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uysha [10]
3 years ago
15

Only the object having density less than water float, why?​

Physics
2 answers:
jeyben [28]3 years ago
3 0

Answer:

The way that objects float is that at any depth in a fluid there is an upward force due to the effect of gravity on the fluid. ... If the density is less than that of the fluid, the object will float upward due to the buoyancy from the fluid.

bearhunter [10]3 years ago
3 0

Answer:

The way that objects float is that at any depth in a fluid there is an upward force due to the effect of gravity on the fluid. ... If the density is less than that of the fluid, the object will float upward due to the buoyancy from the fluid.

Explanation:

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Choose all facts that increase the orbital velocity of a vessel around planet B. Bigger mass of planet B smaller mass of planet
telo118 [61]

Answer:

- Bigger mass of planet B  

- orbiting closer to planet B

Explanation:

The orbital velocity of the vessel around the planet can be found by equalizing the force of gravity between the vessel and the planet and the centripetal force:

G\frac{mM}{r^2}=m\frac{v^2}{r}

where

G is the gravitational constant

m is the mass of the vessel

M is the mass of the planet

r is the distance between the vessel and the centre of the planet

v is the orbital velocity of the vessel

Re-arranging the formula, we find an expression for v:

v=\sqrt{\frac{GM}{r}}

We see that:

- the bigger the mass of the planet, M, the bigger the velocity

- the bigger the distance between the vessel and the planet, r, the smaller the velocity

So, the correct choices that increase the orbital velocity are:

- Bigger mass of planet B  

- orbiting closer to planet B

6 0
3 years ago
13. If both the directions of velocity and acceleration are negative, ...........
lawyer [7]

Answer:

B)velocity of object decreases

Explanation:

Consider the positive x axis as positive direction

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It's acceleration also alone negative x-axis direction

So according to our consideration

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That is both are towards negative x direction

But as both velocity and acceleration are in same direction, MAGNITUDE of velocity increases

But as magnitude increases in negative direction, velocity value decreases

But speed value increases(As speed is scalar and velocity is a vector)

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What is one way to describe elements
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They are the smallest pancise of any matere

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