What two factors affect the amount of friction that act on a moving object?

Answers

Answer 1
Answer: The types of surfaces and the amount of pressure being put on them.
Answer 2
Answer: How hard the surfaces push together and the type of surface it is rubbing against.  Refer to this practice packet

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Which of these are considered an oxidizing mutagenic agent?a. x-rays
b. benzopyrene
c. gamma rays

Answers

X - rays are considered an oxidizing mutagenic agent. The answer is letter A. X-rays are high energy electrons that can cause damage when exposed under extreme conditions. The best technology that can block it is t using a lightweight type of metal foam. It can take in high energy collisions which also exhibits high forces. it does not only block x-rays but also, neutron radiation and gamma rays.

 

Answer: X-rays is what's considered an oxidizing mutagenic agent

One property that makes electromagnetic waves differ from other types of waves is that they canmove particles in a medium

travel in a vacuum

transfer energy

create a disturbance

Answers

Create a disturbance

If the frequencies of two component waves are 24 Hz and 20 Hz, they should produce _______ beats per second. A. 2
B. 8
C. 4
D. 12

Answers

This can be answered using the beat frequency formula, which is simply the difference between 2 frequencies.

Let: fᵇ = beat frequency
f₁ = first frequency
f₂ = second frequency

fᵇ = |f₁ - f₂|

substituting the values:
fᵇ = |24Hz - 20Hz|
fᵇ = 4Hz

The unit Hz also means beats per second, therefore:
fᵇ = 4 beats per second

Therefore, the answer is C. 4

C. 4 beats per second is correct

A single star in the process of forming starts by spinning slowly (while it is quite large and relatively cool.) As the star collapses under the pull of its own gravity, its size decreases. As a result, its rate of spinning:_____.

Answers

Answer:

Explanation:

According to the conservation of momentum, when the external torque is not applied on the system, then the angular momentum of the system is conserved.

I x ω = constant

I_(1)\omega _(1)=I_(2)\omega _(2)

where, I is the moment if inertia and ω is the angular velocity

As the star is collapsed, the radius decreases and hence the moment of inertia also decreases.

According to the law, the angular velocity increases, thus the rate of spinning increases.

What is the formula for finding your maximum heart rate

Answers

According to the American Heart Association, the broad,
approximate guideline for your MAXIMUM heart rate is:

                 --  take 220
                 --  subtract your age
                     The unit is "beats per minute".

But there are many things that have an effect on this number.
A few of them are: 
-- your age
-- your weight
-- any medicines you're taking
-- HOW you measure your heart rate.

If you're planning any REGULAR activity that will play with
your heart rate, you really ought to discuss it with your doctor
before you jump in.

Four wire AB,BC,CD and DA each resistance 4 ohm and a fifth wire BD of resistance 8 ohm are joined to form a rectangle to which BD is a diagonal.The effective resistance between the points A and B is?

Answers

Since it's so late, and it's way past my bedtime, and I'm tired and hungry,
and I still have real work to do, and I don't think you're really a legitimate
asker of Brainly questions anyway, I'm going to do something that's against
my principles and I almost never do.  I'm going to violate my own personal
Prime Directive, and give you the answer without any explanation of where
it comes from.

Ready ?

Here goes:

The effective resistance between points 'A' and 'B' is (2 and 2/3) Ω .