50 POINTS! A Boy throws a ball horizontally a distance of 22m downrange from the top of a tower that is 20.0m tall. What is his throwing velocity?

Answer:

[tex]4.1\cdot 10^8 N[/tex]

Explanation:

First of all, we need to find the pressure exerted on the sphere, which is given by:

[tex]p=p_0 + \rho g h[/tex]

where

[tex]p_0 =1.01\cdot 10^5 Pa[/tex] is the atmospheric pressure

[tex]\rho = 1000 kg/m^3[/tex] is the water density

[tex]g=9.8 m/s^2[/tex] is the gravitational acceleration

[tex]h=11,000 m[/tex] is the depth

Substituting,

[tex]p=1.01\cdot 10^5 Pa + (1000 kg/m^3)(9.8 m/s^2)(11,000 m)=1.08\cdot 10^8 Pa[/tex]

The radius of the sphere is r = d/2= 1.1 m/2= 0.55 m

So the total area of the sphere is

[tex]A=4 \pi r^2 = 4 \pi (0.55 m)^2=3.8 m^2[/tex]

And so, the inward force exerted on it is

[tex]F=pA=(1.08\cdot 10^8 Pa)(3.8 m^2)=4.1\cdot 10^8 N[/tex]

The total inward force is about 4.1 × 10⁸ N

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Let's recall Hydrostatic Pressure formula as follows:

[tex]\boxed{ P = \rho g h}[/tex]

where:

P = hydrosatic pressure ( Pa )

ρ = density of  fluid ( kg/m³ )

g = gravitational acceleration ( m/s² )

h = height of a column of liquid ( m )

Let us now tackle the problem!

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Given:

depth of the ocean's floor = h = 11 000 m

diameter pilot sphere = d = 1.1 m

atmospheric pressure = Po = 10⁵ Pa

Asked:

total inward force = F = ?

Solution:

[tex]F = P A[/tex]

[tex]F = ( P_o + \rho g h ) A[/tex]

[tex]F = ( P_o + \rho g h ) ( \pi d^2 )[/tex] → Area of Sphere = π d²

[tex]F = ( 10^5 + 1000 \times 9.8 \times 11000 ) ( \pi \times 1.1^2 )[/tex]

[tex]F \approx 4.1 \times 10^8 \texttt{ Newton}[/tex]

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The total inward force is about 4.1 × 10⁸ N

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Grade: High School

Subject: Physics

Chapter: Pressure

D. center seeking. Good Luck

Answer: The correct answer is "center-seeking".

Explanation:

Centripetal force is the force which is required to keep the body in the circular motion. The direction of the centripetal force is towards center of the circle.

The expression for the centripetal force is as follows;

[tex]F= \frac{mv^{2} }{r}[/tex]

Here, r is the radius, v is the velocity and m is the mass of the object.

Without this force, the body cannot move in the circular motion. Then, it follows the straight line motion.

The direction of the centripetal force acting on a ball on a string being spun in a circle around a person is center-seeking.

Therefore, the correct option is (D).

About 2 months depends on the person

Sound waves are longitudinal mechanical waves, that is, they depend on a medium to propagate.

Among the characteristics of a sound wave, it is the amplitude, that is the degree of movement of the molecules of the medium in which the wave propagates.  

Depending on how high this amplitude is, the sound will be louder.

Answer:

1. height

2. loudness

Answer:

In the figure attached we can see in a better way this situation. If we are told the rope is at 60 degress to the horizontal, we can place this rope in the origin of the X-Y coordinate system.

If we observe in detail, we have a right triangle where the opposite side [tex]OS[/tex] to the angle [tex]60\º[/tex] is the vertical component [tex]F_{y}[/tex] and the adjacent side [tex]AS[/tex] is the horizontal component [tex]F_{x}[/tex] . So, we can use trigonometric functions to find the force [tex]F[/tex] (the hypotenuse [tex]h[/tex]) applied to the rope.

