Who expressed particles by wave equations?

(I) A 0.145-kg baseball pitched at 31.0 m/s is hit on a horizontal line drive straight back at the pitcher at 46.0 m/s. If the c

tangare [24]

Answer:

The force between the ball and the bat = 2233 N

Explanation:

Force: This can be defined as the product of force and its acceleration.

The S.I unit of Force is Newton (N)

F = ma .............................. Equation 1

Where F = Force , m = mass of the ball, a = acceleration of the ball.

where

a = (v-u)/t..................... Equation 2

Where v = final velocity of the ball, u = initial velocity of the ball, t = time of contact between the ball an the bat.

Given: v = 46 m/s u = - 31 m/s (it hit an horizontal line drive back at the pitcher), t = 5×10⁻³ s

Substituting these values into equation 2,

a = [46-(31)]/(5×10⁻³ )

a = 77×10³/5

a = 15.4×10³ m/s².

Also given m = 0.145 kg

Substituting into equation 1,

F = 0.145(15.4×10³ )

F = 2233 N

Thus the force between the ball and the bat = 2233 N

8 0

3 years ago

Two spherical objects are separated by a distance of 2.59 × 10-3 m. The objects are initially electrically neutral and are very

kodGreya [7K]

Answer:

Number of electrons, n = 12 electron

Explanation:

Given that,

The distance between charged spheres, $d=2.59\times 10^{-3}\ m$

The object experiences an electrostatic force that has a magnitude of, $F=4.94\times 10^{-21}\ N$

The electric force between spheres is given by :

$F=\dfrac{kq^2}{d^2}$

$q=\sqrt{\dfrac{Fd^2}{k}}$

$q=\sqrt{\dfrac{4.94\times 10^{-21}\times (2.59\times 10^{-3})^2}{9\times 10^9}}$

$q=1.91\times 10^{-18}\ C$

Let there are n number of electrons. Using quantization of electric charge we get :

$q=ne$

$n=\dfrac{q}{e}$

$n=\dfrac{1.91\times 10^{-18}}{1.6\times 10^{-19}}$

n = 11.93 electrons

or

n = 12 electrons

Hence, 12 electrons produce the charge on one of the objects.

4 0

3 years ago

______ can occur when water-saturated soil turns from a solid to a liquid as a result of an earthquake.

jek_recluse [69]

The answer is liquefaction

6 0

3 years ago

What is imagery?

Angelina_Jolie [31]

Imagery is almost like a film being played in the readers mind when reading literature. So on that note, I think the last one, 'words that trigger the imagination to remember by appealing to the five senses', is the best choice.

I hope this helps!

8 0

3 years ago

Read 2 more answers

Choose the scenario under which each of the given Doppler shift effects will be seen.a. The source and observer are approaching

kkurt [141]

Answer:

scenario A and B

Explanation:

The Doppler effect is the change in frequency of a wave by the relative movement of the source and the observer. It is described by the expression

f ’= (v + v₀) / (v - $v_{s}$ ) f₀

Where f₀ is the emitted frequency, v the speed of the wave, v₀ and $v_{s}$ the speed of the observer and the source, respectively, the signs are for when they are approaching and in the case of being away the signs are changed.

Consequently, from the above for the Doppler effect to exist there must be a relative movement of the source and the observer.

Let's examine the scenarios

A) True. You agree with the equation shown

B) True. Only the signs should be changed and it is described by the equation shown

C) False. If there is no relative movement there is no Doppler effect

8 0

3 years ago