PHYSICS HIGH SCHOOL

How far can a bus travel in 8 h at an average speed of 60 mph?

Answers

Answer 1
Answer:

Answer:

480 mph

Explanation:

speed = 60 mph

time = 8 hours

distance = speed*time

             = 60*8

             = 480 mph

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The alpha particles leave visible tracks in the cloud chamber becauseIonization by the alpha particle seeds the formation of clouds where the particle has passed.
The kinetic energy of the alpha particles heats the air.
The alpha particle is so energetic that it leaves a smoke trail behind.
The alpha particle strikes nitrogen molecules and breaks them into atomic nitrogen.

Answers

Answer: Ionization  by the alpha particle seeds the formation of clouds where the particle has passed.

The inner atmosphere of a cloud chamber is composed of an easily ionizable gas, this means that little energy is required to extract an electron from an atom. This gas is maintained in the supercooling state, so that a minimum disturbance is enough to condense it in the same way as the water is frozen.  

Then, when a charged particle with enough energy interacts with this gas, it ionizes it.  

This is how alpha particles are able to ionize some atoms of the gas contained inside the chamber when they cross the cloud chamber.

These ionized atoms increase the surface tension of the gas around it allowing it to immediately congregate and condense, making it easily distinguishable inside the chamber like a small cloud. In this way, it is perfectly observable the path the individual particles have traveled, simply by observing the cloud traces left in the condensed gas.  

Trumpeter A holds a B-flat note on the trumpet for a long time. Person C is running towards the trumpeter at a constant velocity. Person B is running away from the trumpeter at the same rate. Person D is standing still the whole time.Which person hears a frequency that is lower than the B-flat?
A) Person A
B) Person B
C) Person C
D) Person D

Answers


The person running towards the trumpet, Mr. C,
hears a higher frequency.

The person running away from the trumpet, Mrs. B,
hears a lower frequency.

The trumpeter, Mr. A, and the person who is just standing still
and listening, Miss D, both hears the beautiful perfect B-flat.

Answer:B

Explanation:Making fast and simple :)

If the mass of Earth were increased by a factor of 2.00 , by how many times would the force between Earth and the Sun increase?

Answers

Answer:

If the mass of Earth were increased by a factor of 2.00, the force between Earth and the Sun would increase by a factor of 2.00 as well.

Explanation:

The gravitational force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. The formula for gravitational force (F) is given by:

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

Where:

F = gravitational force

G = gravitational constant (a constant value)

m1 = mass of the first object

m2 = mass of the second object

r = distance between the centers of the two objects

If the mass of Earth is increased by a factor of 2.00 (meaning it becomes 2 times its original mass), we can denote the original mass of Earth as "M" and the increased mass as "2M."

Now, let's calculate how the force between Earth and the Sun changes:

Original force (F1) = (G * M * Msun) / r^2

New force (F2) = (G * 2M * Msun) / r^2

Now, we can find the ratio of the new force to the original force:

F2 / F1 = [(G * 2M * Msun) / r^2] / [(G * M * Msun) / r^2]

Notice that the gravitational constant (G), distance (r), and the mass of the Sun (Msun) are the same in both equations and cancel out when calculating the ratio. Therefore, you're left with:

F2 / F1 = (2M) / M = 2

So, if the mass of Earth were increased by a factor of 2.00, the force between Earth and the Sun would increase by a factor of 2.00 as well.

The Hubble telescope’s orbit is 5.6 × 105 meters above Earth’s surface. The telescope has a mass of 1.1 × 104 kilograms. Earth exerts a gravitational force of 9.1 × 104 newtons on the telescope. The magnitude of Earth’s gravitational field strength at this location is

Answers


Gravitational force = 9.1 x 10⁴ newtons

Mass  =  1.1 x 10⁴ kilograms

Gravitational field strength =  9.1 x 10⁴ newtons / 1.1 x 10⁴ kilograms

                                      =  ( 9.1 / 1.1)  (newton / kilogram)

                                       =   8.3 newton/kg

                                       or  8.3 m/s² .

List five factors that may affect the rate of a chemical reaction

Answers

1) temperature 
2) pressure
3) concentration
4) surface area
5) the presence of  a catalyst 

A piece of a newly synthesized material of mass 25.0 g at 80.0◦C is placed in a calorimeter containing 100.0 g of water at 20.0◦C. If the final temperature of the system is 24.0◦C, what is the specific heat capacity of this new material? 1. 1.20 J/g ◦C 2. 7.46 J/g ◦C 3. 4.76 J/g ◦C 4. 0.30 J/g ◦C 5. 0.84 J/g ◦C

Answers

Answer:

1.Cp₁ = 1.2 J/g.⁰C

Explanation:

For new material:

m₁  = 25 g

T₁ = 80⁰C

specific heat of water = Cp₁

For water :

m₂ = 100 g

T₂ = 20⁰C

The final temperature T=24⁰C

We know that specific heat of water Cp₂ = 4.187 kJ/kg.K

The heat lost new material = Heat gain by Water

m₁ Cp₁ ( T₁ - T ) = m₂ Cp₂ (T- T₂)

25 x Cp₁ (80- 24 ) = 100 x 4.817 (24 - 20 )

Cp₁  x 56 = 4 x 4.187 x 4

C_(p1)=(4* 4.187* 4)/(56)\ kJ/kg.K

Cp₁ = 1.19 kJ/kg.K

Cp₁ = 1.2 J/g.⁰C
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