A Tennis ball falls from a height 40m above the ground the ball rebounds
with 0.5 of the velocity with which it strikes the ground. If the ball rebound
with 1/2 of the velocity with which the balls strike the ground any time the
ball striked the ground. Calculate
[i] the position of the ball after 5s from the ground
[iiafter how many bounds will the ball remain on the ground
(iii) what is the time interval between the third and fourth bounds
(iii) predicts the velocity of the ball after 6s​

Because the horizontal fraction of ground-generated pressure (F_ground) corresponds to F_wall, it is reasonable to assume that the duration of ground influence on the ladder is roughly 481.55 N in magnitude.

The ladder's grounding point on the wall is 3.0 m away with the application of the Pythagorean theorem. By analyzing the torque at the ladder's foundation and surveying its diversified forces, we can derive estimates:

• The person's strength (F_person), determined by 45.0 kg * 9.81 m/s^2 calculations, is approximately 441.45 N when applied to a length of 3.75 m.

• The ladder's mass-based force (F_ladder), calculated as 12.0 kg * 9.81 m/s^2, is about 117.72 N exerted upon a distance of 2.5 m.

• Atop the ladder falls the wall's upward-directed push action- referred to as F_wall- which operates at an elevation of 4.0m from the earth's plane.

To ensure compliance:  Equilibrium occurs if the equation (3.75 m * 441.45 N) + (2.5 m * 117.72 N) - (4.0 m * F_wall) equals zero.

Thus, F_wall ≈ 481.55 N  after resolving the problem mathematically.

Additionally, because the horizontal fraction of ground-generated pressure (F_ground) corresponds to F_wall, it is reasonable to assume that the duration of ground influence on the ladder is roughly 481.55 N in magnitude.

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Answer:

0.1Ns

Explanation:

Impulse is the product of Force and time

Impulse = Force * Time

Given

Force = 10N

Time = 0.01s

Substitute into the formula

Impulse = 10 * 0.01

Impulse = 10 * 1/100

Impulse = 10/100

Impulse = 0.1Ns

hence the impulse of the hammer is 0.1Ns

The heating time constant is 13 seconds and the steady state temperature is 38°C.

To find the heating time constant and steady state temperature, use the formula:

ΔT = P × R × (1 - e^(-t/τ))

where ΔT = temperature rise, P = power, R = thermal resistance, t = time, τ = heating time constant, and e = natural logarithmic constant.

Let's use the given information to solve for τ:

ΔT1 = 25°C (for the first 25 minutes)

ΔT2 = 40°C (for the second 25 minutes)

t = 25 + 25 = 50 minutes

The temperature rise over the entire 50 minutes is:

ΔT = ΔT1 + ΔT2 = 25°C + 40°C = 65°C

The average power can be calculated as:

P = ΔT / (t × R)

Assume that the power output is the rated power of the motor. Let's assume that the rated power is 100 W.

Then, solve for R:

R = ΔT / (t × P) = 65°C / (50 min × 100 W) = 0.13 °C/W

Now, solve for the heating time constant:

τ = R × C

where C = thermal capacitance. Value of C is unknown, but make an assumption that the thermal time constant is on the order of minutes to hours. Let's assume that C = 100 J/°C.

Then, τ = 0.13 °C/W × 100 J/°C = 13 seconds

Finally, solve for the steady state temperature:

ΔT = P × R

T_ss = T_amb + ΔT = 25°C + 100 W × 0.13°C/W = 38°C

Therefore, the heating time constant is 13 seconds and the steady state temperature is 38°C.

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Answer:

If we are upset, often our mind cannot think straight. we need to take deep breaths, and focus on reality. When we are upset we do things out of anger.

Explanation:

Hope this helps!

Answer:

2.22m/s to the left

Explanation:

Given parameters:

Initial position = +125m

Final position  = -75m

Motion time  = 90s

Unknown:

Velocity of the steel ball  = ?

Solution:

The velocity of the steel ball is given as the displacement divided by the time;

   Velocity  = \(\frac{displacement}{time}\)

The net displacement of the ball  = 125- (-75) = 200m to the left

Input the parameters and solve for the velocity;

     Velocity  = \(\frac{200}{90}\)   = 2.22m/s to the left

Answer:

Circulatory System

Explanation:

The respiratory system works with the circulatory system to provide tis oxygen and to remove the waste products of metabolism. It also helps to regulate PH of the blood. Respiration is the sequence of events that result in the exchange of oxygen and carbon dioxide between the atmosphere and the body cells.

Answer: It’s fastest in gases. Letter C !

Explanation:

Answer:

its c

Explanation:

Hi there! :)

Reference the diagram below for clarification.

