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makkiz [27]
1 year ago
7

Help due in 5 mins........

Physics
1 answer:
ivanzaharov [21]1 year ago
7 0

The first unknown ion is zinc ion and the second unknown element is Osmium.

<em>"Below is information on the rest of the missing spaces in the table"</em>.

<h3>Magnesium ion (Mg²⁺)</h3>

The atomic number is 12

The number of protons is 12

The number of neutrons is (24 - 12) = 12

The number of electrons is (12 - 2) = 10

The mass number is (proton + neutron) = 12 + 12 = 24

<h3>Silver ion (Ag⁺)</h3>

The atomic number is 47

The number of protons is 47

The number of neutrons is (108 - 47) = 61

The number of electrons is (47 - 1) = 46

The mass number is (proton + neutron) = 47 + 61 = 108

<h3>Sulfur ion (S²⁻)</h3>

The atomic number is 16

The number of protons is 16

The number of neutrons is (32 - 16) = 16

The number of electrons is (16 + 2) = 18

The mass number is (proton + neutron) = 16+ 16 = 32

<h3>First unknown element/ion</h3>

The atomic number is 30

The number of protons is 30

The number of neutrons is (66 - 30) = 36

The number of electrons  =  28

The mass number is 66

The ion is zinc ion = (Zn²⁺)

<h3>Second unknown element/ion</h3>

The atomic number is 76

The number of protons is 76

The number of neutrons is 114

The number of electrons  = 76

The mass number is (76 + 114) = 190

The name of this unknown element is Osmium.

Learn more about atomic number of elements here: brainly.com/question/6258301

#SPJ1

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Alana is skateboarding at 19 km/h and throws a tennis ball at 11 km/h to her friend Oliver who is behind her leaning against a w
NNADVOKAT [17]

The speed of the tennis ball is 8 km/h when Alana throws the ball behind at the speed of 11 km/h.

<h3>What is the frame of reference?</h3>

It is a point from where the motion is observed. The speed changes with the frame of reference.

For the person standstill on the sidewalk, If  Alana throw the ball in the front direction, The speed will be,

19+11 = 30 km/h

It Alana just leave the ball, the speed,

19 +0 = 19 km/h

If Alana throws the ball behind her at the speed of 19 km/h. The speed of the ball for a sidewalk observer,

19 +(-19 ) =  0 km/h

Thus, when Aana throw the ball behind the velocity will be negative,

So,

19 + (-11 ) = 8 km/h

Therefore, the speed of the tennis ball is 8 km/h when Alana throws the ball behind at the speed of 11 km/h.

Learn more about Frame of reference:

brainly.com/question/9820962

8 0
2 years ago
If the ankylosaurs starts running and accelerates at 1.3m/s^2 for 3 seconds how far does he make it before the velociraptor catc
sveta [45]

Acceleration is the change of velocity, and velocity is the change of distance. The opposite of finding change, or differentiation, is integration.

Acceleration = 1.3 m/s²

Velocity: ∫ 1.3 dx = 1.3x + c m/s

Distance: ∫ 1.3x dx = 1.3x²/2 + c m

Distance run: 1.3*3²/2 = 5.85 m

<em>What</em><em> </em><em>bad</em><em> </em><em>thing</em><em> </em><em>happened</em><em>?</em>

7 0
3 years ago
A car weighing 9800 N travels at 30 m/s. What braking force brings it to rest in 100m? In 10 m?
Svetach [21]

As per kinematics equation we know that

final speed of the car = 0 m/s

initial speed is given as 30 m/s

distance moved = 100 m

now we have

v_f^2 - v_i^2 = 2 a d

0 - 30^2 = 2(a)(100)

a = - 4.5 m/s^2

now braking force is given as

F = ma

now for mass we know that the weight of car is

W = mg = 9800 N

so mass of car is

m = 1000 kg

now we have

F = 1000(4.5) = 4500 N

Part b)

Again we have

final speed of the car = 0 m/s

initial speed is given as 30 m/s

distance moved = 10 m

now we have

v_f^2 - v_i^2 = 2 a d

0 - 30^2 = 2(a)(10)

a = - 45 m/s^2

now braking force is given as

F = ma

mass of car is

m = 1000 kg

now we have

F = 1000(45) = 45000 N

4 0
3 years ago
Give an example of a scientific hypothesis. Explain how you would test it, and how it could be falsified (proved untrue).
kaheart [24]

my hypothesis is that If you drop a piece of buttered toast, it will land butter side down.


I tested it by dropping 10 pieces of buttered toast off the table and noted on which side it landed


It could be falsified cause I just made all of this up. In essence, it's like flipping a coin, 50/50 chance so I could say that 5 landed butter up and 5 landed butter down.

8 0
3 years ago
Referring to the sketch of a planet around the sun, Area A is three times that of Area B. Compare the times required for the pla
charle [14.2K]

Answer:

tA is three times tB

Explanation:

4 0
3 years ago
Read 2 more answers
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