PHYSICS HIGH SCHOOL

An oscillator makes 360 vibrations in 3 minutes.a. How many vibrations does it make in two minutes?
b. How many vibrations does it make in five seconds?
c. What is its period in seconds?
d. What is its frequency in hertz?

Answers

Answer 1
Answer: A- 240
B- 10
C- 2
D- ?

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An electron that has an instantaneous velocity of ???? = 2.0 × 106 m ???? ???? + 3.0 × 106 m ???? ???? is moving through the uniform magnetic field ???? = 0.030T ???? − 0.15T ???? . (a) Find the force on the electron due to the magnetic field (b) Repeat your calculation for a proton having the same velocity.

Answers

Explanation:

It is given that,

Velocity of the electron, v=(2* 10^6i+3* 10^6j)\ m/s

Magnetic field, B=(0.030i-0.15j)\ T

Charge of electron, q_e=-1.6* 10^(-19)\ C

(a) Let F_e is the force on the electron due to the magnetic field. The magnetic force acting on it is given by :

F_e=q_e(v* B)

F_e=1.6* 10^(-19)* [(2* 10^6i+3* 10^6j)* (0.030i-0.15j)]

F_e=-1.6* 10^(-19)* (-390000)(k)

F_e=6.24* 10^(-14)k\ N

(b) The charge of electron, q_p=1.6* 10^(-19)\ C

The force acting on the proton is same as force on electron but in opposite direction i.e (-k). Hence, this is the required solution.

The resultant resistance of two resistance wires in series combination is 108 ohm and in parallel combination is 24 ohm. find the value of individual resistance.

Answers

Call the two resistors 'x' and 'y'.

In series, the resultant resistance is their sum: x + y = 108
Notice that y = 108 - x.  I think we'll use that very soon.

In parallel, the resultant resistance is (their product) / (their sum) = xy/108 = 24

Multiply each side by 108:

xy = 2,592

Substitute for 'y' :

x(108 - x) = 2,592

108x - x² = 2,592

-x² + 108x - 2,592 = 0

x² - 108x + 2,592 = 0

Use the quadratic formula to find:

x = 72 . . . then y = 108 - 72 = 36
or
x = 36 . . . then y = 108 - 36 = 72

The individual resistors are 36Ω  and  72Ω .


If chris throws a baseball 60 meters in 4 seconds, what is the average speed of the football?

Answers

The average speed of the football is 15 meters per second. Just divide both of the numbers by 4 :)

_______ discovered that there were other galaxies besides the Milky Way.A. Albert Einstein
B. Edwin Hubble
C. Galilei Galileo
D. Sir Isaac Newton

Answers

   Edwin Hubble discovered that there were other galaxies besides the milky way. 

Edwin Hubble discovered there were other galaxies besides the Milky Way.

What are electron orbitals

Answers

Answer:

Electron orbitals are energy levels or shells that an electron inhabits in an atom or a molecule. The number of orbitals in an atom depends on the number of protons in its nucleus. The electrons fill the orbitals from lowest to highest energy. The arrangement of electrons in the orbitals determines the behavior and properties of the atoms and molecules.

What would be the result of an alpha particle coming into a magnetic field?A) The alpha particle will stop moving.
B) The alpha particle will reverse its direction.
C) The alpha particle will be deflected in a curve path.
Eliminate
D) The alpha particle will continue to travel in a straight line.

Answers

Answer:

C. The alpha particle will be deflected in a curve path.

Alpha particles are nuclei of helium and consist of two neutrons and two protons. So, they are positively charged.

Then the alpha particle will be deflected by a magnetic field.
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