3. A player catches a ball. The action force is the impact of the ball against the player's glove. The
reaction force is...
a. The force the glove exerts on the ball
b. The player's grip on the glove
c. The friction of the ground on the player's shoes
Why???

Answer:

um

Explanation:

Answer: Dang thats tough g but u did it

Explanation:

Answer:

Yes becacuse it will never run out. The sun is there and it soakes the light up to create energy Solar is a renewable resourse.

Taking the downward direction as positive

Stone 1:

Initial velocity (u) = 0 m/s

Acceleration (a) = 10 m/s²

Time taken to reach the ground (t) = t seconds

Distance covered (s) = 20 m

Stone 2:

Initial velocity (u) = u m/s

Acceleration (a) = 10 m/s²

Time taken to reach the ground (t) = (t-1) seconds  

[where t is the time taken by stone 1]

Distance covered (s) = 20 m

__________________________________________________________

Stone 1:

Using the second equation of motion:

s = ut + 1/2*at²

replacing the variables for Stone 1

20 = (0)(t) + 1/2(10)(t)²

20 = 5t²

Dividing both sides by 5

t² = 4

Taking the square root of both the sides

t = 2 seconds

Hence, Stone 1 reaches the ground in 2 seconds

Stone 2:

The time taken by Stone 2 to reach the ground depends on the time taken by stone 1. Since we defined the time taken by stone 2 as:

Time taken by Stone 2 = (Time taken by Stone 1) - 1

replacing the values:

Time taken by Stone 2 = 2 - 1

Time taken by Stone 2 = 1 second

Hence, Stone 2 will reach the ground in 1 second

__________________________________________________________

According to the second equation of motion:

s = ut + 1/2 at²

replacing the values for Stone 2

20 = (u)(1) + 1/2(10)(1)²

20 = u + 5

u = 15 m/s

Therefore, the Stone 2 is thrown at a velocity of 15 m/s downwards

Answer:

D. upright, same size as object, virtual

Explanation:

it is a plane mirror, it has no changes

The characteristics of the image produced by the object placed in front of a plane mirror will be upright, the same size as the object, and virtual.

The law of reflection states that when a ray of light reflects back from a surface the angle of incidence of light on a surface is equal to the angle of reflection.

The image produced by an object in front of a plane mirror will be upright, the same size as the object, and virtual.

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Answer:

Free points

Explanation:

Answer:

wdym??

Explanation:?

Answer:

Fₓ = maₓ

Fy = may

Explanation:

The Newton's Second Law tells us about the force. It says whenever an unbalanced force is applied to a body, an acceleration is produced in that body. The direction of this acceleration is in the direction of the force itself. Hence, the law can be written as:

F = ma

where,

F = Unbalanced force

m = mass of body

a = acceleration magnitude

We, can write two equations separately for x-direction and y-direction as follows:

Fₓ = maₓ

Fy = may

where,

Fₓ = x-component of unbalanced force

aₓ = x-component of acceleration

Fy = y-component of unbalanced force

ay = y-component of acceleration

This question is incomplete, the complete question is;

An engineer is tasked with developing a model to study a cylindrical heat exchanger in a steam system. The prototype cylinder is 2.54 cm in diameter and the steam properties are: velocity = 30 m/s; density = 0.6 kg/m³; and absolute viscosity = 1.197 X 10⁻⁵ N-s/m², respectively. The model is going to be tested in a water tunnel where the water temperature is 20°C and the velocity is 3 m/s

a) what is the prototype Reynolds number, based on using the cylinder diameter as the characteristic length?

b) what should be the diameter of the model be to ensure dynamic similitude?

Answer:

a) the prototype Reynolds number is 38195.488

b) 0.01278 m or 1.278 cm should be the diameter of the model be to ensure dynamic similitude

Explanation:

Given that;

1 prototype ; d = 2.54 cm = 0.0254 m, Vp = 30 m/s, Sp = 0.6 kg/m³, Up = 1.197 × 10⁻⁵ N-s/m²

Model{ water at 20°C}; dm = ?, Vm = 3 m/s, Pm = 998.23 kg/m³, Um = 1.002 × 10⁻³ N-s/m²

a) what is the prototype Reynolds number,

to calculate prototype Reynolds number we use the expression;

(Re)p = SpVpdP / Up

we substitute our value

(Re)p =  (0.6 × 30 × 0.0254) / 1.197 × 10⁻⁵

(Re)p = 38195.488

Therefore the prototype Reynolds number is 38195.488

b)

what should be the diameter of the model be to ensure dynamic similitude?

i.e dm = ?

so dynamic similarity [ viscous flow]

(Re)m = (Re)p

[PmVmdm / Um] = [SpVpdP / Up]

we substitute

[998.23 × 3 × dm / 1.002 × 10⁻³] = (0.6 × 30 × 0.0254) / 1.197 × 10⁻⁵

2994.69dm / 1.002 × 10⁻³ = 38195.488

2994.69dm = 38.2718

dm = 38.2718 / 2994.69

dm = 0.01278 m or 1.278 cm

Therefore 0.01278 m or 1.278 cm should be the diameter of the model be to ensure dynamic similitude

Answer:

4.24nm

0.385eV

Explanation:

Maximum wavelength (λmax) :

λmax = ( hc) /Φ

h = plancks constant = 6.63 * 10^-34

c = speed of light = 3*10^8

1ev = 1.6 * 10^-19

Φ = 2.93eV = 2.93* (1.6*10^-19) = 4.688*10^-19

λmax = [(6.63 * 10^-34) * (3 * 10^8)] / 4.688*10^-19

λmax = 19.89 * 10^-26 / 4.688*10^-19

λmax = 4.242 * 10^-7 m

λmax= 4.24nm

B.)

