The odometer gauge indicates the ________________.

Answers

Answer 1

Answer: The odometer gauge indicates the ________________.

the distance traveled.

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Which concept represents most encompassing aspect of our lives

Answers

the most ecompassing aspect of our lifes is emotional health

How to find initial velocity

Answers

Answer:

Velocity= Distance divided by time divided by degree or direction.

Explanation:

Speed=DIstance divided by time

1.Initial Velocity Formula Questions:
2.Answer: The initial velocity can be found using the formula:
3.vi = vf - at.
4.Answer: The initial velocity can be found using the formula:
5.vi = vf - at.

Solve the problem.The Bay area of California was shaken by an earthquake on October 17, 1989. The epicenter was located at Loma Prieta. The diameter of the earthquake's horizontal waves that shocked the area measured about 120 miles. How many square miles were affected by this earthquake?

Answers

As the shock waves travel in concentric outward circles from the epicenter, and the diameter is measured 120 miles,
area of a circle =πr*r

d=120
r=120/2r=6060*60=36003600*π=11309.734
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a bullet of mass m is fired into a block of mass m that is at rest. the block, with the bullet embedded, slides distance d across a horizontal surface. the coefficient of kinetic friction is μk.

Answers

The expression for the bullet's speed vbullet is $v=\sqrt{(2\mu_k (m+M)gd)/(m)}$ and the speed of a 9.0 g bullet is v=16.8 m/s

Explanation:

A bullet of mass m is fired into a block of mass m that is at rest. the block, with the bullet embedded, slides distance d across a horizontal surface. the coefficient of kinetic friction is μk.

The initial kinetic energy of the bullet is given by

$K_i = (1)/(2)mv^2$

where

m is the mass of the bullet

v is the initial speed of the bullet

The expression for the bullet's speed vbullet is

$F=\mu_k (m+M) g$

where

$\mu_k$ is the coefficient of kinetic friction

g is the acceleration of gravity

The work done by the force of friction is

$W=-Fd = -\mu_k (m+M)g d$

where d is the displacement of the block+bullet.

Because the final kinetic energy is zero (the bullet with the block comes at rest), we can write:

$W=K_f - K_i = -K_i$

And so

$-\mu_k (m+M) g d = -(1)/(2)mv^2$

By solving for v, the solution for the bullet speed:

$-\mu_k (m+M) g d = -(1)/(2)mv^2\nv=\sqrt{(2\mu_k (m+M)gd)/(m)}$

The speed of a 9.0 g bullet that, when fired into a 12 kg stationary wood block causes the block to slide 5.4 cm across a wood table. Assume that k=0.20.

We have:

the mass of the bullet, m = 9.0 g = 0.009 kg

the mass of the block, M = 12 kg

the distance covered by the block+bullet, d = 5.4 cm = 0.054 m

the coefficient of friction, $\mu_k = 0.20$

the acceleration of gravity, $g = 9.8 m/s^2$

By substituting, we got

$v=\sqrt{(2 (0.20) (0.009 kg+12 kg)(9.8 m/s^2)(0.054 m))/(0.009 kg)}=16.8 m/s$

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uk=2m*the normal force
the distance d is needed only if you were asked about work

The Ptolemaic theory of the universe was disproved bya. Descartes.
b. Kepler.
c. Copernicus.
d. Newton.

Answers

The Ptolemaic theory of the universe wasdisproved by Nicolaus Copernicus (1473–1543), letter C and followed by JohannesKepler (1571–1630). Geocentrictheory suggested that the Sun and moon orbited Earth, and the rest of theplanets orbited the Sun is Heliocentric theory. Heliocentric theory of NicolausCopernicus during the Scientific Revolution on 17th and 18thcentury while Geocentric theory was proposed by Ptolemy (AD 150) and Aristotle.Today, we believe more on the Heliocentric theory and it has been proven aswell.

Using the periodic table and your knowledge of atomic structure. cobalt (Co) and nickel (Ni) have almost identical atomic mass numbers. Comparing nickel and cobalt from the periodic table, which statement best describes the atoms?A. Nickel has one more neutron.

B. Both atoms will have the same number of protons.

C. Both atoms will have the same number of neutrons.

D. Cobalt has one less proton.

Answers

Answer:

Cobalt has one less proton.

Explanation:

Nickel and Cobalt both has almost same atomic mass number approximately 59 but has different atomic number.

Number of proton and electrons in an atom is given by,

Number of proton = Number of electron = atomic number of an atom.

Number of neutron in an atom is given by,

Number of neutrons = Atomic mass number - atomic number

Case 1: Cobalt

Atomic mass number = 59

Atomic number = 27

Number of proton and electrons in Nickel is given by,

Number of proton = Number of electron = atomic number of an atom.

Number of proton = 27

Number of neutron in an atom is given by,

Number of neutrons = Atomic mass number - atomic number

Number of neutrons = 59 - 27

Number of neutrons = 32

Case 2: Nickel

Atomic mass number = 59

Atomic number = 28

Number of proton and electrons in Nickel is given by,

Number of proton = Number of electron = atomic number of an atom.

Number of proton = 28

Number of neutron in an atom is given by,

Number of neutrons = Atomic mass number - atomic number

Number of neutrons = 59 - 28

Number of neutrons = 31

Cobalt has one less proton.

Thus, Option D is correct.

Answer: The correct answer is option D.

Explanation:

Cobalt and Nickel both are transition metals which means that their last electron enter d-orbitals.

These two elements have similar atomic masses but differ in the atomic number.

Atomic number is equal to the number of protons or electrons present in that element.

Atomic number = number of protons = number of electrons

Atomic Mass is the sum of protons and neutrons in an element

Atomic mass = Number of protons + Number of neutrons

For Cobalt:

Atomic Number = 27

Number of protons = 27

Atomic mass = 59

Number of neutrons = 59 - 27 = 32

Hence, Number of protons in this element is 27 and number of neutrons are 32.

For Nickel:

Atomic Number = 28

Number of protons = 28

Atomic mass = 59

Number of neutrons = 59 - 28 = 31

Hence, Number of protons in this element is 28 and number of neutrons are 31.

From the above information, it is visible that cobalt has one less proton that the nickel.

Hence, the correct answer is option D.

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