a 0.150 kg block of ice is placed against a horizontal, compressed spring mounted on a horizontal tabletop that is 1.40 m above the floor. the spring has force constant 1950 n/m and is initially compressed 0.045 m . the mass of the spring is negligible. the spring is released, and the block slides along the table, goes off the edge, and travels to the floor. if there is negligible friction between the block of ice and the tabletop, what is the speed of the block of ice when it reaches the floor?

Answer:

D.

Object A will move in the direction of object B's velocity; object B will continue in that direction with a final speed less than its initial speed.

Explanation:

Conservation of Momentum. For every action will have an equal and opposite reaction. Object B will hit Object A transferring it's momentum to Object A and Object A will transfer it's momentum to Object B but since Object B is 5 times larger than Object A, Object A will only push back on Object B with a fraction of the force that Object B is pushing on Object A. Like a Bowling Ball when it hits bowling pins. The bowling ball continues to move in its direction but at a slower speed because it transferred speed to the bowling pins.

Answer:

so the answer is The height of spring minus from the length of metre rule =25

Under reversed polarity, we found the results to be exactly in current direction, while the current maximums were 0, negative, positive, opposite and the same.

What is reversed polarity?

Reversed polarity refers to a situation where the positive and negative terminals of an electrical circuit are connected in reverse order. This can happen accidentally due to improper wiring, or intentionally as a means of reversing the direction of current flow.

Reversed polarity can cause electrical equipment to malfunction, overheat, or fail altogether. It can also create safety hazards such as electric shock, fire, or explosion. Therefore, it is important to ensure proper polarity in electrical circuits and devices.

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Answer:

Explanation:

0
negative
positive
opposite
the same

To answer your question, we need to use the conservation of momentum and conservation of energy principles. Since the collision between the two pendula is elastic, the total momentum and total energy before and after the collision remains the same.

Let's assume that the initial velocity of the bowling ball pendulum is v and the final velocity of both pendula after the collision is v'. According to conservation of momentum,
(m_bowlingball * v) = (m_bowlingball * v') + (m_golfball * v')
where m_bowlingball and m_golfball are the masses of the bowling ball and golf ball pendula respectively.
Similarly, using conservation of energy,
(1/2 * m_bowlingball * v^2) = (1/2 * m_bowlingball * v'^2) + (1/2 * m_golfball * v'^2) + m_golfball * g * h
where g is the acceleration due to gravity and h is the maximum height reached by the golf ball after the collision.
Solving these two equations for v' and h, we get:
v' = (m_bowlingball - m_golfball)/(m_bowlingball + m_golfball) * v
h = (m_bowlingball^2/(m_bowlingball + m_golfball)^2) * (v^2/2g)
Substituting the values given in the problem, we get:
v' = (16/21) * v
h = (256/441) * (v^2/2g)
Therefore, the approximate maximum height that the golf ball reaches after the collision is (256/441) * (v^2/2g), which is approximately 0.58 times the height from which the bowling ball was released.
Note: The exact height reached by the golf ball may vary slightly due to friction and air resistance.

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Physical properties are used to identify and describe matter. They include

The goal of the lab is to investigate the relationship between density and buoyancy. The lab aims to determine how different objects or substances behave in fluids and understand the principles of density and buoyancy through experimental observations and calculations.

The goal of the lab or the question being addressed in the lab report is to investigate and understand the concepts of density and buoyancy. Density refers to the measure of how much mass is contained within a given volume, while buoyancy refers to the upward force exerted on an object submerged in a fluid, such as water or air.

The lab report aims to explore the relationship between density, mass, and volume by conducting experiments and analyzing data. It may involve measurements of different objects or substances, determining their masses and volumes, and calculating their densities. The report may also involve experiments related to buoyancy, such as determining the buoyant force on an object and investigating factors affecting buoyancy.

By conducting the lab and analyzing the obtained results, the lab report aims to provide a deeper understanding of these fundamental concepts in physics and to demonstrate the principles of density and buoyancy through practical experimentation. The report may also include discussions of the significance and applications of density and buoyancy in various fields, such as engineering, architecture, and fluid dynamics.

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Answer:

Psychiatrists are medical doctors, psychologists are not. Psychiatrists prescribe medication, psychologists can't. Psychiatrists diagnose illness, manage treatment and provide a range of therapies for complex and serious mental illness. Psychologists focus on providing psychotherapy (talk therapy) to help patients.

