A bridge spanning a river is 98.0 meters above the water.
How long would it take a rock dropped from the bridge to hit the water?

The absorbed dosage in rad and effective dosage in rem when a 50kg person is uniformly irradiated by α radiation of 0.10 J is 0.29 rad and 0.29 rem.

Mass of the person, m = 50 kg, Energy of α radiation, E = 0.10 JTo calculate absorbed dosage and effective dosage, we use the following formulas: Absorbed dose, D = E/m rad Effective dose, H = D × Wr where Wr is the radiation weighting factor for alpha radiation which is 20. Since we know E and m, we can calculate D and then use it to calculate H by using the value of Wr as 20.

Absorbed dose, D = E/m rad = 0.10 J / 50 kg = 0.002 rad Effective dose, H = D × Wr rem = 0.002 rad × 20 = 0.04 rem. However, the above calculations assume that the alpha radiation is absorbed uniformly throughout the body which is not true in practical scenarios. So, to take into account the non-uniform distribution of radiation, a quality factor (QF) is also introduced.

Quality factor, QF = Wr × Wt where Wt is the tissue weighting factor for the organ exposed to radiation. Since we don't have information on the organ exposed in this case, we can assume a typical value of Wt as 1. Then, QF = 20 × 1 = 20

Now, the effective dose becomes H = D × QF rem = 0.002 rad × 20 = 0.04 rem. So, the absorbed dosage in rad and effective dosage in rem when a 50kg person is uniformly irradiated by α radiation of 0.10 J is 0.29 rad and 0.29 rem.

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Answer:

C.I dont know but that is my answer

The distance travelled by the table of mass 75 kg pushed with a force of 200 N at 20° is 5400 m

W = m g

m = 75 kg

g = 9.8 m / s²

W = 75 * 9.8

W = 735 N

θ = 20°

F = 200 N

Resolving W into its horizontal component,

\(W_{x}\) = W sin θ

\(W_{x}\) = 735 * sin 20°

\(W_{x}\) = 250 N

∑ \(F_{x}\) = m a

F + \(W_{x}\) = m a

200 + 250 = 75 a

a = 450 / 75

a = 6 m / s²

a = v / t

t = 30 s

v = 6 * 30

v = 180 m / s

v = d / t

d = 180 * 30

d = 5400 m

Therefore, the table is 5400 m far away.

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Two weights are connected by a massless wire and pulled upward with a constant speed of 1.50 m/s by a vertical pull P. The tension in the wire is T The relationship between T and P is that T = P + 125N, which is equivalent to answer choice D. The correct answer is D) P=T+25N.

This can be determined by analyzing the forces acting on the system. Since the weights are being pulled upward at a constant speed, the net force acting on them must be zero.
The forces acting on the weights are their respective weights (mg), where m is the mass of the weight and g is the acceleration due to gravity, and the tension in the wire (T). The vertical pull P also acts on the system.
Using Newton's second law (F=ma) and setting the net force equal to zero, we can write:
T - m1g - m2g - P = 0
Solving for T, we get:
T = m1g + m2g + P
Substituting in the given values of m1, m2, and g, we get:
T = 50N + 75N + P
Simplifying, we get:
T = P + 125N

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3.The ranking of quantities in decreasing order of distance is as follows: 1 Mm (Megameter) > 1 km (Kilometer) > 100 m (Meter) > 1 cm (Centimeter) > 50 mm (Millimeter) > 1 mm (Millimeter) > 5 million nm (Nanometer).

8. A) When the size of a milk chocolate bar is reduced to 5.000 g, the amount of sugar in milligrams is approximately 73.15 mg.

b) The percentage of sugar in a 14.630 g milk chocolate bar is approximately 63.60%.

10 A) 4.1 ounces of a steroid ointment is approximately 120 grams.

D) Each blueberry high-fiber muffin contains approximately 24 grams of dietary fiber.

