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3 years ago

11

An example of an opinion would be which of the following? bob s burgers is the best show on television. cake is appropriate for

many occasions. earth is 238,900 miles from the moon. none of these

2 answers:

muminat3 years ago

8 0

The first one is an opinion though the second could be too it is for sure the first

Snowcat [4.5K]3 years ago

4 0

Bobs Burgers is the best show on television is an opinion

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Two blocks of ice, one four times as heavy as the other, are at rest on a frozen lake. A person pushes each block the same dista

ANEK [815]

Answer:

The kinetic energy of the heavier block after the push is equal to the kinetic energy of the lighter block

Explanation:

Kinetic energy of smaller object

$K=(1/2)mv^2$

where m= mass of smaller object and v= velocity of smaller object

Also, it is given that heavier object is four times the mass of lighter object and consider its velocity as V

kinetic energy of heavier block $K '= (1/2) (4m) V^2$

Now, For smaller block , $v^2 - u^2=2aS$

[by Newtons laws of motion]

Also, $v^2 = 2(F/m)S$

Where S= displacement, F= force, u= initial velocity

So, $K=(1/2)m[2(F/m)]S$

$\Rightarrow K = FS$

For heavier block ,

$V^2 - u^2 = 2a'S$

or, $V^2=2(F /4m)S$

So, $K '= (1/2)(4m)[2(F/4m)S$

$\Rightarrow K'= FS$

Therefore the kinetic energy of the heavier block after the push is equal to the kinetic energy of the lighter block

5 0

3 years ago

An object pulled to the right by two forces has an acceleration of 2.5m/s2. The free-body diagram shows the forces acting on the

Vanyuwa [196]

Answer:

490 N is the correct answer.

Explanation:

8 0

3 years ago

If object is above it lowest point what ever does it have

eimsori [14]

Can you reword the sentence?

6 0

3 years ago

A worker is holding a filled gas cylinder still. Which two sentences are true about the energy of the filled gas cylinder?

IrinaVladis [17]

I believe the answer is 3 and 5.<span />

6 0

3 years ago

Read 2 more answers

An object is thrown upward from the top of a 128-foot building with an initial velocity of 112 feet per second. The height h of

lorasvet [3.4K]

Answer:

Time, t = 8 seconds

Explanation:

An object is thrown upward from the top of a 128-foot building with an initial velocity of 112 feet per second. The height h as a function of time t is given by :

$h=-16t^2+112t+128$

We need to find the time when the object will hit the ground. When it will hit the ground, h = 0

So,

$-16t^2+112t+128=0$

On solving the above quadratic equation, we get the value of t = 8 seconds. So, after 8 seconds the object will hit the ground. Hence, this is the required solution.

6 0

4 years ago