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Mademuasel [1]
3 years ago
11

What is a scientific model?Question 2 options:A group of objects that interact with each other.A complex system made of many sma

ller systems.A way of representing a system to better understand it's behavior.Someone who walks down a runway wearing a lab coat.
Physics
1 answer:
HACTEHA [7]3 years ago
5 0

Answer:

A scientific model is a way of representing a system to better understand it's behavior

Explanation:

You might be interested in
If a waves frequency is 4Hz, and its wavelength is 5 m, then what is its speed?
hammer [34]

Answer:

speed = 20 m/s

Explanation:

speed = frequency * wavelength

speed = 4 * 5

speed = 20 m/s

6 0
3 years ago
If a platinum atom has 78 protons. How many electrons does it contain?​
GenaCL600 [577]
I think the answer would be 78 electrons, maybe?
3 0
4 years ago
A car moving at 10.0 m/s encounters a depression in the road that has a circular cross-section with a radius of 30.0 m. What is
Dennis_Churaev [7]

Answer:

F = 789 Newton

Explanation:

Given that,

Speed of the car, v = 10 m/s

Radius of circular path, r = 30 m

Mass of the passenger, m = 60 kg

To find :

The normal force exerted by the seat of the car when the it is at the bottom of the depression.

Solution,

Normal force acting on the car at the bottom of the depression is the sum of centripetal force and its weight.

N=mg+\dfrac{mv^2}{r}

N=m(g+\dfrac{v^2}{r})

N=60\times (9.81+\dfrac{(10)^2}{30})

N = 788.6 Newton

N = 789 Newton

So, the normal force exerted by the seat of the car is 789 Newton.

6 0
3 years ago
To determine athletes body fat, there are weighed first in air and then again while they are completely underwater. It is found
rodikova [14]

Answer:

1065 Kgm-3

Explanation:

We can determine the relative density of the athlete from the formula;

Relative density of athlete = weight of athlete in air/upthrust on athlete

Since weight of athlete in air= 690 N

Weight of athlete in water = 42 N

Upthrust on athlete= weight in air - weight in water

Upthrust on athlete= 690 N - 42 N = 648 N

Relative density of athlete= 690 N / 648 N

Relative density of athlete= 1.065

Therefore, average density of the athlete= relative density × density of water = 1.065 × 1000 Kgm-3 = 1065 Kgm-3

4 0
4 years ago
What is meant by electricity and magnetism
AURORKA [14]

Electricity is just the flow of electrons or charges from a point of production through a conductor, to another point where it can be utilized or converted to another form of energy.

Magnetism is the force exerted by magnets when they attract or repel each other. Magnetism is caused by the motion of electric charges from two or more magnetic substances.

4 0
3 years ago
Read 2 more answers
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