You calculate -16 Joules as the work done by a force on an object. This means Group of answer choices the work vector points in the negative direction the force vector pointed in the negative direction. the object moved in the negative direction. the object's displacement and the force did not point in the same direction.

Answer:

a person climbs a set of stairs

Explanation:

A person climbing a set of stairs increases his height, which also increases his gravitopotential energy. Gravitopotential energy increases with height as you move further away from the surface of the Earth.

A wind up toy winding down is already expending its stored up potential energy. An apple falling from a tree is already losing its gravitipotential energy. A firecracker that explodes is already using up the potential energy stored in its chemical. All these are cases where the potential energy is decreasing.

The first part of the graph shows that the acceleration is minimal as the velocity does not increase much in the upwards journey. It is stationary at the maximum height and is greatly accelerated by gravity until it falls to the ground. Option B

The velocity-time graph under gravity for an object that is dropped from a certain height and experiences free fall acceleration due to gravity would be a straight line with a constant slope.

The slope of the graph represents the acceleration, which is constant at approximately 9.8 meters per second squared (m/s²) near the surface of the Earth. The velocity of the object would increase uniformly with time, and the graph would show a linear increase in the vertical direction, with time on the horizontal axis and velocity on the vertical axis.

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1 meter = 39.37 inches

Then the meter stick is 39.37 inches long.

two blocks are fastened to the ceiling of an elevator. The elevator accelerates upward at 2.00 m/s^2.  The tension in each rope is equal to the sum of the weight of each block.

When the elevator accelerates upward, it exerts a force on the blocks equal to their combined weight plus the tension in the ropes. Since the blocks are fastened to the ceiling, they remain stationary relative to the elevator. Therefore, the net force on each block must be zero.

Let's consider two blocks with masses m1 and m2, fastened to the ceiling of the elevator. The tension in each rope can be determined by analyzing the forces acting on each block.

For the first block (m1), the forces acting on it are its weight (m1 * g) and the tension in the rope (T1). The net force on the block is given by the equation:

T1 - m1 * g = m1 * a

where g is the acceleration due to gravity and a is the acceleration of the elevator.

For the second block (m2), the forces acting on it are its weight (m2 * g) and the tension in the rope (T2). The net force on the block is given by the equation:

T2 - m2 * g = m2 * a

Since the blocks are connected to the same elevator, they experience the same acceleration (a). Therefore, we can set the two equations equal to each other:

T1 - m1 * g = T2 - m2 * g

Simplifying the equation, we find:

T1 - T2 = (m1 - m2) * g

Since the tension in each rope is equal, we can rewrite the equation as:

T = (m1 - m2) * g / 2

The tension in each rope is equal to the difference in the masses of the blocks multiplied by the acceleration due to gravity, divided by 2.

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The tension in each rope is 19.6 N.

To find the tension in each rope, we need to consider the forces acting on each block. Let's assume the masses of the blocks are m1 and m2, and the tension in each rope is T1 and T2, respectively.

For the first block (m1):

The net force acting on it is given by:

F_net = T1 - m1 * g,

where g is the acceleration due to gravity (approximately 9.8 m/s^2).

Since the elevator is accelerating upward, the net force on the first block is:

F_net = m1 * a,

where a is the acceleration of the elevator (2.00 m/s^2).

Setting these two equations equal to each other, we have:

T1 - m1 * g = m1 * a.

Similarly, for the second block (m2):

The net force acting on it is given by:

F_net = T2 - m2 * g.

Since the elevator is accelerating upward, the net force on the second block is:

F_net = m2 * a.

Setting these two equations equal to each other, we have:

T2 - m2 * g = m2 * a.

Now we have two equations with two unknowns (T1 and T2). We can solve them simultaneously.

From the first equation, we can isolate T1:

T1 = m1 * a + m1 * g.

From the second equation, we can isolate T2:

T2 = m2 * a + m2 * g.

Plugging in the values:

m1 = mass of the first block,

m2 = mass of the second block,

g = 9.8 m/s^2,

a = 2.00 m/s^2.

Assuming both blocks have the same mass (m1 = m2), we can simplify the equations to:

T1 = T2 = m * (a + g),

where m is the mass of each block.

The tension in each rope is 19.6 N when the elevator accelerates upward at 2.00 m/s^2, assuming both blocks have the same mass.

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Answer:

If you ring the doorbell and no one opens the door, you'll infer that no one is home rather than continuing to ring the doorbell to an empty house. Being able to understand this and look for another solution is another example of mental flexibility.

