A slender, uniform metal rod of mass M and length lis pivoted without friction about an axis through its midpoint andperpendicular to the rod. A horizontal spring, assumed massless andwith force constant k,is attached to the lower end of the rod, with the other end of thespring attached to a rigid support.
Find the torque tau due to the spring.

Answer:

Science of Genetics..

Explanation:

Through his careful breeding of garden peas, Gregor Mendel discovered the basic principles of heredity and laid the mathematical foundation of the "science of genetics".

Gregor Johann Mendel related to the science of genetics.

Gregor Johann Mendel was an Austrian monk and scientist born on July 20, 1822, and died on January 6, 1884. Mendel is known for his groundbreaking work on pea plants, which led him to discover the fundamental laws of inheritance, known as Mendelian genetics.

He conducted a series of experiments on pea plants in the mid-19th century, observing the transmission of traits from one generation to the next and discovering the principles of dominant and recessive inheritance. Mendel's work was largely unrecognized during his lifetime but later became the foundation of modern genetics and greatly influenced the development of the field of biology.

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When you brush your hair and scrape electrons from your hair, the charge of your hair becomes positive.

When you brush your hair, the bristles of the brush scrape electrons from your hair. This leaves your hair with a deficiency of electrons, or a positive charge, and the brush with an excess of electrons, or a negative charge.

The rubbing motion between your hair and the brush causes the transfer of electrons from your hair to the brush, creating a buildup of charge on the two surfaces.

This buildup of charge is called static electricity, and it can cause your hair to stand on end or make crackling sounds when you touch it.

The charge on your hair will remain positive until it comes into contact with another object that has a negative charge.

At that point, electrons will flow from the negative object to your hair, neutralizing the positive charge.

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Answer: C -- decreases with increasing altitude

Explanation:

A--g is different on other planets and objects like asteroids, etc. It is 9.8 m/s2 only on Earth

B--g acts on long distances, too, not just short

D--g is independent of the mass of the free falling object

C is correct.  The value of g decreases the higher you go in altitude

The change in internal energy of the woman would be 9050 J.

To calculate the change in internal energy (Î"U) of the woman, we need to use the first law of thermodynamics, which states that the change in internal energy of a system is equal to the heat transferred to or from the system plus the work done on or by the system.

In this case, the woman does 450 J of work and 9500 J of heat is transferred from her to the environment. We can assume that there is no other energy transfer to or from the woman (e.g. she does not consume any food).

Therefore, the change in internal energy (Î"U) is:

Î"U = Q - W
Î"U = 9500 J - 450 J
Î"U = 9050 J

The change in internal energy of the woman is 9050 J, which means that her internal energy decreases by this amount due to the work she does and the heat transferred to the environment.

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Answer:

the answer is a because I saw it in a syllabus

Answer:

just doing this so you can give brainliest to the other person

have a great day!

Explanation:

Answer:

I know that F=Gm1m2/r^2 or F=GMn/r^2 and G is like the universal gravitational constant so I hope this helps

The resulting input matrix will be a 3x3 matrix that Caleb needs to enter into his telescope to move it into the desired position.

To move the telescope to face the southwest and point upwards into the sky at an angle of 60 degrees, we need to find the input matrix that will rotate the initial vector (1, 0, 0) to the desired direction.

Let's break down the problem step by step:

First, we need to rotate the initial vector in the xy-plane to face the southwest direction. Since the telescope can rotate 360 degrees on the xy-plane, we can achieve this rotation by an angle of 45 degrees.

Next, we need to rotate the resulting vector from step 1 upwards into the sky at an angle of 60 degrees. This rotation will be in the xz-plane.

To obtain the input matrix for these rotations, we can multiply two rotation matrices:

R_xy = rotation matrix for the xy-plane rotation (45 degrees)

R_xz = rotation matrix for the xz-plane rotation (60 degrees)

The resulting input matrix will be the product of R_xy and R_xz.

