Is c20h12 organic or not organic

In a ballistic pendulum, a spring pushes a ball from rest It ies through the air and sticks in the base of a pendlum that swings

Marysya12 [62]

Answer:

The final velocity is $\bf{562.9}$ .

Explanation:

Given:

The maximum angle that the pendulum and the ball system can travel, $\theta_{m} = 45^{0}$ .

The length of the pendulum, $l = 30~cm$ .

The mass of the pendulum, $m_{p} = 250~g$ .

The mass of the ball, $m_{b} = 76~g$ .

Consider that the initial velocity of the ball-pendulum system is $v_{i}$ . So the initial total energy of the system is given by

$E_{i} = K.E. + P.E.\\~~~~= \dfrac{1}{2}(m_{b} + m_{s})v_{i}^{2} + 0\\~~~~= \dfrac{1}{2}(m_{b} + m_{s})v_{i}^{2}$

Consider the final velocity of the ball is $v_{0}$ and the final height attended by the system is $h$ . So the final total final energy of the system is given by

$E_{f} = K.E. + P.E.\\~~~~~= 0 + (m_{b} + m_{s})gh\\~~~~~= (m_{b} + m_{s})gh$

From the conservation of energy,

$E_{i} = E_{f}\\&or,& \dfrac{1}{2}(m_{b} + m_{s})v_{i}^{2} = (m_{b} + m_{s})gh\\&or,& v_{i} = \sqrt{2gh}$

From the conservation of momentum,

$&& m_{b}v_{0} = (m_{b} + m_{s})v_{i}\\&or,& v_{0} = (1 + \dfrac{m_{p}}{m_{b}})\sqrt{2gh}$

The final height attended by the system is given by

$h = l(1 - \cos 45^{0}) = 8.787~cm$

The final velocity is given by

$v_{0} = (1 + \dfrac{250}{76}})\sqrt{2(980)(8.787)}\\~~~~= 562.9$

7 0

4 years ago

An evacuated tube uses an accelerating voltage of 40 kV to accelerate electrons to hit a copper plate and produce x rays. Nonrel

lozanna [386]

Answer:

1.187 x 10^8 m/s

Explanation:

the potential of the electric field V = 40 kV = 40000 V

the charge on an electron e = 1.6 x 10^-19 C

The energy of an accelerated electron in an electric field is given as

E = eV

E = 1.6 x 10^-19 x 40000 = 6.4 x 10^-15 J

This energy is equal to the kinetic energy with which the electron moves, according to the conservation of energy.

The kinetic energy = $\frac{1}{2}mv^{2}$

where

m is the mass of the electron = 9.109 x 10^-31

v is the speed of the electron.

Equating the energy, we have

6.4 x 10^-15 = $\frac{1}{2}*9.109*10^-31*v^{2}$

6.4 x 10^-15 = 4.55 x 10^-31 $v^{2}$

$v^{2}$ = 1.41 x 10^16

$x^{2} v = \sqrt{1.41*10^{16}}$ = 1.187 x 10^8 m/s

3 0

3 years ago

A car starting at rest accelerates to a speed of 6miles/hr in 5 sec what is the average acceleration

Luden [163]

Answer:

1.2 mi/hr/sec

Explanation:

a = Vf - Vi / t (formula)

-----------------------------------

6mi/hr - 0 mi/hr 6 mi/hr

a = ____________ = _______ = 1.2 mi/hr/sec

5 sec 5 sec

5 0

3 years ago

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Chuyển động thẳng đều là gì

suter [353]

Question:

What is uniform rectilinear motion?

Answer:

Uniform rectilinear motion is when an object travels at a constant speed with zero acceleration.

8 0

3 years ago

A depressive disorder is classified as a(n) ________ disorder.

IrinaK [193]

The answer is a mood disorder

4 0

3 years ago

Read 2 more answers