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2 years ago

Pls help I give brainliest: What is physical weathering?

Physics

1 answer:

-Dominant- [34]2 years ago

8 0

Answer:

B:The breakdown of rocks into smaller rocks

Explanation:

Physical weathering is breaking down rocks, but it doesn't change what the rock is made out of.

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Scientists usually write reports about their investigations. Why do they do this?

worty [1.4K]

As for me, the reson why scientists usually write reports about their investigations is because they want to <span>d. to communicate their work to other scientist. As far as I am concerned in this sphere they have to get many other opnions besides their own in order to complete or expand one that they have made up. Hope it helps :)</span>

5 0

3 years ago

The force required to drag several objects across a floor was measured. Calculate the µK for these objects.

olganol [36]

Answer:

Explanation:

Case-A

Block weight $W=150\ lb$

Friction Force $f=30\ lb$

and friction force is

$f=\mu _kN$

where N=normal reaction (Usually equals to weight)

$\mu _k=\frac{30}{150}$

$\mu _K=\frac{1}{5}=0.2$

Case-B

Block weight $W=20\ N$

Friction Force $f=5\ N$

$\mu _k=\frac{f}{N}$

$\mu _k=\frac{5}{20}=\frac{1}{4}$

$\mu _k=0.25$

Case-C

Block weight $W=1500\ lb$

Friction Force $f=60\ lb$

$\mu _k=\frac{f}{N}$

$\mu _k=\frac{60}{1500}$

$\mu _k=0.04$

4 0

4 years ago

A projectile is fired with a velocity of 22 m/s at an angle of 25°. What is the vertical component of the velocity?

7nadin3 [17]

Answer:

Vertical component of velocity is 9.29 m/s

Explanation:

Given that,

Velocity of projection of a projectile, v = 22 m/s

It is fired at an angle of 22°

The horizontal component of velocity is v cosθ

The vertical component of velocity is v sinθ

So, vertical component is given by :

$v_y=v\ sin(25)$

$v_y=22\ m/s\times\ sin(25)$

$v_y=9.29\ m/s$

Hence, the vertical component of the velocity is 9.29 m/s

3 0

4 years ago

What two motions do all planets have?

mixas84 [53]

Answer:

The two planetary movements are revolution and rotation.

Explanation:

In the vast solar system, planets traverse while also remaining fixated within the system because of gravity. Each planet is unique and so is its movement, but, at the same time, there are two common types of movements.

5 0

3 years ago

Read 2 more answers

I will give you BRAINILIEST!!!!!!!!! AND 15 POINTS

Zigmanuir [339]

Hello.

The best answer would be A.Rift Valley.

It forms when l tectonical plates move away froem each other.

Have a nice day :)

4 0

3 years ago