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3 years ago

Which moon phase happens next after a new moon

2 answers:

4 0

The correct answer is a waxing crescent moon. (waxing is when the moon is getting bigger, and waning is when it’s getting smaller.)

bogdanovich [222]3 years ago

3 0

The correct answer is: Crescent moon.

I hope this helps you!

Brainliest answer is always appreciated!

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An electron accelerated from rest through a voltage of 780 v enters a region of constant magnetic field. part a part complete if

maxonik [38]

The electron is accelerated through a potential difference of $\Delta V=780 V$ , so the kinetic energy gained by the electron is equal to its variation of electrical potential energy:
$\frac{1}{2}mv^2 = e \Delta V$
where
m is the electron mass
v is the final speed of the electron
e is the electron charge
$\Delta V$ is the potential difference

Re-arranging this equation, we can find the speed of the electron before entering the magnetic field:
$v= \sqrt{ \frac{2 e \Delta V}{m} } = \sqrt{ \frac{2(1.6 \cdot 10^{-19}C)(780 V)}{9.1 \cdot 10^{-31} kg} }=1.66 \cdot 10^7 m/s$

Now the electron enters the magnetic field. The Lorentz force provides the centripetal force that keeps the electron in circular orbit:
$evB=m \frac{v^2}{r}$
where B is the intensity of the magnetic field and r is the orbital radius. Since the radius is r=25 cm=0.25 m, we can re-arrange this equation to find B:
$B= \frac{mv}{er}= \frac{(9.1 \cdot 10^{-31}kg)(1.66 \cdot 10^7 m/s)}{(1.6 \cdot 10^{-19}C)(0.25 m)} =3.8 \cdot 10^{-4} T$

3 0

4 years ago

Science Write two examples of heating appliances

bearhunter [10]

Answer:

a} Infrared radiant heaters.

b} Fan heaters.

Explanation:

I hope this is okay, should I give more.

4 0

3 years ago

Pendulum clocks generally run fast in winter and slow in summer

Harman [31]

If the question is true or false then the answer is true

5 0

3 years ago

Read 2 more answers

A ball is thrown upward with an initial velocity of +9.8 m/s. How high does it reach before it starts descending?

aksik [14]

Hope this helps you.

3 0

3 years ago

A skater of mass 40 kg is carrying a box of mass 5 kg. The skater has a speed of 5 m/s with respect to the floor and is gliding

Yuki888 [10]

For the part a) we need only the momentum of the box and we have the data to find it.

Momentum is given by,

$p=mv$

where clearly, p is the momentum, m the mass of the box and v is the velocity.

Substituting,

$p=(5kg)(5m/s)\\p=25kg.m/s$

For part b) we need an analysis of the situation. We understand that the box on a surface that has no friction will continue to rotate at the same speed previously defined. The box can only stop with friction, so,

$p=(5kg)(5m/s)\\p=25kg.m/s$

It is the same that part a)

8 0

3 years ago