E = hc / eλ eV

λ = 3.75nm = 3.75 * 10^-7m = 375 *10^-9

E = (6.63 * 10^-34) * (3 * 10^8) / (1.6 * 10^-19) * (375 * 10^-9)

E = 19.89 * 10^-26 / 600 * 10^-28

E = 0.03315 * 10^-26 + 28

E = 0.03315 * 10^2

E = 3.315 eV

Stopping potential : (3.315 eV - 2.93eV) = 0.385eV

Answer:

Liquid

Explanation:

A liquid will fill its container and are neither tightly packed like a solid nor very loosely packed like a gas.

Answer: Its Solid

Explanation:

Answer:

youre very welcome can i get brainlist

Explanation:

The ball rolls off the table with speed v from a height of 0.35 m, so that it covers a horizontal distance x with height y at time t of

x = v t

y = 0.35 m - 1/2 g t ²

where g = 9.80 m/s² is the magnitude of the acceleration due to gravity.

Solve for t when y = 0, i.e. the time it takes for the ball to reach the ground:

0 = 0.35 m - 1/2 g t ²

t ² = (0.70 m) / g

t ≈ 0.267 s

Now solve for v given that the ball falls 3 m away from the table:

3 m = v (0.27 s)

v = (3 m) / (0.27 s)

v ≈ 11.2 m/s

Answer:

c

Explanation:

1- First electrons are transferred.

2-The ions are formed

3-The ions are attracted to form the compound

Answer:

answer is c.........

Explanation:

Answer: They were randomly preassigned to the condition of social rejection.

Explanation:

Humans are said to be social beings which means that we survive in part due to our social connections. The experiment from the video was meant to research and evaluate what happens to human beings when they experience social rejection instead of acceptance.

There were four participants being Alexandria, Mike, Brittany and Michael. For the purpose of the research, Brittany and Michael were preassigned to the condition of social rejection whilst the other two were preassigned to acceptance with the goal being to observe the reactions of the parties after they find that they were either accepted or rejected.

Attached is the transcript to the video of the research summary.

Answer:

O C. Light energy

Explanation:

it conducts energy in it and is an energy itself.

Answer:

Resistance decreases the flow of current in a circuit.

EXPLANATION:

The resistance of an electrical circuit is defined as the opposition to the flow of current in that particular circuit.

From Ohm's law, we know that current flowing  through a wire I =

Here,V is the potential across the two ends of a conductor or wire, and R is the resistance of that wire.

Hence, more is the resistance, the less will be the current flow in the current.

Answer:

Explanation:

Pressure on the hydraulic system is expressed as;

Pressure = Force/Area

Given

Force on the fluid = 400N

Area = 0.001m²

Pressure in the fluid = 400/0.001

Pressure in the fluid = 400,000N/m²

1N/m² = 0.001kPa

400,000N/m² = x

x = 400,000 × 0.001

x = 400kPa

Hence the pressure in kPa is 400kPa

b) Using the formula;

Pa = Pb

Fa/Aa = Fb/Ab

Pa = Fb/Ab

Fb = PaAb

Fb = 400,000(0.2)

Fb = 80,000N

Hence the magnitude of the force exerted on the load bearing piston by the hydraulic fluid is 80,000N

Image is missing, so i have attached it

Answer:

Tension in back wire = 24.5 N

Explanation:

let the tension in the back wire be Tₒ

let the tension in the front wire be T

Applying static equilibrium in the vertical direction, we have:

T + Tₒ = (5 × 9.8) + (2.5 × 9.8)

T + Tₒ = 73.5

Where Tₒ = (2.5 × 9.8) = 24.5 N

Thus, Tension in back wire = 24.5 N

The tension in the back wire equals 24.5 N.

We can arrive at this answer with the static equilibrium formula, for that, let's consider that the tension in the back wire is represented by the letter "t," while the tension in the front wire is represented by the letter "T."

Therefore, we can use the following formula:

[tex]t= W*g\\t= 2,5*9.8\\t= 24.5 N[/tex]

In this case, the letter "W" refers to the tool weight, while the letter "g" refers to gravity.

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Answer:

The peak value of the Magnetic field is 6.67 x 10⁻⁸ T

Explanation:

Given;

peak value of the electric-field, E₀ = 20 V/m

The peak of the magnetic field, B₀ = ?

