Daniel wants to find out if he can notice the difference in light intensity when he adds some lit candles to a set of 50 lit candles. When he adds 5 candles to the set, he notices the difference in intensity half the time. However, when he adds less than 5 candles to his set, he does not notice any difference in the intensity of light. In this scenario, Daniel's difference threshold for detecting the change in light intensity is ________ lit candles.

Answer:

.

Explanation:

26 = Terminal Velocity

27 = Force

34 = Momentum

33 = Laws of Conversation of Momentum (I think)

Answer:

The centripetal acceleration will be "21.785 m/s²".

Explanation:

The given values are:

Time,

t = 0.85 seconds

Length of rope,

r = 0.40 m

Mass of ball,

m = 0.80 kg

As we know,

⇒ \(w=\frac{2 \pi}{t}\)

On substituting the values, we get

⇒      \(=\frac{2\times 3.14}{0.85}\)

⇒      \(= \frac{6.28}{0.85}\)

⇒      \(=7.38 \ rad/s^2\)

The centripetal acceleration will be:

⇒  \(a=r\times w^2\)

⇒     \(=0.40\times (7.38)^2\)

⇒     \(=0.40\times 54.46\)

⇒     \(=21.785 \ m/s^2\)

A cannonball weighing 50 kg is fired from a cannon mounted on the back of a ship.

When the cannonball is fired from the cannon, it experiences an initial force propelling it forward. According to Newton's third law of motion, the cannonball exerts an equal and opposite force on the cannon. The magnitude of the cannonball's initial velocity can be determined based on factors such as the cannon's design, the amount of gunpowder used, and the angle at which the cannon is elevated.

However, since the cannon is mounted on the back of a ship, the ship's velocity must also be considered. When the cannonball is fired, it inherits the ship's initial velocity, both in terms of speed and direction. This means that the cannonball will not only move forward due to the force from the cannon but also continue moving with the ship's velocity.

The combined effect of the cannon's force and the ship's velocity results in the cannonball following a curved trajectory known as a projectile motion. Factors such as air resistance, gravity, and the ship's movement can influence the cannonball's path and distance traveled. To make precise calculations, additional information regarding the ship's speed and direction, as well as the angle of the cannon's elevation, would be necessary.

To learn more about cannon.

Click here:brainly.com/question/28986884

#SPJ11

The electric field intensity between the plates is 10 N/C.

Distance between the plates, d = 5 x 10³m

Potential difference, V = 5 x 10⁴V

The electric field intensity between the plates,

E = V/d

E = 5 x 10⁴/5 x 10³

E = 10 N/C

Therefore, the force on the electron,

F = eE

F = 1.6 x 10⁻¹⁹x 10

F = 1.6 x 10⁻¹⁸N

To learn more about electric field, lick:

https://brainly.com/question/8971780

#SPJ1

Answer:

A) s=1/2at^2

t=√(2s/a)=√(2x400)/10.0)=9.0s

B) v=at

v=10.0x9=90m/s

Answer:

the density is mass over volume, so you divide 125g over 25 cm3, giving a result of 5 g/cm3

Answer:

The density is mass over volume

so you divide 125g over 25 cm3

giving a result of 5 g/cm3

you welcome have a good day!

Answer:

Explanation:

it can be a gas like carbon dioxide in soda

it can be liquid like alcohol in water

it can be solid like sugar and salt

Answer

✔ all three states

Explanation:

TOOK THE TEST

The speed in m/s equal to 78.0 mi/h AND  the area in ft2 of a rectangle with sides 18.6 m and 3.82 m AND the height in cm of a person who is 5 ft 7 in tall.

a) To find the speed in m/s equal to 78.0 mi/h, we use the conversion factor,

1 mi = 1609.344 meters and 1 h = 3600 s.78.0 mi/h = (78.0 mi/h) x (1609.344 m/mi) x (1 h/3600 s)= 35.0 m/s

Therefore, the speed in m/s equal to 78.0 mi/h is 35.0 m/s.

b) The area in ft2 of a rectangle with sides 18.6 m and 3.82 m is calculated as follows:

First, we convert the sides from meters to feet using the conversion factor

1 m = 3.281 ft.18.6 m = 18.6 m x (3.281 ft/m) = 61.024 ft3.82 m = 3.82 m x (3.281 ft/m) = 12.532 ft

The area is given by the formula A = L x W, where L is the length and W is the width.