1.

We must begin by knowing the following rules for resistors in series and parallel.

In series:
\(R_T = R_1 + R_2 + ... + R_n\)

In parallel:
\(\frac{1}{R_T} = \frac{1}{R_1} + \frac{1}{R_2} + ... + \frac{1}{R_n}\)

We can begin solving for the equivalent resistance of the two resistors in parallel using the parallel rules.

\(\frac{1}{R_{T, parallel}} = \frac{1}{10} + \frac{1}{10}\\\\\frac{1}{R_{T, parallel}} = \frac{2}{10} = \frac{1}{5}\\\\R_{T, parallel} = 5\Omega\)

Now that we have reduced the parallel resistors to a 'single' resistor, we can add their equivalent resistance with the other resistor in parallel (15 Ohm) using series rules:
\(R_T = 15 + 5\\\\\boxed{R_T = 20 \Omega}\)

2.

We can use Ohm's law to solve for the current in the circuit.

\(i = \frac{V}{R_T}\\\\i = \frac{120}{20} = \boxed{6 A}\)

3.

For resistors in series, both resistors receive the SAME current.

Therefore, the 15Ω resistor receives 6A, and the parallel COMBO (not each individual resistor, but the 5Ω equivalent when combined) receives 6A.

In this instance, since both of the resistors in parallel are equal, the current is SPLIT EQUALLY between the two. (Current in parallel ADDS UP). Therefore, an even split between 2 resistors of 6 A is 3A for each 10Ω resistor.

4.

Since the 15.0 Ω resistor receives 6A, we can use Ohm's Law to solve for voltage.

\(V = iR\\\\V = (6)(15) = \boxed{90 V}\)

Speed of the drop will be 15.4919m/s

Given :- g =10m/s²

u=0

s=12

v²-u²=2as is the formula to be used.

v²=u²+2as

v²=2 x 10 x 12

=240

v=√240 m/s

=15.4919m/s

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Answer:

-12.1

Explanation:

i’m almost sure this is it, i’m checking my old answers

if not let me know and i’ll give you some more answers

The potential energy of the roller coaster is 176,400 J (joules).

The potential energy of an object is given by the formula PE = mgh, where PE is the potential energy, m is the mass of the object, g is the acceleration due to gravity, and h is the height or vertical position of the object.

In this case, the roller coaster is at a peak of 20m and has a mass of 900kg. The acceleration due to gravity, g, is approximately 9.8 \(m/s^2\).

Using the formula, we can calculate the potential energy:

PE = mgh

= (900 kg)(9.8 \(m/s^2\))(20 m)

= 176,400 J

Therefore, the potential energy of the roller coaster is 176,400 J (joules).

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The two strings are taut. When the system is released from rest, it accelerates at 2 m/s2 then, Mass of A = 8m/5 kg.

Let the mass of the body A be ‘m’.

The two strings are taut so they exert a tension ‘T’ on body A.

Let ‘a’ be the acceleration produced in the system.

The free body diagram of body A is given below: mA + 2T = mA + ma = mA + m(2)mA + 10T = mA + ma = mA + m(2)

As the two strings are taut, we can say that tension in both strings is equal.

Therefore 2T = 10T or T = 5T As the body A is resting on a smooth horizontal table, there is no friction force acting on the body A.

The net force acting on body A is the force due to tension in the strings. ma = 2T – mg …(1)

As per the given problem, the system is released from rest.

Hence the initial velocity is zero.

Also, we are given that the system accelerates at 2 m/s2.

Therefore a = 2 m/s2 …(2)

From the equations (1) and (2), we get, m(2) = 2T – mg …(3)⇒ m(2) = 2×5m – mg⇒ 2m = 10m – g⇒ g = 8m/5

Thus, the mass of A is 8m/5 kg.

Answer: Mass of A = 8m/5 kg.

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Explanation:

A concave lens is also known as a diverging lens because it is shaped round inwards at the centre and bulges outwards through the edges, making the light diverge. They are used to treat myopia as they make faraway objects look smaller than they are.

D) None of the options above is the proper response. Option (D)

describes the movement of a wire perpendicular to a magnetic field with no induced voltage.

If the wire has insulation surrounding it, then there will also be some induced voltage present in the wire.

It will also have some induced voltage if it is moving very quickly or vibrating back and forth.

The wire induced voltage will also be low if the wire is moving slowly.

It also induces voltage if it is composed of copper.

