A bead is swung in a horizontal circle so that the string makes 26° with the vertical as shown in the figure.
a) Find the centripetal acceleration of the bead.
b) If the period of the rotation of the bead is 1.6 s, what are the radius of the circle and the speed of the bead?

Answer:

connect two 9 ohms resistance in series now it becomes 18 ohm

Answer:

Electromagnetic waves strike a semiconductor, removing some of

its electrons, which form a current.

Answer:Electromagnetic waves strike a semiconductor, removing some of its electrons, which form a current.

Explanation:

Answer:

1 Atm (atmospheric pressure) is equal to 101325 pascal (Pa). To convert atm to pascal, multiply the atm value by 101325. atm to pascal formula. Pa = atm * 101325.

Explanation:

The horizontal distance traveled  by the snowball is 4.11 m.

your question is not complete, it seems to be missing the following information;

how far does the ball travel horizontally ?

The given parameters;

The time of flight of the snowball is calculated as;

\(h_y = v_0_yt + \frac{1}{2} gt^2\\\\14 = (4\times sin(44))t + 0.5\times 9.8t^2\\\\14 = 2.78t + 4.9t^2\\\\4.9t^2 +2.78t - 14 = 0\\\\solve \ the \ quadratic \ equation \ using \ formula \ method;\\\\a = 4.9, \ b = 2.78 ,\ c = -14\\\\t = \frac{-b \ \ +/- \ \ \sqrt{b^2 - 4ac} }{2a} \\\\t = \frac{-2.78 \ \ +/- \ \ \sqrt{(2.78)^2 - 4(4.9\times -14)} }{2\times 4.9}\\\\t = 1.43 \ s\)

The horizontal distance traveled  by the snowball is calculated as;

\(X = v_0_x \times t\\\\X = (4 \times cos(44) ) \times 1.43\\\\X = 4.11 \ m\)

Thus, the horizontal distance traveled  by the snowball is 4.11 m.

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Answer:

hi

Explanation:

A particle starts from rest and is acted on by a net force that does work at a rate that is proportional to the time t. The speed of the particle is proportional to √t.

Work is a change in kinetic energy, it should be noted. Power will therefore be determined as follows:

Power = Work / Time = force × velocity

Work = the change in kinetic energy = 1/2 mv2

If work is proportional to time:

W = t

1/2 mv2 = t

v2 = t

v (speed) = √t

Speed is the rate and direction of an object's movement, as well as the rate and duration at which an object is moving along a path. In all other positions, speed is a scalar value while pace is a vector.

Power is inversely related to t. Because the force is constant, the velocity will be a function of t. As a result, the particle's speed is proportional to √t.

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Answer:

See attached

Explanation:

Meniscus height is \(9.79 * 10^-3\) m which can be calculated by relation between surface tension, liquid density and acceleration due to gravity.

It is given that d = 1.5 mm

Meniscus height can be calculated as:

h = \((2T)/dPg\)

where T: Surface Tension

P: Liquid density

g = 9.8 \(m/s^{2}\)

T = \(72 * 10^-3 N/m\) that is applicable to water

P = \(10^3 kg/m^3\)

g = 9.8 \(m/s^2\)

d = \(1.5 * 10^-3 m\)

Plug these values in equation h = \((2T)/dPg\)

h = \((2*72*10^-3 N/m)/(1.5*10^-3m * 10^3 kg/m^3 * 9.8 m/s^2)\)

h = \(9.79 * 10^-3 m\)

Therefore, meniscus height is \(9.79 * 10^-3\) m

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Answer:

Florida is situated closer to the Tropic of Cancer, which receives more constant and direct rays of the sun.

Explanation:

Took the test got it right C

Answer:

approximately one gram

The mass of one cubic centimetre of water at 3.98 °C (the temperature at which it attains its maximum density) is closely equal to one gram. The basic unit of measurement for mass in the metric system; one cubic centimeter of water has a mass of approximately one gram.

Answer:one gram

Explanation:

Answer:

all distant galaxies are moving away from the Milky Way galaxy and the whole universe is expanding

Explanation:

Answer:

stomata to regulate water

specialized cells

Explanation:

Land plants are able to successfully adapt to staying on land through the use of stomata to regulate water loss and through the development of specialized cells that give support to grow erect.

Water regulation is important for the survival of plants on land, otherwise, they may face desiccation as a result of the heat from the sun. The stomata is a structure found on the leaves of land plants that open and close to regulate the amount of water lost to the environment through evapotranspiration. When there is adequate water and the plant can afford to lose some water, the stomata open, otherwise, the stomata close.

Support is also important for land plant's survival and the development of specialized cells in the form of sclerenchyma cells take care of this. The fibers and sclerids are two types of sclerenchyma cells that primarily function to support the land plants.