Explanation:

Answer:

Explanation:

The formula you use is

W = F * d

F = 35.0 N

d = 1.5 m

W = 35 N * 1.5 m

W = 52.5 J (oules)

The period of small angle oscillations for a simple pendulum with a 0.6 kg mass at the end of a 4-meter string is approximately 4.02 seconds.

The period of small angle oscillations of a simple pendulum can be found using the formula:

T = 2π√(L/g)

Where T is the period, L is the length of the string, and g is the acceleration due to gravity (approximately 9.81 m/s²).

In this case, the mass of the pendulum (0.6 kg) does not affect the period, as the formula only depends on the length of the string and the acceleration due to gravity. Given the length of the string (L) is 4 meters, we can calculate the period as follows:

T = 2π√(4/9.81)

T ≈ 2π√(0.408)

T ≈ 2π(0.639)

T ≈ 4.02 seconds

So, the period of small angle oscillations for a simple pendulum with a 0.6 kg mass at the end of a 4-meter string is approximately 4.02 seconds. This result is valid when the oscillations are small, as the formula assumes that the angle of displacement is close to zero, leading to more accurate results in such cases.

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Answer:

It turns out that an object's kinetic energy increases as the square of its speed

Explanation:

A car moving 40 mph has four times as much kinetic energy as one moving 20 mph, while at 60 mph a car carries nine times as much kinetic energy as at 20 mph.

basiclly the faster the more impact it has when it suddenly stops or hit somthing

When calculating the binding energy, z multiplied by the sum of mass of proton and mass of electron.

Z in binding energy calaculation is the number of protons in the nuclides.

To calculate the binding energy we use the formula below;

E = Z (mp + me) + Nmn − mn

Where;

Thus, when calculating the binding energy, z multiplied by the sum of mass of proton and mass of electron.

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It is Chemical Energy, actually

Answer:

A (cytosine)

Explanation:

ACGT

Explanation:

Friction is a force that offers resistance to movement when one object is in contact with another

Answer:

Friction is a force.

Explanation:

Have a wonderful day.

The net work required to change the motion of the 43g particle is approximately 5.332 J.

To calculate the net work required to change the motion of a 43g particle moving to the left at 29 m/s to move to the right at 33 m/s, we need to follow these steps:

1. Convert the mass of the particle from grams to kilograms:

43 g = 0.043 kg

2. Calculate the initial kinetic energy (KE_initial) of the particle using the formula

KE_initial = 0.5 * m * v_initial², where m is the mass and v_initial is the initial velocity (-29 m/s, negative because it's moving to the left).

3. Calculate the final kinetic energy (KE_final) of the particle using the formula

KE_final = 0.5 * m * v_final², where v_final is the final velocity (33 m/s, positive because it's moving to the right).

4. Calculate the net work (W_net) required using the formula W_net = KE_final - KE_initial.

Following these steps:

1. Mass = 0.043 kg
2. KE_initial = 0.5 * 0.043 kg * (-29 m/s)² = 18.0815 J
3. KE_final = 0.5 * 0.043 kg * (33 m/s)² = 23.4135 J
4. W_net = 23.4135 J - 18.0815 J = 5.332 J

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Answer:

=> Black colour do not reflect the wavelength of light and is a good emitter of heat . This, black is a good absorber of radiation.

Answer:

Black coloured objects absorb all the wavelengths of light and do not reflect any of them. Therefore, it looks black in colour and is considered to be a good absorber and a good emitter of heat. On the other hand, white coloured objects reflect all the light that falls into it and therefore they look white

Answer:

The motion of the book would change if there was less friction if it moved across the table is that it would spin and have more kenetic energy.

Explanation:

friction slows stuff down so if it had less friction it would speed up and spin when sliding.

Answer: The Water

Explanation:

The boiling litre of water has more volume and so has more heated molecules per cubic metre so it will have a higher amount of heat than the glowing nail.

To practically test this, put the glowing nail into a litre of cold water and record the final temperature when the nail has cooled down. Repeat this with the boiling litre of water. You will notice a higher final temperature with the boiling water indicating that it had more heat.

Answer:

a)

Weight in Air = 0.3N

Weight in Water = 0.25N

Weight in Liquid = 0.24N.

Upthrust /Buoyant Force = Weight in Air – Weight in Fluid(Water in this case)

= 0.3 – 0.25

= 0.5N.

b) R.D of Body = Density of Body/Density of Standard Fluid(Water).

There's a Derived Formula for RD.

I'm gonna Apply it here.

