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3 years ago

Which of the following are vector quantities?

Physics

2 answers:

Mazyrski [523]3 years ago

5 0

Answer:

displacement and acceleration

oksano4ka [1.4K]3 years ago

3 0

Answer:

Displacement and acceleration

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Which of the following objects uses two converging lenses to produce two images, the second of which is virtual, magnified, and

Katyanochek1 [597]

<span>Microscope. A basic microscope is made up of two converging lenses. One reason for using two lenses rather than just one is that it's easier to get higher magnification.</span>

3 0

3 years ago

You are riding a bicycle. If you apply a forward force of 125 N, and you and your bicycle have a mass of 86 kg, what will be the

Karolina [17]

Answer: B 1.52 m/s hope this helps

Explanation: I just took the test

3 0

3 years ago

Air enters an adiabatic compressor at 104 kPa and 292 K and exits at a temperature of 565 K. Determine the power (kW) for the co

ladessa [460]

Answer:

$\dot W_{in} = 49.386\,kW$

Explanation:

An adiabatic compressor is modelled as follows by using the First Law of Thermodynamics:

$\dot W_{in} + \dot m \cdot c_{p}\cdot (T_{1}-T_{2}) = 0$

The power consumed by the compressor can be calculated by the following expression:

$\dot W_{in} = \dot m \cdot c_{v}\cdot (T_{2}-T_{1})$

Let consider that air behaves ideally. The density of air at inlet is:

$P\cdot V = n\cdot R_{u}\cdot T$

$P\cdot V = \frac{m}{M}\cdot R_{u}\cdot T$

$\rho = \frac{P\cdot M}{R_{u}\cdot T}$

$\rho = \frac{(104\,kPa)\cdot (28.02\,\frac{kg}{kmol})}{(8.315\,\frac{kPa\cdot m^{3}}{kmol\cdot K} )\cdot (292\,K)}$

$\rho = 1.2\,\frac{kg}{m^{3}}$

The mass flow through compressor is:

$\dot m = \rho \cdot \dot V$

$\dot m = (1.2\,\frac{kg}{m^{3}})\cdot (0.15\,\frac{m^{3}}{s} )$

$\dot m = 0.18\,\frac{kg}{s}$

The work input is:

$\dot W_{in} = (0.18\,\frac{kg}{s} )\cdot (1.005\,\frac{kJ}{kg\cdot K})\cdot (565\,K-292\,K)$

$\dot W_{in} = 49.386\,kW$

5 0

3 years ago

What examples of cunduction, convection, or radiation are in a classroom?

HACTEHA [7]

Conduction: If the classroom gets super cold, the body temperature of students might change.

Convection: The cool air in a classroom can cool off the hot breath of the students.

8 0

3 years ago

In the figure, if Q = 52 µC q =10 µC and d = 55 cm, what is the magnitude of the electrostatic force on q?

GenaCL600 [577]

Answer:

F = 15.47 N

Explanation:

Given that,

Q = 52 µC

q = 10 µC

d = 55 cm = 0.55 m

We need to find the magnitude of the electrostatic force on q. The formula for the electrostatic force is given by :

$F=k\dfrac{q_1q_2}{d^2}\\\\F=9\times 10^9\times \dfrac{52\times 10^{-6}\times 10\times 10^{-6}}{(0.55)^2}\\\\F=15.47\ N$

So, the magnitude of the electrostatic force is 15.47 N.

4 0

3 years ago