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4 years ago

can someone help me? i need to make a electromagnetic spectrum but i have no idea how can someone help me?

1 answer:

7 0

Have you tried searching "electromagnetic spectrum" on Floogle ? When I did that just now, I got a definition and 11 pictures !

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a bicyclist in the Tour De France crests a mountain pass as he moves at 15km/h. At the bottom 4km/h farther, his speed is 75km/h

katen-ka-za [31]

For an uniformly accelerated motion, the following relationship can be used:
$2aS = v_f^2 -v_i^2$
where a is the acceleration, S the distance covered, vf the final speed and vi the initial speed.

Before using the formula, we need to convert everything into SI units.
The distance covered is:
$S=4 km=4000 m$
To convert the speed from km/h to m/s, let's keep in mind that
$1 km=1000 m$
$1h=3600 s$
so
$1 \frac{km}{h}= \frac{1000 m}{3600 s}= \frac{1}{3.6}$
is the conversion factor.
So the speeds are:
$v_i = 15 km/h \cdot \frac{1}{3.6}=4.17 m/s$
$v_f = 75 km/h \cdot \frac{1}{3.6}=20.83 m/s$

and so, now we can re-arrange the formula to find a, the average acceleration:
$a= \frac{v_f^2-v_i^2}{2S} = \frac{(20.83m/s)^2-(4.17m/s)^2}{2\cdot 4000 m}=0.05 m/s^2$

8 0

4 years ago

Which term is defined as long chains of carbon molecules?

cupoosta [38]

Atoms that’s the right answer

3 0

3 years ago

Read 2 more answers

The table lists the mass and charge of a proton and a neutron.

Olegator [25]

The gravitational force is much larger than the electrical force for any distance between the particles.

Explanation:

The gravitational force between two particles is given by:

$F=\frac{Gm_1 m_2}{r^2}$

where

G is the gravitational constant

m1, m2 are the masses of the two particles

r is the separation between the two particles

The electric force between two particles is given by:

$F=\frac{kq_1 q_2}{r^2}$

where

k is the Coulomb's constant

q1, q2 are the charges of the two particles

r is the separation between the two particles

In this problem, we are comparing the gravitational force and the electric force between a proton and a neutron.

We must immediately notice that the charge of the neutron is zero, since it is electrically neutral:

q = 0

This means that the electric force between the proton and the neutron is always zero, regardless of their distance. And therefore, since their masses is not zero (and the gravitational force is never zero), the correct answer is

The gravitational force is much larger than the electrical force for any distance between the particles.

Learn more about gravitational force:

brainly.com/question/1724648

brainly.com/question/12785992

About electrical force:

brainly.com/question/8960054

brainly.com/question/4273177

#LearnwithBrainly

4 0

3 years ago

Read 2 more answers

Muscular strength and muscular endurance are measured by the same test true or false