Which statement is NOT true about voltage?

A higher voltage means a faster current.
All electricity sources have the same voltage.
Voltage is the difference in electrical potential energy.
The unit for voltage is volt (v).

Answer:

C

Explanation:

because the concave mirror is always inverted

d )  when object is between focus and mirror , image formed is always virtual and erect

A concave mirror has a reflective surface that is curved inward and away from the light source .

a) Incorrect because image can be equal to , smaller then , and bigger then the object

b) and c)  Incorrect when object is between focus and mirror , image formed is virtual and erect

d ) Correct option  when object is between focus and mirror , image formed is always virtual and erect

e) Incorrect except one case in all other cases nature is real and inverted

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Answer:

84.1 m

Explanation:

Δx = stopping distance = Vot + 1/2at²

find a (acceleration first):

a = ΔV/t = (0 - 26.5 m/s)/4.85 s = 5.46 m/s²

Δx = (26.5 m/s)(0.75s) + (1/2)(5.46 m/s²)(4.85 s)²

Δx = 19.9 m + 64.2 m = 84.1 m

You will hit the car!  During the 0.75 s reaction time, you've already gone 19.9 m, then you need another 64.2 m to come to a complete stop.

When an object is floating in equilibrium on the surface of a liquid and then removed and placed in another container filled with a denser liquid, you would observe that the object would float submerged more deeply than in the first container. Therefore the correct answer is "the object would float submerged less deeply than in the first container".

Here's a step by step explanation using Archimedes' principle:

Step 1: Understand Archimedes' principle, which states that an object submerged in a fluid experiences an upward buoyant force equal to the weight of the fluid it displaces.

Step 2: In the first container, the object floats on the surface because the buoyant force equals the object's weight.

Step 3: When the object is placed in the denser liquid, the buoyant force acting on the object increases because the denser liquid exerts a greater upward force on the object.

Step 4: To balance this increased buoyant force, the object has to displace more of the denser liquid, causing it to submerge more deeply than in the first container.

So, based on Archimedes' principle, the object would float submerged more deeply than in the first container when placed in a denser liquid.

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Answer: Water has 10 times the specific heat capacity compared to iron. How much water would be needed to absorb the same amount of heat as a piece of iron?

Explanation:

The answer is: 1/10th the mass of iron.

So sorry about that other clown above me, that point farming clown needs to gtfo off the internet.

The power required to move the automobile to the top of the hill is 130,666.67 watts or 175.41 horsepower.

The power required to move an object can be calculated using the formula: power = work / time.

First, let's calculate the work done in lifting the automobile to the top of the hill. The work done against gravity is given by the formula: work = force × distance.

The force required to lift the automobile is equal to its weight. The weight of an object is given by the formula: weight = mass × acceleration due to gravity.

Substituting the given values, we have: weight = 2,000 kg × 9.8 m/s^2 (acceleration due to gravity) = 19,600 N.

The distance the automobile is lifted is 100 meters.

Therefore, the work done against gravity is: work = 19,600 N × 100 m = 1,960,000 J (joules).

The time taken to reach the top of the hill is given as 15.0 seconds.

Now, we can calculate the power using the formula: power = work / time.

power = 1,960,000 J / 15.0 s = 130,666.67 W (watts).

To convert watts to horsepower, divide the power in watts by 746 (1 horsepower = 746 watts).

power in horsepower = 130,666.67 W / 746 = 175.41 hp (horsepower).

Rounding to two decimal places, the power required to move the automobile to the top of the hill is approximately 130,666.67 watts or 175.41 horsepower.

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The  to problem of calculating the power required to move a 2,000-kilogram automobile to the top of a 100-meter hill in 15.0 seconds is given

Given, Mass of the automobile, m = 2000 knight of the hill, h = 100 time, t = 15.0 the gravitational potential energy of the automobile when at the bottom of the hill is equal to the work done in lifting it up the hill

.W = mgh= (2000 kg) (9.81 m/s²)

(100 m)= 1,962,000 J

Power is defined as the rate at which work is done, or the work per unit time. Therefore,

Power = Work / Time= 1,962,000 J / 15.0 s

= 130,800 WIn horsepower, Power = (130,800 W) / (746 W/hp)

= 175.3 hp

Therefore, the required power to move a 2,000-kilogram automobile to the top of a 100-meter hill in 15.0 seconds is 130,800 W or 175.3 hp.

