The period of your simple pendulum on earth is 0.2 s. You found out that the period of your simple pendulum in a certain planet is 0.1 s. What is the acceleration due to gravity on this planet?

Answer:

2g

Explanation:

A half-life means after a certain amount of time, half of that substance will be gone/changed after that time.

So, we divide the 16g sample in half 3 times.

16 ÷ 2 = 8

8 ÷ 2 = 4

4 ÷ 2 = 2

There will be 2g of the radioactive sample remaining after three half lives.

(hope this helps can i plz have brainlist :D hehe)

Explanation:

a) i) Calculation of the friction force:

The friction force can be determined using the equation:

friction force = coefficient of friction * normal force

The normal force is equal to the weight of the object, which can be calculated as:

normal force = mass * gravitational acceleration

where the gravitational acceleration is approximately 9.8 m/s².

normal force = 75 kg * 9.8 m/s² = 735 N

friction force = 0.4 * 735 N = 294 N

ii) Calculation of the acceleration of the body:

Now, we can calculate the acceleration using Newton's second law:

net force = mass * acceleration

Since the applied force and the friction force act in opposite directions, the net force can be calculated as:

net force = applied force - friction force

net force = 300 N - 294 N = 6 N

mass = 75 kg

6 N = 75 kg * acceleration

acceleration = 6 N / 75 kg = 0.08 m/s²

b) Explanation:

In part (a), we calculated the friction force to be 294 N and the acceleration of the body to be 0.08 m/s². The positive acceleration indicates that the body is moving in the direction of the applied force.

The friction force opposes the motion of the body and acts in the opposite direction to the applied force. In this case, the applied force of 300 N is greater than the friction force of 294 N. As a result, the net force acting on the body is 6 N in the direction of the applied force.

The small net force of 6 N, compared to the body's mass of 75 kg, results in a relatively low acceleration of 0.08 m/s². This indicates that the body will accelerate slowly in the direction of the applied force due to the presence of friction.

Overall, the friction force and the resulting acceleration of the body are determined by the coefficient of friction (μ) and the mass of the object. In this case, the body experiences a relatively high friction force, leading to a small acceleration.

Answer:

thank u for the happiest year of my life

The slope increases or decreases downstream, are less common and do not accurately represent the typical longitudinal profile of a streambed.

The sketch that best represents the longitudinal profile of the slope of a streambed is option A. In this case, the slope is constant and steep downstream.

This means that the streambed maintains a consistent, steep gradient as it progresses in the downstream direction. This profile is commonly associated with youthful streams or those in mountainous regions, where the force of gravity allows the water to flow rapidly down steep slopes.

Option B, where the slope is constant and shallow downstream, is more characteristic of mature or old-age streams.

Options C and D, where the slope increases or decreases downstream, are less common and do not accurately represent the typical longitudinal profile of a streambed.

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Answer:

sound

Explanation:

but im not exactlly sure so sorry if its wrong.

Answer:

It's Surface wave

Explanation: It travels in a circular motion. The particles travel both parallel and perpendicular in the direction of the wave-

Answer:

protected under students first amendment rights

Explanation:

did the studyisland :)

The ball's initial velocity is 25.9m/s

A table's top is horizontally rolled off by a ball. The ball hits the ground at a final velocity of -3.5 m/s after 3 seconds. (Presume that a=-9.8 m/s2)

from above statement we got

final velocity= -3.5 m/s.

acc= -9.8 m/s²

t=3 seconds

now:

we will use kinematic equation

v=u+at, in this v is final velocity, u is initial velocity,t is time and a is acc

now put all the given values in  kinematic equation

-3.5 = u+( -9.8)(3 )

-3.5=u-29.4

u=25.9m/s

so the  initial velocity is  25.9m/s

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SMM2 refers to the Standard Method of Measurement 2. It is a document that specifies the method and processes used in measuring buildings and civil engineering works. SMM2 is commonly used in the construction industry.

