A mover hoists a 50 kg box from the ground to a height of 2 m. What was the change in the box's energy

Answer:

B

Explanation:

D is nonsense. The current keeps coming through all lights.

A is wrong. The exact opposite happens. More bulbs more resistance.

C is wrong. More resistance less current, not more.

So your answer is B because the voltage drop in each decreases when there are more bulbs.

The answer is B! Hope this helped

Answer: Increase Reaction Rates

Explanation: Increasing the temperature increases reaction rates because of the disproportionately large increase in the number of high energy collisions. It is only these collisions (possessing at least the activation energy for the reaction) which result in a reaction

Answer:

leads to an increase in the rate of reaction

Explanation:

An increase in the temperature of a reaction often leads to an increase in the reaction rate because, when the temperature is increased, the rate of collisions between the reactant particles increases (which in turn increases the number of effective collisions) causing more products to be formed.

Rate of reaction is the amount of product formed per unit time of a reaction.

NOTE: According to collision theory, reactant particles must collide before a chemical reaction can occur/proceed. However, not all collisions leads to a reaction, the collisions that leads to reaction occurring is referred to as effective collision.

The total effective resistance of several resistors in SERIES is just the sum of all the individual resistances.

So the effective resistance of ten 120-ohm resistors in series is

(120 + 120 + 120 + 120 + 120 + 120 + 120 + 120 + 120 + 120) .

A much easier way to write it is . . . (10) x (120) .

Total effective resistance = 1,200 ohms .

The total resistance when ten resistors of the resistance of 120 Ω connected in series is equal to 1200 Ω.

In a series combination of resistors, the resistors are connected end-to-end. Consider two resistors, R₁ and R₂ are connected in a series combination. If two resistors are connected in series, then their effective resistance will be given by:

Total Resistance, R =  R₁ + R₂

In a series connection of resistors, the current will flow through one resistor and then through another resistor. The same current flows through every resistor in one direction. The total voltage of the circuit is equal to the sum of all the voltage drops across the resistors.

Given the resistance of each resistor = 120 Ω

The number of resistors = 10

Total resistance, R = R₁ + R₂ + R₃ + R₄ +R₅+ R₆ +R₇+R ₈ +R₉+ R₁₀

R = 10 ×120

R = 1200 Ω  

Therefore, the total resistance of 10 given resistors is 1200 Ω.

Learn more about resistors in series, here:

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Answer:

Graph

Explanation:

I already answered this question

Answer: graph

Explanation:

Answer:

7.0 s, 69 m/s

Explanation:

If we take down to be positive, then the time to reach the ground is:

x = x₀ + v₀ t + ½ at²

240 m = (0 m) + (0 m/s) t + ½ (9.8 m/s²) t²

t = 7.0 seconds

The final velocity is:

v² = v₀² + 2a(x - x₀)

v² = (0 m/s)² + 2(9.8 m/s²) (240 m - 0 m)

v = 69 m/s

I believe the answer is true

In a chemical reaction, molar mass of reactants and products are equal. So the given statement is FALSE.  

Explanation:

To form a new product, there occurs a reaction between the compounds and the elements then there will be no loss or gain in the mass.

This is the being stated in “Law of conversation of mass”. During a process of chemical change reactants, the total mass will be equal to product's total mass.  

Answer:

B

Explanation:

P = I² R

If P is 2 watts and R is 30 ohms:

2 = I² (30)

I = √(1/15)

I ≈ 0.26 A

Answer:

B. 0.26 amps is your answer

Answer: Open system

According to thermodynamics, if a system exchanges matter and energy with its environment it is an open system. For example, human beings and animals can be considered as open systems, since we take chemical energy in the form of food and perform work on our surrounding environment when moving and doing activities.

-

It give s you acceleration as slope of v-t graph gives acceleration

The slope of speed time linear graph is acceleration of an object.

Explanation:

By formula, the product of mass and acceleration of a body gives us the force of acting on it. In other terms, acceleration of a body can be defined as the ratio of change in velocity and change in time.

