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sattari [20]
2 years ago
9

Motors are used to convert electrical energy into mechanical work and the output mechanical work of a motor is rated in horsepow

er. 1 hp equals _____.
Engineering
1 answer:
Vladimir [108]2 years ago
5 0

Answer:

Which discovery did Gregor Mendel make to the 9=086

Explanation:

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Two grenades, A and B, are thrown horizontally with different speeds from the top of a cliff 70 m high. The speed of A is 2.50 m
Aloiza [94]

Explanation:

uuui ielts k oshru with the best of my life u

3 0
3 years ago
A household refrigerator that has a power input of 450 W and a COP of 1.5 is to cool five large watermelons, 10 kg each, to 8°C.
Andreyy89

Answer:

6222.22 sec

Explanation:

Given data the power input to the refrigerator is 450 W

The COP of refrigerator is 1.5

Temperature T_1=8^{\circ}C

T_2=28^{\circ}C

mass of watermelon =10 kg

specific heat =4.2 KJ/kg°C

The amount of heat removed from 5 watermelon

Q=mc_pdt=5\times 10\times 4.2\times (28-8)=4200 KJ

We know that COP=\frac{Q_1}{W}

1.5=\frac{Q_1}{450}

Q_1=675 W=0.675 KW

so time required to cool the watermelon is

t=\frac{Q_1}{Q_2}=\frac{4200}{0.675}=6222.22 sec  

4 0
3 years ago
The mechanical properties of a metal may be improved by incorporating fine particles of its oxide. Given that the moduli of elas
Lilit [14]

Answer:

A) 209.12 GPa

B) 105.41 GPa

Explanation:

We are given;

Modulus of elasticity of the metal; E_m = 67 GPa

Modulus of elasticity of the oxide; E_f = 390 GPa

Composition of oxide particles; V_f = 44% = 0.44

A) Formula for upper bound modulus of elasticity is given as;

E = E_m(1 - V_f) + (E_f × V_f)

Plugging in the relevant values gives;

E = (67(1 - 0.44)) + (390 × 0.44)

E = 209.12 GPa

B) Formula for upper bound modulus of elasticity is given as;

E = 1/[(V_f/E_f) + (1 - V_f)/E_m]

Plugging in the relevant values;

E = 1/((0.44/390) + ((1 - 0.44)/67))

E = 105.41 GPa

4 0
3 years ago
The function f determines the cost (in dollars) of a new Honda Accord in terms of the number of years t since 2000. That is, f (
lutik1710 [3]

Answer:

f(5)

Explanation:

Function notation  is  a precise way of giving information about a function without need for a lengthy written explanation. The most common function notation is f (x) which is interpreted as "f of x".

For the year 2005,

t = 2005 -2000

= 5

Using the function notation to represent the cost (in dollars) of a new Accord in 2005 is f(5)

7 0
4 years ago
Read 2 more answers
WHAT IS MEANT BY BJT AND FUNCTION OF BJT
Andrej [43]

Answer:

A Bipolar Junction Transistor, or BJT, is a solid-state device in which the current flow between two terminals (the collector and the emitter) is controlled by the amount of current that flows through a third terminal (the base).

The main basic function of a BJT is to amplify current it will allow BJTs are used as amplifiers or switches to produce wide applicability in electronic equipment include mobile phones, industrial control, television, and radio transmitters. There are two different types of BJTs are available, they are NPN and PNP.

8 0
3 years ago
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