Let's calculate the input matrix:

import numpy as np

# Convert angles to radians

theta_xy = np.radians(45)  # Rotation angle for xy-plane

theta_xz = np.radians(60)  # Rotation angle for xz-plane

# Rotation matrices

R_xy = np.array([[np.cos(theta_xy), -np.sin(theta_xy), 0],

                [np.sin(theta_xy), np.cos(theta_xy), 0],

                [0, 0, 1]])

R_xz = np.array([[1, 0, 0],

                [0, np.cos(theta_xz), -np.sin(theta_xz)],

                [0, np.sin(theta_xz), np.cos(theta_xz)]])

# Calculate the input matrix

input_matrix = np.matmul(R_xy, R_xz)

print("Input_matrix for Caleb's telescope:")

print(input_matrix)

The resulting input matrix will be a 3x3 matrix that Caleb needs to enter into his telescope to move it into the desired position.

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The acceleration of the bike is given as 1.67 m/s^2.

We know that the acceleration has to do with the rate of the change of the velocity of the object with time and we can be able to obtain the acceleration by the use of the Newton second law and that would now be able to give;

F = ma

F = force on bike

m = mass of the bike

a = acceleration

Then we can be able to substitute the values and obtain.

a = F/m

a = 150 N/90 Kg

a = 1.67 m/s^2

Thus is it going to have an acceleration of 1.67 m/s^2.

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Answer:

a.) volume = 70cm^3

b.) mass = 805 grams

Explanation:

see the explanation in attachment.

An angle formed between a body segment and a horizontal reference line is an example of an incline angle.

An incline angle refers to the angle formed between a body segment, such as a limb or a body part, and a horizontal reference line. It represents the deviation or inclination of the body segment from the horizontal plane.

In biomechanics and human movement analysis, measuring incline angles is essential for understanding joint angles, posture, and movement patterns. By determining the incline angles, researchers and professionals can assess the joint range of motion, identify movement abnormalities, and analyze the biomechanics of various activities.

In summary, an incline angle is an angle formed between a body segment and a horizontal reference line. It plays a crucial role in biomechanical analysis, allowing for a better understanding of joint movements and body mechanics in various contexts.

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Answer:

The tension of the rope is 1152 N

Explanation:

Force

Newton's second law states that the acceleration of an object is directly proportional to the net force and inversely related to its mass.

The law can be written as:

F = m.a

The rope must apply a force F to accelerate the car of m=960 Kg at \(a=1.2~ m/s^2\). Given the track is frictionless, all the force applied produces acceleration, thus:

\(F = 960~Kg\cdot 1.2~ m/s^2\)

F = 1152 N

The tension of the rope is 1152 N

Answer:

Thorium 227 (also known as Radioactinium)

Answer:

43.3 m/s.

Explanation:

Assuming the potential energy is due to the gravitational potential energy, we can use the conservation of energy to find the kinetic energy:

Total energy = Potential energy + Kinetic energy

Kinetic energy = Total energy - Potential energy

Kinetic energy = 300 J - 40 J = 260 J

However, we need to know the mass of the object to convert the kinetic energy to velocity. We can use the potential energy to find the mass:

Potential energy = mgh

40 J = m(9.81 m/s^2)(300 m)

m = 0.137 kg

Now we can use the kinetic energy to find the velocity:

Kinetic energy = (1/2)mv^2

260 J = (1/2)(0.137 kg)v^2

v^2 = (2*260 J) / 0.137 kg

v = 43.3 m/s (rounded to one decimal place)

Therefore, the kinetic energy is 260 J and the velocity of the object when it reaches the ground is 43.3 m/s.

Answer:

Electromagnets are widely used as components of other electrical devices, such as motors, generators, electromechanical solenoids, relays, loudspeakers, hard disks, MRI machines, scientific instruments, and magnetic separation equipment.Explanation:

Answer:

x×y=2×2=4. 4×z=4×3=12. 4+12=16

The momentum of the body is obtained as 10800 Kgm/s.

The momentum of the body could be obtained from the equation given as; p=mv

p = momentum

m = mass of the body

v = velocity

m = 1200-kilogram (kg)

v =  9 meters per second (m/s)

p = 1200-kilogram * 9 meters per second

p = 10800 Kgm/s

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Answer:

LOL! couldnt be me either bestieeeee

Answer:

-_-

Explanation:

i dont know What was XD??

Answer:

Nitrogen is N, neon is Ne

Answer:

Symbol of Nitrogen is N symbol of Neon Ne.

48 m/s in terms of km/h is 720.8 km/h. In terms of m/min is 2880 m/min, in terms of km/s is 0.048 km/s and in terms of km/min is 2.88 km/min.