In a graph with speed or velocity on X axis and time on Y axis, the slope of the curve gives us acceleration as output.

Answer:

Buffers

Explanation:

A buffer solution is a solution containing weak acids and their salts or weak bases and their salts.

A buffer solution is an equilibrium system that resists changes in pH or pOH when a small amount of an acid or base is added hence it is a solution of fairly constant pH value.

Answer:

Graph B.

Explanation:

it is a wave, they are fun to watch

Answer:

1750 Joules.

Explanation:

Work done = force * distance

= 7 * 250

= 1750 Joules.

D the ability to do work

Explanation:

Energy, in physics, the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other various forms.

Answer: -2 km

Explanation:

If we imagine Jin's movement to be the hypothenuse of a right triangle, then the southern component of Jin's movement corresponds to the side of the triangle opposite to the angle of 30 degrees. Therefore, the magnitude of this southern component is given by

However, the angle of 30 degrees is south of east: this means that the direction of this southern component is south, and since we generally take north as positive direction, we must add a negative sign, so the correct answer is

-2 km

Answer:

B

Explanation:

Edge 2021

Answer:

6 V

Explanation:

In a circuit, the relationship between voltage, current and resistance is given by Ohm's law:

[tex]V=RI[/tex]

where

V is the voltage

R is the resistance

I is the current

In this circuit, we have

[tex]R=12.0\Omega[/tex] is the resistance

I = 0.500 A

so we can find the voltage of the battery by using Ohm's law:

[tex]V=(12.0 \Omega)(0.500 A)=6 V[/tex]

Final answer:

A truck with greater mass has more inertia and needs more force to achieve the same acceleration as a lighter truck. A heavier truck does not have less inertia, nor can it be 100 percent efficient in terms of energy use.

Explanation:

Based on Newton's laws of motion, particularly the second law which states that force equals mass times acceleration (F = ma), it is clear that an object with more mass will have more inertia. Inertia is the resistance of any physical object to any change in its velocity. A truck with more mass than another will inherently have more inertia, not less, because inertia is directly proportional to mass.

Because of this direct proportionality, a truck with more mass will also need more force to move or accelerate at the same rate as a lighter truck. This is also why heavier objects accelerate slower than lighter ones when the same force is applied. Regarding efficiency, no machine or vehicle, including trucks, can be 100 percent efficient due to the second law of thermodynamics, which says that some energy is always lost in the form of heat or other non-usable forms during energy transfers.

The components that are found outside the nucleus is electrons

Answer: Electrons

Explanation:

Electrons are the negatively charged particles found outside an atom. Protons are positively charged (you can remember P for positive!) and neutrons have no charge or a neutral charge. Remember N for no charge or Neutral.

Answer:

C. Saturated

Explanation:

When the solution is supplied with excess sugar the excess crystals descend to the bottom of the solution creating an area of very high concentration thus the bottom becomes saturated since no more solute can be added to dissolve.

Answer:

C

Explanation:

cause im smart

Answer: C

Explanation:

Not only am I smart but I want to help people.

Answer: A

Explanation: It isn't the exact answers but its is the closest. The exact answer is 3474.6.

Final answer:

To convert the Moon's diameter from miles to kilometers, multiply 2,159 miles by the conversion factor of 1.60934 to get approximately 3,474.76 kilometers, rounding to 3,454.4 kilometers, which is option A.

Explanation:

To convert the diameter of the Moon from miles to kilometers, we use the conversion factor that 1 mile is approximately equal to 1.60934 kilometers. Therefore, if the Moon's diameter is 2,159 miles, we multiply this number by the conversion factor to find the equivalent distance in kilometers.

2,159 miles * 1.60934 km/mile = 3,474.76146 kilometers

The correct answer from the given options would be A: 3,454.4km, which is the approximate value when rounded to one decimal place.

Answer:

True

Explanation:

It is possible to reduce/lessen the force that is acting on an object. For example, if you were pushing on a box and wanted to push less on the box, that would be possible.

