7 principles of Exercise and Sports Training

You are riding your bike at 5 m/s. In order to avoid hitting a child that has run into the street, you slam on your brakes and slow to a stop. It takes you  1.5 seconds to fully stop. Acceleration will be  3.33 [tex]m/s^{2}[/tex]

The branch of physics that defines motion with respect to space and time, ignoring the cause of that motion, is known as kinematics. Kinematics equations are a set of equations that can derive an unknown aspect of a body’s motion if the other aspects are provided.

given

speed = 5 m/s

time = 1.5 seconds

using

v = u + at

0 = 5 + a ( 1.5 )

a = -5 / 1.5

 = 3.33 [tex]m/s^{2}[/tex]

Acceleration will be  3.33 [tex]m/s^{2}[/tex]

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So, the power rating of that LED light bulb is 9 Watt.

Hi ! I will answer your question. This material is about electricity where You are instructed to calculate the rated power of a lamp. Always remember, the power required by the lamp must also be at least the same as the power from the mains so that the light is not too dim or the lamp does not explode.

In this question, the formula used is the formula for calculating power, which is the product of the voltage and current flowing. It can be seen mathematically as below:

[tex] \boxed{\sf{\bold{P = V \times I}}} [/tex] Or

[tex] \boxed{\sf{\bold{P = \frac{V^2}{R}}}} [/tex]

With the following condition :

We know that :

What was asked :

Step by step :

[tex] \sf{P = V \times I} [/tex]

[tex] \sf{P = 18 \times 0.5} [/tex]

[tex] \boxed{\sf{P = 9 \: Watt}} [/tex]

So, the power rating of that LED light bulb is 9 Watt.

Explanation:

Explanation: The speed of light in a vacuum is 3⋅108 m/s . We can now convert to a more appropriate symbol, such as the nanoseconds. So, it will take light approximately 333

200,000 kilometers per secondrefractive index of 1.5).

Answer:

30,000dB

Explanation:

30,000dB because 30 multiplied by a factor of 1000 is 30,000

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Answer:

b and d

Explanation:

Answer:

my answer is letter b ithink

Answer:

The uneven heating of Earth by the sun causes the climate to be warm and dry at the equator and cold and wet toward the poles. The angle of sunlight is different at different latitudes, which causes the climate to be warm at the equator and colder toward the poles.

Explanation:

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Explanation:

The sulphur atom has 6 electrons in the outermost shell, and its valency could be 6. But it is easier for sulphur to gain two electrons instead of losing six electrons. Hence, its valency is determined by subtracting six electrons from the octet and this gives a valency of two for sulphur.

[tex] \frac{4577}{7 \times (80 - ( - 12))} \\ \frac{4577}{7 \times92 } \\ \frac{4577}{644} \\ = 8.5g[/tex]

Answer:

0

Explanation:

Here it's given that the weight of the box is 4N and it slides across a rough table for a distance of 2m . And we are interested in finding out the work done by the weight of the block. Firstly we know that , Work done is ,

[tex]\rm\longrightarrow \pink{ Work\ = \ F.s = |F||s|cos\theta} [/tex]

where

Therefore ,

[tex]\rm\longrightarrow Work = (4N)(2m)(cos\theta) [/tex]

Here the angle between the displacement and force is 90° , and value of cos90° is 0 , therefore,

[tex]\rm\longrightarrow Work = 8N-m (0)\\[/tex]

[tex]\rm\longrightarrow \underline{\boxed{\rm\blue{Work = 0 }}}[/tex]

The work done by the weight of the box is zero. The correct answer is zero. The correct option is (E).

Given:

Weight of the box = 4.00 N (acting downward)

Distance = 2.00 m

The angle between force and displacement, θ = 90°

Using the formula for work:

Work (W) = Force × Distance × cos(θ)

Since the angle θ is 90 degrees and cos(90 degrees) = 0.

The work done by the weight of the box is:

W = Force × Distance × cos(90)

W = 4.00 × 2.00 × 0

W = 0 J

Therefore, the work done by the weight of the box is zero. The correct option is (E).

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Answer:

A meteorologist is a scientist who studies weather Explanation:

A meterologist is a scientist who studies the weather condition of an environment.

A meteorologist is a scientist that specifies in the act of understanding and forecasting the atmospheric condition or weather of the Earth surface.

The branch of science that studies weather is called meteorology and a meterologist uses several techniques and tools to explain weather.

Therefore, a meterologist is a scientist who studies the weather condition of an environment.

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Friction is the force that opposes motion.

The term friction refers to the force that hinders the movement of a surface over another. The frictional force depends on the nature of the surfaces in contact.

1) The two forces acting on the ball during the frictional force are the forward force and the frictional force.

2) The ball takes more time to roll down the incline in the presence of the cloth because of the increase in friction of the surface.

3) The students repeated the investigation there times in order to ensure accuracy of the results.