To solve this question, we need to understand some terms. The unit of velocity is measured in m/s. It can be expressed in different units of velocity.

1 km (kilometer) = 1000 meter

1 h (hour) = 3600 seconds

1 minutes = 60 seconds

To convert m/s into km/h,

48 m/s * 3600/1000 =  172.8 km/h

To convert m/s into m/min,

48 m/s * 60 = 2880 m/min

To convert m/s into km/s,

48 m/s ÷ 1000 = 0.048 km/s

To convert m/s into km/minutes,

48 m/s * 60 / 1000 = 2.88 km/min

Therefore, the 48 m/s expressed is 172.8 km/h, 2880 m/min, 0.048 km/s and 2.88 km/min.

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48 m/s is equivalent to  172.8 km/h, 2880 m/min, 0.048 km/s, and 2.88 km/minute.

To express 48 m/s in different units of velocity:

km/h (kilometers per hour):

To convert m/s to km/h, we can use the conversion factor of 3.6 since 1 m/s is equal to 3.6 km/h.

48 m/s * (3.6 km/h / 1 m/s) = 172.8 km/h

Therefore, 48 m/s is equivalent to 172.8 km/h.

m/min (meters per minute):

To convert m/s to m/min, we can use the conversion factor of 60 since there are 60 seconds in a minute.

48 m/s * (60 m/min / 1 s) = 2880 m/min

Therefore, 48 m/s is equivalent to 2880 m/min.

km/s (kilometers per second):

Since 1 kilometer is equal to 1000 meters, to convert m/s to km/s, we divide the value by 1000.

48 m/s / 1000 = 0.048 km/s

Therefore, 48 m/s is equivalent to 0.048 km/s.

km/minute (kilometers per minute):

To convert m/s to km/minute, we first need to convert m/s to km/s (as calculated in the previous step) and then multiply by 60 to convert seconds to minutes.

0.048 km/s * 60 = 2.88 km/minute

So, 48 m/s is equivalent to 2.88 km/minute.

Hence, 48 m/s is equivalent to approximately 172.8 km/h, 2880 m/min, 0.048 km/s, and 2.88 km/minute.

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The coefficient of kinetic friction between Thumper and the ice is determined as 0.1.

The coefficient of kinetic friction between Thumper and the ice is determined as follows;

μk = a/g

where;

a = v/t

a = 8/12

a = 0.667 m/s²

μk = a/g

μk = 0.667/9.8

μk = 0.1

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Answer:

10 million joules or 10,000 KJ

Explanation:

Work= Force x Displacement

convert 5km into meters -5km=5000m

W= 2000N x 5000m

w=10,000,000 Joules

or 10,000KJ

Answer:

gravity

Explanation:

The electric potential relative to zero at infinity at the center of the square because of the four charges is found to be 4.16 x 10⁴ v.

The distance from the center of square and the magnitude of the charges are same. So, we can find the electric potential of one charge and then multiply it by 4 to get the final answer.

The electric field at the center relative to infinity,

v = -Kq/r, r is the distance of the charge and the center, q is the charge and K is the constant. q = 2 x 10⁻⁶, K = 9 x 10⁹ and r = 1.72m.

Putting all the values,

v = - 9 x 10⁹ x 2 x 10⁻⁶/1.72

v = 1.04 x 10⁴.

For all the charges,

V = -4v

V = 4.16 x 10⁴ v.

So, the electric potential is found to be 4.16 x 10⁴ v.

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In this case, a body of mass 5 kg kept at a height of 10 m. So, the potential energy is given as 500 J.

An object's potential energy is its stored energy. This energy has the capacity to be productive. An object's potential energy is provided by gravity. Gravity's downward force is the source of this potential energy.

The acceleration brought on by gravity is known as the gravitational constant, or g. On Earth, this acceleration is equivalent to 10 metres per second. PE = mgh is the equation for potential energy resulting from gravity. The object's potential energy declines and its kinetic energy rises as it approaches the ground.

Potential Energy = 5 x 10 x 10 = 500J.

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Answer:

1) Use multiple instruments to measure

2) Take several measurements

3) Control the other variables delicately  

4) Be meticulous when measuring

A) 4π radians did the carousel rotate through.

