. However, it is currently unknown whether the universe will have an ending point.

One theory suggests that the universe will continue expanding forever, gradually growing colder and darker. Another theory proposes the possibility of a Big Crunch, where the universe would eventually collapse in on itself. Some scientists also speculate about the possibility of a cyclical universe, where the cycle of expansion and contraction repeats indefinitely.

It's important to note that these theories are still being studied and researched, and our understanding of the universe's origins and potential ending is continually evolving.

Learn more about The universe's starting point and ending point here:

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What TWO things affect the gravitational force acting on an object?

Answers

The strength of the gravitational forces between two masses depends on

--  the product of the masses,

-- the distance between their centers of mass.
mass and distance (between two objects) are those TWO things that affect the gravitational force acting on an object

what does it mean for data to be reproducible? how would you conduct an experiment in such a way as to get data reproducible?

Answers

Answer:

Explanation:

If there are n number of groups in an activity and the data produced among them is copied or is same then it is termed as reproducible.

To have an experiment that gives a reproducible data there are few key points which we need to keep in mind.

1- The circumstances provided for every group should be same.

2- Each group must be selected in such a way that participants must have same set of thought processing and mind set toward the situation.
Reproducible is the term where your answers are similar to other groups. If every other group has similar results as yours (only if you use the same measurements) your results are reproducible. If your results are different to every other group your results aren't reproducible.  

A book has a mass of 50 grams and an acceleration of 5 m/s/s. What is the force on the book?

Answers

Answer:

250 newtons i belive.

Explanation:

Answer:220

Explanation:has more mass

1.    How does the friction affect forwardmotion? Give an example.
 2.    Describe two ways to change the
frictional force between two solids surfaces.

Change the lubrication between the two surfaces

Change the normal force between the two surfaces


3.    How does air resistance affect the
velocity of a falling object?
 4.    What two sources of friction do you
have to overcome when you are walking?
 5.    If you push a chair across the floor
at a constant velocity, how does the force of friction compare with the force
exert? Explain.


6.    If you push a book against a wall
hard enough, it will not slide down even though gravity is pulling it. Use what
you know about Newton’s laws of motion to explain why the book doesn’t fall.

Answers

1.       Friction affects forward motion by repelling or trying to cancel the force which the opposite of its direction. For example, the wheel against the road pavement.

3. Air resistance affect the velocity of a falling object by either interfering with the gravitation force the object is acting on the subject. Hence, these since air assuming that the direction is perpendicular with gravity will result the object to drop sideways or gradually.  

4. The friction of the pavement and the air molecules.

5. Since the exerted force of the human is greater the object moves until the frictional force cancel itself or produce a net force both the force of the chair, gravity and friction.

6. Third law of motion which states that the force exerted of A to B, B will exert the same force that was exerted by A leaving the gravitational force canceled.



Which are the four fundamental forces? the electromagnetic force, the strong nuclear force, the frictional force, and the gravitational force. the electromagnetic force, the strong force, the weak force, and the gravitational force the electromagnetic force, the normal force, the frictional force, and the gravitational force. the electromagnetic force, the strong nuclear force, the weak nuclear force, and the frictional force.

Answers

Answer:

Gravitational Force – Weakest force; but infinite range.

Weak Nuclear Force – Next weakest; but short range.

Electromagnetic Force – Stronger, with infinite range.

Strong Nuclear Force – Strongest; but short range.

Explanation:

  • Gravitational Force  is a weak force, but very long ranged. It is always attractive in mature. It acts between any two pieces of matter in the Universe since mass is its source.
  • Weak Nuclear Force is responsible for radioactive decay and neutrino interactions. It has a very short range and as its name indicates, it is very weak in nature. The weak force causes Beta decay i.e. the conversion of a neutron into a proton, an electron and an anti-neutrino.
  • Electromagnetic Force  causes electric and magnetic effects such as the repulsion between like electrical charges or the interaction of bar magnets in a similar fashion of attraction & repulsion. It is long-ranged, but much weaker than the strong force. It can be attractive or repulsive and acts only between pieces of matter carrying electrical charge. Electricity, magnetism, and light are all produced by this force.
  • Strong Nuclear Force is very short-ranged. It is responsible for holding the nuclei of atoms together. It is basically attractive, but can be effectively repulsive in some circumstances. The strong force is ‘carried’ by particles called gluons; i.e., when two particles interact through the strong force, they do so by exchanging gluons. Thus, the quarks inside of the protons and neutrons are bound together by the exchange of the strong nuclear force.

A gluon is an elementary particle that acts as the exchange particle (or gauge boson) for the strong force between quarks. It is analogous to the exchange of photons in the electromagnetic force between two charged particles.

Quark  is a type of elementary particle and a fundamental constituent of matter.

Answer: You've provided a step-by-step guide for calculating the uncertainty in the volume of a building block due to uncertainties in its dimensions of force.

Explanation:

Pressure in each region is determined by the force applied divided by the surface area. In the case of a fluid in a container, the expression for pressure is given by:

1. Inside the Region: Pressure (P) inside the region can be calculated using the formula: P = F/A, where F is the force applied to the fluid and A is the surface area of the region.

2. Outside the Region: Pressure outside the region can be assumed to be zero if we disregard gravitational effects.

This provides a basic understanding of how to express pressure in each region of the container.

Learn more about force.

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