The following are explanations of the clauses under Standard Method of Measurement 2 (SMM2):

i. D.10: This clause under SMM2 relates to the painting of metal and timber surfaces. It stipulates that when painting the surfaces of timber or metal, the preparation of surfaces and application of paint must conform to manufacturer specifications. It also specifies that the paint must be applied using a brush, roller, or spray. The clause then goes on to outline specific measurements for the thickness of paint coating to be applied on surfaces.

ii. D.12.4: This clause under SMM2 refers to the construction of walls using concrete blocks. It states that the concrete blocks used should have a minimum density of 1500 kg/m3. It also outlines specific measurements for the thickness of the mortar to be used for bonding the blocks together. The clause further specifies the measurement of the joint thickness between blocks.

iii. D.12.6: This clause under SMM2 refers to the rendering of walls with a cement mortar mix. It specifies that before rendering, the surface of the wall must be clean, dry, and free of debris. It also outlines specific measurements for the thickness of the rendering to be applied to the wall. The clause then stipulates that the rendering should be finished with a smooth surface that conforms to the architect's specifications.

iv. D.12.8: This clause under SMM2 refers to the painting of interior plastered walls. It stipulates that the preparation of surfaces and application of paint must conform to manufacturer specifications. It also specifies that the paint must be applied using a brush, roller, or spray. The clause then goes on to outline specific measurements for the thickness of paint coating to be applied on surfaces.

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Answer:to protect an electrical circuit from damage caused by excess current from an overload or short circuit.

Explanation:

The statement best describes the purpose of the experiment is A ) To relate the type of box material to the temperature of air within the box

Here, two boxes of same size is exposed to sunlight for the same amount of time. The only different factor is the material of the box. So, only factors relating to the material of box might change. The temperature of air inside the box will change due to the material of box.  

The glass allows up to 90 % of visible light and 72 % of UV light to pass through whereas plastic does not allow UV light to pass through. So there will be a temperature difference between the air in two boxes made of glass and clear plastic.

Therefore, the purpose of this experiment is to relate the type of box material to the temperature of air within the box ( A )

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Answer: D

Explanation: I saw it in a bill nye video.

Answer:x rays are electromagnetic waves.

x rays are transverse waves

x rays travel at the speed of light

Explanation:

Answer:

4 m/s in negative acceleration

Explanation:

Acceleration = V- U/t

Where V is the final velocity

U is the initial velocity and t is the time given.

U = 65 m/s

V= 25 m/s

T= 10 seconds

Acceleration= (25m/s - 65m/s)÷10secs

= - 40/10

= -4m/s^2

Hence, it has a negative acceleration.

Answer:

A. negative acceleration of 4 m/s2

Hope this helps!

Explanation:

The frequency of the object's motion is 1/19 Hz

Given that an object moves around a circle of radius 10 meters in 19 seconds.

We need to find the frequency of the object's motion.

Formula for the frequency of the object's motion

Frequency of the object's motion is defined as the number of cycles completed by an object in one second. It is denoted by "f" and measured in hertz (Hz).

f = 1/Twhere,T is the time taken by the object to complete one cycle.

We have the radius of the circle, not the diameter or circumference of the circle.

Therefore, we need to find the circumference of the circle using the radius of the circle.

Circumference of the circle = 2πr= 2 x π x 10 = 20π

The object completes one full cycle to come back to its original position after it moves around the circle.

So, the time taken by the object to complete one cycle (T) = 19 seconds

Therefore, the frequency of the object's motion,f = 1/T= 1/19 Hz

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According to Newton's second law of motion, acceleration is directly proportional to the net force applied to an object and inversely proportional to its mass. Therefore, in order to have the smallest acceleration, we would need to have the smallest net force applied to the object and/or the largest mass.

So, the set of conditions that would result in the smallest acceleration are:

Smallest net force: If the net force applied to an object is small, it will result in a smaller acceleration. For example, if a car is moving at a constant speed on a level road, the net force on the car is zero, and the acceleration is also zero.