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Answer:

a) Time = 2.67 s

b) Height = 35.0 m

Explanation:

a) The time of flight can be found using the following equation:

\( x_{f} = x_{0} + v_{0_{x}}t + \frac{1}{2}at^{2} \)   (1)

Where:

\( x_{f}\): is the final position in the horizontal direction = 80 m

\( x_{0}\): is the initial position in the horizontal direction = 0

\(v_{0_{x}}\): is the initial velocity in the horizontal direction = 30 m/s

a: is the acceleration in the horizontal direction = 0 (the stone is only accelerated by gravity)

t: is the time =?  

By entering the above values into equation (1) and solving for "t", we can find the time of flight of the stone:  

\( t = \frac{x_{f}}{v_{0}} = \frac{80 m}{30 m/s} = 2.67 s \)

b) The height of the hill is given by:

\( y_{f} = y_{0} + v_{0_{y}}t - \frac{1}{2}gt^{2} \)

Where:

\( y_{f}\): is the final position in the vertical direction = 0

\( y_{0}\): is the initial position in the vertical direction =?

\(v_{0_{y}}\): is the initial velocity in the vertical direction =0 (the stone is thrown horizontally)            

g: is the acceleration due to gravity = 9.81 m/s²

Hence, the height of the hill is:

\( y_{0} = \frac{1}{2}gt^{2} = \frac{1}{2}9.81 m/s^{2}*(2.67 s)^{2} = 35.0 m \)  

I hope it helps you!

Answer:

Explanation:

What is a free body diagram?

Answer: a force diagram is a graphical illustration used to visualize the applied forces and resulting reactions on a body in a given condition

Drawing a free-body diagram for this problem

Answer: Look at the attached picture, ask me any questions if you are still confused. It is a little messy since I didn't have my pen.

Find its weight on Earth

Answer: The weight is dependent on the mass of the object and the gravitational constant on the planet. The gravitational constant, in this case, is 9.8.

   so the weight = mass * gravitational constant = m * g = 1000 * 9.8

                          = 9800 N

Hope that helps!

The type of patent that may be granted to developers of new and non-obvious ornamental features of manufactured articles is called a design patent. The correct answer is: d.

A design patent protects the ornamental design of an article of manufacture. This means that the patent protects the way the article looks, not how it works. To be eligible for a design patent, the design must be new, original, and ornamental.

A functional or utility patent protects the way an article works. This means that the patent protects the article's function, not its appearance. To be eligible for a utility patent, the invention must be new, useful, and non-obvious.

An improvement patent is a type of utility patent that protects an improvement to an existing invention. To be eligible for an improvement patent, the improvement must be new, useful, and non-obvious.

A plant patent protects a new and distinct variety of plant. To be eligible for a plant patent, the variety must be new, distinct, uniform, and stable.

Design patents are a type of intellectual property (IP) protection that can be very valuable for businesses. Design patents can help businesses to protect their products from being copied by competitors, and they can also help businesses to increase the value of their products.

If you are considering filing for a design patent, it is important to speak with an experienced patent attorney. A patent attorney can help you to determine whether your design is eligible for a patent, and they can also help you to file the necessary paperwork with the United States Patent and Trademark Office (USPTO).

Therefore, the correct option is D, design patent.

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The overall electrical resistance that a circuit experiences as a result of all of its resistors acting in concert against its voltage source are known as the equivalent resistance of the circuit.

The total resistance, or equivalent resistance, is equal to the mathematical sum of the two resistances if there are two unequal resistors or impedances in a series.

Where the whole resistance is connected in parallel or series is known as the equivalent resistance. Electrical resistance indicates the amount of energy needed to transfer the charges, or current, across the circuit.

The total or equivalent resistance, RT, is equal to half the value of one resistor if the two parallel resistances or impedances are equal and of the same value.

The overall electrical resistance that a circuit experiences as a result of all of its resistors acting in concert against its voltage source are known as the equivalent resistance of the circuit.

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Answer:Because it makes the stains like go away which makes the fabrics get not stained so yeah

If the energy conversion efficiencies in a 3-step process are 30 or the first step, 40 or the second, and 20 or the third, the overall efficiency (step one to end) is close to 0.024, or 2.4%.