For [tex]F_{x}[/tex]:

We can use the trigonometric function cosine, which is defined as:

[tex]cos(60\º)=\frac{AS}{h}[/tex]

This means [tex]F_{x}=Fcos(60\º)[/tex]

[tex]F_{x}=300Ncos(60\º)[/tex]

[tex]F_{x}=150N[/tex]

For [tex]F_{y}[/tex]:

We can use the trigonometric function sine, which is defined as:

[tex]sin(60\º)=\frac{OS}{h}[/tex]

This means [tex]F_{y}=Fsin(60\º)[/tex]

[tex]F_{y}=300Nsin(60\º)[/tex]

[tex]F_{y}=259.8N[/tex]

Finally the horizontal and vertical components are 150 N and 259.8 N

(1.6 x 10⁻¹⁹ C) x (300 N/C) = 4.8 x 10⁻¹⁷ Newton

The force experienced by the electron is 4.8×10⁻¹⁷ N.

Electric Field: An electric field is a region or space, where an electric force can be experienced or felt.

The formula of electric force is

F = E×Q............... Equation 1

Where F = Electric force, E = Electric field, Q = Charge.

From the question,

Given: Q = 1.6×10⁻¹⁹ C, E = 300 N/C

Substitute these values into equation 1

F = (1.6×10⁻¹⁹)(300)

F =  4.8×10⁻¹⁷ N.

Hence, The force experienced by the electron is 4.8×10⁻¹⁷ N.

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-is made mostly of hydrogen and helium.

-will eventually run out of fuel and die.

-creates energy through nuclear reactions

Answer:

The sun:

-is the largest star in our solar system

- is made mostly of hydrogen and helium  

-will eventually run out of fuel and die  

-creates energy through nuclear reactions

Explanation:    

The sun an average mass and sized star composed of hydrogen and helium gas. It generates energy in its core by nuclear fusion reaction. It is the only star in the solar system. Once all the fuel is run out, the nuclear fusion reaction would stop and the sun would die. There are billions of stars in our milky way galaxy and sun is not the largest of them.

the first one is the answer

Answer:

a

Explanation:

It would be 7.22 degrees Celsius.

Steps: (45°F − 32) × 5/9 = 7.222°C

Answer

66 m

Using the 2nd equation of linear motion, we can be able to solve the problem.

The equation states that;

S = ut + 1/2 at²

Where s ⇒ displacement,

            u ⇒ initial velocity,

            t ⇒ time and

            a ⇒ is acceleration

∴ S = ut + 1/2 at²

       = (5 × 6) + (1/2 × 2 × 6²)

       = 30 + 36

       = 66 m

TO bring joy and ease

It is the use of a (usually) mechanical means to create something physical that uses some scientific principle that will be used in war or for the betterment of man or both.

It is a machine that creates destruction or good or both that uses some sort of scientific basis of which it is an application.

Answer:

0.45 J/gC

Explanation:

The heat absorbed by the sample of iron is given by:

[tex]Q=mC_s (T_f-T_i)[/tex]

where:

Q = 1004 J is the heat absorbed

m = 111.6 g is the mass of the sample

Cs is the specific heat capacity of iron

T_f = 20 C is the final temperature of the sample

T_i = 0 C is the initial temperature

Solving the equation for Cs, we find

[tex]C_s = \frac{Q}{m(T_f-T_i)}=\frac{1004 J}{(111.6 g)(20 C-0 C)}=0.45 J/gC[/tex]

To calculate the number of turns in the secondary coil, use the transformer equation. The number of turns in the secondary coil is found by multiplying the ratio of the secondary voltage to the primary voltage by the number of turns in the primary coil.

To calculate the number of turns of wire needed in the secondary coil, we can use the transformer equation. The ratio of the secondary voltage to the primary voltage is equal to the ratio of the number of turns in the secondary coil to the number of turns in the primary coil. In this case, the primary voltage is 2,800 V and it needs to be reduced by 70 V. So, the secondary voltage is 2,800 V - 70 V = 2,730 V. The number of turns in the primary coil is 120. Using the transformer equation, we can find the number of turns in the secondary coil:

Number of turns in the secondary coil = (Secondary voltage / Primary voltage) * Number of turns in the primary coil

Number of turns in the secondary coil = (2,730 V / 2,800 V) * 120

Number of turns in the secondary coil = 117

Therefore, there should be 117 turns of wire in the secondary coil.

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Use a piece of cardboard

Put a lubricant between the surface of the object and the floor. use round objects, like pencils, to decrease the friction and push the refrigerator over the pencils

The number of cards in a deck without jokers is 52. If you draw just one card then the probability is going to have 52 in the denominator

the cards between 2 and 7 in the spade suit are 3 4 5 6. Since you have written "between", 4 cards will be successful.

The answer is P(3,4,5,6) = 4/52 which reduces to 1/13

Answer 1/13.

The odds against drawing a spade greater than 2 and less than 7 from a deck of cards are 25 to 1.

The odds against drawing a spade greater than 2 and less than 7 can be found by determining the probability of drawing a spade greater than 2 and less than 7, and then calculating the complement of that probability. Firstly, we need to determine the number of favorable outcomes, which is 2 (the 3 of spades and the 4 of spades). The number of possible outcomes is 52 (the total number of cards in the deck). Therefore, the probability of drawing a spade greater than 2 and less than 7 is 2/52, or 1/26. The complement of this probability, which represents the odds against drawing a spade greater than 2 and less than 7, is 1 - 1/26 = 25/26. So, the odds against drawing a spade greater than 2 and less than 7 are 25 to 1.

The answer should be 0.2 :D

From this particular list of choices, only A. increasing the mass of the object can increase the gravitational attraction between the object and the Earth.

Choices B and C have exactly the opposite effect, and choice-D has no effect at all.

This is all just a complicated, technical way of saying that if you eat a big steak plus a few shakes, your mass increases, and you WILL gain weight.

Answer:

A

Explanation:

got it right on study island

HBr has hydrogen ions (H+), not hydroxide ions (OH-).

Therefore, HBr is an acid, which decrease the pH level.

The answer is A.

the answer is D) your welcome :)))

Answer:

B. 50/-8

Explanation:

The expression -50/8 is equivalent to;

-50/8 = -6.25

The expression; 50/-8 is also equal to -6.25

Therefore;

The expression; -50/8 is equal to 50/-8

the answer your looking for is Optical instrument.

-- microscope

-- eyeglasses

-- telescope (refracting type)

Final answer:

Most earthquakes occur along plate boundaries where stress is released through sudden slippages. The longer the interval between earthquakes, the greater the stress and energy released when the surface finally moves.

Explanation:

Most earthquakes occur along plate boundaries where tectonic plates interact. The motion of these plates builds up stress in the crust, which is released in sudden and violent slippages that generate earthquakes. The longer the interval between earthquakes, the greater the stress and the more energy released when the surface finally moves. For example, in California, the San Andreas Fault slips every 25 years or so, while the average interval between major earthquakes in the Los Angeles region is about 150 years.

Has the most mass and density creating a gravitational field and pulling in the A and C with the lesser mass

Answer:  the answer is A

Explanation:

Answer:

A glass table able to withstand a normal force of 450 N when a 500 N object is placed on it

Explanation:

An object is said to be in equilibrium when the net force acting on it is zero.

Let's analyze each option:

- A glass table able to withstand a normal force of 450 N when a 500 N object is placed on it.  --> NON-EQUILIBRIUM. In fact, the downward force (the weight of the object, 500 N) is more than the maximum upward normal force (450 N), so the net force is non-zero.

- Two teams pulling a rope in opposite directions, both with a force of 3670 N  --> EQUILIBRIUM. Both forces are equal in magnitude and opposite in direction, so the net force is zero.

- An 80-N rope holding up a 920-N weight with a tension of 1000 N.  --> EQUILIBRIUM. The total force pulling on one side is 80 N + 920 N = 1000 N, which is equal to the force on the other side.

- A 500-newton sign hanging from two chains of insignificant weight, each with a tension of 250 N --> EQUILIBRIUM. The total force pushing on one side is 250 N*2 = 500 N, which is equal to the force on the other side.

a substance that is not solid

plz give me a brainliesttttt

According to the dictionary, the definition of liquid is, "a substance that flows freely but is of constant volume, having a consistency like that of water or oil."

Answer:

Pressure increases

Explanation:

Gay- Lussac's law gives the relationship between pressure and the temperature. There exists a direct relationship between temperature and pressure as per Gay- Lussac's law as :

At constant volume, [tex]pressure\propto temperature[/tex]

It is clear that pressure and temperature are directly proportional to each other. So, if temperature increases, pressure also increase. Hence, the correct option is (A) " Pressure increases ".

Answer: the pressure increases!

The speed of sound varies depending on the medium through which the sound waves travel. In addition, it varies with changes in the temperature of the medium. This is because an increase in temperature means that the frequency of interactions between the particles that transport the vibration increases, hence this increase in activity increases the speed. That is why the speed of sound in a gas is not constant, but depends on the temperature.

So, if we want the speed of sound in a gas to increase, the temperature of that gas must increase, as well.

For example, the higher the air temperature, the greater the velocity of propagation. Experiments have shown that the speed of sound in air increases [tex]0.6m/s[/tex] for every [tex]1\°C[/tex] increase in temperature.

Therefore:

Answer:

Faster

Explanation:

In a closed system, when two or more particles collide, the sum of momentum of two particles before and after collision will always be the same. In elastic collision, kinetic energy and momentum of a particle remains conserved. Whereas in inelastic collision, momentum remains same before and after collision but some of the particle's kinetic energy may be converted to other forms of energy.

A moving particle or object may possess kinetic energy and it depends mainly on its motion and mass. The kinetic energy is converted into potential energy and converted back to kinetic energy during collision of small particles.

It allows scientists to avoid the effects of light pollution.

Answer:

The advantage is to avoid the effects of light pollution.

Explanation:

There are several reasons why space observation is desirable in order to avoid problems that terrestrial observatories have. An example of this is that the space observatory does not suffer from the interference of city lights, avoiding light pollution. In addition, thermal turbulence (present in the atmosphere) also does not alter the telescope image.  The terrestrial atmosphere, having a spherical shape, acts as a lens that distorts images (a fact known as optical aberration), so the resolution of terrestrial images has a significant reduction. The atmosphere of our planet also absorbs an important portion of the electromagnetic spectrum (infrared and ultraviolet rays, for example), so some observations are virtually impossible to make.

A pulley makes work easier by redistributing the force required to lift an object, providing mechanical advantage and allowing the user to exert less force over a greater distance.

A pulley is a simple machine that consists of a grooved wheel and a rope or cable. It is used to change the direction or magnitude of a force, making it easier to lift or move heavy objects.

The primary concept behind how a pulley makes work easier is the principle of mechanical advantage. Mechanical advantage refers to the ability of a machine to multiply the input force applied to it, resulting in a greater output force. In the case of a pulley, it can provide a mechanical advantage by redistributing the force required to lift an object over a larger distance.

When a force is applied to one end of the rope wrapped around a pulley, the tension in the rope becomes equal throughout its length. This means that the force applied on one side of the pulley is transmitted to the other side with the same magnitude. As a result, the load being lifted is shared between the rope segments on each side of the pulley.

By using multiple pulleys, either in a fixed or movable configuration, a system of pulleys known as a block and tackle can be created. This arrangement allows for further mechanical advantage by increasing the number of rope segments supporting the load. Each additional pulley effectively divides the force required to lift the load, reducing the effort needed.

Therefore, a pulley system allows the user to exert less force over a greater distance, making it easier to lift heavy objects. The mechanical advantage provided by the pulley helps in minimizing the effort required to overcome the resistance or weight of the load, thus making work easier.

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This belongs in the bio section but the structure are the chromosomes that contain the DNA strands themselves containing the genetic information of any living things