Ask me for the derivation in the Comment section if you need it.

RD = α/ρ = (Weight in Air) / (Upthrust Force)

Where

α = density of the Body(or reference substance)

ρ = density of standard fluid (water)

= 0.3/0.05 = 6.

c) RD of Liquid = (Density of Liquid) /(Density of standard Fluid(water)

Or we just go by that formula

RD of Liquid = Weight in Air/Upthrust(In Liquid)

We'll be using the Upthrust in that Liquid now.

= 0.3 – 0.24 = 0.06

RD = 0.3/0.06 = 5.

(a) The average acceleration of the raindrop is 0.467 m/s².

(b) The average air resistance force on the raindrop is 1.4 x 10⁻³ N.

The average acceleration of the raindrop is calculated as follows;

Mathematically, the formula for average acceleration is given as;

a = Δv/Δt = v/t

where;

a = (7 m/s) / (15 s)

a = 0.467 m/s²

The average air resistance force on the raindrop is calculated as follows;

F = ma

where;

F = 0.003 x 0.467

F = 1.4 x 10⁻³ N

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Answer:

B. B and D

Explanation:

the steepness the acceleration whether it's up or down. hope this helps:)

Answer:

The upper limit of metamorphism occurs at the pressure and temperature of wet partial melting of the rock in question. Once melting begins, the process changes to an igneous process rather than a metamorphic process. During metamorphism the protolith undergoes changes in texture of the rock and the mineral make up of the rock.

Explanation:

i hope this helps

When melting of a metamorphic rock occurs, it changes into Magma and igneous rock will emerge as a result of this..

Sedimentary, igneous, and metamorphic rocks are the three distinct types of rocks that make up the rock cycle. Rocks such as sedimentary and igneous rocks were not always rocks.

A very particular set of circumstances must exist for a rock to undergo metamorphism. It is necessary to subject the preexisting rock to extreme temperatures, high pressures, or hot, mineral-rich fluids. All three of these conditions are typically true. The Earth's crust is where these conditions are most frequently encountered, either there or at plate borders when tectonic plates meet.

It is essential that the current rock not melt in order to produce metamorphic rock. The rock will melt under excessive heat or pressure and turn into magma. Instead of a metamorphic rock, an igneous rock will emerge as a result of this.

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Answer:

a. The total momentum of the trolleys which are at rest before the separation is zero

b. The total momentum of the trolleys after separation is zero

c. The momentum of the 2 kg trolley after separation is 12 kg·m/s

d. The momentum of the 3 kg trolley is -12 kg·m/s

e. The velocity of the 3 kg trolley = -4 m/s

Explanation:

a. The total momentum of the trolleys which are at rest before the separation is zero

b. By the principle of the conservation of linear momentum, the total momentum of the trolleys after separation = The total momentum of the trolleys before separation = 0

c. The momentum of the 2 kg trolley after separation = Mass × Velocity = 2 kg × 6 m/s = 12 kg·m/s

d. Given that the total momentum of the trolleys after separation is zero, the momentum of the 3 kg trolley is equal and opposite to the momentum of the 2 kg trolley = -12 kg·m/s

e. The momentum of the 3 kg trolley = Mass of the 3 kg Trolley × Velocity of the 3 kg trolley

∴ The momentum of the 3 kg trolley = 3 kg × Velocity of the 3 kg trolley = -12 kg·m/s

The velocity of the 3 kg trolley = -12 kg·m/s/(3 kg) = -4 m/s

a-The total momentum of the trolleys before separation=0

b.The total momentum of the trolleys after  separation=0

c. The momentum of 2kg trolley after  separation=12kg-m/sec

d. The momentum of 3kg trolley after separation=-12kg-m/sec

e. The velocity of the 3kg trolley=4kg-m/sec

Given-

Trolley A with mass= 2kg

Trolly B with mass= 3kg

Velocity of trolly A =6m/sec

A- Total momentum of the trolleys before separation-

Here, in this problem both the trolleys are in the rest position hence the momentum of both trolleys = 0

B- Total momentum of the trolleys after  separation-

We know that motion never changes in an isolated collection of objects,

hence the momentum of the trolleys before and after the separation=0

C- Momentum of the Trolley A (2kg)-

It is known that momentum= Mass x Velocity

\(P=m\times v\)

\(P=2\times 6\)

\(P=12\)

Hence, the momentum of the 2kg trolley is 12 kg-m/sec

D- Momentum of the Trolley B (3kg)-

As we know that  motion never changes in an isolated collection of an object hence the total moment of after saparation = 0

hance the momentum of the trolley B will be equal and opposite to the momentum of trolley A=

