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4 years ago

What is Archimedes' principle?

1 answer:

Rudiy274 years ago

8 0

Archimedes' principle states that the upward buoyant force that is exerted on a body immersed in a fluid, whether fully or partially submerged, is equal to the weight of the fluid that the body displaces and acts in the upward direction at the center of mass of the displaced

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What is the speed of a wave if the frequency is 2.34 and the wavelength is 7.3?

Zepler [3.9K]

Answer:

v= 17.082m/s

Explanation:

v= f( lambda)

v= 2.34(7.3)

v= 17.082m/s

3 0

3 years ago

The per-unit impedance of a single-phase electric load is 0.3. The base power is 500 kVA, and the base voltage is 13.8 kV. a. Fi

Leto [7]

Answer:

114.26

Explanation:

a)Formula for per unit impedance for change of base is

Zpu2= Zpu1×(kV1/kV2)²×(kVA2/kVA1)

Zpu2: New per unit impedance

Zpu1: given per unit impedance

kV1: give base voltage

kV2: New bas votlage

kVA1: given bas power

kVA2: new base power

In the question

Zpu2=??

Zpu1= 0.3

kV2=24kV

kV1= 13.8 kV

kVA2= 1MVA ×1000= 1000 kVA

kVA1=500kVA

Zpu2= 0.3(13.8/24)²×(1000/500)

Zpu2= 0.198

b) to find ohmic impedance we will first calculate base value of impedance(Zbase). So,

Zbase= kV²/MVA

Zbase= 13.8²/(500/1000)

Zbase=380.88

Now that we have base value of impedance, Zbase, we can calculate actual ohmic value of impedance(Zactual) by using the following formula:

Zpu=Zactual/Zbase

0.3= Zactual/380.88

Zactual= 114.26 ohms

8 0

4 years ago

for a certain chemical reaction, the reactants contain 52 kj of potential energy and the products contain 32 kj how much energy

Luden [163]

B, is the answer. (20 kj is released)

7 0

3 years ago

Read 2 more answers

. Write the following in the scientific notation of 0.0000002400m

aleksandr82 [10.1K]

Explanation:

<h2>Steps :</h2>

Move decimal from left to right =0 000000240.0
Then count the numbers before decimal and write it like this =240.0x10 power-9
That's all

hope it help

7 0

3 years ago

1. What do you notice or wonder about ultrasound imaging? (black and white pictures)

a_sh-v [17]

Answer:

the shape how it involve into a picture

Explanation:

3 0

3 years ago