1. How is power defined? *

A. the quantity of work accomplished
B. the direction of the force applied to an object
C. the total distance an object is moved
D. the rate at which work is accomplished

Answer:

4.2 is the answer

Explanation

The image formed in a plane mirror is an equal distance behind the mirror as the object in front of it.

Step 1: the equation to this problem would be: 8.4/2

Step 2: 8.4 ÷ 2 = 4.2

Hope you could understand.

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Answer:

ya daddy is my zaddy

Explanation:

Answer:

a=-5.3m/s2

Explanation:

F=-20N

m=3.75kg

a=?

F=am /:m

a=F/m

a=-20N/3.75kg

a=-5.3m/s2

169 Kcalories are provided by a portion of food that has 25 grams of carbs, 6 grams of protein, and 5 grams of fat.

Kcalories mean kilo-calories. Basically, kilo-calorie or kcal refers to 1,000 calories. To get the Kcalories of food, you have to add the kcal of carbohydrates, protein, and fat.

Get the product by multiplying the number of grams of carbohydrate, protein, and fat by 4,4, and 9, respectively. So if you want to get the energy or Kcal available from a meal, you must then combine the outcomes.

Simply put it, take note of the following conversions:

So here's how to compute the Kcalories of food that contains 25g carbs, 6g protein, and 5g fat.

1.    25g x 4kcal/g = 100kcal

2.    6g x 4kcal/g = 24kcal

3.    5g x 9kcal/g = 45kcal

4.    100kcal + 24kcal + 45kcal = 169kcal!


Therefore, the food contains 169 kilo-calories!

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Answer:

Conductor

Explanation:

A battery holds all of the energy in itself. So without the battery, the circuit cannot work.

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The final speed of the ball when it accelerate uniformly at a rate of 3.52 m/s² for 23.3 m is 12.81 m/s.

Speed can be defined as the ratio of distance to time.

The S.I unit of speed is m/s.

To calculate the final speed of the ball, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the final speed of the ball is 12.81 m/s.

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Given, Power of the reading glasses (P) = 1.6 D. Hence, the focal length of the pair of reading glasses found on the rack in a pharmacy is 62.5 cm.

To find, Focal length (f)Formula used,

Power of the reading glasses (P) = 1/f

where, Power (P) is measured in diopters, Focal length (f) is measured in meters.

Solving the above equation for focal length (f), we get:

focal length (f) = 1/P

focal length (f) = 1/1.6 D

focal length (f) = 0.625 meters

focal length (f) = 62.5 cm

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When the speed is doubled and angular velocity is halved there is no change in the centripetal acceleration.

Rotational velocity, sometimes referred to as angular frequency vector, is a pseudovector that depicts how quickly an object's angular position or orientation varies over time.

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Answer:

For example, if the body rotates around a circle of radius r at 360o, then the angular displacement is found by the distance traveled around the circumference. This is found by 2πr, divided by radius θ = 2πr/r. In simplistic terms, it can be denoted as θ=2π, where 1 revolution is 2π radians.

Explanation:

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Answer:

An ideal "Carnot" engine

E = (Q2 - Q1) / Q2 or 1 - Q1 / Q2

Q1 (heat wasted) would have to be zero for 100% efficiency

Answer:

6.3 m/min

Explanation:

Circumference of a circle = 2πr

r = D/2 = 40m/2 = 20m

C = 2π(20m) = 125.7 m

speed = distance/time = (125.7 m) / (20  min)  = 6.3 m/min

Yes, if a galvanized hot water pipe is rusted on the outside, does that mean it is ready to spring a leak as Leaks will eventually occur if your pipes develop corrosion or rust on their exterior portion (often near the joints).

Applying a protective zinc coating to steel or iron to stop rusting is termed to as galvanization or galvanizing. The most used technique is hot-dip galvanizing, which generally involves immersing the components in a bath of hot, molten zinc. after galvanization the term used is refers as galvanized

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Answer:

4.44 cm

Explanation:

:)

1 inch = 2.54 cm

(1.75) x (1 inch) = (1.75) x (2.54 cm)

That's 4.45 cm .

The most prevalent kind of star in the cosmos and one with a lengthy lifespan are low-mass red giant stars, also referred to as "M-dwarfs."

These stars can blaze more steadily and slowly over billions of years because they are cooler and less powerful than our sun.