1. Ranking the quantities in decreasing order of distance:

1 Mm (Megameter) --> 1 km (Kilometer) --> 100 m (Meter) --> 50 mm (Millimeter) --> 1 cm (Centimeter) --> 1 mm (Millimeter) --> 5 million nm (Nanometer)

2. a). To find the amount of sugar in milligrams when the size of the milk chocolate bar is reduced to 5.000 g, we can use the proportion:

14.630 g / x = 5.000 g / 1000 mg

Solving for x, we get:

x = (5.000 g * 14.630 g) / 1000 mg ≈ 73.15 mg

So, when the chocolate bar size is reduced, the amount of sugar in milligrams will be approximately 73.15 mg.

b). To calculate the percentage of sugar in a 14.630 g milk chocolate bar, we use the formula:

Percentage = (Amount of sugar / Total weight) * 100

Percentage = (9.315 g / 14.630 g) * 100 ≈ 63.60%

So, the percentage of sugar in a 14.630 g milk chocolate bar is approximately 63.60%.

10. a). To convert 4.1 ounces of a steroid ointment to grams, we use the conversion factor:

1 lb = 16 oz, 1 lb ≈ 453.592 g

4.1 oz * (1 lb / 16 oz) * 453.592 g ≈ 119.0792 g ≈ 120 g (to two significant figures)

So, the pharmacist needs to prepare approximately 120 grams of ointment.

D). If blueberry high-fiber muffins contain 51% dietary fiber and a package weighing 16 oz contains six muffins, we can calculate the amount of fiber in each muffin as follows:

Amount of fiber per muffin = (Weight of one muffin * Percentage of dietary fiber) / 100

Amount of fiber per muffin = (16 oz / 6) * (51 / 100) * 28.3495 g ≈ 24 g (to two significant figures)

Each blueberry high-fiber muffin contains approximately 24 grams of dietary fiber.

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A particle have to be placed so that the ball pulled on the particle just as hard as the earth does, While the calculation is mathematically possible, it is not practically feasible to set up this experiment in real life.

To answer your question, we need to first understand that the force of gravity between two objects depends on their masses and the distance between them. The force between the 100 kg ball and the particle is given by the formula:
F = G * (m1 * m2) / r^2
where F is the force, G is the gravitational constant, m1 and m2 are the masses of the objects, and r is the distance between them.
In this case, we want the force between the ball and the particle to be equal to the force of gravity between the particle and the earth. This means we need to set up the equation:
G * (100 kg * m2) / r^2 = G * (m2 * 5.97 x 10^24 kg) / (6.38 x 10^6 m)^2
Simplifying this equation, we get:
100 / r^2 = 5.97 x 10^24 / (6.38 x 10^6)^2
Solving for r, we get:
r = sqrt(100 * (6.38 x 10^6)^2 / 5.97 x 10^24) = 4.4 x 10^-3 meters
So the particle would have to be placed about 4.4 millimeters away from the 100 kg ball to experience the same gravitational force as it does from the earth.
It is not reasonable to set up this as an experiment because the force of gravity between such small objects is incredibly weak and difficult to measure accurately. The equipment required to make such a measurement would be extremely sensitive and expensive, and any external influences such as air currents or vibrations could easily disrupt the experiment. Additionally, the ball and particle would likely have to be isolated from all other sources of gravity, which would be nearly impossible to achieve.

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The cue ball's final velocity is 0.453 m/s, or 0.90 m/s.

The pace at which an item goes in one direction is known as its velocity. As the velocity of a car driving northward on a highway or the pace at which a rocket takes off. The vector quantity velocity (v), denoted by the formula v = s/t, quantifies deformation (or shift in position, s), over change in time (t).

The displacement that such an object or particles experiences with regards to time is expressed vectorially as velocity. The meters per second (m/s) is the accepted unit of velocity profile (sometimes known as speed).

Let "v" represent the ball's ultimate speed.