There is just one situation where the wire is stationary and does not produce induced voltage.

hence the appropriate choice is Alternative (d) None of the above

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Explanation:

The tangential speed of Andrea is given by :

\(v=r\omega\)

Where

r is radius of the circular path

ω is angular speed

The merry-go-round is rotating at a constant angular speed. Let the new distance from the center of the circular platform is r'

r' = 2r

New angular speed,

\(v'=r'\omega'\\\\v'=(2r)\omega\\\\v'=2r\omega\\\\v'=2v\)

New angular speed is twice that of the Chuck's speed.

The ranking is based on the tilt of the Earth's axis and its orbit around the Sun. The figure at 40°N in June receives the most daylight because it is located at a high latitude during the summer solstice in the Northern Hemisphere. The Earth's axis tilts towards the Sun, resulting in longer days and shorter nights. The figure at 40°S in December receives a moderate amount of daylight as it is located at a lower latitude during the summer solstice in the Southern Hemisphere.

The figure at 40°N in December experiences less daylight because it is located at a high latitude during the winter solstice in the Northern Hemisphere, with shorter days and longer nights. Lastly, the figure at 40°S in June receives the least amount of daylight as it is located at a lower latitude during the winter solstice in the Southern Hemisphere, where the days are shortest and the nights are longest. Based on the information given, the ranking of figures based on the amount of daylight they experience in a 24-hour period, from most to least.

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The general strengths of epidemiology for providing an answer to Mary Beth’s question.

The general  weaknesses of epidemiology for providing an answer to Mary Beth’s question:

The Specific strengths of a study:

The specific weaknesses of a study are :

Epidemiology is described as  the study and analysis of the distribution, patterns and determinants of health and disease conditions in a defined population.

The main objective of epidemiology has been said is to find  out what causes different health outcomes in different groups of people.

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Answer:Probably because we've been so dependent on them,and we took to long to find new reusable resources.

Explanation:

The speed of car A after the collision is 0.52 m/s.

In everyday use and kinematics, the speed of object is the amount of change in position over time, or the amount of change in position per unit time. So it's a scalar quantity.

For a bumper car A

Mass (m₁) = 296 kg

Velocity (V₁) = 3.74 m/s,

For a bumper car B

Mass (m₂) = 222 kg

Velocity (V₂) = 1.85 m/s,

To calculate velocity of car A after the collision mathematically:

Vₙ =(m₁-m₂/m₁+m₂)V₁

Vₙ = Final velocity of car A

Vₙ = (296 - 222/296 + 222) × 3.74

Vₙ = 0.52 m/s

Hence, the velocity of car A after the collision

Vₙ = 0.52 m/s

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Answer:

Force

Explanation:

Answer:

those are all correct. The arrows are matched correctly

Answer:

a feat

Explanation:

cause the mf already 7ft on the dot there is no such thing as 6 ft 12

Answer:

You would weigh the same.

Explanation:

At the moment, since Earth is not a perfect sphere, the Earth "bulges out" at the equator, so you're further from the centre of the Earth. Since gravity acts through a body's center of mass, the further you are from the centre the weaker the gravitational acceleration you will feel, because gravity weakens over distance.

So, you're actually lighter at the equator than you'd be at the poles.

However, if the Earth was a perfect sphere, this "bulge" at the equator would not happen, and so you would weigh the same at the poles and at the equator.

Hope this makes sense.

Answer:

1➡️ this is the method of decomposition

2➡️ H2 and O2

3➡️ b

sorry if I am wrong

Answer:

Her computer is producing thermal energy, not heat.

Explanation:

Answer:

Her computer is producing thermal energy,not heat

Explanation:

Answer:

15.4

Explanation:

Answer:

yes, we can tell if there will be rain by the swelling in rain clouds, we can also see if a tornado is forming based on the look of the wall cloud. we can use satellites to predict the amount of precipitation or wind.

Explanation:

thank you for ur generosity

Answer:

μ = 0.41

Explanation:

\(\frac{1}{2} kx^2 = \mu mgd\)

\(\mu = (\frac{1}{2} kx^2)/mgd\)

\(\mu = (\frac{1}{2} (100)(0.2)^2)/(0.5)(9.81)(1)\)

\(\mu = 0.41\)

The coefficient of kinetic friction between the block and the tabletop is 0.41.

The given parameters;

The coefficient of kinetic friction between the block and the tabletop by applying the principle of conservation of energy as shown below.

Fd = Uₓ

μmgd = ¹/₂kx²

where;

The coefficient of kinetic friction between the block and the tabletop;

\(\mu_k = \frac{kx^2}{mgd} \\\\\mu_k = \frac{100\times 0.2^2}{2\times 0.5\times9.8 \times 1 } \\\\\mu_k = 0.41\)

Thus, the coefficient of kinetic friction between the block and the tabletop is 0.41.

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