This lengthy lifespan is significant because it offers planetary systems a secure setting in which to grow and possibly support life. M-dwarfs are home to a large number of exoplanets, some of which are situated in the star's habitable zone, where liquid water might occur.

Because of this, low-mass red giant stars are essential to our comprehension of the genesis and possibility of life in the cosmos.

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If Boy A exerts a force of 3000 newtons on the box to the right and Boy B exerts a force of 5000 newtons in the opposite direction. then combined force (net force) on the box is 2000 N to the left.

Force is responsible for the motion of an object. it produces acceleration in the body. According to newton's second law force is mass times acceleration i.e. F =ma. Its SI unit is N which is equivalent to kg.m/s². There are two types of forces, balanced force and unbalanced force. When Net force is zero which is called as balanced force.

Given,

F₁ = 3000 N

F₂ = -5000 N

Net Force = F₁ + F₂

Net Force = 3000 N  - 5000 N = -2000N negative sign is for left.

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Answer: B

Explanation:

Magnetic fields are created due to charges in motion. Current by definition is the amount of charge flowing over time. Therefore, the answer is B, when an electric current flows through a wire.

Answer:

b. when an electric current flows through a wire

Explanation:

Hans Oersted discovered about two hundred years ago that when the electric current flowed through a wire a magnetic field was created.

(*) Sorry for my late answer but I hope this helps others that are looking for this.

I got 100%  ;)

Kepler's law of equal areas imply that gravity varies inversely with the square of the distance. (false)

Kepler's laws of planetary motion are rules in astronomy and classical physics that describe how the planets move within the solar system. They were mostly developed by the German astronomer Johannes Kepler.

Also whose analysis of the observations of the astronomer Tycho Brαhe from the 16th century allowed him to publish his first two law in 1609 and a third law nearly ten years later, in 1618. Kepler never assigned a number to these laws or made a special distinction between them and his other discoveries.

The conservation of orbital angular momentum L is a direct result of Kepler's law of equal areas.

That law is:

\(\dfrac{\mathrm{d}A}{\mathrm{d}t}=\dfrac{1}{2m}L\)

where, dA is the area which is swept out by the radius \(\vec{r}\) and is the object's mass m in a time dt.

Since L is conserved, the radius vector's sweep of area A over time t is unaffected by the distance from the central object (the sun).

The gravitational force, which is the primary force and is directed toward the object, causes L to remain constant.

None of these facts imply that gravity varies inversely with distance squared, so the given statement is false.

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The definition of a motion wave is the transfer of energy and momentum between two places in a medium without the physical movement of any substance.

The waves that occur on the surface of water are the ones that people are most familiar with, but waves can also be caused by disturbances in sound and light waves, and the motion of subatomic particles also has wavelike features. As a result, the study of waves is fundamental to the fields of physics and engineering. Vibrations in elastic media, like air, crystalline solids, or stretched strings, are the basic forms of wave motion.

In wave motion, the medium's particles vibrate with relation to their average positions. The medium's particles are not in constant motion from one location to another. When a wave moves across a medium, it does so uniformly in all directions. A wave's velocity is affected by the characteristics of the medium it traverses. When a medium is moving in a wave, energy is being transferred from one location to another. Nothing material can go through the medium. At the time of a wave's passage, the medium as a whole remains stationary. As opposed to the medium itself, only the disturbance moves.

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Answer:

1) t_total = 140 min ,  v = 126.7 m / min ,  2)  v = 0.628 m / s ,

3) v = 0.592 m / s ,  θ = -39.3 º

Explanation:

Here we have some short kinematics problems

1) d₁ = 4200 m at T1 = 25 min

    d₂ = 4.54 km at t2 = 1 h

    d₃ = 9000 m at t3 = 55 min

of the statement the direction of each route is the same

Let's reduce the distances to the SI system

     d₂ = 4.54 km (1000 m / 1 km) = 4540 m

     t₂ = 1 h (60 min / 1 h) = 60 min

Total time is

    t_total = t1 + t2 + t3

   t_total = 25 + 60 +55

   t_total = 140 min

the distance is

    d_total = 4200 + 4540 +9000

     d_total = 17740 m

with movement it is in one dimension and all displacement is in the same direction, distance equals displacement.