The peak value of the magnetic field is given by;

B₀ = E₀/C

Where;

C is the speed of light = 3 x 10⁸ m/s

Substitute the givens and solve for B₀

B₀ = E₀ / C

B₀ = (20) / (3 x 10⁸)

B₀ = 6.67 x 10⁻⁸ T

Therefore, the peak value of the Magnetic field is 6.67 x 10⁻⁸ T

B₀ =

Answer:D

Explanation: a p e x

Answer:

stamina

Explanation:

because your lungs are expanding when you run, it'll help you learn how to control your breathing, it'll help you in other situations if you have to run.

Answer:

c. 7.7 eV

Explanation:

The computation of the photon emitted is shown below:

Given that

From level 1 to level 3, the energy absorbed by electrons is 11.8eV

And, when from level 3 to level3, the energy released by electron is 4.1eV

So, from level 2 to level 1, the energy released is

= 11.8 - 4.1

= 7.7

= 7.7eV

Hence, the third option is correct

The same is to be considered

And, the other options are wrong

Answer:

196200N

Explanation:

Fg=mg

Fg=?

m=20000

g=9.81

Fg= (20000kg)(9.81[tex]m/s^{2}[/tex])=196200N

Answer:

True

Explanation:

Answer:

The first object is experiencing a larger centripetal force because its radius is smaller compared to the second object.

Explanation:

Given;

radius of the first object, r₁ = 10 cm = 0.1 m

radius of the second object, r₂ = 0.2 m

let the mass of the two objects, = m

let the speed of the two objects = v

The centripetal force of the first object is given by;

[tex]F_c_1 = \frac{mv^2}{r_1} \\\\F_c_1 = \frac{mv^2}{0.1}\\\\F_c_1 = 10mv^2[/tex]

The centripetal force of the second object is given by;

[tex]F_c_2 = \frac{mv^2}{r_2} \\\\F_c_2 = \frac{mv^2}{0.2}\\\\F_c_1 = 5mv^2[/tex]

Therefore, the first object is experiencing a larger centripetal force because its radius is smaller compared to the second object.

The major parts that are found in the Electric generators are Armature,  Battery,  Permanent magnet, Brushes and Slip rings.

The given problem is based on the concept and fundamentals of Electric generator. An electric generator is a machine which converts the mechanical energy into the electrical energy. Such that these energy is utilized for transmission and distribution over the power lines to domestic and commercial uses.

The major components of an electric generator are as follows:

Thus, we can conclude that the major parts that are found in the electric generators are Armature,  Battery, Permanent Magnet, Brushes and Slip rings.

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Answer:

The speed of the sound wave on the string is 545.78 m/s.

Explanation:

Given;

mass per unit length of the string, μ = 4.7 x 10⁻³ kg/m

tension of the string, T = 1400 N

The speed of the sound wave on the string is given by;

[tex]v = \sqrt{\frac{T}{\mu} }[/tex]

where;

v is the speed of the sound wave on the string

Substitute the given values and solve for speed,v,

[tex]v = \sqrt{\frac{T}{\mu} }\\\\v = \sqrt{\frac{1400}{4.7*10^{-3}} }\\\\v = \sqrt{297872.34}\\\\v = 545.78 \ m/s[/tex]

Therefore, the speed of the sound wave on the string is 545.78 m/s.

Answer:

Carry energy and follow a pattern

Both mechanical and electromagnetic waves will carry energy and follow a pattern.

A wave is defined as a disturbance that is formed in a medium and that carries energy.

Here,

A Venn diagram is given and the Venn diagram represents the comparison between mechanical waves and electromagnetic waves.

The main characteristics of mechanical and longitudinal waves are:

Mechanical waves require a medium in order to propagate such as water or air.

Electromagnetic waves differ from the mechanical waves such that the electromagnetic waves do not require a medium for propagation.

Therefore we can say that the electromagnetic waves will propagate through space whereas the mechanical waves will not travel through space, they need a medium.

Also, we know that waves carry energy. So, both the mechanical waves and electromagnetic waves will carry energy with them.

So, the center section of the Venn diagram will be carry energy and follow a pattern.

Hence,

Both mechanical and electromagnetic waves will carry energy and follow a pattern.

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Answer:

v = 0.119 m/s

Explanation:

Given that,

Force constant, k = 3200 N/m

Mass, m = 65 kg

Amplitude of her oscillation is 1.7 cm i.e. 0.017 m

We need to find her maximum speed during the measurement. Let it is v. It is given by the formula as follows :

[tex]v=\sqrt{\dfrac{k}{m}}A[/tex]

Where,

A is the amplitude

[tex]v=\sqrt{\dfrac{3200}{65}}\times 0.017 \\\\v=0.119\ m/s[/tex]

So, the maximum speed is 0.119 m/s.

The maximum speed of the astronaut during the measurement is 0.12 m/s.

The given parameters;

The maximum speed of the astronaut during the measurement is calculated as follows;

[tex]v = \omega A\\\\v = \sqrt{\frac{k}{m} } \times A\\\\v = \sqrt{\frac{3200}{65} } \times 0.017\\\\v = 0.12 \ m/s[/tex]

Thus, the maximum speed of the astronaut during the measurement is 0.12 m/s.

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