Explanation:

Answer:

Psychiatrists are medical doctors, psychologists are not. Psychiatrists prescribe medication, psychologists can't. Psychiatrists diagnose illness, manage treatment and provide a range of therapies for complex and serious mental illness. Psychologists focus on providing psychotherapy (talk therapy) to help patients.

Explanation:

If the male skull is found to have no visible suture lines, the approximate age of the skull when the person died is more likely to be 25 or 40 years old.

Suture lines are the areas where the cranial bones have fused together. In infants and young children, these suture lines are visible and allow for growth of the skull. As the person grows, these sutures slowly fuse together. Therefore, if a skull has no visible suture lines, it could suggest that the person was an adult at the time of death.

However, it is not possible to determine the exact age of the skull based solely on the absence of suture lines. Further analysis and examination, such as dental records, DNA testing, and other forensic methods, may be needed to identify the person and determine their age at the time of death.

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The minimum speed at which a car can negotiate this banked curve, even in the complete absence of friction, is approximately 18.8 m/s.

The speed at which a car can negotiate a banked curve with a given radius and banking angle, even in the complete absence of friction, is called the "no-slip" or "minimum" speed.

here,

The gravitational force acting on the car is balanced by the normal force provided by the banked surface, and the car moves in a circular path with no slipping or skidding.

The minimum speed for a car to negotiate a banked curve can be found using the following equation:

v = √(r * g * tan(θ))

In this case, the radius of the curve is 75.0 m, and the banking angle is 15.0 degrees or 0.262 radians. Plugging these values into the equation, we get:

v = √(75.0 * 9.8 * tan(0.262))

v ≈ 18.8 m/s

Therefore, the minimum speed at which a car can negotiate this banked curve, even in the complete absence of friction, is approximately 18.8 m/s.

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Answer:

To calculate the minimum frequency of radiation for which electrons can be emitted, we need to use the equation E = hf, where E is the maximum energy of the emitted electrons, h is the Planck constant, and f is the frequency of the radiation. Substituting the given values, we get:

E = hf

1.2 x 10^19 J = (6.6 x 10^34 Js)(f)

f = 1.8 x 10^15 Hz

Therefore, the minimum frequency of radiation for which electrons can be emitted is 1.8 x 10^15 Hz.

Explanation:

To calculate the minimum frequency of radiation for which electrons can be emitted, we need to use the equation E = hf, where E is the maximum energy of the emitted electrons, h is the Planck constant (6.6 x 10^34 Js), and f is the frequency of the incident radiation.

Plugging in the given values, we have E = (6.6 x 10^34 Js)(5.4 x 10^14 Hz). Solving for f, we get f = E/h = (1.2 x 10^19 J)/(6.6 x 10^34 Js) = 1.8 x 10^-15 Hz. This is the minimum frequency of radiation for which electrons can be emitted from the metal surface.

Answer:

Acceleration acts always in the direction. Of the displacement. Of the initial velocity.

Answer:

1.6 m/s

Explanation:

Answer:The principle that states that a change in pressure at any point in a fluid in a closed container is transmitted equally and unchanged in all directions throughout the fluid is known as Pascal's principle.

Explanation:.

Purple LED lights are very effective at helping plants grow.

What is an LED lamp?

An LED lamp, often known as an LED light bulb, is a type of electric light that emits light by employing light-emitting diodes (LEDs). LED lamps are substantially more energy-efficient than identical incandescent bulbs and can outperform most fluorescent lamps. The most efficient LED bulbs on the market have efficiency of 200 lumens per watt (Lm/W). Commercial LED bulbs have a far longer lifespan than incandescent lamps. To function from mains power lines, LED lights require an electronic LED driver circuit, and losses in this circuit mean that the lamp's efficiency is lower than the efficiency of the LED chips it utilizes. To be compatible with light dimmers designed for incandescent lamps, the driver circuit may require additional characteristics.

Purple LED lights are quite good in assisting plant growth. Because red and blue wavelengths of light, which are included in many LED grow lights, have been discovered to be crucial in promoting plant development, utilizing purple LED lights isolates these two hues to optimize the advantages of your grow light.

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The momentum change experienced by the object is 3.6 Ns.