Speed ​​is

       v = 17740/140

       v = 126.7 m / min

in the direction of travel

Speed ​​is the modulus of speed

        | v | = 126.7 m / min

2) the angular velocity is

        w = θ / t

In this exercise

        t = 2 min (60 s / 1min) = 120 s

        θ = 30 rev (2π rad / 1 rev) = 60π rad

         w = 60π / 120

         w = 1.57 rad / s

linear velocity  is

        v = w r

        v = 1.57 0.40

        v = 0.628 m / s

velocity is the speed tangential to the  trajectory

3) the data for this exercise are

     distance = (number of steps) (distance of one step)

         d₁ = 500 0.40 m = 200 m West

         d₂ = 400 0.35 m = 140 m North

         d₃ = 300 0.30 m = 90 m East

in a total time of t = 2 min and 120 s

           t = 2  60 + 120 = 240 s

the distance traveled is

x axis we assume the direction towards + x (East) positive

           x_total = d₃ -d₁

           x_total = 90-200 = -110 m

y axis  

          y_total = d₂

          y_total = 140 m

we use the Pythagorean theorem to find the distance0

           D = √ (x_total² + y_total²)

           D = √ (110² + 90²)

           D = 142.13 m

The speed is

           v = D / t

            v = 142.13 / 240

           v = 0.592 m / s

speed is

           v = 0592 m / s

           tan θ = Y / X

           θ = tan -1 y / x

           θ = tan -1 (90 / (- 110))

           θ = -39.3 º

4) This angle is measured on the positive side of the x axis in a clockwise direction

          θ = 1.5 rev (2π rad / 1 rev) = 3π rad

           t = 90 s

the angular velocity is

           w = θ / t

           w = 3πi / 90

           w = 0.1047 rad / s

the speed is

            v = w R

            v = 0.14047 250

            v = 26.17 m / s

velocity is tangent to path

When the mass is replaced by a larger one and is pulled down the same distance from the equilibrium position, several aspects of the oscillating behavior will change.

These changes are primarily influenced by the mass and the spring constant.

Period: The period of the oscillation, which is the time taken for one complete cycle of oscillation, will increase. The period of an oscillating mass-spring system is inversely proportional to the square root of the effective mass (including the mass of the object and the mass of the spring system).

As the larger mass is replaced, the effective mass increases, resulting in a longer period.

Frequency: The frequency of the oscillation, which is the number of oscillations per unit time, will decrease. The frequency is the reciprocal of the period, so as the period increases, the frequency decreases.

Amplitude: The amplitude of the oscillation, which is the maximum displacement from the equilibrium position, will generally remain the same unless there are factors like damping or non-linearities.

As long as the spring obeys Hooke's Law and the displacement is small, the amplitude should not change significantly.

Maximum velocity: The maximum velocity reached by the mass during each oscillation will decrease. The maximum velocity is directly related to the amplitude and the period of oscillation.

Since the period increases while the amplitude remains the same, the maximum velocity will be reduced.

Overall, by replacing the mass with a larger one while maintaining the same displacement from the equilibrium position, the oscillating behavior will be characterized by a longer period, a lower frequency, a similar amplitude, and a reduced maximum velocity.

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Answer:

alright

Explanation:

that's so cool I'll join

The force that causes the protons in an atom to be attracted to one another is Strong nuclear.

Nuclear force is a force that acts between the protons and neutrons of atoms.

Neutrons and protons, both nucleons, are affected by the nuclear force almost identically and it is responsible for the attraction of protons in an atoms.

Thus, the force that causes the protons in an atom to be attracted to one another is Strong nuclear.

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\(\huge{ \mathrm{  \underline{ Answer }\:  \:  ✓ }}\)

Total force acting on right side = 800 N

Total force acting on left side :

Now, equivalent force acting on the plane is :

And the direction of equivalent force will be the direction of greater force, that is right direction.

Hence, Correct option is :

_____________________________

\(\mathrm{ \:TeeNForeveR\:}\)

Answer:

There is 18

Explanation:

The following information is provided in the problem: A sled with a weight of 19.7 kg is pulled with a force of 42.0 N at an angle of 43.0° across ground where μ₁ = 0.130. We need to find out the normal force that is exerted on the sled.

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Answer:

3 hours 71 minutes

Explanation:

As because Speed= distance/time taken

so time taken= 3.71

Explanation:

On a position vs time graph (x vs t), displacement is the difference in positions (Δx = x₂ − x₁).

On a velocity vs time graph (v vs t), displacement is the area under the graph (Δx = ∫ v dt).

Answer:

the direction is towards upward.i think.