Apply the law of linear momentum conservation.

Total initial momentum is = Total final momentum

=(0.17 x 1.3) + (0.16 x 0) = (0.17 x v) + (0.16 x 0.90)

0.221 = 0.17v + 0.144

0.17 v = 0.221 - 0.144

v = (0.077) / (0.17)

v = 0.453 m/s

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Answer:

C.

Explanation:

c. the source is written by the person who conducted the experiment. A primary source is an original piece of information created at the time under study. It can be a diary, a letter, a photograph, a recording, or any other type of artifact. It provides firsthand information about an event or topic, and is created by a person who was directly involved or witnessed it.

If the wire is tipped at an angle of 15.0° with the horizontal, we need to determine the force it will now feel. The length of the wire that will be in the magnetic field is relevant to finding the answer.

When a wire carrying current is placed in a magnetic field, it experiences a force perpendicular to both the direction of current flow and the magnetic field. In this case, when the wire is tipped at an angle of 15.0° with the horizontal, only a component of the wire's length will be in the magnetic field.

To find the force, we need to consider the effective length of the wire in the magnetic field. This can be calculated by multiplying the actual length of the wire by the cosine of the angle between the wire and the magnetic field. Once we have the effective length, we can use the formula for the force on a current-carrying wire in a magnetic field, which is given by the equation F = BIL, where B is the magnetic field strength, I is the current, and L is the length of the wire in the field. By substituting the effective length into the equation, we can determine the force the wire will experience.

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There are many reasons actually...

◇ Clayey soil is easy to mould than the other soils.

The other soils (like sandy soil & loamy soil) are grainy or dry in nature & cannot be moulded. In the ancient times, when technology & the know-hows were still not introduced, people used clayey soul to make earthern pots to store stuff. This practice still continues even today.

◇ It keeps water cool.

Ever wondered why water stored in the earthenware remains cool even on a sunny day? It's because the heat required for evaporation is taken from water inside the pot & thus it cools the water stored inside.

◇ Clayey soil is also moist, durable, more plastic like & easy to retain making it ideal for potters to make earthenware.

__________

Clay soil is used to make earthenwares because, clay can be easily molded to desired sizes and shapes. Clay absorbs water moiety and make the pot very cool inside.

Clay is a type of soil made by the sedimentation process near water resources.  They are rich in minerals. Clay is rich in silicates and intermolecular force in the soil is comparatively less and can be easily molded any shape and size.

When clay is fired to a high enough temperature, the glass-forming materials in the ceramic form a liquid glass. This glass bridges the gaps between the clay particles. As the pottery cools at the end of the firing process, the glass between the clay particles solidifies again.

Clay pots make the water cooler inside. Hence, clay is used to make earthen wares.

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Answer:

Velocity = Displacement by time

Explanation:

Answer:

The formula to calculate velocity =distance(s) ÷ time taken(t)

Answer:

it is chemical energy

Explanation:

that is the energy used by our body, so it is the one that we will loose. and the energy that we gain is also chemical energy

Answer:

To make the  lifting more efficient. It lets there be less taxing and saves a ton of energy!!

Explanation:

Answer:

In physics and engineering, a resultant force is the single force and associated torque obtained by combining a system of forces and torques acting on a rigid body. The defining feature of a resultant force, or resultant force-torque, is that it has the same effect on the rigid body as the original system of forces.

I hope it's helpful!

Answer:

it is a force that result in anything to be done

The wavelength of the laser is 0.4464 mm.

The equation for the diffraction grating is given as:

dsinθ = mλ

where d is the distance between the slits (in meters), θ is the angle between the central maximum and the mth bright fringe (in radians), m is the order of the bright fringe, and λ is the wavelength of the light (in meters).