This can be defined as the product of mass and change in velocity. change in momentum from newton's second law of motion is also the product of force and time.

To calculate the change momentum of the object, we apply the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the change in momentum of the object is 3.6 Ns

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Answer:

No

Explanation:

Answer:

15.7 ; 78.5

Explanation:

Given that

The mechanic use a screw driver to install 1⁄4-20 UNC bolt

And, the effort force is 5lb

We need to find out the mechanical advantage

And, the resistance force

As we know that

The Mechanical advantage of a screw = Circumference ÷ pitch

where,  

Circumference = pi × d

 pi = 3.142, D = diameter

So,  

Circumference = 3.142 × (1 ÷ 4)

= 0.785 in

Now

Pitch = 1 ÷ TPI

Here TPI (thread per inch) = 20

Pitch = 1 ÷  20 = 0.05

So,

Mechanical advantage = 0.785 ÷ 0.05

= 15.7

Now Resistance force if effort force is 5lb

We know that

Mechanical advantage = Fr ÷ Fe

Here

Fe = effort force, Fr = resistance force

15.7 = Fr ÷ 5

Fr = 15.7 × 5

= 78.5 lbs

The distance from the axis of the force applied is 2.05 m.

The distance from the axis of the force applied is calculated as follows;

The formula for torque;

τ = Fr

where;

Another formula for torque is given as;

τ = Iα

where;

τ = (mr²)α

τ = (25 kg x (0.925 m)²) x (1.84 rad/s²)

τ = 39.36 Nm

The distance is calculated as;

r = τ/F

r = ( 39.36 Nm ) / (19.2 N)

r = 2.05 m

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This means that the roller coaster is decelerating at a rate of 8m/s² until it comes to a complete stop.

Decelerating is the process of slowing down or decreasing the speed of a vehicle, person, or object. It is the opposite of accelerating, which is the process of increasing speed. Deceleration can be caused by the force of friction from the road or other surfaces, or by reducing the amount of engine power or braking. Deceleration is necessary to safely slow down and stop a vehicle and to negotiate turns or curves in the road.

The acceleration of the roller coaster can be calculated using the equation
a = (Vf - Vi)/t, where Vf is the final velocity, Vi is the initial velocity, and t is the time taken for the change in velocity to occur.
In this case, Vf = 0m/hr, Vi = 80m/hr, and t = 10s.
Therefore, the acceleration of the roller coaster is -8m/s².
This means that the roller coaster is decelerating at a rate of 8m/s² until it comes to a complete stop.

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Answer:

Increase

Explanation:

The best way for me to visualize the relation between wavelength, frequency, and energy is to think about actual ocean waves. Wavelength is a measure of the distance between two equivalent points on consecutive waves (think wave peak to wave peak). Lets say you are building a sand castle and want to see how many waves hit your castle over a period of 10 seconds. If the distance between each wave is 10 ft and the wave is traveling at 1 foot per second then you will only have one wave hit your castle. If the wavelength is 1/2 that (5 ft) then you will have 2 waves hit your castle in the same amount of time. This is the same concept behind waves in physics. The smaller the distance between each wave, the more waves and therefore more energy that will be delivered.

The magnitude of the magnetic field is 0.082 T

A magnetic field is a vector field that represents the effect of magnetism on moving charges, currents, and magnetic bodies. A charge moving in a magnetic field experiences a force perpendicular to its velocity and magnetic field.

A magnetic field is created by a current flowing through a circular coil of wire. Every small part of the live wire contributes to the magnetic field lines. At the center of a circular wire, the field lines are straight and perpendicular to the plane of the coil.

Given:

Current in the wire (I) = 0.4 A

Radius of loop (r) = 0.07 m

Distance of the point of consideration (L) = 0.34 m

The magnetic field (B) at distance (L) due to a current (I) flowing in a wire of radius (r) is given as:

B = (N×r×I) / L

Where, N = Number of loops

So,

B = (1 × 0.07 ×  0.4)/0.34

B = 0.082 T

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Answer:

it's A

Explanation:

The integral of 1/(1 + x²) is (1/2)ln|1 + x²| + C where C is the constant of integration.

Integration is a mathematical process of finding the antiderivative of a function. To integrate the given expression 1/(1 + x²), we will use the substitution method.