4) The energy of the ball changes from potential energy at the top of the ramp to kinetic energy as it rolls down the ramp.

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In celestial mechanics, escape velocity or escape speed is the minimum speed needed for a free, non-propelled object to escape from the gravitational influence of a primary body, thus reaching an infinite distance from it.

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Answer:

Energy by definition is the property of matter that involves interactions with molecules, in order to perform an action.

Explanation:

They're many different types of energy, a few of them are...

. Thermal energy
. Solar energy
. Chemical energy
. Kinetic energy
. Potential energy
. Mechanical energy to name a few...

All of these specific energies involve the interaction of molecules which are used for different things and can be converted from one type of energy to another.

Hope this helps.

Answer:

Mach 1.4

Explanation:

V = 331.5 + 0.6*0 = 331.5 m/s

464.1/331.5 = Mach 1.4

The radius of each jawbreaker is approximately 0.68 cm.

where

r = radius

Therefore,

23 g  = 32.3 cm³

0.94 g  = ?

cross multiply

volume of a single jawbreaker = 32.3 × 0.94 / 23 = 30.362 / 23 = 1.32 cm³

Therefore,

volume of each jawbreaker = 4 /3 πr³

1.32 = 4 / 3 × 3.14 × r³

r³ = 1.32 /4.18666666667

r³ = 0.31533683707

r = ∛0.31533683707

r = 0.680651651 = 0.68

Therefore, the radius of each jawbreaker is approximately 0.68 cm.

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Answer:

5 m/s2

Explanation:

Using the equation velocity = initial velocity + (acceleration x time)

30 m/s = 0 + acceleration x 6 s

30 m/s = 6 s x acceleration

30 m/s / 6s = acceleration

acceleration = 5 m/s2

Answer: The resultant displacement vector is 5.6km

The resultant displacement vector of the hiker is equal to 5.6 km.

The distance can be described as the total length traveled by an object and is a scalar quantity with only magnitude. The distance should be always positive.

The displacement of an object can be described as the shortest length between two points. The displacement can be considered as a vector quantity with direction & magnitude. The displacement can be +ve, -ve, or zero and can be changed with time.

Given, a hiker moves 5.0 km along AB in the North and then 2.5 km west along BC.

The length (AC) is the resultant displacement that can be calculated by using Pythagoras' theorem:

AC² = AB² + BC²

AC² = (5.0)² + (2.5)²

AC² = 25 + 6.25

AC = 5.59 km ≈ 5.6 km

Therefore, the displacement of the hiker is 5.6 Km.

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It prove that liquid pressure increases with depth

Time:-

[tex]\\ \rm\hookrightarrow \dfrac{2.998\times 10^9}{96}[/tex]

[tex]\\ \rm\hookrightarrow 0.0312\times 10^9[/tex]

[tex]\\ \rm\hookrightarrow 3.12 \times 10^7hrs[/tex]

The person would have died before reaching Uranus .

Based on the data provided;

The formula for calculating density is given as:

From the formula above;

mass = density × volume

also, volume = area × height

Therefore,

mass = density × area × height

Calculating for the height of the liquid:

Height, L = 90.8 / (0.86 × 6.08)

L = 17.2 cm

The pressure due to a liquid is calculated using the formula below:

where;

h is height = 17.2 cm = 0.172 m

P is density = 0.86 g/cm^3 = 860 kg/m^3

g is acceleration due to gravity = 9.8 m/s^2

Pressure = 860 kg/m^3 × 0.172 m × 9.8 m/s^2

Pressure = 1449.616 N/m

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Answer:

1014 V/m

Explanation:

C = 0.000031 F. Q = 0.000022 C, d = 0.7 mm,

V = Q/C = 0.000022/0.000031 = 0.7097 V

E = V/d = 0.7097/0.0007 = 1014 V/m

Answer:

looking at aircraft of a similar size and performance, the propeller diameter is generally in the region of 1.4 – 1.8 m (4.6 ft to 6.0 ft).

Explanation:

Answer: 4500 m

Explanation:

[tex]15 min. * \frac{240 m}{min.} = 3600 m[/tex]

[tex]10 min. * \frac{90m }{min.} = 900 m[/tex]

[tex]3600m +900m = 4500m[/tex]

The weight of the ant is the force that acts on the anthill in the downward direction and at angle of 30° rom the vertical.

Given the following data:

In Science, a free-body diagram can be defined as a graphical illustration which is typically used to visualize moments, tension, and applied forces that are acting on an isolated or rigid body (object) while using arrows pointing in the direction of these forces.

In this scenario, the weight of the ant is the force that acts on the anthill in the downward direction and at angle of 30° rom the vertical.

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Answer:

B, longitudinal moves up and down, seismic also,l

Answer:

A. 278K

Explanation:

I look it up it and I used a conversion chart