B) v=rω, v =2*20 = 40 m/s is the tangential velocity of the carousel at a point 2 m from the center of the carousel.

C) α =ω²r = 20²× 5 = 2000 rad/s² is the angular acceleration of the carousel during this time.

D)  the tangential acceleration of the carousel at a point on the outside of the platform is zero cause a(t) = r dω/dt change in angular velocity is zero after it reaches 20 rad/s.

A carousel, also known as a merry-go-round (international), roundabout (British English), or hurdy-gurdy (an archaic phrase in Australian English), is a type of amusement attraction that consists of a spinning circular platform with seats for passengers. Traditional "seats" are rows of wooden horses or other animals set on poles, many of which are moved up and down by gears to mimic galloping to the tune of looping circus music. carousel rotates with a particular velocity.

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When the difference in energy is small, the wavelength of the photon is large and  if the difference in energy is large, the photon's wavelength is short.

In quantum mechanics, when an electron transitions from a higher energy level to a lower one, it emits a photon, and when an electron absorbs a photon, it transitions from a lower energy level to a higher one. The energy of the photon is determined by the difference in energy between the two levels involved, which is also proportional to the frequency (f) and inversely proportional to the wavelength (λ) of the photon.

∆E = hf = hc/λ where h is Planck's constant and c is the speed of light. Keeping the ending level at 2 and trying different starting orbits, the difference in energy will be smaller if the starting orbit is closer to the ending orbit. As a result, the photon emitted or absorbed will have a lower energy, lower frequency, and longer wavelength.

When the difference in energy is small, the wavelength of the photon is large. As a result, the photon's energy and frequency are lower. Similarly, if the difference in energy is large, the photon's wavelength is short. This also means that the photon has a higher frequency and energy.

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Answer:

a) Time = 2.67 s

b) Height = 35.0 m

Explanation:

a) The time of flight can be found using the following equation:

\( x_{f} = x_{0} + v_{0_{x}}t + \frac{1}{2}at^{2} \)   (1)

Where:

\( x_{f}\): is the final position in the horizontal direction = 80 m

\( x_{0}\): is the initial position in the horizontal direction = 0

\(v_{0_{x}}\): is the initial velocity in the horizontal direction = 30 m/s

a: is the acceleration in the horizontal direction = 0 (the stone is only accelerated by gravity)

t: is the time =?  

By entering the above values into equation (1) and solving for "t", we can find the time of flight of the stone:  

\( t = \frac{x_{f}}{v_{0}} = \frac{80 m}{30 m/s} = 2.67 s \)

b) The height of the hill is given by:

\( y_{f} = y_{0} + v_{0_{y}}t - \frac{1}{2}gt^{2} \)

Where:

\( y_{f}\): is the final position in the vertical direction = 0

\( y_{0}\): is the initial position in the vertical direction =?

\(v_{0_{y}}\): is the initial velocity in the vertical direction =0 (the stone is thrown horizontally)            

g: is the acceleration due to gravity = 9.81 m/s²

Hence, the height of the hill is:

\( y_{0} = \frac{1}{2}gt^{2} = \frac{1}{2}9.81 m/s^{2}*(2.67 s)^{2} = 35.0 m \)  

I hope it helps you!

The two balls have the same energy when they land, hence the ball with mass 4m is moving at a speed of v/2.

Speed is defined as the ratio of the distance traveled to the time required to cover that distance. Speed is a scalar since it just has a vector and no magnitude.

Normal speed: The ratio of an object's total distance traveled to the whole time it took it to cover that distance is its average speed. Instantaneous speed: An object's instantaneous speed is the speed it is moving at at any given time while it is moving at a variable speed.

Under constant acceleration,

the distance an object moves is given by d = 0.5 A T^2

d = 0.5 A (2T)^2 d = 0.5 A 4T^2 d

= 2AT^2 and 2AT^2/(0.5 AT^2)

= 2/0.5 = 4

kinetic energy is E = 0.5MV^2

Mass = M, velocity = 2V

Second object. Mass = 4M,

velocity = V Kinetic energy

first object is: KE = 0.5M(2V)^2 = 0.5M4V^2 = 2MV^2 Kinetic energy

KE = 0.5 4MV2 = 2MV2 is the second object. They are also the same.

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