A = (61.024 ft) x (12.532 ft)A = 765.69 ft2Therefore, the area in ft2 of a rectangle with sides 18.6 m and 3.82 m is 765.69 ft2.

c) The height in cm of a person who is 5 ft 7 in tall can be found by converting the height to inches and then to centimetres.

1 ft = 12 in5 ft = 5 ft x 12 in/ft = 60 in5 ft 7 in

= 60 in + 7 in = 67 in1 in = 2.54 cm67 in

= 67 in x (2.54 cm/in) = 170.18 cm

Therefore, the height in cm of a person who is 5 ft 7 in tall is 170.18 cm.

To know more about speed visit:

https://brainly.com/question/13943409

#SPJ11

Answer:

True

Explanation:

The main differences between a physical property and a chemical property are mentioned below:

A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points.

While A chemical property describes the ability of a substance to undergo a specific chemical change.

Answer:

  85.2 N

Explanation:

You want to know your weight if the Earth were 3 times as massive and had 5 times the present radius. Your weight is 710 N.

Your weight is proportional to the mass of the Earth and the square of the radius between your mass and the center of the Earth. The revised dimensions of the earth would multiply your weight by ...

  W = k(M/r²) = 710 N

  W' = k((3M)/(5r)²) = k(M/r²)(3/25) = (710 N)(3/25) = 82.5 N

Your weight would be 82.5 N.

Answer:

negative particles

Explanation:

An atom can be defined as the smallest unit comprising of matter that forms all chemical elements. Thus, atoms are basically the building blocks of matters and as such defines the structure of a chemical element.

Generally, these atoms are typically made up of three distinct particles and these are protons, neutrons and electrons.

In Chemistry, electrons can be defined as subatomic particles that are negatively charged and as such has a magnitude of -1.

Valence electrons can be defined as the number of electrons present in the outermost shell of an atom. Valence electrons are used to determine whether an atom or group of elements found in a periodic table can bond with others. Thus, this property is typically used to determine the chemical properties of elements.

Hence, an object is most likely to become electrically charged by gaining or losing negative particles.

Answer: The building is approximately 54.74 meters tall

Explanation:

Assuming the coin is in free fall and neglecting air resistance, we can use the kinematic equation:

v = gt

where v is the final velocity, g is the acceleration due to gravity (9.8 m/s²), and t is the time elapsed. Plugging in the values:

v = (9.8 m/s²) x (2.85 s)

v = 27.93 m/s

Therefore, the velocity of the coin after 2.85 seconds is 27.93 m/s.

Again, assuming free fall and neglecting air resistance, we can use the kinematic equation:

d = 1/2 gt²

where d is the distance fallen (i.e. the height of the building), g is the acceleration due to gravity (9.8 m/s²), and t is the time elapsed. Plugging in the values:

d = 1/2 x (9.8 m/s²) x (3.34 s)²

d = 54.74 m

Therefore, the building is approximately 54.74 meters tall. However, if air resistance is not negligible, the actual height may differ.

Answer:

Acceleration = 0.2m/s²

Explanation:

Given the following data;

Mass = 1000kg

Force = 200N

To find acceleration;

Force is given by the multiplication of mass and acceleration.

Mathematically, Force is;

\( F = ma\)

Where;

F represents force.

m represents the mass of an object.

a represents acceleration.

Making acceleration (a) the subject, we have;

\(Acceleration (a) = \frac{F}{m}\)

Substituting into the equation;

\(Acceleration (a) = \frac{200}{1000}\)

Acceleration = 0.2m/s²

Answer:

180.45m

Explanation:

Given that

mass m= 0.65kg

let H be height of building

angle of projection =40°

initial velocity  v up = 10.5 sin 40 = 6.75 m/s

horizontal velocity u= 10.5 cos 40 = 8.04 m/s

horizontal distance x = 19.6

x=ut

x= u t =

x= 8.04 t

t=19.6/8.04  = 2.44 seconds

applying the formula

h = H + Vt -1/2gt^2

0 = H + 6.75 * 2.44 - 4.9 * 2.44^2

solving for H we have

0=H + 6.75 * 2.44 - 4.9 * 5.9536

0=H + 6.75 * 2.44 - 29.17264

0=H + 6.75 *-26.73264

0=H -180.44532

H=180.45m

Thus, the difference in refractive indices for the two rays in the crystal is 0.1.

