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Simora [160]
3 years ago
13

A 1kg of compound a with specific heat capacity of 1000J is heated increasing its temp by 1 degree. How much energy has been add

ed to block
Physics
1 answer:
Orlov [11]3 years ago
3 0
This is the definition of specific heat capacity. 1000J of heat are required to raise the temperature of 1kg of the compound by 1 degree. Therefore a 1000J have been added to the block.

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A ball is thrown up onto a roof, landing 4 sec later at height of 20m above the release level. The balls path just before landin
Kobotan [32]
<span>c) what is the angle (relative to the horizontal) of the balls initial velocity? </span>
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3 years ago
A hockey puck is at rest on a flat surface. Then one end of the surface is lifted gradually, forming an inclined plane of increa
Jlenok [28]

The coefficient of static friction between the puck and the surface.

In fact, that coefficient describes exactly how "hard" it is to cause the puck to start moving, if it starts from an idle condition.

6 0
3 years ago
Read 2 more answers
A boy is whirling a stone around his head by means of a string. The string makes one complete revolution every second, and the t
slega [8]

Answer:

The tension increases to four times its original value.

Explanation:

v = Velocity

r = Radius

m = Mass of stone

The centripetal force is

F_c=m\dfrac{v^2}{r}

The tension will balance the centripetal force

T=m\dfrac{v^2}{r}

\\\Rightarrow T\propto v^2

\dfrac{T_1}{T_2}=\dfrac{v_1^2}{v_2^2}\\\Rightarrow \dfrac{T_1}{T_2}=\dfrac{v_1}{2^2v_1^2}\\\Rightarrow \dfrac{T_1}{T_2}=\dfrac{1}{4}\\\Rightarrow T_2=4T_1

The new tension will be 4 times the old tension

5 0
3 years ago
A textbook of mass 2.10 kg rests on a frictionless, horizontal surface. A cord attached to the book passes over a pulley whose d
Lilit [14]

Answer:

the tension in the part of the cord attached to the textbook is 7.4989 N

Explanation:

Given the data in the question;

As illustrated in the image below;

first we determine the value of the acceleration,

along vertical direction; we use the second equation of motion;

y = ut + \frac{1}{2}a_yt²

we substitute;

0 m/s for u, 1.29 m for y, 0.850 s for t,

1.29 = 0×0.850  + \frac{1}{2}×a_y×(0.850)²

1.29 = 0.36125a_y

a_y = 1.29 / 0.36125

a_y = 3.5709 m/s²

Now when the text book is moving with acceleration , the dynamic equation will be;

T₁ = m₁a_y

where m₁ is the mass of the text book ( 2.10 kg )

a_y is the vertical acceleration ( 3.5709 m/s² )

so we substitute

T₁ = 2.10 × 3.5709

T₁ = 7.4989 N

Therefore, the tension in the part of the cord attached to the textbook is 7.4989 N

3 0
3 years ago
The body of rules and procedures that guide the measurement and communication of financial accounting information in the United
sashaice [31]

Answer:

Generally Accepted Accounting Principles (GAAP)

Explanation:

The body of rules and procedures that guide the measurement and communication of financial accounting information in the United States is known as:

4 0
3 years ago
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