If you lift a one liter water bottle over your head by one half meter, determine:
a) The amount of force you a =
Newtons or 2.2 lbs

Answer:

920000

Explanation:

Each kg contains 1,000 grams

The moment of inertia (I) will changes and net torque (Tnet) will also change, while the angular acceleration (a) remains constant.

The formula for net torque acting on an object is given as;

T(net) = Ia

where;

The  moment of inertia of an object is given as;

I ∝ MR²

where;

So mass, M changes, the moment of inertia (I) changes and net torque will also change, while the angular acceleration remains constant.

Learn more about moment of inertia here: https://brainly.com/question/3406242

#SPJ1

The electron configuration of an element with atomic number 15 is 3s² 3p⁵.

The electron configuration of an element with atomic number 15 (which corresponds to the element phosphorus) can be determined by following the Aufbau principle and the Pauli exclusion principle. The Aufbau principle states that electrons occupy the lowest energy levels available, while the Pauli exclusion principle states that each orbital can hold at most two electrons with opposite spins.

Starting with the first energy level, we fill in the electrons for each subsequent energy level until we reach the 15 electrons of phosphorus: 1s² 2s² 2p⁶ 3s² 3p⁵

To know more about electron configuration visit:-

brainly.com/question/30784604

#SPJ1

Answer:

The energy goes from the ground state to the excited states above it.

Answer:

The location of the survey is biased.

Explanation:

If someone left a movie theater, it is most likely because he likes watching movies there. A better place to interview would be on the streets, as it’s less biased there

Answer:

It will be D/ The location of the survey introduced bias!

Explanation:

(D) virtual and larger than the object.

Concave mirror is spherical mirror which has its reflecting surface bulging inwards

. The focal length of a mirror is the distance between the pole of the mirror and a point where all the reflected rays merge,The focal point and the centre of curvature of the concave mirror lie in front of the mirror

so,if an object is located between the focal point and a concave mirror we can use the ray diagram to check this,

.

, the image produced will be virtual , and longer than the object

so, the answer is

(D) virtual and larger than the object.

I hope this helps you

Answer:

x-Speed/velocity

y-time.

Explanation:

because Speed is a rate of change of distance while time how long it takes a a car to move to a specific point

The well that will have most of the water will be well A.

The underground water supply is defined as a type of water that exists underground in saturated zones beneath the land surface.

From the two wells represented in the diagrams above, Well A has water supply from underground which is lacking in well B.

Therefore, well A will have most of the water more than B.

Learn more about water cycle here:

https://brainly.com/question/25796102

#SPJ1

Answer:

The direction of magnetic field is along + Z axis.

Explanation:

The direction of motion of electron is along y axis.

The magnetic  force is along - X axis.

The force on the charged particle moving in the magnetic field is

\(\overrightarrow{F} = q (\overrightarrow{v}\times \overrightarrow{B})\\\\- F \widehat{i} = - q (v \widehat{j}\times \overrightarrow{B})\\\)

So, the direction of the magnetic field is along + Z axis.

The equation that relates the forces acting on person to the acceleration of the person in elevator is as : N - mg = ma

An influence that causes the motion of object with mass to change it's velocity is called force.

The equation that relates forces acting on the person to acceleration of the person in elevator is: N - mg = ma

N is normal force exerted on the person by the elevator floor, m is mass of the person, g is acceleration due to gravity, and a is acceleration of the elevator.

This equation is derived from Newton's second law of motion, which states that net force acting on object is equal to its mass times its acceleration. In this case, net force acting on the person is the difference between normal force N and force of gravity mg, which is equal to ma, the product of person's mass and acceleration of the elevator.

To know more about force, refer

https://brainly.com/question/12785175

#SPJ4

Answer:

The deceleration is  \(a = - 76.27 m/s^2\)

Explanation:

From the question we are told that

   The height above  firefighter safety net is \(H = 14 \ m\)

   The length by which the net is stretched is \(s = 1.8 \ m\)

From the law of energy conservation

    \(KE_T + PE_T = KE_B + PE_B\)

 Where \(KE_T\) is the kinetic energy of the person before jumping which equal to zero(because to kinetic energy at maximum height )

   and  \(PE_T\) is the potential energy of the before jumping  which is mathematically represented at

          \(PE_T = mg H\)

and  \(KE_B\) is the kinetic energy of the person just before landing on the safety net  which is mathematically represented at

        \(KE_B = \frac{1}{2} m v^2\)

and  \(PE_B\) is the potential energy of the person as he lands on the safety net which has a value of zero (because it is converted to kinetic energy )

   So the above equation becomes

          \(mgH = \frac{1}{2} m v^2\)