Answer:

c. natural resources

Explanation:

mercantilism is an economic practice by which governments use their economies

if am ryt

Answer:

C. natural resources

Explanation:

Mercantilism is based on the concept of a nation's power being directly related to its wealth. A nation's goal under mercantilism was to obtain as much gold and silver as possible and to export more goods than it imported from other nations. Gold and Silver are natural resources.

Various radial distances on a rotating disc have equal linear velocities and different angular velocities. So the correct option is C.

As a rotating disc spins, different points on its surface move at different speeds. This is because the linear velocity of a point on the disc depends on its radial distance from the center of the disc. Points closer to the center of the disc have a smaller radial distance and therefore a smaller linear velocity than points farther away from the center.

On the other hand, the angular velocity of all points on the rotating disc is the same. Angular velocity is a measure of how quickly an object rotates about an axis and is independent of the object's radial distance from the center.

This difference in linear velocity and angular velocity among points on a rotating disc can be observed in many real-life situations, such as the rotation of a vinyl record, a hard drive, or a turbine.

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Given data

*The half-life of iodine-131 is t = 8.07 days

*The amount of quantity left is N = 0.25 g

*The number of days is T = 40.35 days

The expression for the radioactivity decay is given as

Substitute the values in the above expression as

Answer:

See below

Explanation:

40.35 days / (8.07 day per half life) = 5 half lives

.25 = x ( 1/2)^5

.25 / ( 1/2)^5 = x = 8 gm originally

The diameter of Venus can be calculated using the angular size at inferior conjunction and its orbital parameters. With an angular size of 55" and a distance of 0.3 AU from Earth, the physical size of Venus can be determined.

The angular size of an object is the angle it subtends at the observer's location. In this case, the maximum angular size of Venus is given as 55" (arcseconds) during inferior conjunction. Inferior conjunction occurs when Venus is positioned between Earth and the Sun, and its distance from Earth is 0.3 AU (astronomical units). Venus is also stated to be 0.7 AU from the Sun.

To calculate the physical size of Venus, we can use the small-angle formula, which relates the angular size, distance, and physical size of an object. The formula is given by:

Angular size (in radians) = Physical size / Distance

Since the angular size is usually measured in arcseconds, it needs to be converted to radians. One radian is equal to 206,265 arcseconds.

Converting the given angular size of 55" to radians:

Angular size (in radians) = 55" / 206,265 ≈ 0.000266 radians

Using the small-angle formula, we can rearrange it to solve for the physical size:

Physical size = Distance × Angular size

Substituting the values, where the distance is 0.3 AU:

Physical size = 0.3 AU × 0.000266 radians ≈ 0.00008 AU

Finally, to convert the physical size from astronomical units to kilometers, we can use the conversion factor of 1 AU = 149.6 million kilometers:

Physical size = 0.00008 AU × 149.6 million kilometers/AU ≈ 12,000 kilometers

Therefore, the diameter (physical size) of Venus is estimated to be approximately 12,000 kilometers.

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Answer:

I think the answer 1

Explanation:

im probably wrong too i dont know

Answer:

If the Force Acts in the Direction Opposite to the Direction the Object Moves: In this situation, the force tends to slow the object down, thereby decreasing its kinetic energy. If the kinetic energy decreases, then the change in kinetic energy is negative.

Explanation:

The law of conservation of mass states that the mass in an isolated system can neither be created nor be destroyed but can be transformed from one form to another.

In the conversion of any form of energy, it obeys the law of conservation. That is to say that energy is not lost but can be converted from one form to another.

A form of energy can transform to another form when there is a change in its state.

For example, light energy in bulbs is being converted to heat energy with the bulb is lit.

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The magnitude of the second force acting on the 24 kg mass in the positive x direction is 611 N.

To solve this problem, we need to use Newton's Second Law of Motion, which states that the net force acting on an object is equal to the product of its mass and acceleration. We are given the mass of the object (24 kg) and its acceleration (28 m/s in the positive x direction), and we need to determine the magnitude of the second force acting on it.

Let F₁ be the magnitude of the force acting in the negative y direction and F₂ be the magnitude of the second force acting on the object in the positive x direction. The net force acting on the object can be represented as the vector sum of these two forces:

F = √(F₁² + F₂²)

We know that F = m * a, where m is the mass of the object and a is its acceleration.

Substituting the given values, we get:

F = 24 kg * 28 m/s = 672 N

Squaring both sides and substituting F, we get:

F₁² + F₂² = (672 N)²

Substituting the value of F₁ (260 N) and solving for F₂, we get:

F₂ = √((672 N)² - (260 N)²) = 611 N

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Answer:

P₄ + 3O₂ → 2P₂O₃

Explanation:

To balance an equation we take each element one by one on each side and balance their atoms.

Like P₄ (Tetraphosphorus) in the left side has 4 atoms of phosphorus.

While on the right side P₂O₃ (Diphosphorus Trioxide) has 2 Phosphorus atoms.

So place 2 as a coefficient in front of P₂O₃.