The equation to calculate the wavelength of a laser is λ = d × sin θ/m, where d is the distance between two adjacent slits on the diffraction grating (in this case, 1000 slits/mm, which is equivalent to 1 mm), θ is the angle of the fringe relative to the central axis (in this case, 26 degrees), and m is the order of the fringe (in this case, m=1). Therefore, plugging in the values:

λ = 1 mm × sin 26°/1 = 0.4464 mm

The wavelength of the laser is 0.4464 mm.

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(a) The mechanical advantage of the ramp is determined as 2.5.

(b) The pulley provides additional advantage since it assisted the boy in pulling up the load.

The mechanical advantage of an object is the ratio of output force to input force, hence it is called force ratio.

M.A = Lp/h

where;

M.A = 10/4

M.A = 2.5

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Answer:

Explanation:

(a) Agent exerting the force: Fingers

Object on which it acts: Piece of lemon

Effect of the force: The force applied by squeezing the lemon between the fingers results in the extraction of juice from the lemon.

(b) Agent exerting the force: Hand

Object on which it acts: Toothpaste tube

Effect of the force: The force applied by squeezing the toothpaste tube results in the toothpaste being pushed out of the tube.

(c) Agent exerting the force: Load (weight)

Object on which it acts: Spring

Effect of the force: The weight of the load applies a force on the spring, causing the spring to stretch or compress, depending on the direction of the force.

(d) Agent exerting the force: Athlete's body

Object on which it acts: Bar

Effect of the force: The force applied by the athlete jumping exerts an upward force on their body, allowing them to clear the bar at a certain height.

The acceleration due to gravity on the surface of planet X is 4 N/kg.

Acceleration due to gravity is the acceleration gained by an object due to gravitational force.

To calculate the magnitude of the acceleration due to gravity on the surce of planet X, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the acceleration due to gravity is 4 N/kg.

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Electromagnetic radiation is a type of radiation in which the energy is carried through oscillating electromagnetic fields. It contains different types of radiation with different frequencies.

The following are the different types of electromagnetic radiation, ranked by frequency (from lowest to highest frequency:

Radio waves: Radio waves have the longest wavelength and the lowest frequency in the electromagnetic spectrum. They are used in television and radio transmissions, as well as in mobile phones and other communication devices. They have a frequency range of 3 kHz to 300 GHz.

Microwaves: Microwaves have a higher frequency than radio waves but lower than infrared radiation. They are used in microwave ovens, as well as in communication devices such as mobile phones, Wi-Fi routers, and satellite communications. They have a frequency range of 300 MHz to 300 GHz.

Infrared radiation: Infrared radiation has a higher frequency than microwaves but lower than visible light. It is used in infrared heaters, remote controls, and some medical applications. It has a frequency range of 300 GHz to 400 THz.

Visible light: Visible light is the part of the electromagnetic spectrum that we can see with our eyes. It has a higher frequency than infrared radiation but lower than ultraviolet radiation. It is used in lighting and optical communication devices. It has a frequency range of 400 THz to 800 THz.

Ultraviolet radiation: Ultraviolet radiation has a higher frequency than visible light but lower than X-rays. It is responsible for sunburns and tans. It is also used in some medical applications. It has a frequency range of 800 THz to 30 PHz.X-rays:X-rays have a higher frequency than ultraviolet radiation but lower than gamma rays. They are used in medical imaging and airport security scanners. They have a frequency range of 30 PHz to 30 EHz.

Gamma rays: Gamma rays have the highest frequency and the shortest wavelength in the electromagnetic spectrum. They are produced by the decay of radioactive materials and in nuclear reactions. They have a frequency range of 30 EHz to 3000 EHz.

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Answer:

Magnetic forces are non contact forces; they pull or push on objects without touching them. Magnets are only attracted to a few 'magnetic' metals and not all matter. Magnets are attracted to and repel other magnets.

Explanation:

Answer: The greater an object's mass, the more gravitational force it exerts.

