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Tpy6a [65]
3 years ago
6

A tank in the shape of an inverted cone has a height of 11 meters and a base radius of 6 meters. The tank is full of water. How

much work is required to pump the water over the upper edge of the tank until the height of the water remaining in the tank is 9 meters

Physics
1 answer:
SOVA2 [1]3 years ago
7 0

Explanation:

Below are attachments containing the solution.

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A star is moving away from an observer at 1% of the speed of light. At what wavelength would the observer find an emission line
Ivan

Answer:

  λ = 5940 Angstroms

Explanation:

This is an exercise of the relativistic Doppler effect

        f’= f  √((1- v / c) / (1 + v / c))

Where the speed in between the strr and the observer is positive if they move away

Let's use the relationship

         c = λ f

         f = c /λ

We replace

              c /λ’ = c /λ  √ ((1- v / c) / (1 + v / c))

              λ = λ’ √ ((1- v / c) / (1 + v / c))

Let's calculate

             v = 0.01 c

             v = 0.01 3 10⁸

             v=  3 10⁶ m / s

             λ = 6000 √ [(1- 3 10⁶/3 10⁸) / (1+ 3 10⁶/3 10⁸)]

             λ = 6000 √ [0.99 / 1.01]

             λ = 5940 Angstroms

6 0
3 years ago
How is momentum conserved in a Newton's cradle when one steel ball hits the other?
lora16 [44]

Answer:Both balls have momentum to start,and they share it after collision

Explanation:both balls have momentum to start and they share it after collision

7 0
3 years ago
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Yvonne has gained a reputation for her cheesecakes. She takes orders for 10 cheesecakes and spends 8.5 hours on one Saturday bak
VLD [36.1K]
A) 10÷8.5
b) 120÷10
c) answer A÷Answer B.

sure on first two, not so sure on C.
3 0
2 years ago
At t= 0, a particle moving in the xy plane with constant acceleration has a velocity of Vi= (3.00i -2.00j) m/s and is at the ori
ivanzaharov [21]

Answer:

(a) a = (2i + 4.5j) m/s^2

(b) r = ro + vot + (1/2)at^2

Explanation:

(a) The acceleration of the particle is given by:

\vec{a}=\frac{\vec{v}-\vec{v_o}}{t}\\\\

vo: initial velocity = (3.00i -2.00j) m/s

v: final velocity = (9.00i + 7.00j) m/s

t = 3s

by replacing the values of the vectors and time you obtain:

\vec{a}=\frac{1}{3s}[(9.00-3.00)\hat{i}+(7.00-(-2.00))\hat{j}]\\\\\vec{a}=(2\hat{i}+4.5\hat{j})m/s^2

(b) The position vector is given by:

\vec{r}=\vec{r_o}+\vec{v_o}t+\frac{1}{2}\vec{a}t^2

where vo = (3.00i -2.00j) m/s and a = (2.00i + 4.50j)m/s^2

4 0
2 years ago
Which element is not part of the rhetorical triangle designed by Aristotle? speaker credibility audience emotion content logic l
ser-zykov [4K]
The correct answer is this one: "length of address." The element that is not part of Aristotle's rhetorical triangle is the length of the address. The rhetorical triangle of Aristotle are the logos, pathos, and ethos. Logos is the logic, Pathos is the audience emotion, Ethos is the speaker's credibility.
3 0
2 years ago
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