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2 years ago

A 0.38 kg drinking glass is filled with a hot liquid. The liquid transfers 7032 J of energy to the glass. If the

Physics

1 answer:

kaheart [24]2 years ago

7 0

Answer:

841 J/kg.K

Explanation:

The computation of the specific hear of the glass is shown below:

As we know that

E= cmΔt

where

c denotes specific heat

m denotes 0.38 kg

Δt = temperature = 22k

E denotes energy = 7032 J

Now

7032 J = (0.38) (22) (c)

7032 J = 8.36 (c)

So C = 7032 J ÷ 8.36

= 841 J/kg.K

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A hydraulic lift is designed to lift cars up to 2000 kg in mass.If the lift under the car is 1.0 m by 1.2m and the area of the i

Lerok [7]

Answer:

C) 160 N

Explanation:

$m$ = mass of the car = 2000 kg

Weight of the car is given as

$W = mg \\W = (2000) (9.8)\\W = 19600 N$

$F_{i}$ = Force exerted on the input piston

$A_{i}$ = Area of input piston = 10 cm x 10 cm = 0.1 m x 0.1 m = 0.01 m²

$A_{lift}$ = Area of lift = 1 m x 1.2 m = 1.2 m²

Using Pascal's law

$\frac{F_{i}}{A_{i}} = \frac{W}{A_{lift}}\\\frac{F_{i}}{0.01} = \frac{19600}{1.2}\\F_{i} = 160 N$

6 0

3 years ago

What is the efficiency of a tractor that has a work output of 300j and a work input of 400j

Sauron [17]

<h3><u>Answer;</u></h3>

= 75 %

<h3><u>Explanation</u>;</h3>

To measure efficiency of a machine, compare the work output to work input.

Efficiency = Work output/ work output × 100 %

= 300/400 × 100

= 75 %

5 0

3 years ago

A bicyclist was moving at a rate of 8 m/s, and then sped up to 10 m/s. If the cyclist has a mass of 120 kg, how much work was ne

sergeinik [125]

W=∆KE

KE=1/2m∆v^2

=1/2*120*(10-8) ^2

=240j

3 0

3 years ago

Read 2 more answers

A ball tied on a string rotates in a circular path as shown above. The only forces acting on the ball at any point are the weigh

Harlamova29_29 [7]

Answer:

the third one T-W

Explanation:

the direction of the Tension and weight are opposite

6 0

3 years ago

In your own words, what was the purpose of the field study?

DanielleElmas [232]

Answer:

Hi there! I have only the procedure and the scientific names of the creatures. Hope this helps!

Procedure

I studied the physical features of ten creatures and classified them using the key. I completed each section below and recorded the creature's scientific name in the data section.

The Creatures Scientific Names:

Fuzzus tallywag

Fuzzus pointilus

Silkus duosquirmus

Fuzzus chompilus

Silkus stretchilus

Silkus tallyhas

Fuzzus feelzalot

Silkus monosquirmus

Fuzzus squarilus

Silkus monowrestle

Have a thrilling Thursday!

~Lola

6 0

3 years ago