Let u = 1 + x², du/dx = 2x dx, then dx = du/2x and the integral becomes:

∫1/(1 + x²) dx = ∫1/u * (1/2x) du= (1/2)∫1/u du

The antiderivative of 1/u is ln|u| + C, where C is the constant of integration.

Therefore, the final solution of the integral is (1/2)ln|1 + x²| + C.

Let us work through the steps:

Step 1:Let u = 1 + x² and then differentiate both sides with respect to x to obtain du/dx. du/dx = 2x

Substitute 2x dx = du into the integral ∫1/(1 + x²) dx to get the integral in terms of u:∫1/u * (1/2x) du = (1/2) ∫1/u du

Step 2:Calculate the antiderivative of 1/u, which is ln|u|. Thus, the final solution is (1/2)ln|1 + x²| + C, where C is the constant of integration. The constant C will vary depending on the initial conditions of the problem.

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Solar constant never change, and hence there is no change in shortwave as well as longwave radiation by the earth's atmosphere

Solar constant is the rate at which the solar energy from the sun intercepts the earth's surface. It's value is 1,338watts per square meter.

Long wave radiation is a type of radiation emitted from earth whose wavelength ranges from 4 to 30 micrometers. While shortwave radiation is the radiant energy which is produced by the sun whose wavelength ranges from infrared to ultraviolet through visible.

We know that solar constant never change (constant), and the amount of shortwave that reaches the earth's atmosphere is called solar constant. As the solar constant does not change, there will be no change in shortwave as well as longwave radiation by the earth's atmosphere.

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Answer:

The center of the retrograde motion occurs at the planet's opposition which is when it is exactly opposite the Sun.

Explanation:

Answer:

This question will be answered based on general photosynthetic understanding. The answer is:

The production of oxygen would increase

Explanation:

The characteristics of most plant forms is their ability to photosynthesize i.e. use solar energy (from sunlight) to make food (chemical energy). The product of this photosynthetic process is OXYGEN gas, which is released as a waste product via the stomata on their leaves. Note that, photosynthesis cannot occur without LIGHT as it provides the energy needed for the process.

Hence, in the duckweed plant like every other photosynthetic plant, the increase in the intensity and duration of exposure to light means the rate at which photosynthesis occurs will be increased. An increased photosynthetic rate means the synthesis of the products will also be increased i.e. glucose and OXYGEN.

Torque is produced by multiplying the length of a lever arm by the force acting perpendicular to the lever arm. There are two conceivable orientations for the scalar quantity torque: clockwise and anticlockwise.

A torque is created when a force is applied perpendicular to a lever arm. The lever arm or moment arm is the length that extends perpendicularly from the pivot point, or the centre of rotation, to the point at which the force is applied. A torque is always defined with reference to a pivot point.

A torque multiplier multiplies the torque applied to the bolt with each gearing level. For instance, a 5:1 torque multiplier will result in an output.For example, a torque multiplier with a 5:1 ratio will result in an output at the shaft that is five times the torque, but the speed will only be one fifth of the original since no energy can be created.

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The magnetic moment  is 3 electrons per atom.

Given, M = 2.00T, B = B_o + M_oM

where B_o = externally applied magnetic field , M = xnµp= magnetic dipoles per volume in the material, n = 8.50 × 10^28 atoms/m³.

The magnetic moment of each electron = 9.27 × 10^-24 A·m².

To calculate the number of electrons per atom that contribute to the field, we use the formula:

M = (n × x × µp)Bo + (n × x × µp × M)

The magnetic field is directly proportional to the number of electrons contributing to the field, we can express this relationship as:

n × x = Mo / (µp).

Using the above expression to calculate the value of n × x:n × x = M / (µp)  = 2 / (9.27 × 10^-24) = 2.16 × 10^23n = number of atoms/m³.

x = number of electrons/atom

x = (n × x) / n

= 2.16 × 10^23 / 8.5 × 10^28

= 0.2535.

The number of electrons per atom that contribute a magnetic moment of 9.27 × 10−²4 A·m² to the field is approximately 0.25,

Therefore the answer is  0.25 or (c) 3 electrons per atom.

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Answer:

Explanation:

The initial vertical velocity is 540sin55° = 442.342103... 442 m/s

The initial horizontal velocity is 540cos55° = 309.731275... 310 m/s

In the real world, both initial velocities would be reduced by air resistance and vertical velocity will be altered by gravity.