Now Phosphorus atoms (4 atoms) are balanced on each side.

Now number of Oxygen atoms in P₂O₃ = 2 × 3 = 6

On the left left side number of Oxygen atoms in O₂ = 2

To balance Oxygen atoms in each side, place 3 as a coefficient before O₂ on the left.

Therefore, balance equation will be,

P₄ + 3O₂ → 2P₂O₃

The magnitude of the angular momentum (L) of the bar is .\(\frac{1}{6}mbv\).

From the information given:

The rigid uniform bar has a mass = m

Length of the bar = b, and;

Linear speed of the bar endpoints = v

If we consider taking the angular momentum of the rotation, we have:

L = I × ω

where;

I = moment of the inertia

ω = angular velocity

The moment of the inertia for the given rigid uniform bar can be expressed as:

I = \(\frac{1}{2}\) X M X L²

where;

M = mass = m

L = bar's length = b

∴ I = \(\frac{1}{2}\) x m x b²

Also, the angular velocity ω can be expressed as:

ω = v/r

where;

radius r = half of the length = b/2

ω = \(\frac{v}{\frac{b}{2} }\) = 2v/b

Replacing the value of angular velocity and moment of inertia into the above equation for angular momentum; we have:

L = (\(\frac{1}{12}\) x m x b²) x (\(\frac{2v}{b}\))

L = \(\frac{1}{6}\) mbv

Therefore, we can conclude that the magnitude of the angular momentum of the bar (L) is 1/6 mbv

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Answer:

56.85 in

Explanation:

The gravitational force on the object with the mass of 6.50 × 10²kg is 15.09 × 10³ Newtons.

The gravitational force can be described as a force of attraction which attracts all the physical forms which are having some amount of mass. It is by far the weakest force recognized among all the natural force.

F = Gm₁m₂/ r²

where, F = Gravitational force,

G = Gravitational constant = 6.67 × 10⁻¹¹,

m₁ = 6 × 10²⁴kg,

m₂ = 6.50 × 10²kg

r = 4.15 × 10⁶m

F = 6.67 × 10⁻¹¹ × 6 × 10²⁴ × 6.50 × 10²/ (4.15 × 10⁶)²

F = 260 × 10¹⁵/ 17.22 × 10¹²

F = 15.09 × 10³

F = 15090 N

Therefore, the gravitational force on the object will be 15.09 × 10³ Newtons.

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Answer:

Kinetic energy.

Explanation:

The average power output during the lift is 2940w.

Given,

a person lifted the barbell from the ground.

The mass of the barbell = 100kg

time taken = 0.5s

displacement = s = 1.5m

we know,

w = mgs

= 100 × 0.5 × 1.5 = 1470j

As we know ,power = work done / unit time

P = 1470j/0.5s = 2940w

Hence,the average power output during the lift is 2940w.

Power is always a function of labour output, therefore if a person works at a variable rate depending on the time of day, his power will likewise vary. The idea of average-power enters the picture at this point. Let's study about power, average power, unit, and formula in this session.

Average power is calculated by dividing the total energy used by the total time required. The average quantity of work completed or energy converted per unit of time is known as average power.

The rate at which work is performed on an object is referred to as its power. Power is a temporal concept. It has to do with how quickly a task gets completed.

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The Metonic cycle is a period of almost exactly 19 years after which the lunar phases recur at the same time of the year.

The Metonic cycle is defined as ,235 synodic months is just 2 hours, 4 minutes and 58 seconds longer than 19 tropical years.

In Athens, at 5th century BC, give the cycle to be a whole number of days, 6,940. Using these whole numbers facilitates the construction of a lunisolar calendar.

A tropical year is longer than 12 lunar months and shorter than 13 of them. The arithmetic representation of  12×12 + 7×13 = 235 allows it to be seen that a combination of 12 "short" years (12 months) and 7 "long" years (13 months) will be almost  equal to 19 solar years.

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Answer:

EFFECTS Adverse reactions to hypnosis are rare, but may include: Headache. Drowsiness. Dizziness

Answer:

the normal human body temperature in Celcius is 37°C, in Fahrenheit is 98.6°F, in Kelvin is 310°K

The orbital quantum number, denoted as "l", specifies the shape of the electron's orbital. It can have integral values ranging from 0 to n-1, where n is the principal quantum number. In this case, l1 is given as 3.

To find the number of possible values of ml, which represents the magnetic quantum number, we need to consider the formula 2l + 1. Here, "l" represents the value of l1. Plugging in the given value, we get 2(3) + 1 = 7. Therefore, there are 7 possible values of ml for an electron with orbital quantum number l1 = 3.

It's important to note that ml can have values ranging from -l to +l, inclusive. In this case, since l1 = 3, the possible values of ml are -3, -2, -1, 0, 1, 2, and 3.

For an electron with orbital quantum number l1 = 3, there are 7 possible values of ml, namely -3, -2, -1, 0, 1, 2, and 3.

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