\(P= -12\)

Momentum of trolley B (3kg) is -12kg-m/sec

E- The velocity of the 3kg trolley-

The momentum of trolley A= Momentum of trolley B

\(m_{b} v_{a} =m_{b} v_{a}\)

\(-2\times 6=3\times v_{a}\)

\(v_{a}=-4\)

The value of the velocity of the 3kg trolley is -4m/sec

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Answer:

not sure

Explanation:

jahhhhhsjjjjdddddhdhdj hbdbd#dialectical DHL I have no clue W Bush administration and I don't have any jshshhhhdgggddddddd the entire community was literate because

a. they had been slaves and had not been to school

b. they were too poor to go to school

c. work was more important to them than education

d. they avoided to going school

the entire community was literate because

a. they had been slaves and had not been to school

b. they were too poor to go to school

c. work was more important to them than education

d. they avoided to going school

the entire community was literate because

a. they had been slaves and had not been to school

b. they were too poor to go to school

c. work was more important to them than education

d. they avoided to going school

the entire community was literate because

a. they had been slaves and had not been to school

b. they were too poor to go to school

c. work was more important to them than education

d. they avoided to going school

jsbsbd the entire community was literate because

a. they had been slaves and had not been to school

b. they were too poor to go to school

c. work was more important to them than education

d. they avoided to going school

the entire community was literate because

a. they had been slaves and had not been to school

b. they were too poor to go to school

c. work was more important to them than education

d. they avoided to going school

the entire community was literate because

a. they had been slaves and had not been to school

b. they were too poor to go to school

c. work was more important to them than education

d. they avoided to going school

the entire community was literate because

a. they had been slaves and had not been to school

b. they were too poor to go to school

c. work was more important to them than education

d. they avoided to going school

BFF and I don't have any questions please call her and her husband to the hospital for a bit more time with my family grew up in the form of a ring whose inner circumference is it a lot of people who are you doing today beautiful and I don't have any questions please call her and her husband to the

Answer:

A

Explanation:

A letter represents the location of the resistor in this diagram

Resistor can be defined as a passive electrical component with two terminals and are used for either limiting or regulating the flow of electric current in electrical field.

The main aim  of resistor is to reduce the current flow and to lower the voltage in any particular portion of the circuit.

The SI unit of resistor is Ohm, each one has one connection and two terminals. wire wound resister is used in the balanced current control,  accurate measurement are required like in shunt with ampere meter.

Photoresistors use in flame detectors, burglar alarms, in photographic devices, etc, it is also used for controlling temperature and voltmeter;  also used in modulators, demodulators, and transmitters.

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Explanation:

15)

the average speed is

20m / 40s = 20/40 m/s = 0.5 m/s

16)

the front and the back of the bus.

Answer:

The Louisiana Purchase eventually doubled the size of the United States, greatly strengthened the country materially and strategically, provided a powerful impetus to westward expansion, and confirmed the doctrine of implied powers of the federal Constitution.

Answer:

C.

Explanation:

""""""" Twice,Half """"""

A big wheel with twice the circumference of a small wheel will rotate with the force and the speed of the small wheel.

C) twice, half

A big wheel with twice the circumference of a small wheel will rotate with twice the force and half the speed of the small wheel.

It is the round circle found on the outside angle of the machine.

It is the adjusted barrel or rod-like portion put on the interior of the machine that's connected to the wheel and makes a difference to advance development.

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Momentum is conserved in both elastic and inelastic collisions.

A collision is an event in which two or more objects interact with each other and experience a change in motion as a result of their interaction. Collisions can range from minor interactions between particles to massive collisions between astronomical objects, such as planets or stars. When two objects collide, their total momentum before the collision is equal to their total momentum after the collision, as long as no external forces are acting on the system. This principle is known as the law of conservation of momentum.

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Answer:

\(\huge\boxed{\sf h = 19.6\ m}\)

Explanation:

Given:

Time = t = 2.00 secs

Acceleration due to gravity = g = 9.8 m/s²

Initial Velocity = \(\sf V_{i}\) = 0 m/s

Required:

Height = h = ?

Formula:

\(\sf h = V_{i} t + \frac{1}{2} gt^2\)

Solution:

Putting the given in the above formula

h = (0)(2) + 1/2 (9.8)(2)²

h = 1/2 (9.8)(4)

h = (9.8)(2)

h = 19.6 m

Hope this helped!