To calculate the overall efficiency of a 3-step process, you need to multiply the efficiencies of each step together. In this case, the efficiencies are given as percentages.
The overall efficiency can be calculated as follows:
Overall efficiency = (Efficiency of Step 1) x (Efficiency of Step 2) x (Efficiency of Step 3)

Given that the efficiency of Step 1 is 30%, the efficiency of Step 2 is 40%, and the efficiency of Step 3 is 20%, we can calculate the overall efficiency as:
Overall efficiency = (30/100) x (40/100) x (20/100) = 0.3 x 0.4 x 0.2 = 0.024
So, the overall efficiency of the 3-step process is close to 0.024, or 2.4%.

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Answer:

At position "B" the northern hemisphere is tilted the most from the earth-sun direction and will experience the shortest hours of daylight, (and also the most indirect sun rays).

A truck accelerating at 0.0083 meters/second2 covers a distance of 5.8 ×\(10^4\) meters. If the truck's mass is 7,000 kilograms, the work done to reach this distance is 3.3× \(10^6\) joules.

The correct answer is option E.

To calculate the work done by the truck to cover a distance of 5.8 × \(10^4\)meters, we need to use the equation for work:

Work = Force × Distance

In this case, the force can be calculated using Newton's second law:

Force = mass × acceleration

Where:

Acceleration (a) = \(0.0083 meters/second^2\)

Distance (d) = 5.8 ×\(10^4\) meters

Mass (m) = 7,000 kilograms

First, let's calculate the force exerted by the truck:

Force = mass × acceleration = (7,000 kg) ×\((0.0083 meters/second^2)\)= 57.1 Newtons

Next, we can calculate the work done:

Work = Force × Distance = (57.1 N) × (5.8 × 10^4 meters) = 3.3158 × \(10^6\)joules

Rounded to the nearest significant figure, the work done by the truck is approximately 3.3 × \(10^6\) joules.

Therefore, the correct answer is E.

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The question probable may be:

A truck accelerating at 0.0083 meters/second2 covers a distance of 5.8 ×\(10^4\)meters. If the truck's mass is 7,000 kilograms, what is the work done to reach this distance?

A. 1.7 × \(10^6\) joules

B. 3.4 ×\(10^6\) joules

C. 5.6 × \(10^6\)joules

D. 6.8 ×  \(10^6\)joules

E. 3,3  ×\(10^6\)  joules

Answer:1 cm=0.01

Explanation: Uu divide

Answer:

two attracting magnets are released while moving away from one another.  

Explanation:

Answer:the correct answer is: two attracting magnets are released from hole moving towards one another

Explanation:

The SI unit of force is newton N.

What is force?

The definition of force is being explained by the Newtons Second law of Motion. This law states that the force is equal to the change in momentum per change in time. When we have to calculate the force for a constant mass, it is equal to the product of mass and acceleration i.e., F= ma

There are total seven fundamental units in physics.

Force = mass x acceleration

Force = kilogram x meter/ second 2

So, the unit of force derived from fundamental units are kg m/s2 and newton N is the unit in international system of units.

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When a green light illuminates a purple costume on a theatrical stage, the color of the costume will appear as a darker shade of green. This is due to the subtractive color model, which states that colors are created when light is reflected off of an object and absorbed by the object.

In this case, the purple costume is reflecting green light and absorbing all other colors, resulting in a darker shade of green. This effect is even more dramatic when the light is brighter, resulting in a nearly black color.

The color of a costume is also affected by the lighting equipment used, such as the color and power of the light. This means that the costume’s color can be changed based on the lighting used on the stage.

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Explanation:

The acceleration on an object due to the gravity of any massive body is represented by g (small g). The force of attraction between any two unit masses separated by unit distance is called universal gravitational constant denoted by G(capital g). The relation between G and g is not proportional. That means they are independent entities.

G and g

In physics, G and g can be related mathematically as –

\(g=\frac{GM}{R^{2}}\)

Where,

1=g is the acceleration due to the gravity of any massive body measured in m/s2.

2=G is the universal gravitational constant measured in Nm2/kg2.

3=R is the radius of the massive body measured in km.

4=M is the mass of the massive body measured in Kg.

Answer

In the parallel circuit, you have to position the switch on only one of the loops.

Norepinephrine can be viewed as a Neurotransmitter or a chemical, contingent upon what discharges it and how far it should go to arrive at a receptor. It is true.

