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Nikitich [7]
3 years ago
9

In chemistry class, you are given 3 liquids: Liquid A, Liquid B, and Liquid C. They are each in their own beaker. One of these l

iquids is water which has a denisty of 1.0 g/mL. You also have an ice cube with a density of 0.92 g/mL, and a piece of cork with a density of 0.85 g/mL When all 3 liquids are mixed together, liquid B is on the bottom. The ice cube will float in B and sink in the other two liquids. A piece of cork will float in Liquid A but sink in Liquid C. What is the approximate density of Liquid A?
A. Less than 0.85 g/mL
B. Between 0.92 g/mL and 1.0 g/mL
C. Greater than 1.0 g/mL
D. Between 0.85 g/mL and 0.92 g/mL
Physics
1 answer:
ella [17]3 years ago
7 0

Answer:

D. Between .85 and .92 g/mL.

Explanation:

In liquid A, ice sinks that means its density is less than that of ice or less than .92 g/mL. But in liquid A , piece of cork floats , that means its density is more than that of cork or .85 g/mL. Therefore we can say that liquid A has density in between .92 and .85 g/mL.

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"A student bikes to school by traveling first dN = 0.900" and "Similarly, let d⃗ W be the displacement vector corresponding to t
raketka [301]

Complete Question

A student bikes to school by traveling first dN = 0.900 miles north, then dW = 0.300 miles west, and finally dS = 0.100 miles south.

Similarly, let d⃗ W be the displacement vector corresponding to the second leg of the student's trip. Express d⃗ W in component form.

Express your answer as two numbers separated by a comma. Be careful with your signs.

Answer:

The value is  dT  =  ( -0.3,  0.8)

Explanation:

From the question we are told that

   The first displacement is  dN  =  0.900 \  due  \  North i.e positive  y-axis

   The  second displacement is  dW =  0.300 \  miles  \  due \  west i.e negative  x-axis

   The final displacement is  dS =  0.100 \  miles \ due \ south i.e  negative  y-axis

Generally dW in component for is  

      dW =  (-0.3 ,  0)  

Generally the  total displacement of the student is mathematically represented as

     dT  =  ( -0.3,  (0.90 - 0.10))

      dT  =  ( -0.3,  0.8)

 

   

   

6 0
3 years ago
Who developed radiometric dating? What age did he assign to the oldest rocks?
Mekhanik [1.2K]
Ernest Rutherford
don't know the age sorry

5 0
3 years ago
Calculati rezistenta filamentului unui bec al lanternei de buzunar daca la tensiunea de 3,5 v el este parcurs de un curent cu in
Gennadij [26K]

Answer:

Resistencia = 12.5 Ohmios

Explanation:

Dados los siguientes parámetros;

Voltaje = 3.5 Volts

Corriente = 0.28 Amps

Para encontrar el resistencia;

La ley de Ohm establece que a temperatura constante, la corriente que fluye en un circuito eléctrico es directamente proporcional al voltaje aplicado en los dos puntos e inversamente proporcional a la resistencia en el circuito eléctrico.

Matemáticamente, La ley de Ohm viene dada por la fórmula;

Voltaje = corriente * resistencia

Resistencia = voltaje/corriente

Resistencia = 3.5/0.28

Resistencia = 12.5 Ohmios

Por tanto, la resistencia del filamento de una linterna de bolsillo es de 12,5 ohmios.

3 0
3 years ago
Two moles of helium gas initially at 438 K and 0.44 atm are compressed isothermally to 1.61 atm. Find the final volume of the ga
docker41 [41]

Answer:

44.64335 L

Explanation:

R = Gas constant = 8.314 J/mol K = 0.08205 L atm/mol K

P = Pressure

V = Volume

T = Temperature = 438 K

1 denotes initial

2 denotes final

From ideal gas law we have

PV=nRT\\\Rightarrow V=\dfrac{nRT}{P}\\\Rightarrow V=\dfrac{2\times 0.08205\times 438}{0.44}\\\Rightarrow V=163.35409\ L

So,

P_1V_1=P_2V_2\\\Rightarrow V_2=\dfrac{P_1V_1}{P_2}\\\Rightarrow V_2=\dfrac{0.44\times 163.35409}{1.61}\\\Rightarrow V_2=44.64335\ L

The volume of Helium is 44.64335 L

5 0
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Phase unbalance causes three-phase motors to operate at temperatures ? and, therefore, the motor cannot deliver its rated horsep
anastassius [24]

Phase unbalance causes three-phase motors to operate at temperatures higher than nameplate ratings and, therefore, the motor cannot deliver its rated horsepower.

<h3>What is an electric vehicle (EV)?</h3>

An EV stands for an electric vehicle. Electric vehicles (EVs) are autos that are powered totally or partially by electricity.

Electric cars are extremely cost-effective to run because they have fewer moving parts to maintain and use little to no fossil fuels (petrol or diesel).

Hence, three-phase motors operating with phase imbalance run at temperatures over nameplate limits, which prevents the motor from producing its rated horsepower.

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To learn more about electric vehicles here,

brainly.com/question/27434548

#SPJ4

7 0
2 years ago
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