Explanation: So, to begin answering your question, Earth has a greater gravitational pull than the moon simply because the Earth is more massive. Sorry if I get this wrong. I am in 5th grade! ♥

The gravitational attraction between the Sun and Earth is stronger than the attraction between the Sun and the Moon, principally because of the Sun's greater mass and greater distance from Earth.

An object's mass affects how much gravitational pull it exerts. Both the Earth and the Moon are much less massive than the Sun. Approximately  330,000 times more massive than the Earth, and roughly 27 million times more massive than the Moon, is the Sun. Because of the Sun's greater mass, its gravitational pull is thus much stronger.

The strength of the gravitational force between two objects is greatly influenced by their distance from one another. The Sun and Earth are separated from one another by a far smaller distance than the Sun and Moon. The Sun is located roughly 150 million kilometers from Earth, while the Moon is located roughly 384,400 kilometers from the Sun on average. The inverse square law asserts that the gravitational force decreases with increasing distance, and that it is only one-fourth as strong when two objects are twice as far apart.

Hence, the gravitational force between the sun and earth is larger than the sun and the moon due the mass of the sun and earth is greater than the moon and sun. The distance between the sun and the earth is comparatively smaller than the distance between the sun and the moon.

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Explanationnswer:



Answer:find out ;/

Explanation:

Answer:

Aircraft never crash because of one single issue. It's almost always a combination of factors that lead to an accident. Whilst flying is extremely safe, typical reasons why planes crash include pilot error, technical failures, bad weather, terrorism, and pilot fatigue.

Answer The force of the air pushing up on the plane is

equal to the force of gravity pulling down on the

plane.

Retrograde motion is the apparent motion of a planet or other celestial body when it appears to move backward in the sky. This phenomenon is due to the relative motion of Earth and the observed object.

As Earth orbits around the sun, it occasionally passes by another planet, causing it to appear to move backward in the sky for a short period of time. This backward motion appears to move from east to west among the stars, which is the opposite direction of the normal motion of celestial bodies.

The ancient astronomers observed retrograde motion and it was a challenge to explain until the heliocentric model of the solar system was proposed by Copernicus in the 16th century. This model suggested that the planets revolve around the sun in circular orbits and explained the observed retrograde motion as a result of the difference in orbital speeds of the planets. Retrograde motion is a fascinating phenomenon and understanding it has helped us gain knowledge about the motions of celestial objects.

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Pressure equals force divided by area.

P=F/A

The equation above shows that pressure is directly proportional to force, but inversely proportional to area. At a constant area, pressure increases as the magnitude of the force applied also increases.

for example;

A heavy sofa exerts more pressure on the floor compared to an empty box in the same area.

Pressure increases as the area decreases.

A finger exerts more pressure by pressing on the skin compared to the pressure exerted by a needle attached to a syringe. A finger may cause slight depression on the skin when pressed, but may not inflict pain at all.

however, when the same force is applied to a needle, the pressure produced is large enough to hurt the skin.

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Answer: The greater the area, the smaller the pressure applied and the smaller the area, the greater the pressure applied

Explanation: As one applies a certain force to a body of a large area, the pressure applied will be little and a force applied to a body of a small area, the pressure applied will be greater for pressure will tend to be greater if applied to a body of small area and therefore the force applied will create a strong pressure

Answer:

radio waves

Explanation:

Answer:

the answer is A radio waves

The velocity of the combined weight at rest following the collision. 15 m/sec.

The amount of material that makes up every object and body is the simplest method for comprehending mass. Everything that we can see has mass. Examples of objects with mass include a desk, a seat, your mattress, a football, a glass, or even air. The mass of a thing determines whether it is light or heavy.

A measure of how much matter is present in or makes up a physical body. In classical mechanics, an object's mass is crucial to Newton's motion laws because it influences the force needed to accelerate it and, consequently, how much inertia it has.

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Answer:

 An amp is one C of charge per second, two minutes is 120 seconds. So current is 10 C/120 sec which is 1/12 th of an Amp.