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Nimfa-mama [501]

2 years ago

12

The nutritional label above came from a can of soup how many servings of soup would you need to eat to receive your recommended

daily value of 25 grams of dietary fiber

1 answer:

Flauer [41]2 years ago

3 0

Each serving gives 3 grams or 12% of daily recommended value. Divide 100% by 12% to get 8.33 servings to obtain the daily recommended value of 25 grams.

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in a mass spectrometer ionized molecules are accelerated from rest through a potential difference V into a uniform magnetic fiel

strojnjashka [21]

Answer:

Potential difference = 245 V

Explanation:

First, we have to find velocity at which ionized molecules are accelerated into a magnetic field. Here, magnetic force acts as a centripetal force due to circular path of molecules towards detector slot.

B= 0.25 T,d= 12 cm
mass = (12+16+16)×1.67×10-27kg

Now, the magnetic force to the centripetal force equates as:

qvB = $\frac{mv2}{r}$ = $\frac{mv2}{d/2}$

For Velocity (v) :

v = $\frac{qBd}{2m}$

According to law of conservation of energy, we know that the initial potential energy of the molecules is converted into kinetic energy as they enter into the magnetic field. So,

$qV=\frac{1}{2}mv2$

Substitute the value of v in above equation:

qV = $\frac{1}{2}$ m $\frac{q2B2d2}{4m2}$

V = $\frac{qB2d2}{8m}$

V= 245 V

3 0

2 years ago

Lightbulb A is marked "25 W 120V, "and lightbulb B is marked "100 W 120V " These labels mean that each lightbulb has its respect

Dovator [93]

The cost of running the lightbulb A for 30 days at 0.110 per KWh is 1.98

<h3>How to determine the energy </h3>

We'll beging by calculating the energy used by lightbulb A. This can be obtained as follow:

Power (P) = 25 watts = 25 / 1000 = 0.025 KW
Time (t) = 30 days = 30 × 24 = 720 h
Energy (E) =?

E = Pt

E = 0.025 × 720

E = 18 KWh

<h3>How to determine the cost for running the bulb for 30 days</h3>

The cost of running the bulb for 30 days can be obtained as follow:

Cost per KWh = 0.11
Energy (E) = 18 KWh
Cost =?

Cost = energy × Cost per KWh

Cost = 18 × 0.11

Cost = 1.98

Lean more about buying electrical energy:

brainly.com/question/16963941

#SPJ4

3 0

2 years ago

You are standing on a sheet of ice that covers the football stadium parking lot in Buffalo; there is

Arlecino [84]

Answer:

a) $v=0.5405\ m.s^{-1}$

b) $v_p'=0.1143\ m.s^{-1}$

Explanation:

Given:

mass of ball, $m_b=4\ kg$

initial speed of the ball, $v_b=10\ m.s^{-1}$

mass of the person, $m_p=70\ kg$

a)

Using the conservation of linear momentum:

When the person catches the ball, assuming that the person catches it with an impact without absorbing the shock.

$m_b.v_b=(m_b+m_p)v$

$4\times 10=(4+70)\times v$

$v=0.5405\ m.s^{-1}$

b)

When the ball hits the person and bounces off with the velocity of $v_b'=8\ m.s^{-1}$ .

Using the conservation of linear momentum:

$m_b.v_b+m_p.v_p=m_b.v_b'+m_p.v_p'$

where:

$v_b'=$ final speed of the ball after collision

$v_p'=$ final speed of the person after collision

$v_p=$ initial velocity of the person = 0

putting the respective values in the above eq.

$4\times 10+0=4\times 8+70\times v_p'$

$v_p'=0.1143\ m.s^{-1}$

8 0

3 years ago

Read 2 more answers

Friends who are your age and share the same interests are called

Pie

The answer is C, a peer group.

6 0

3 years ago

Read 2 more answers

Please Help!!!!

Len [333]

Answer:

v = 0.92 c

Explanation:

Here, we will use the time dilation formula from Einstein's theory of relativity to find the speed of traveling of the friend:

$t =\frac{t_o}{\sqrt{1-\frac{v^2}{c^2}}} \\\\\\\sqrt{1-\frac{v^2}{c^2}}=\frac{t_o}{t}\\\\$

where,

v = speed of traveling = ?

c = speed of light

t = time of return = 10 years

t₀ = time passed on earth = 4 years

Therefore,

$\sqrt{1-\frac{v^2}{c^2}} = \frac{4\ years}{10\ years}\\\\ 1-\frac{v^2}{c^2}=(\frac{2}{5})^2\\\\\frac{v^2}{c^2} = 1-\frac{4}{25}\\\\\frac{v^2}{c^2} = \frac{21}{25}\\\\v^2 = 0.84c^2\\\\$

<u>v = 0.92 c</u>

8 0

2 years ago