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3 years ago

Which of the following best characterizes an electron?

Physics

2 answers:

barxatty [35]3 years ago

4 0

A, electrons are negatively charged and do orbit around the nucleons

Daniel [21]3 years ago

4 0

The correct answer to this question is "C. positively charged particle that carries electrical current." This statement best characterizes an electron. An electron can be either bound to the nucleus of an atom or free. Thank you for posting your question. I hope that this answer helped you. Let me know if you need more help.

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An 73 cm long pendulum with a 0.80 kg bob is released from rest at an initial angle of θ0 with the vertical. at the bottom of th

kipiarov [429]

I dont know what the answer will be

8 0

3 years ago

PLZ HELP I DON'T UNDERSTAND!! a boy is playing catch with his friend. He throws the ball straight up. When it leaves his hand, t

algol13

Explanation:

The mass of a ball, m = 2 kg

It is traveling with a speed of 10 m/s

The ball's kinetic energy just as it leaves the boy's hand is calculated as follows :

$K=\dfrac{1}{2}mv^2\\\\K=\dfrac{1}{2}\times 2\times (10)^2\\\\=100\ J$

The ball's kinetic energy just as it leaves the boy's hand is 100 J. The potential energy of the ball when it reaches the highest point is same as the kinetic energy as it leaves the boy's hand.

Hence, the required kinetic and potential energy is 100 J.

6 0

3 years ago

2. A 2,000 kg rocket is launched 12 km straight up at a constant acceleration into the sky at which point the rocket is travelli

Mice21 [21]

Answer:

797700000 J

Explanation:

From the question,

The work done by the rocket, is given as,

W = Ek+Ep............. Equation 1

Where Ek and Ep are the potential and the kinetic energy of the rocket respectively.

Ep = mgh............ Equation 2

Ek = 1/2mv²............. equation 3

Substitute equation 2 and equation 3 into equation 1

W = mgh+1/2mv².............. Equation 4

Where m = mass of the rocket, h = height, v = velocity of the rocket, g = acceleration due to gravity.

Given: m = 2000 kg, h = 12 km = 12000 m, v = 750 m/s, g = 9.8 m/s²

Substitute into equation 4

W = 2000(12000)(9.8)+1/2(2000)(750²)

W = 235200000+562500000

W = 797700000 J

6 0

3 years ago

YALL HELP ME QUICK IN 10 MINS<br> WITH WORKING OUT

svetlana [45]

Answer:

bro I'm sorry I'm only in 7th grade

8 0

3 years ago

Read 2 more answers

A mass that weight stretches a spring . The system is acted on by an external force . If the mass is pushed up and then released

olchik [2.2K]

Answer:

x = A cos wt

Explanation:

To determine the position we are going to solve Newton's second law

F = m a

Spring complies with Hooke's law

F = -k x

And the acceleration of defined by

a = d²x / dt²

We substitute

- k x = m d²x / dt²

dx² / dt² + k/m x = 0

Let's call

w² = k / m

The solution to this type of differential equation is

x = A cos (wt + Ф)

Where A is the initial block displacement and the phase angle fi is determined by or some other initial condition.

In this case the body is released so that at the initial speed it is zero

From which we derive this expression

v = dx / dt = a w sin ( wt + Ф)

As the System is released for t = 0 the speed is v = 0

v = sin Ф = 0

Therefore Ф = 0

And the equation of motion is

x = A cos wt

4 0

3 years ago