Please answer the question below

To maintain the constant velocity of a 2-kg object moving horizontally at 4 m/s, no net force is required as per Newton's first law of motion.

The question asks how much net force is required to keep a 2-kg object moving horizontally at a constant speed of 4 m/s. In physics, especially when discussing Newton's laws of motion, if an object is moving at a constant velocity, the net force acting on it is zero. According to Newton's first law of motion (also known as the law of inertia), an object will continue to move at its current velocity unless acted upon by a net external force. Therefore, if the 2-kg object is moving horizontally at a steady speed and is not accelerating, the net force required to maintain that steady motion is 0 Newtons.

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Answer:

The result is only as precise as the least precise measurement used in the calculation.

Explanation:

Answer:

It must push 40 lbs of force to open the valve.

Explanation:

The momentum at one end of the pivot must be equal to the momentum at the other end. Assuming the 60 lbs of force (F1) is applied at 2 inches from the pivot (d1) and the upward force (F2) is applied at 3 inches from the pivot (d2), then:

F1*d1 = F2*d2

Solving for F2 we get:

F2 = F1*d1/d2

F2 = 60*2/3 = 40 lbs of force

Answer: 0.25 grams per milliliter

Explanation:

The formula to calculate the density is given by :-

[tex]\text{Density}=\dfrac{\text{Mass}}{\text{Volume}}[/tex]

We are given that the volume of liquid is 24.0 mL.

Mass = 6g

Now, the density of liquid is given by :-

[tex]\text{Density}=\dfrac{6}{24}\\\\\Rightarrow\ \text{Density}=0.25\ g/ml[/tex]

Hence, its density = 0.25 grams per milliliter.

Because of negative side the direction of Electrostatic force  will be right to left that means to the left

Magnitude of Electrostatic force will be = 1.0667 N

The electrostatic force  is an attractive and repulsive force between charged particles . The electric force between stationary charged bodies conventionally known as electrostatic force .

q1 = –4.0 µC

q2 = +6.0 µC

r = 0.45 m

k= 9 * 10 ^ 9

(E) Electrostatic force = k *q1* q2 / r^2

E = (9 * 10 ^ 9) *( –4.0) * ( +6.0)  / (0.45)^2

E = - 1066.67 * 10 ^ (-3)

Electrostatic force = - 1.0667 N

Because of negative side the direction of Electrostatic force  will be right to left that means to the left

magnitude of Electrostatic force will be = 1.0667 N

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Answer:

An inelastic collision, in contrast to an elastic collision, is a collision in which kinetic energy is not conserved due to the action of internal friction. In collisions of macroscopic bodies, some kinetic energy is turned into vibrational energy of the atoms, causing a heating effect, and the bodies are deformed.

Explanation:

Tarzan's speed at the bottom of the swing can be found using the conservation of energy principle, resulting in approximately 20.76 m/s.

To find Tarzan's speed at the bottom of the swing, we use the principle of conservation of energy. Initially, Tarzan has gravitational potential energy (GPE) when the vine is level. As he swings down, this potential energy is converted into kinetic energy (KE).

At the bottom of the swing, assuming no energy loss to friction or air resistance, all GPE has been converted into KE. The formula for potential energy is U = mgh, where m is mass, g is the acceleration due to gravity, and h is height. The formula for kinetic energy is KE = ½mv², where v is velocity. Setting GPE equal to KE and solving for v gives v = √(2gh).

Substituting the known values, g = 9.8 m/s² and h = 22 m, we get:

v = √(2 × 9.8 m/s² × 22 m) = √(431.2 m²/s²) ≈ 20.76 m/s.

Therefore, Tarzan's speed at the bottom of the swing would be approximately 20.76 m/s.

Final answer:

The metric system is based on a decimal system with fundamental units meter, kilogram, and second, allowing for easy conversions using powers of ten and consistent measurements for objects of all sizes.

Explanation:

The metric system is structured on a base-10 or decimal system, where each unit is a power of ten of the fundamental units for length, mass, and time, which are meter (m), kilogram (kg), and second (s), respectively. In this system, converting between units is as simple as moving the decimal point to the right or left. For example, 1 meter equals 100 centimeters and 1 kilogram equals 1000 grams, illustrating the system's reliance on multiples of ten.

Moreover, the metric system incorporates a set of prefixes to indicate multiples and submultiples based on factors of 10, such as kilo- (1000), centi- (1/100), and milli- (1/1000). This versatility allows easy conversions and ensures consistent measurements for objects of varying sizes, from very small (like a cell) to very large (like a planet).

Answer:

Parabolic

Explanation:

The projectile motion is the example of two dimensional motion under the influence of gravity.

The general equation of projectile motion is

y = x tan theta - gx^2/ 2u^2 cos^theta

It is the quadratic equation in x which shows that it is the equation of a parabola.

Final answer:

The pressure between a person and the ground when standing on both feet can be calculated using the formula: Pressure = Force / Area. By substituting the given values into the formula, we can determine the pressure to be 25000 Pa.

Explanation:

The pressure between a person and the ground when standing on both feet can be calculated using the formula:

Pressure = Force / Area

Given that the weight of the boy is 500 N and the total area of his feet is 200 cm², we can substitute these values into the formula:

Pressure = 500 N / 200 cm²

Now, convert the area to square meters to maintain consistent units:

Pressure = 500 N / (200 cm² x (1 m/100 cm) x (1 m/100 cm))

Pressure = 500 N / 0.02 m²

Pressure = 25000 N/m² or 25000 Pa

So, the pressure between the boy and the ground when he stands on both feet is 25000 Pa.

Space exploration has helped Florida's economy and inspires people to want to go to outer space.

The benefit of space exploration is that it has helped Florida's economy, made some people famous, and has inspired people to want to go to outer space. For example, the Kennedy Space Center in Florida has attracted tourism and created jobs, boosting the state's economy. Additionally, astronauts like Neil Armstrong and Buzz Aldrin gained fame for being the first humans to walk on the moon, which brought attention and interest to space exploration.

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During an earthquake or any ground movement, a seismograph would produce an output called seismogram in which we could see the recording of the motion of the ground in the three Cartesian axes (x, y, and z). A seismograph has a special device called seismometer that is extremely sensitive to up and down motions of the earth and this device can be understood by visualizing a weight hanging on a spring.

Since two earthquakes are producing different relative strength, therefore the correct answer to this would be:

“The seismograms produced during the two earthquakes will be very different. The stronger one will have a larger amplitude than the weaker one.”

Final answer:

A seismograph near the San Andreas fault will record larger deflections on the seismogram for a strong earthquake and smaller deflections for a weaker one, due to the higher amplitude of seismic waves. The Richter scale being logarithmic means significant differences in energy release between different magnitudes. Additionally, three-component seismographs enhance earthquake analysis by measuring three-dimensional motion.

Explanation:

A seismograph near the San Andreas fault that detects earthquakes of varying strengths would produce different seismograms for a very strong earthquake and a relatively weak one. The seismograph's recordings, known as seismograms, reflect the earthquake strength through the amplitude of the waves recorded. For a stronger earthquake, the seismic waves will have a greater amplitude, resulting in larger deflections on the seismogram, whereas a weaker earthquake will produce smaller deflections. Additionally, the patterns of P-waves (primary waves) and S-waves (secondary waves) captured by the seismograms are crucial for determining the epicenter of an earthquake by comparing arrival times recorded by multiple seismographs.

Since the Richter scale is logarithmic, the difference in magnitude between two earthquakes is significant, with each whole number increase on the scale representing a tenfold increase in amplitude of the seismic waves and roughly a thirtyfold increase in the released energy. The seismogram produced during a very strong earthquake would show considerably higher amplitudes and longer durations than the seismogram of a weaker earthquake.

Moreover, advanced seismograph stations with three-component seismographs can provide detailed information about the earthquake source by measuring motion in three perpendicular directions (east-west, north-south, and up-down), thereby contributing to a more comprehensive understanding of the earthquake's characteristics.

B) Having variables that are difficult or even impossible to control.

People in the four locations would complain about the taste and odor of the water due to the turbidity levels of the water.

Particulate matter levels beyond a certain threshold have an impact on light transmission, ecological productivity, recreational appeal, habitat quality, and lake filling rates. Increased sedimentation and siltation in streams have the potential to affect fish and other aquatic life habitats. Additional contaminants, including as metals and microorganisms, can cling to particles. As a result, turbidity readings can be used as a sign of possible pollution in a body of water.

Turbidity is a metric for a liquid's relative clarity. It is a measurement of the amount of light scattered by the components of water when light is shone through a water sample. It is an optical property of water.

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Answer:

The placement of effort force, resistance force, and fulcrum.

Explanation:

The placement of effort force, resistance force(which is the load to be moved), and fulcrum differentiates between the classes of levers.

Levers are divided into three classes and they are the first class, second class and third class lever. This machines are differentiated from one another depending on the position of their effort(E), Load applied(L) and the fulcrum (L).

For first class lever, the fulcrum is in between the load and the effort e.g a see-saw, scissors etc

For second class lever, the load is in between the fulcrum and the effort e.g a wheel barrow

For third class lever, the effort is in between the fulcrum and the load e.g a stapler

Answer:

d:extrusion

Explanation:

Extrusion has nothing to do with the formation of sedimentary rock, since it is a process of building objects with a defined and fixed cross section. The material is extracted using a die with the cross section to be made. This process allows the creation of complex cross sections with brittle materials, since the material only finds compression and cutting forces.

Answer:

the answer is -20 N i am doing the review right now and i got it right hope this helps man

Explanation:

Progression is the classic increase in the fitness of the individual which is essential to achieve fitness goal.

Further Explanation:

Respiratory and circulatory system works together as a coupled unit for delivering oxygen and nutrients to the other part of the body and take away carbon dioxide and waste from the body to support homeostasis. The main purpose of the cardiovascular system is to support the adequate blood flow and supply adequate amount of nutrient to all body tissue and cells and also help in regulating the body temperature.

During physical exercise, the oxygen demand of the muscle tissue increase by 15 to 25 time than normal or rest condition because the more energy is required. A hormone also helps in controlling a number of physiological reactions such as energy formation, reproductive processes, tissue growth and degradation of the muscle protein.

Progression is the classic increase in the fitness of the individual which is essential to achieve fitness goal. When an athlete starts its practice by running in the morning he complete the round in few min. but with each day and session he is able to cover more around in shorter time because he starts to overload himself with each session which is necessary to develop physical fitness.  

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Answer Details:

Grade: High School

Subjects: Health

Topic: Physical Fitness

Keywords:

Cardiovascular, exercise, respiratory, circulatory, nutrient, homeostasis, physical, hormones, physiological, degradation, anabolic, catabolic, energy.

Correct answer choices are :

A) Humus

E) Manure

D) Nitrogen

Explanation:

Soil fertility leads to the capability of a soil to support agricultural plant growth, i.e. to produce plant environment and occur in continued and steady yields of high quality. A fertile soil will include all the important nutrients for basic plant nourishment, as well as other nutrients required in smaller amounts.