A beam of linearly polarized light is converted into circularly polarized light by passing it through a crystal with a thickness of 0.003 cm.

To calculate the difference in refractive indices (Δn) for the two rays, use the formula:
Δn = λ / (2 * d)

Where λ is the wavelength (600 nm or 0.0006 cm) and d is the thickness of the crystal (0.003 cm).
Δn = 0.0006 / (2 * 0.003) = 0.1

The difference in refractive indices for the two rays in the crystal is 0.1. In the arrangement, the optical axis (OA) of the crystal is perpendicular to the plane of incidence.

This phenomenon occurs because the crystal is birefringent, meaning it has different refractive indices for different polarization states of light. When the linearly polarized light enters the crystal, it is split into two orthogonal components with different refractive indices, causing a phase difference between them.

When this phase difference reaches 90° (which happens at the minimum thickness), the light becomes circularly polarized.

Know more about the linearly polarized light

https://brainly.com/question/15025594

#SPJ11

Answer:

The magnetic field through the wire must be changing

Explanation:

According to Faraday's law, the induced emf, ε in a metallic conductor is directly proportional to the rate of change of magnetic flux,Φ  through it. This is stated mathematically as ε = dΦ/dt.

Now for the wire, the magnetic flux through it is given by Φ = ABcosθ where A = cross-sectional area of wire, B = magnetic field and θ = angle between A and B.

So, dΦ/dt = dABcosθ/dt

Since A and B are constant,

dΦ/dt = ABdcosθ/dt = -(dθ/dt)ABsinθ

Since dθ/dt implies a change in the angle between A and B, since A is constant, it implies that B must be rotating.

So, for an electric current (or voltage) to be produced in the wire, the magnetic field must be rotating or changing.

Answer:

The answer is Mass

Explanation:

I took the tests and study kinda yeahhhhhh

AHHHHHHHHHHHHHHHHHh chicks butts

The gravitational force of a star on planet 2 orbiting it is half that of planet 1.

Newton's gravitational law formula for gravitational force between two objects

\(F = G \frac{M \: m}{r^2}\)

Given

Compare the gravitational force on two condition.

\(\frac{f1}{f2} = \frac{G \frac{M \: m_1}{r_1^2}}{G \frac{M \: m_2}{r_2^2}}\)

\(\frac{f1}{f2} = \frac{\frac{m_1}{r_1^2}}{\frac{m_2}{r_2^2}}\)

\(\frac{f1}{f2} = \frac{m_1 \: r_2^2}{m_2 \: r_1^2}\)

\(\frac{f1}{f2} = \frac{m_1 \: (2r_1)^2}{2m_1 \: r_1^2}\)

\(\frac{f1}{f2} = \frac{4r_1^2}{2r_1^2}\)

\(\frac{f1}{f2} = \frac{2}{1}\)

The ratio of gravitational force f1 : f2 = 2 : 1

2f2 = f1

\(f2 = \frac{f1}{2}\)

\(f2 = \frac{1}{2} f1\)

Learn more about gravitational force here: https://brainly.com/question/24783651

#SPJ4

The initial velocity of the suitcase is 7. 63 m/s The initial velocity of the suitcase can be calculated using the following formula:

u = v0 + at

where u is the final velocity, v0 is the initial velocity, a is the acceleration due to gravity (which is 9.81 m/s^2), and t is the time.

We are given that the suitcase slides 3. 00 m down the ramp, so its displacement on the ramp is 3. 00 m. We are also given that the suitcase then slides an additional 5. 00 m along the floor before coming to a stop. Therefore, the total displacement of the suitcase is 8. 00 m.

Using the formula for displacement, we can calculate the time it takes for the suitcase to slide 8. 00 m:

t = 8. 00 m / 9.81 m/\(s^2\)

t = 0. 81 s

Now we can plug in the values we have found into the formula for the initial velocity:

u = v0 + at

u = 0 + 0. 81 s * 9.81 m/\(s^2\)

u = 7. 63 m/s

Therefore, the initial velocity of the suitcase is 7. 63 m/s.  