=>           \(v = \sqrt{2 gH }\)

    substituting values

                \(v = 16.57 m/s\)

Applying the equation o motion

             \(v_f = v + 2 a s\)

Now the final velocity is zero because the person comes to rest

      So

         \(0 = 16.57 + 2 * a * 1.8\)

            \(a = - \frac{16.57^2 }{2 * 1.8}\)

            \(a = - 76.27 m/s^2\)

Answer:

Explanation:

The Law of Energy Conservation states that K1 + U1 = K2 + U2

m= 72.0 kg

h= 3.90 m

a)

K1 + U1 = K2 + U2

0 + mgh = 1/2mvf^2 + 0

mass cancels out so gh=1/2vf^2

(9.8 m/s^2)(3.9 m)=(.5)(vf^2)

vf= 8.74 m/s

b)

1/2mv^2 + mgh = 1/2mv^2 + 0

mass cancels again

(.5)(2.9^2 m/s) + (9.8 m/s^2)(3.9 m) = (.5)(vf^2)

vf= 9.21 m/s

c)

This would be the same as the past problem as the velocity gets squared so direction along the axis doesn't matter. Thus, vf= 9.21 m/s

Answer:

c

Explanation:

It's c the last one u see

Answer: 30 cm.

The situation described is that of two sources of sound waves that are separated by some distance. The two waves interfere with each other constructively at some points and destructively at others. When they interfere constructively, the amplitude (and intensity) of the sound wave is greater than when they interfere destructively.

When the speakers are 40 cm apart, the waves that they produce are in phase at some points on the axis, leading to constructive interference and a maximum in the intensity of the sound. As the distance between the speakers is increased beyond 40 cm, the points of constructive interference move farther apart, and the intensity of the sound decreases. When the speakers are 50 cm apart, the waves that they produce are exactly out of phase at some points on the axis, leading to complete destructive interference and a minimum in the intensity of the sound.

If the separation between the speakers continues to increase, the points of constructive interference will move closer together again, and the intensity of the sound will increase. The separation between the speakers at which the intensity of the sound will again be a maximum can be found using the following equation:

d = λ/2 + nλ

where d is the separation between the speakers, λ is the wavelength of the sound wave, and n is an integer that represents the number of half-wavelengths between the speakers.

At the maximum, the separation is an even multiple of half the wavelength, so we can use the formula above with n = 1. The wavelength can be found from the distance between the speakers at the minimum, which is 50 cm, and the distance at the maximum, which is 40 cm:

λ = 2(d_max - d_min) = 20 cm

Substituting λ and n into the formula gives:

d = λ/2 + nλ = 10 cm + 20 cm = 30 cm

Therefore, the sound intensity will be a maximum again when the separation between the speakers is 30 cm.

Answer:

Explanation:

The kinetic energy of an object can be found by using the formula

\(k = \frac{1}{2} m {v}^{2} \\ \)

m is the mass

v is the velocity

From the question we have

\(k = \frac{1}{2} \times 1200 \times {40}^{2} \\ = 600 \times 1600\)

We have the final answer as

Hope this helps you

Explanation:

A circuit breaker is an electrical switch designed to protect an electrical circuit from damage caused by overcurrent/overload or short circuit. Its basic function is to interrupt current flow after protective relays detect a fault.

Circuit breakers have been designed to detect when there is a fault in the electricity, so it will “trip” and shut down electrical flow. ... This detection is key to preventing surges of electricity that travel to appliances or other outlets, which can cause them to break down

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

Answer:

d. convention

Explanation:

hope this helped

Answer:

C; Rowing a boat

Explanation:

Hope this helps!      :3

Plz mark as brainliest!

At height h, on the left side of a loop, a stone is let free from its resting position. h = v^2/(2 x g) + r must the stone be at in order to stay on the track at the top of the loop.

For a stone to not fall off the track at the top of a loop, it must be traveling fast enough to follow the track's curvature. This means that the stone must have a certain minimum speed at the top of the loop in order to complete it from resting position. The minimum speed required for the stone to complete the loop can be calculated using the equation v = sqrt(gr), where v is the minimum speed, g is the acceleration due to gravity, and r is the radius of the loop. Therefore, the minimum height h for which the stone will not fall off the track at the top of the loop can be calculated using the equation h = v^2/(2*g) + r, where h is the minimum height, v is the minimum speed, g is the acceleration due to gravity, and r is the radius of the loop.

To know more about position please refer: https://brainly.com/question/9573597

#SPJ4

i think

Answer:

physics. The ______ is a systematic way to observe, experiment, and analyze the world. scientific method. The valid digits in a measurement are called the. significant digits.

