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Dmitry_Shevchenko [17]
3 years ago
11

True or false. there would be no like in earth without the sun

Physics
1 answer:
alisha [4.7K]3 years ago
6 0

hello!

True

have a goed day

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A cube of oak wood with very smooth faces normally floats in water. Suppose you submerge it completely and press one face flat a
Rom4ik [11]

Answer:

There is no Buoyant force.

The block will only float to the surface when the pressed face is released

Explanation:

There would be no Buoyancy force on the cube of Oak wood when one face is pressed flat against the Bottom of a tank and this is simply because there is no upward force acting on the side of the cube that is pressed against the bottom

Buoyant force is simply caused by the pressure difference between the water over and under an object immersed in water . hence since there is no water pressure under the immersed cube there will be no pressure difference between the water under and over the cube of oak wood immersed in the water.

3 0
3 years ago
If you were to come back to our solar system in 6 billion years, what might you expect to find?
WINSTONCH [101]

Answer:

A)a red giant star

5 0
4 years ago
Why can a star have several different habitable zones
Rzqust [24]

Because they are placed in different habitable zones

8 0
3 years ago
Billy drops a ball from a height of 1 m. The ball bounces back to a height of 0.8 m, then
Andreas93 [3]

Answer:

The displacement is  \Delta H =    -  1 \ m

The distance  is  D =  4 \  m

Explanation:

From  the question we are told that

    The height from which the ball is dropped is  h  =  1 \ m

    The height attained at  the first bounce is  h_1  = 0.8  \  m

    The height attained at  the second bounce is   h_2 = 0.5 \  m

    The height attained at  the third bounce is h_3 = 0.2 \  m

Note  : When calculating displacement we consider the direction of motion

Generally given that upward is positive  the total displacement of the ball is mathematically represented as

            \Delta H =  (0  -  h ) + ( h_1 - h_1 ) + (h_2 - h_2 )+ (h_3 - h_3)

Here the 0 show that there was no bounce back to the point where Billy released the ball  

           \Delta H =  (0  -  1 ) + ( 0.8- 0.8 ) + (0.5 - 0.5 )+ (0.2 - 0.2)

=>          \Delta H =    -  1 \ m

Generally the distance covered by the ball is mathematically represented as  

                D =  h +  2h_2 + 2h_3 + 2h_3

The 2 shows that the ball traveled the height two times

              D =  1 +  2* 0.8  + 2* 0.5 + 2* 0.2

=>           D =  4 \  m

     

5 0
3 years ago
Read the paragraph and then answer the question. "A giraffe has to stretch its neck to reach leaves for food. Over time, the gir
dangina [55]

The answer for this question is b, Lamarck!


7 0
3 years ago
Read 2 more answers
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