A neurotransmitter is the hormone norepinephrine, also known as noradrenaline. It is a chemical messenger that, as a neurotransmitter, aids in the transmission of nerve signals to another nerve cell, muscle cell, or gland cell across nerve endings.

A neurotransmitter is a molecule that a neuron secretes to influence another cell at a synapse. The cell that is receiving the signal—the target cell—could be a muscle or gland cell or another neuron.

Dopamine is the source of the neurotransmitter norepinephrine. Nerve cells in the brainstem and a region close to your spinal cord produce norepinephrine.

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The rock sitting on the cliff that is 25 m high has the gratest gravitational potential energy.

Potential energy is defined as the energy of an object by virtue of it's location. Mathematically, it is written as:

PE = mgh

Where

To determine the rock with the grater potential energy, we shall determine the potential energy of both rock assuming they have the same mass. Details below:

For rock sitting at 25 m high:

PE = mgh

PE = 10 × 9.8 × 25

PE = 2450 J

For rock sitting at 12 m high:

PE = mgh

PE = 10 × 9.8 × 12

PE = 1176 J

From the above calculation, we have:

Thus, we can conclude that the rock sitting at 25 m high, has the gratest potential energy.

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a. The acceleration of the system is 0.21 m/s^{2}

b. The equation of the force of friction is -

tension force - force of friction = unknown mass x its acceleration and force of friction is equal to product of coefficient of friction and                    normal force acting on unknown mass .

c.  Newton's second law of motion applies when there are unbalanced forces acting on an object. According to the second law, the mass and the net force acting on the object both affect how quickly an object is accelerating . An object's acceleration is directly proportional to the net force applied and inversely proportional to the object's mass. An object's acceleration increases as the amount of force exerted on it does. A decreasing acceleration is caused by an increase in an object's mass.

The unknown mass is nearly equal to 30 kg .

What is acceleration ?

the rate at which the speed and direction of a moving object vary over time is termed as acceleration . An object going straight ahead  when it accelerates or decelerates,  is said accelerated. Even if the speed is constant, motion on a circle accelerates because the direction is always shifting. Both effects contribute to the acceleration for all other motions.

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Answer:

2835

Explanation:

Simply observe, my foot.

Nah, if 3 is next to 8, and 2 is not by 3, that means it is either 382 or 283.

If 5 is not by 2, then it must be by the 3, since the 3 is on the other side and is the only location left.

You now have

5382 or 2835.

It is less than 5000, so it is the latter.

The work done to lift the crate is found to be 3000 Joules.

The weight of the create is 1000 Newton.

The height up to which the create has to be lifted is 3 m.

The work done by any force on an object is given by the relation,

W = F.s

Where,

W is the work done,

F is the force applied and,

s is the distance moved.

Here, the force applied is equal to the weight of the great which is 1000 Newton and the distance moved is 3m.

So, putting values,

W = 1000×3

W = 3000J

So, the work done in lifting the crate to a height of 3m is 3000 Joules.

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If a force has a constant magnitude, we can calculate the size of the impulse by dividing the force's strength by the length of time it is applied.

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Answer:

ok so first ur not a failure and its okay don't be so hard on ur self

Answer:

7 hours.

Explanation:

This is because you are traveling 5 kilometers per hour so 5 multiplied by 7= 35.

Answer:

There are two ways we may, one day, be able to time travel forwards.

You may have heard of Cryogenics. This is when someone who’s died is frozen instead of being buried or cremated. The theory is they can be “woken up” in the future when we have the technology to bring them back to life. Or a machine or device could be developed so that some people age more slowly than others around them. This way they’d live longer and see a future beyond the average person’s life span.  

Another very different way of travelling into the future is more like what you’d see in science fiction. This is might involve travelling in a rocket or spaceship at a very high speed, close to the speed of light. “We can’t establish equality with the speed of light but it is possible, in theory, to travel nearly as fast as the speed of light,” adds Dr Steane.  

So imagine you’re in a spaceship travelling very fast away from the Earth and you stay in orbit for a year. You would age at the same rate as if you were still on the Earth, by a year, but when you returned, the earth may have aged hundreds of years. “This is way beyond the technology we have at the moment,” he says. “But... in theory, it is possible.”

Explanation:

Hope this helped!

Answer:

It is and is not possible and if it is there are many factors to it at many dire consequences that come if we somehow interact with the people from the past