A 70 kg Throckmorton was riding his skateboard when a small, but juicy 0.001 kg beetle hits the front of his helmet, splattering, obstructing his view. Who experienced the greatest change in momentum?

The mechanical energy of the swing is the sum of the potential energy and the kinetic energy which is equal to 225 Joules.

Mechanical energy is the energy which is present either in an object which is in motion or the energy which is stored in objects by their position. Mechanical energy is the main driver of renewable energy. Many different forms of renewable energy rely directly on the mechanical energy to adequately produce enough amount of power or convert energy.

The mechanical energy of the object is the sum total of individual energies which are present in the object. The mechanical energy of an object can be represented as:

M.E. = P.E. + K.E.

M.E. = Mechanical energy,

P.E. = Potential energy,

K.E. = Kinetic energy

Therefore, the mechanical energy of the swing will be:

M.E. = 150J + 75J

M.E. = 225 Joules

Therefore, the mechanical energy of the swing is equal to 225 Joules.

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Answer:

4417

i think because

mv^2/r is centripetal force

The apparent weight is given by the sum of the actual weight, and the force due to acceleration

Just before she leaves the trampoline > When she is instantaneously at rest > When she is at the top of her flight

The reasons the above order is correct are given as follows:

Acceleration, a = 0

Apparent weight,  \(W_a\) = m × (g + 0) = m·g = W

\(W_a\) =  W

Just before, the trampolinist leaves the trampoline, with an upward acceleration, a, the net acceleration is (g + a), and the apparent weight,  \(W_a\), is therefore;

Apparent weight is, \(W_a\) = m × (g + a)

When she is at the top of her flight, we have that apparent weight of the which is the force felt supporting her motion, is zero (0) (no force is moving her upwards and instantaneously, she is weightless (able to remain at a point in the air).

Therefore, at the top of her flight, \(W_a\) = 0

Which gives in order from largest to smallest;

Just before she leaves the trampoline > When she is instantaneously at rest > When she is at the top of her flight

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Answer:

1) rate of motion

Explanation:

Speed is the rate of motion. Whereas velocity is the rate and direction of motion.

Answer:

rate of motion is the correct answer because the rate is the speed in wich you are moving

The farmer uses this technique to protect the produce from freezing because as the water in the tubs begins to freeze, it releases heat. This heat can help to keep the surrounding air in the shed above freezing, protecting the produce from freezing as well. Additionally, as the water in the tubs freezes, it releases latent heat of fusion, which is the energy required to change a substance from a solid to a liquid. This energy is also released in the form of heat, further helping to keep the produce from freezing.

When a person increases their activity level to gain muscle mass, their nutritional needs change.

The key changes include increasing protein intake to support muscle growth and repair, consuming a slight caloric surplus to provide energy for muscle development, ensuring sufficient carbohydrate intake for fuel, including healthy fats for overall health, staying hydrated, and considering essential micronutrients.

Individual variations exist, so seeking personalized guidance from a professional is recommended.

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The net force on particle q₂, located between particles q₁ and q₃, is approximately 189000 N. The force exerted by particle q₁ on q₂ is positive and equals 252000 N, while the force exerted by particle q₃ on q₂ is negative and equals -63000 N.

To find the net force on particle q₂, we need to calculate the individual forces exerted on q₂ by particles q₁ and q₃ and then determine their sum.

The force between two charged particles can be calculated using Coulomb's law:

F = k * |q₁ * q₂| / r²

Where F is the force between the particles, k is the electrostatic constant (k ≈ 9.0 x \(10^9\) Nm²/C²), q₁ and q₂ are the charges of the particles, and r is the distance between them.

First, let's calculate the force exerted on q₂ by q₁:

F₁₂ = k * |q₁ * q₂| / r₁₂²

F₁₂ = (9.0 x \(10^9\) Nm²/C²) * |(8.0 μC) * (3.5 μC)| / (0.10 m)²

F₁₂ ≈ 252000 N

The force is positive because q₁ and q₂ have opposite charges.

Next, let's calculate the force exerted on q₂ by q₃:

F₂₃ = k * |q₂ * q₃| / r₂₃²

F₂₃ = (9.0 x \(10^9\)Nm²/C²) * |(3.5 μC) * (-2.5 μC)| / (0.15 m)²

F₂₃ ≈ -63000 N

The force is negative because q₂ and q₃ have the same charge.

Finally, we can find the net force on q₂ by summing the individual forces:

Net force = F₁₂ + F₂₃

Net force = 252000 N + (-63000 N)

Net force ≈ 189000 N

The net force on particle q₂ is approximately 189000 N.

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What is this?

Explanation:

Grouping data refers to the process of categorizing or organizing data based on specific criteria or attributes.

It involves grouping similar data points together to gain a better understanding of patterns, relationships, and trends within the dataset. By grouping data, you can simplify complex information and derive meaningful insights from large amounts of data. The purpose of grouping data is to create subsets or clusters that share common characteristics.

This enables easier analysis, summarization, and comparison of data within each group. Grouping can be performed on various types of data, such as numerical, categorical, or time-based data. Grouping data allows for the exploration of data at different levels of granularity.

For example, you can group sales data by region to analyze regional performance, or group customer data by demographics to identify specific customer segments. This process helps in identifying outliers, detecting patterns, and making data-driven decisions.

Common techniques for grouping data include using functions like GROUP BY in SQL or utilizing data visualization tools to create charts or graphs that illustrate the grouped data. Grouping can be applied in various fields, such as marketing, finance, healthcare, and research, to uncover insights and support decision-making processes.

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The acceleration of the object in the inclined plane is g sinθ.

The velocity of the object on the inclined plane is √(2gL sinθ).

Given that the inclined surface is a frictionless surface. So, the force of friction is zero. Hence the components of the weight of the object provides the necessary forces to slide the object over the inclined plane.

a) Newton's second law is applied to masses on inclination.

Acceleration due to multiplied by the sine of the angle of inclination provides the acceleration for a frictionless slope of angle in degrees.

The acceleration of the object in the inclined plane is,

a = g sinθ

b) Applying the third equation of motion,

v²- u² = 2as

v² = 2as

v² = 2 x g sinθ x L

Therefore, the velocity of the object on the inclined plane is given by,

v = √(2gL sinθ)

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Answer:

VB

Explanation:

Answer:

m₁ = 70 lb

Explanation:

Here we will use the law of conservation of momentum:

m₁u₁ + m₂u₂ + m₃u₃ = m₁v₁ + m₂v₂ + m₃v₃

where,

m₁ = mass of first suitcase = ?

m₂ = mass of second suitcase = 30 lb

m₃ = mass of baggage carrier = 50 lb

u₁ = initial speed of first suitcase = 7.2 ft/s

u₂ = initial speed of second suitcase = 7.2 ft/s

u₃ = initial speed of baggage carrier = 0 ft/s

v₁ = Final speed of first suitcase = 4.8 ft/s

v₂ = Final speed of second suitcase = 4.8 ft/s

v₃ = Final speed of baggage carrier = 4.8 ft/s

because after collision all three will have same speed

Therefore,

(m₁)(7.2 ft/s) + (30 lb)(7.2 ft/s) + (50 lb)(0 ft/s) = (m₁)(4.8 ft/s) + (30 lb)(4.8 ft/s) + (50 lb)(4.8 ft/s)

(m₁)(7.2 ft/s) + (216 lb ft/s) + (0 lb ft/s) = (m₁)(4.8 ft/s) + (144 lb ft/s) + (240 lb ft/s)

(m₁)(7.2 ft/s) - (m₁)(4.8 ft/s) = 168 lb ft/s

m₁ = (168 lb ft/s)/(2.4 ft/s)

m₁ = 70 lb

Answer:

A

Explanation:

Momentum change is basically impulse

Object possessing more velocity after bouncing OR the object which bounces more have more impulse

Answer:

sorry but I don't know what exactly I'm supposed to calculate.you never actually stated it

Answer:

Explanation:

A) The output force required to lift a 15 kg object would be equal to the weight of the object, which is given by:

Output force = Weight of object = m * g

where m is the mass of the object and g is the acceleration due to gravity. Assuming that g is equal to 9.81 m/s^2, we have:

Output force = 15 kg * 9.81 m/s^2 = 147.15 N

Therefore, the output force required to lift a 15 kg object would be 147.15 N.

B) In this case, the input force is the force that you are pushing down with the lever, which is given as 20 N.

C) The mechanical advantage of the ramp is given by the ratio of the output force to the input force. In this case, the output force is the weight of the object (40 N) and the input force is the force that you are pushing with (10 N). Therefore, the mechanical advantage of the ramp would be:

Mechanical advantage = Output force / Input force = 40 N / 10 N = 4

So, the ramp multiplies your force by a factor of 4.

Note that in all of these calculations, we have assumed that the system is ideal and that there are no losses due to friction or other factors. In practice, these losses will reduce the mechanical advantage of the system and make it more difficult to lift or move objects.

Answer:

v= ir

Here, I = 0.26

R = 852

So,

v = 0.26 x 852

= 221.52 V

If R = 85.2 and I = 0.26,

V= ir

v = 0.26 x 85.2

v = 22.152.

Hope it helps.

Initial speed of ball will be 2.7m/s.

When a body is rotating about an axis, then it has kinetic energy.

And this energy is called rotational kinetic energy.

It is given as -  R.K.E. = 1/2 Iω²

And if a ball is rolling without slipping.

Then the moment of inertia of the solid ball is written as -

I = 25MR²

Vi = Rω

Here it is given in the problem that-

height(h) = 0.53m

Now by the conservation of energy we can write the equation as -

1/2MVi² + 1/2Iω² = Mgh

so that -

(1/2)MVi² + (1/2)×(2/5MR²) ×(Vi/R)² = Mgh(1/2)Vi² + (1/5)Vi²

= gh(7/10)Vi² = 9.8 × 0.53

Vi = 2.7 m/s

So that the initial velocity of ball came out to be 2.7m/s after applying all concepts or rotational motion.

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The mass of the planet is  5.98 × 10^24 kg.

To calculate the mass of the planet, we can use Kepler's Third Law of Planetary Motion. This law states that the square of the period of revolution of a planet around the sun is directly proportional to the cube of the semi-major axis of its orbit.

First, we need to convert the period of the satellite's orbit to seconds. We know that there are 60 minutes in an hour, so the period can be expressed as (6 × 60 + 12) minutes, which equals 372 minutes. Multiplying this by 60 seconds, we get a period of 22,320 seconds.

Next, we need to find the semi-major axis of the orbit. In a circular orbit, the semi-major axis is equal to the radius of the orbit. Therefore, the semi-major axis is 8.8 × 10^6 m.

Now, we can apply Kepler's Third Law to calculate the mass of the planet. The formula is T^2 = (4π^2/GM) × a^3, where T is the period of revolution, G is the gravitational constant, M is the mass of the planet, and a is the semi-major axis of the orbit.

Rearranging the formula, we can solve for the mass of the planet:
M = (4π^2/G) × a^3 / T^2

Plugging in the values, we get:
M = (4 × π^2 / 6.67430 × 10^-11) × (8.8 × 10^6)^3 / (22,320)^2

Evaluating this expression, we find that the mass of the planet is approximately 5.98 × 10^24 kg.

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Answer:

B. 2 hours

Explanation:

45 miles an hour times 2 is 90 miles in 2 hours

Answer:

B. 2 Hours

Explanation:

If your going at a constant speed of 45 miles per hour then, it will take two hours because 45x2 is 90. and if you divided 90 and 45, you will get 2.

The acceleration of the cart is 7.75 m/s².

The acceleration of the cart is determined by applying Newton's second law of motion.

Newton's second law of motion states that the force applied to an object is directly proportional to the product of mass and acceleration of the object.

Mathematically, it is given as;

F (net) = ma

where;

F (net) = F ( applied ) -  F ( friction )

F (net)  = 2000 N - 450 N

F (net)  = 1550 N

The acceleration of the cart is calculated as follows;

F (net) = ma

a = F(net) / m

a = ( 1550 N ) / ( 200 kg )

a = 7.75 m/s²

Thus, the acceleration of the cart depends on the applied force, force of friction and the mass of the cart on which the force is applied.

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Answer:

See down

Explanation:

Airborne Testing
In order to rate the airborne sound insulation of a party element, speakers are used to generate white noise, usually at levels of around 100 decibels, in the source room. Then, using a moving microphone technique, the average sound pressure level is measured the other side of the element in question.

The correct answer is Self-critical.

Why is self-improvement?

Self-critical:

Self-critical causes them to always strive for self-improvement and never to see accomplishing a goal as good enough.

The characteristic of a turbulent person causes them to always strive for self-improvement and to never see accomplishing a goal as good enough is Self-critical.

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The best predictor of the radioactive nature of an isotope is the neutron-to-proton ratio. The correct option is second.

The proton is a subatomic particle lies inside the nucleus of an atom of element. The number of proton gives an idea of the atomic number of the element.

Isotopes are the elements having the same number of protons but they don't have the same number of neutrons.

The best predictor of the radioactive nature of an isotope is the neutron-to-proton ratio.

Thus, the correct option is second.

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Answer:

100 A.

Explanation:

From the question given above, the following data were obtained:

Electrochemical equivalent (Z) = 0.0012 g/C

Mass (M) = 36 g

Time (t) = 5 mins

Current (I) =?

Next, we shall determine the charge. This can be obtained as follow:

Electrochemical equivalence (Z) = 0.0012 g/C

Mass (M) = 36 g

Charge (Q) =.?

M = ZQ

36 = 0.0012 × Q

Divide both side by 0.0012

Q = 36 / 0.0012

Q = 30000 C

Next, we shall convert 5 mins to s. This can be obtained as follow:

1 min = 60 s

Therefore,

5 mins = 5 × 60

5 mins = 300 s

Finally, we shall determine the current. This can be obtained as shown below:

Charge (Q) = 30000 C

Time (t) = 300 s

Current (I) =?

Q = It

30000 = I × 300

Divide both side by 300

I = 30000 / 300

I = 100 A

Therefore, the current is 100 A.

Answer:Doctor has prescribed a lens having power +1.5D. What would be the focal length of the lens? What is the type of lens and what must be the defeat of vision?

Explanation: A student uses spectacles of power + 1.5D. What is the type of defect in his eyes? Calculate the focal length of the lens used? Ans: ​

Answer:

2 m = E / c^2      where m is mass of electron

E = h v     where v is the frequency ( nu) of the incident photon

E = h c / y      where y is the incident wavelength (lambda)

2 m = h / (c y)

y = h / (2 m c)      wavelength required

y = 6.62 * 10E-34 / (2 * 9.1 * 10E-31 * 3 * 10E8)  m

y = 3.31 / 27.3 E-11 m

y = 1.21 E -12 m   = .0121 Angstrom units

A Stone Is Dropped Into a Deep Water Well. The Sound of The Stone Hitting The Water Is Heard After 3.4 Seconds. then The Depth of The Water Well is 56.6 m.

In terms of physics, sound is a vibration that travels through a transmission medium like a gas, liquid, or solid as an acoustic wave. Sound is the receipt of these waves and the brain's perception of them in terms of human physiology and psychology. Only acoustic waves with frequencies between about 20 Hz and 20 kHz, or the audio frequency range, may cause a human to have an auditory sensation. These correspond to sound waves in air with an atmospheric pressure of 17 metres (56 ft) to 1.7 centimetres (0.67 in) in wavelength. Ultrasounds are sound waves with a frequency higher than 20 kHz that are inaudible to humans. Infrasound refers to sound frequencies below 20 Hz. Animals of different species have different hearing ranges. Acceleration of the stone is 9.8 m/s²

according to kinematics,

s = ut + 1/2 at²

s =  1/2 ×9.8×3.4²

s = 56.6 m

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Answer:

t = 1.52 s

Explanation:

The speed of sound is constant and depends only on the properties of the medium in which the sound propagates, many of these properties change with temperature, in the case of propagation in air, the speed of sound

          v =\(331 \ \sqrt{1+ \frac{T}{273} }\)

where the temperature is in degrees centigrade

         v = 331 \(\sqrt{1+ \frac{6}{273} }\) = 331    1.0109

         v = 334.6 m / s

let's use the uniform motion relationships

         v = x / t

          t = v / x

let's calculate

          t = 334.6 / 220.0

          t = 1.52 s