Largest mass: If the object has a large mass, it will require a larger force to produce the same acceleration.

Answer:

0

∘

C=273.16

∘

K

0

∘

K=−273.16

∘

C

9

F−32

=

5

C

=−

5

273.16

⇒F=32+9×(−

5

273.16

)=−459.67

∘

F

Explanation:

hope it's helps you..

The given expression can be written in an expanded form as 4,350,000

Given expression:

\(4.35 \times 10^6\)

To find:

To expand the given expression, multiply 4.35 by 1,000,000

\(= 4.35 \times 1,000,000\)

move the decimal point six (6) places to the right and you will obtain the following result.

\(= 4,350,000\)

Therefore, the expanded form of the expression is 4,350,000

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2.1.2) When temperature decreases, the material may decrease in size, 2.2) If a material is allowed to change in size, it experiences compression stress.

2.1.2 Temperature decrease: When the temperature of a material decreases, one possible effect is that the material may decrease in size. This happens because when the temperature decreases, the molecules in the material slow down and move closer together.

2.2 If a material is allowed to change in size, it can experience different types of stress. One type of stress that can be induced is compression stress. Compression stress occurs when a force is applied to the material, causing it to be squeezed or compressed.

Another type of stress that can be induced when a material changes in size is tension stress. Tension stress occurs when a force is applied to the material, causing it to be stretched or elongated. This happens because the material is trying to resist the force and return to its original size.

In some cases, when a material changes in size, no stress may be induced.

Finally, shear stress is another type of stress that can be induced when a material changes in size.

In summary, when a material changes in size, it can experience compression stress, tension stress, shear stress, or no stress depending on the external forces acting upon it.

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Answer:

Explanation:

A simple pendulum consists of a mass (usually represented as a small object or bob) attached to a string or rod of negligible mass. The mass is free to swing back and forth under the influence of gravity.

In the figure, the point of suspension is denoted by "O," and the mass (bob) is represented by the small circle. The string or rod is represented by the vertical line connecting the point of suspension to the bob.

Amplitude:

The amplitude of a pendulum refers to the maximum displacement or swing of the bob from its equilibrium position. In the figure, the amplitude can be represented by the angle formed between the vertical position and the position of the bob when it swings to its maximum distance on one side. It is usually denoted by the symbol "A."

Effective Length:

The effective length of a pendulum refers to the distance from the point of suspension to the center of mass of the bob. It represents the distance over which the mass swings back and forth. In the figure, the effective length can be measured as the length of the string or rod from the point of suspension to the center of the bob. It is usually denoted by the symbol "L."

It is important to note that the amplitude and effective length of a simple pendulum affect its period of oscillation (the time taken for one complete swing). The relationship between these parameters and the period can be described by mathematical formulas.

Overall, the simple pendulum is a fundamental concept in physics and provides a simplified model for understanding oscillatory motion and the principles of periodic motion.

Explanation:

Basalt is not a metamorphic rocks

Dennis, 60 feet in 0.5 seconds is the average speed of a pitcher's fastball. So, the correct option is (A).

Average speed is defined as the total distance covered by the object in a particular time interval. Average speed is a scalar quantity which is represented by the magnitude and not the direction.

The formula for average speed is found by calculating the ratio of the total distance traveled by the body to the time taken to cover that distance which is expressed as:

Average speed= Total distance travelled/ Time taken

The unit of the average speed is meter/second.

In the above given information, the pitcher's fastball average speed of Dennis is 120

Thus, Dennis, 60 feet in 0.5 seconds is the average speed of a pitcher's fastball. So, the correct option is (A).

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There is a total of 4 rock bands playing simultaneously at this level to have a pain threshold of (120dB).

The decibel (dB) is a logarithmic unit used to measure sound intensity. Each 10 dB increase in sound intensity corresponds to a 10-fold increase in sound power. Therefore, since the pain threshold is 120 dB, a 10 dB increase from 106 dB is equal to a 10-fold increase in sound power.