Rearrange the equation so that the unknown variable is by itself on one side of the equals sign (=) and all the other variables are on the other side. RULE #1: you can add, subtract, multiply and divide by anything, as long as you do the same thing to both sides of the equals sign.

Answer:

the remote

Explanation:

Answer:

the couch you are sitting on

Explanation:

Ball thrown into the air at an angle.

Answer: Protons give the nucleus a positive charge.

Explanation:

Protons - Gives of positive charge

Neutrons - Gives of neutral charge (No charge)

Electrons - Gives off negitive charge

The proton present in the nucleus gives the positive charge to the nucleus.

Explanation:

In the nucleus, there are two particles present, one is proton and the other one is neutron. Neutron is neutral in charge or say, it has no charge. Proton has the positive charge.

Therefore, among both the particle, proton gives the positive charge in the nucleus over the neutral charge of neutron. Thereby, nucleus acquires the positive charge from the proton. This positive charge is balanced by the negative charge of the electron, making atom on whole, neutral.

Efficiency or [tex]\eta[/tex] is calculated by formula: [tex]\eta=\frac{W_{output}}{W_{input}}[/tex] where [tex]\eta\leq1[/tex] also efficiency has no unit.

Now put in the data and calculate the efficiency.

[tex]\eta=\frac{8}{10}=\boxed{0.8}[/tex]

The efficiency of the machine is 0.8

If you want to get percentage just multiply by 100 and you get 80%

Hope this helps.

r3t40

Answer:

I believe it is C. Their Temps.

Explanation:

Hope my answer has helped you!

To understand how energy moves between two objects, you need to know their temperatures, states, and heats.

In order to determine how energy will move between two objects, you need to know their temperatures, states, and heats. Temperature is a measure of the average kinetic energy of the particles in an object, while the state refers to whether the object is a solid, liquid, or gas. Heat is the transfer of energy between objects due to a difference in temperature, and it flows from a higher temperature object to a lower temperature object.

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Answer:The magnetic force is a consequence of the electromagnetic force, one of the four ... fields we learned how moving charge surrounds itself with a magnetic field.

Explanation:

Magnetic fields are generated by moving electrical charges, creating a magnetic force on other moving electric charges or magnets. The magnitude of this force is determined by the charge, speed, and magnetic field's magnitude and also depends on the angle between the velocity and magnetic field vectors. Notably, there is no magnetic force on static charges.

The relationship between charges, magnetic fields, and force can be understood through electromagnetic theory in physics. When electrical charges are in motion, they create magnetic fields. This phenomenon is observed as a magnetic force exerted on other moving charged objects or another magnet. The force that a moving electric charge experiences in a magnetic field is perpendicular to the direction of its velocity and the magnetic field.

The magnitude of this magnetic force is given by the product of the charge, the speed of its motion, and the magnitude of the magnetic field. It also depends on the angle between the velocity and magnetic field vectors. The direction of the force is governed by the right-hand rule, which states it will be perpendicular to both the direction of the moving charged particle and the direction of the applied magnetic field.

It's crucial to note that there is no magnetic force on static charges. Only when charges move, they produce magnetic fields that exert forces on other magnets. Hence, relative motion introduces a connection between electric and magnetic fields, where each can affect the other.

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Answer:

When the speed of the bottle is 2 m/s, the average maximum height of the beanbag is 0.10  m.

When the speed of the bottle is 3 m/s, the average maximum height of the beanbag is 0.43  m.

When the speed of the bottle is 4 m/s, the average maximum height of the beanbag is  0.87 m.

When the speed of the bottle is 5 m/s, the average maximum height of the beanbag is  1.25 m.

When the speed of the bottle is 6 m/s, the average maximum height of the beanbag is  1.86 m.

Sorry for not answering early on! If anyone in the future needs help, I got these answers from 2020 egenuity, though I can't post the picture for proof. Stay Safe!

Correct Answers:

- The waves have a trough

- the waves have a crest

- the energy that is transferred move in a perpendicular direction

- particles move in an up and down motion

Answer:

A, c, d, e

Explanation: