PHYSICS HIGH SCHOOL

Cations have fewer _____ than _____.a. neutrons; protons
b. protons; neutrons
c. electrons; protons
d. protons; electrons

Answers

Answer 1
Answer:

Answer:

C.Electrons,protons.

Explanation:

Cations:

 When metal loos it electrons then it will form cations.

Ex:Na^(+1)

Anion:

When metal gain electron then it will from anions.

Ex:F^(-1)

So from above we can say that ,the cations have fewer electrons than protons.Protons is also called as positive charged ions and electron are also called negatively charge ions.

SO the option is C is correct.
Answer 2
Answer: Cations are positively charged ions. And for positive charged ions, it means the positive charges, protons, are more than the negative charges, the electrons.

Therefore Cations have fewer electrons than protons.

So the answer is:    c. electrons; protons. 

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A student kicks a football vertically upwards, causing the football to reach a maximum height of 40.0m before falling back to the ground. Determine all unknowns and answer the following questions. Neglect drag and the initial height and horizontal motion of the football.A) With what speed was the football kicked?
B) What was the football's total flight time?

Answers

Answer:

A. 28 m/s

B. 5.72 s

Explanation:

The following data were obtained from the question:

Maximum height (h) = 40 m

Acceleration due to gravity (g) = 9.8 m/s²

A. Determination of the initial velocity.

Maximum height (h) = 40 m

Acceleration due to gravity (g) = 9.8 m/s²

Velocity at maximum height (v) = 0 m/s

Initial velocity (u) =.?

v² = u² – 2gh (Ball is going against gravity)

0² = u² – (2 × 9.8 × 40)

0 = u² – 784

Collect like terms

0 + 784 = u²

784 = u²

Take the square root of both side

u = √784

u = 28 m/s

Thus, the ball was kicked with a velocity of 28 m/s

B. Determination of the time of flight.

We'll begin by calculating the time taken to reach the maximum height. This can be obtained as follow:

Velocity at maximum height (v) = 0 m/s

Initial velocity (u) = 28 m/s

Time taken to reach the maximum height (t) =?

v = u – gt (Ball is going against gravity)

0 = 28 – 9.8t

Rearrange

0 + 9.8t = 28

9.8t = 28

Divide both side by 9.8

t = 28/9.8

t = 2.86 s

Finally, we shall determine the the time of flight as follow:

Time taken to reach the maximum height (t) = 2.86 s

Time of flight (T) =?

T = 2t

T = 2 × 2.86

T = 5.72 s

Therefore, the time of flight for the ball is 5.72 s

What Makes enzymes for starch, protein and fat breakdown

Answers

The type of enzyme that are synthesized in an environment where an operon codes for enzymes that synthesize a protein from precursor amino acid molecules are the repressible enzymes. It binds to the operator and blocks attachment of RNA polymerase to the promoter, preventing transcription of the genes.

A water balloon is launched with a speed of 40 m/s at an angle of 60 degrees to the horizontal. What is the vertical component of the velocity? a 40 m/s
b 34.6 m/s
c 0 m/s
d 20 m/s

Answers

Vertical component = 40 m/s x sin(60) = 34.6 m/s

Answer: b. 34.6 m/s

The vertical component of velocity is approximately 34.64 m/s. Therefore option B is correct.

When an object is launched at an angle, its velocity can be divided into horizontal and vertical components. The vertical component is found by multiplying the initial velocity by the sine of the launch angle.

To find the vertical component of the velocity, we use trigonometric relationships based on the given launch angle of 60 degrees and initial velocity of 40 m/s.

The vertical component \rm (\(v_y\)) can be calculated as \rm \(v_y = v \cdot \sin(\theta)\), where v is the initial velocity and \(\theta\) is the launch angle.

Calculation:

Given:

Initialvelocity (v) = 40 m/s

Launch angle (\(\theta\)) = 60 degrees

Vertical component:

\rm \[ v_y = v \cdot \sin(\theta) \n= 40 \, \text{m/s} \cdot \sin(60^\circ) \approx 34.64 \, \text{m/s} \]

In this case, with an initial velocity of 40 m/s and a launch angle of 60 degrees, the vertical component of velocity is approximately 34.64 m/s (option b).

Know more about initial velocity:

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Two wires are used to suspend a sign that weighs 500 N. The two wires make an angle of 100° between each other. If each wire is exerting an equal amount of force how much force does each wire exert?

Answers

The force each wire exert will be "390.62 N".

The given values are:

Weight,

  • mg = 500 N

Angle,

  • θ = 100°

As we know,

The sum of vertical forces = 0

then,

→ \Sigma Fy = 0

Now,

→ F Cos (50) +F Cos (50) = mg

By substituting the value, we get

→                   2F Cos (50) = 500

→                                 F = (500)/(2 Cos (50))

→                                     = (500)/(2(0.64))

→                                     = 390.62 \ N  

Learn more:

brainly.com/question/6666347

What is the period and frequency of a water wave if 4.0 complete waves pass a fixed point in 10 seconds

Answers

The correct answer for this question is this one: C) 2.5s. The period and frequency of a water wave if 4.0 complete waves pass a fixed point in 10 seconds is that 2.5 s

Here are the following choices:
A) 0.25s 
B) 0.40s 
C) 2.5s 
D) 4.0s

A baseball player runs 27.4 meters from thebatter’s box to first base, overruns first base by
3.0 meters, and then returns to first base.
Compared to the total distance traveled by the
player, the magnitude of the player’s total
displacement from the batter’s box is
(1) 3.0 m shorter (3) 3.0 m longer
(2) 6.0 m shorter (4) 6.0 m longer

Answers

Distance is a measure of the length of space covered over a certain period of time. While displacement is the change in position of an object from its starting point. Displacement is 6.0 meters shorterthan distance.

  • Starting position = batter'box

  • Batter's box to first base = 27.4 meters

  • Distance beyond first base = 3 metres

  • Final position = first base

Total distance covered :

(Batter's box - > first base) + (beyond first base) + (return to first base)

  • (27.4 + 3 + 3) = 33.4 meters

Total Displacement :

(Batter's box - > first base) + (beyond first base) - (return to first base)

  • (27.4 + 3 - 3) = 27.4 meters

Difference in magnitude of Distance and Displacement :

  • 33.4 - 27.4 = 6.0 meters

Therefore, displacement is 6m shorter

Learn more :brainly.com/question/8283882

Answer:

(2) 6.0 m shorte.

Explanation:

Total distance = Distance from batter’s base to first base + Distance covered in overrunning + Distance covered in returning to first base  

Total Distance = 27.4 + 3 + 3 = 33.4 m

Total displacement = Displacement from batter’s base to first base + Displacement covered in overrunning + Displacement covered in to returning first base  

The 2nd and 3rd term will have same magnitude but opposite direction so, they will cancel out each other. Hence,  

Total Displacement = 27.4 m  

Hence, displacement will be 6.0 m shorter than distance.

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