Since each individual band is already producing 106 dB, the 10 dB increase would require 4 bands (a 10-fold increase) to reach the pain threshold.

This is because a 10 dB increase from 106 dB would bring the total sound intensity to 116 dB, and a further 4 dB would be required to reach the pain threshold of 120 dB.

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Answer:

A attractive field pulls and pushes electrons in certain objects closer to them, making them move. Metals like copper have electrons that are effortlessly moved from their circles. In case you move a magnet rapidly through a coil of copper wire, the electrons will move - this produces power.

Metals' complex structures account for their high melting and boiling temperatures as well as their conductivity. A metal's characteristics can be changed by adding another substance to it to create an alloy.

Of all the metals, silver has the highest electrical conductivity. In actuality, silver is the standard by which conductivity in all other metals is measured. Silver ranks 100 on a scale of 0 to 100, followed by copper at 97 and gold at 76.

Due to the fact that the atoms in metals form a matrix through which outside electrons can easily travel, metals are efficient conductors of both electricity and heat. They produce a sea of electrons surrounding the positive nuclei of the interacting metal ions rather than orbiting their individual atoms.

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This can be expressed as,T2 = (M + m)aT1 = Mg/2where,T2−T1= (M + m)a − Mg/2 Solving the above equations will give the value of α and then we can find out the final velocity of the platform.

Here's the solution to the given problem: Let the origin of our coordinate system be located at the center of the platform. We can assume that there is no friction between the platform and the ground. If v  Rw, the woman will collide with the center of the platform after the platform stops moving because it is not able to move with the required speed to reach the center of the platform before it stops. The net torque about the origin, assuming that the angular momentum is conserved, is Iα = τ, or, assuming that the angular momentum is conserved,T2−T1=IwoR2wR2+mr2αT2 = Mg/2 + Mv/RT1 = (M + m)g/2Let a be the speed of the platform just after the woman reaches the center, which is given by a = v + αr. This can be expressed as,T2 = (M + m)aT1 = Mg/2where,T2−T1= (M + m)a − Mg/2Solving the above equations will give the value of α and then we can find out the final velocity of the platform.

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Answer:

the magnitude will not be equal coz point a us greater than point B

Answer:

C

Explanation:

Answer:

A

because volcano can produce sediment and

erodus rock

By contrasting a substance's melting point with the melting points of other known chemicals, melting point determination can be used to identify a substance.

The temperature at which a substance transitions from a solid to a liquid form is known as the melting point of that substance. A pure substance has a sharp melting point and melts at a specific temperature, whereas an impure substance has a lower melting point and melts over a wider temperature range.

Precautions to be taken while using a melting point apparatus are -

1. To find the melting point of a sample, use a dry, powdered sample.

2. Maintain a level distance between the thermometer and the lower end of the capillary tube.

3. There shouldn't be any significant air spaces between the solid particles and the powder during packing.

4. To keep a constant temperature, the bath should be gradually heated and stirred often.

5. Neither the bottom of the beaker nor the sides of the thermometer's bulb or the capillary attached to it should contact.

6. When connecting the capillary tube to the thermometer, avoid using rubber bands.

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A longitudinal wave has all of these unlike a transverse wave.

Transverse waves and longitudinal waves are the two types of mechanical waves. In a transverse wave, the disturbance moves perpendicular to the direction of the wave, whereas in a longitudinal wave, the disturbance moves parallel to the direction of the wave.

A longitudinal wave has all the features that a transverse wave has. A wave’s features are as follows: amplitude, frequency, wavelength, and velocity. The amplitude is the maximum displacement of a wave, which is the distance between the equilibrium position and the crest.

The frequency is the number of waves that pass a given point per second. The wavelength is the distance between two adjacent peaks or two adjacent troughs of a wave. The velocity of a wave is the rate at which it propagates. Hence, it is incorrect to say that a longitudinal wave has no amplitude, frequency, wavelength, or velocity. The answer is "e. A longitudinal wave has all of these."

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