If a ball was thrown upward at 46.3 m/s how long would the ball stay in the air

Answers

Answer 1

Answer: $V = Vo + a.t$

The ball is against the vector of gravity. Then, the gravity will be negative.

$0 = 46,3 + (-9.8).t \n t = (46.3)/(9.8) \n t \approx 4.72$

The ball will stop in the air after approx. 4.72 seconds. And will take the same time to hit the ground.

It will stay approx. 9.44 seconds in the air.

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John can travel to atlanta 560 miles in 9 hours what is his velocity

The heat capacity of a sample should be divided by which quantity to find the specific heat capacity?

Answers

The heat capacity of a sample should be divided by the number of moles of a substance to find the specific heat capacity of that substance. For example, the specific heat capacity of methane is 4.475 kJ/kg-K.

What nondestructive testing method requires little or no part preparation, is used to detect surface or near surface defects in most metals, and may also be used to separate metals or alloys and their heat-treat conditions?

Answers

Answer:Eddy current inspection.

Explanation:EDDY CURRENTS are currents which are produced as a result of changes observed within the magnetic field of an electric circuits. Eddy currents are also called Foucault's Currents. Eddy currents can heat up objects without actually coming in contact with that object.

Eddy current testing or inspection ( ECT) is an electromagnetic testing/inspection methods applied in nondestructive testing (NDT).

Nondestructive testing utilises

Electromagnetic induction to detect and describe surface and sub-surface issuess in conductive materials according to the features of the issues or problems in the conductive material.

Answer:Eddy current testing method.

Explanation:

Non destructive testing methods are techniques which makes use of electromagnetic radiation to examine and detect anomalies in a wide variety of articles( metallic or non - metallic) without causing any changes to it. Non destructive testing is used in science and technology fields such as:

- petroleum engineering,

-mechanical engineering,

- forensic engineering,

- aeronautical engineering and

- medicine.

Types of non destructive testing includes

Eddy current testing, magnetic- particle testing, liquid penetrant testing, radiographic testing, ultrasonic testing, and visual testing.

Eddy current testing method is used to detect surface or near surface defects in most metals, and may also be used to separate metals or alloys and their heat-treat conditions.

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.

Need help! Photo says all! Will mark brainliest :)

Answers

Answer:

number 2!

Explanation:

Answer:

2s to 4s

Explanation:

Since the graph measures acceleration over time, when the line does not move up or down is when you can see a constant velocity.

A ball rolls horizontally off a table of height 0.6 m with a speed of 9 m/s .How long does it take the ball to reach the ground?

Answers

The distance an object falls from rest is

   D = (1/2) (gravity) (time)² .

If the ball falls 0.9 meter, then

   0.9 m = (1/2) (9.8 m/s²) (time)²

Divide each side
by 4.9 m/s² :           0.9 m / 4.9 m/s² = time²

Take the square root
of each side: time = √(0.9/4.9) sec²

      =    0.43 second .

The horizontal motion of the ball makes no difference.
It doesn't matter whether the ball rolls off of a table,
gets dropped from a hand, or shot horizontally from
a gun. It still hits the floor or the ground 0.43 sec later.

Answer:

.35 s

Explanation:

x = v(i)t + 1/2at^2

gravity = 9.81 m/s^2 = a

.6 m = 1/2at^2

(.6 m) * 2 = (1/2at^2)*2

1.2 m = at^2

(1.2 m)/a = (at^2)/a

0.12 s^2 = t^2

sqrt(.12 s^2) = sqrt(t^2)

.35 s = t

As Derrick is driving around town, he stops at a red-light. When the light turns green, he takes off and travels212m in 6.7 seconds. What is his average acceleration?

Answers

Answer:

31.6

Explanation:

velocity÷ time

212 ÷ 6.7 = 31.6m/s

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