Explanation:

truth'

The best estimate for the ratio of Power radiated per unit Area on Earth and Power radiated per unit Area on Venus is 1/16. The correct option is D.

Power radiated is directly proportional to the fourth power of Temperature at the surface and also to the cross-section area.

P = σ A T⁴

For 600 K at Venus, σ A T⁴ = σ A (600)⁴

For 300 K at Earth , σ A T⁴ = σ A (300)⁴

Comparing, we get

[σ A (300)⁴/ σ A (600)⁴ ] = 1/16

Thus, the the best estimate for the ratio is 1/16. The correct option is D.

Learn more about Power radiated.

https://brainly.com/question/1496553

#SPJ1

The half-life of hypothetical element  technetium-99 is 210,936 years.

Half-life of the hypothetical element From the graph provided in the question, the half-life of the hypothetical element can be obtained by finding the time taken for the element to reduce to half its original quantity. Here, it can be seen from the graph that the quantity of the element reduces from 40 to 20 on day 4. Therefore, the half-life of the hypothetical element is 4 days.2. Time taken for a sample to decay from 100 grams to 25 gramsIf the half-life of a given substance is 65 days, then the quantity of the substance reduces to half every 65 days. From 100 grams to 50 grams, it takes one half-life cycle. From 50 grams to 25 grams, it will take another half-life cycle.

Therefore, it will take two half-life cycles, which is 2 × 65 = 130 days, for a 100-gram sample of the substance to decay until there is only 25 grams of the radioactive material remaining.3. Half-life of a sample that decays from 200 grams to 50 grams in 60 minutesIt is given that the sample of radioactive isotopes takes 60 minutes to decay from 200 grams to 50 grams. To find the half-life, we need to determine how many times the sample has lost half of its mass, which tells you how many half-life cycles have occurred.At 30 minutes, the sample reduces to half its original quantity, which is 100 grams. At 45 minutes, it reduces to 50 grams, which is half of 100 grams. Therefore, it takes two half-life cycles to reduce from 200 grams to 50 grams in 60 minutes. Hence, the half-life of the isotope is 15 minutes.4. Half-life of technetium-99 that decays from 500.0 g to 62.5 g in 639,000 yearsIt is given that a 500.0 g sample of technetium-99 decays to 62.5 g of technetium-99 remaining in 639,000 years. We can use the half-life formula to find the half-life of technetium-99.t1/2 = (t × log2) / log(N0 / Nt) Where,t1/2 = half-life of the substanceN0 = initial quantity of the substance Nt = quantity of the substance left after time t (in years)t = time (in years)From the given data,t1/2 = (639000 × log2) / log(500.0 / 62.5)t1/2 = 210,936 years.

for such more questions on element  

https://brainly.com/question/30933074

#SPJ8

Answer:

The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object. As the force acting upon an object is increased, the acceleration of the object is increased. As the mass of an object is increased, the acceleration of the object is decreased.

Explanation:

hope it helps pls give me brainless

Answer:

Explanation: For the most part velocity is not zero if an object is accelerating. Since acceleration is the change in velocity over time, there has to be a change in velocity for something to accelerate. ... If the velocity is constant however, the acceleration is zero (because the velocity isn't changing over time).

An object with zero acceleration must have zero velocity. The given statement is true. As, acceleration is the change in velocity of an object.

Velocity is the rate of change of displacement of an object. Velocity is a vector quantity as it consists of both magnitude and direction of motion of an object.

Velocity = Displacement/ Time

Acceleration is the rate of change of velocity. Acceleration results when the velocity of an object changes. If an object is changing its velocity with respect to time, i.e. changing its speed or direction, then it is said to be in acceleration. Acceleration is also a vector quantity, it is just the change in a vector quantity that is velocity.

Acceleration = Velocity / Time

Learn more about Acceleration here:

https://brainly.com/question/12550364

#SPJ2

The correct option is (D). Repulsion between the two charges increases.

Coulomb's law, which states that the electrostatic force between two point charges separated by a distance (r) is given by: can be used to compute the electrostatic force between two point charges.

F = k × |Q ÷ q| / r²

Due to their similar charges and the fact that both charges are positive, they will resist one another. According to Coulomb's law, the electrostatic force increases as the distance (r) between the charges gets smaller. This indicates that as the two positive charges are pushed closer together, the repulsion between them becomes stronger.

Hence, the correct option is (D). Repulsion between the two charges increases.

To learn more about Charge, here:

https://brainly.com/question/28721069

#SPJ12

Answer:

c. covering

Explanation:

covering is just doing defence and is not illegal in basketball