Learn more about initial velocity

https://brainly.com/question/28395671

#SPJ4

Answer:

I hope to learn the basic moves and stances of boxing. I understand that I won't be boxing with another person, but that’s OK. These exercises seem like a good starting point. I really want to understand how to put together combinations. I’ve seen professional boxers throw combinations on TV, but their hands move so quickly that I can’t catch the finer details of the sport. Maybe this will be an opportunity for me to find out more.

Explanation:

If one rolls a bowling ball down the alley at 5 m/s, then it has a kinetic energy of 62.5 joules when rolled down the alley at 5 m/s, which is calculated by using the formula kinetic energy (KE) = (1/2) × mass × \(velocity^2\)

kinetic energy of an object is given by the formula,

Kinetic Energy (KE) = (1/2) × mass × \(velocity^2\)

 Here, given the mass of the bowling ball is 5 kilograms,

KE = (1/2) × mass × \(velocity^2\)

KE = (1/2) × 5 kg × \((5 m/s)^2\)

KE = 62.5 J

Hence,  it has a kinetic energy of 62.5 joules when rolled down the alley at 5 m/s.

Learn more about the  calculation of kinetic energy here.

https://brainly.com/question/17408787

#SPJ1

The question is incomplete, complete question is below

you roll a bowling ball down with mass 5Kg the alley at 5 m/s. How much kinetic energy does it have?

Answer:

True

Explanation:

Because with more force the car will move faster than it did before!!!

Answer:

When a load acting on a structure is evenly distributed, the load is said to be an "even" load. This type of load is also referred to as a "uniform" load. It is a type of load where the force or weight is spread evenly over an area or surface, rather than being concentrated at a single point.

Examples of even loads include the weight of a uniform slab or the pressure exerted by water on the walls of a tank. Even loads are important to consider in structural design, as they can affect the strength and stability of a structure.

Explanation:

Given mass of the object is 1200kg and it's placed at a height of 45m above the ground. As we know that potential energy is ,

\(\longrightarrow PE = mgh \)

where,

Substituting the respective values ,

\(\longrightarrow P.E. = 1200kg * 10m/s^2* 45m\)

Multiply ,

\(\longrightarrow P.E. = 540000J \)

Hence the potential energy is 540000J .

I hope this helps.

Initial launch speed of the cars are in order as  Vcar 1 = Vcar 2< Vcar 3

Speed (often abbreviated as "s") is a scalar variable that describes how much an object's location changes over time or how much it changes per unit of time. The average speed of an item in a period of time is the distance traveled by the object divided by the duration of the period.

Time divided by distance are the speed-related metrics.. The meter per second (m/s) is the SI unit of speed, while the kilometer per hour (kph) is the most often used unit of speed in daily life.

To know more about  speed visit : brainly.com/question/93357

#SPJ9

In a hot air balloon, if the flame is turned down, the temperature of the air inside the balloon will decrease.

This will cause the volume of the air inside the balloon to decrease as well, since the air molecules will have less kinetic energy and therefore move less vigorously. However, the pressure inside the balloon will not necessarily decrease, since it is also dependent on the number of air molecules present.

As the temperature and volume of the air decrease, the density of the air inside the balloon will increase.

To know more about temperature visit :-

https://brainly.com/question/26866637

#SPJ11

Answer:Protons

Explanation:

The potential energy (Ep) is 490 J and the velocity is 9.9  m/s.

To calculate the potential energy (Ep) of an object with mass M at a height h above a reference point, you can use the formula:

Ep = M * g * h

where,

g =the acceleration due to gravity (approximately 9.8 m/s² on the surface of the Earth).

M = mass

h = height

For this case:

Ep = 10 kg * 9.8 m/s² * 5 m

Ep = 490 J

To calculate the velocity (v) of an object in free fall, you can use the formula:

v = \(\sqrt{2gh}\)

So in this case:

v = \(\sqrt{2 * 9.8 m/s^{2} * 5 m }\)

v = 9.899 m/s

v ≈ 9.9 m/s

Note: These formulas assume that the object is in free fall and that there is no air resistance or other forces acting on the object.

Learn more about Potential Energy on

https://brainly.com/question/30004572

#SPJ1