what is the difference between weak and strong forces I need help now I will give brainliest

part a.

the total energy of Saul and the toboggan  is 70530 J

part b.

The height of the hill is  235.1 m.

part c.

Saul's velocity at the bottom of the hill will be  22.3 m/s.

part d.

Saul's height when he is moving at a velocity of 9.5 m/s is 10.5 m

The total energy of Saul and the toboggan is the addition all of potential energy and kinetic energy.

we know that the initial total energy = potential energy at top of hill

Therefore total energy is gien as

initia total energy  = mass of Saul + mass of toboggan x gravity x height

initia total energy  = (30 kg + 10 kg) x (9.81) x (20 m)

initia total energy  = 5886 J

Total energy  = potential energy + kinetic energy

Total energy = (30 kg + 10 kg) (9.81 ^2) x (20) + (30 kg + 10 kg) x (15)^2/2

= 70530 J

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Answer:

4

Explanation:

because people could lie about it

The coefficient of kinetic friction between the block and the surface 0.245.

Friction is a force that opposes relative motion and manifests itself at the interfaces of bodies as well as inside, as in the case of fluids. Leonardo da Vinci was the first to conceive the idea of friction coefficient.

The characteristics of the surfaces, the environment, surface details, the presence of lubricant, etc. all affect how much friction there is between surfaces.

There are a number of theories on what generates static friction, and like other friction-related ideas, each one holds true in some situations but falls short in others.

Therefore, The coefficient of kinetic friction between the block and the surface 0.245.

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Answer:

At point A the car has more height than at point B. This means there is more potential energy at point A than at point B.  As the car moves down the ramp from Point A, the potential energy that it starts with is converted into kinetic energy as it moves. The mechanical energy will remain the same because of the principle of conservation of mechanical energy

Explanation:

The Principle of Conservation of Mechanical Energy

In the absence of friction, the total mechanical energy is conserved. That means that

\(E_m=U+K\) is constant, being U the potential energy and K the kinetic energy

U=mgh

\(K=\frac{mv^2}{2}\)

The theory shown above will help us to complete the sentences to come:

At point A the car has more height than at point B. This means there is more potential energy at point A than at point B.  As the car moves down the ramp from Point A, the potential energy that it starts with is converted into kinetic energy as it moves. The mechanical energy will remain the same because of the principle of conservation of mechanical energy

Answer:

The correct answer is option A: 3.00 × 10^(-11) m.

Explanation:

To find the wavelength of a gamma ray with a frequency of about 10^19 s^(-1), we can use the equation:

wavelength = speed of light / frequency

Given:

Speed of light (c) = 3.00 × 10^8 m/s

Frequency (f) = 10^19 s^(-1)

Substituting the values into the equation:

wavelength = (3.00 × 10^8 m/s) / (10^19 s^(-1))

To simplify the expression, we can rewrite the denominator as (1 / 10^(-19)) s:

wavelength = (3.00 × 10^8 m/s) / (1 / 10^(-19)) s

To divide by a fraction, we multiply by its reciprocal:

wavelength = (3.00 × 10^8 m/s) × (10^(-19) s)

Applying the properties of exponents, we can add the exponents when multiplying with the same base:

wavelength = 3.00 × 10^(-11) m

Therefore, the wavelength of the gamma ray is approximately 3.00 × 10^(-11) m.

-- If A and B are pointing in exactly opposite directions, then their sum A+B is the minimum possible value.  A+B = 2 N in the same direction as B.

-- If A and B are pointing in exactly the same direction, then their sum A+B is the maximum possible value.  A+B = 6 N in that same direction.  

Given:

The amount of sample is

The half-life of the radioactive substance is

Required: To find the amount of substance after t = 8000 years

Explanation:

The amount of substance after 8000 years can be calculated by the formula

On substituting the values, the amount of substance will be

Final Answer: The amount of substance present after 8000 years is 3.97 g

Answer:

Speed = 10.24 m/s.

Explanation:

Given the following data;

Distance = 100m

Time = 9.77

To find her speed;

Speed can be defined as distance covered per unit time. Speed is a scalar quantity and as such it has magnitude but no direction.

Mathematically, speed is given by the equation;

\(Speed = \frac{distance}{time}\)

Substituting into the equation, we have;

\(Speed = \frac{100}{9.77}\)

Speed = 10.24 meter per seconds.

Answer: 35m/s

Explanation: The formula for kinetic energy is K=1/2mv^2.

K=1225J

m=2kg

We want to solve for v to find how fast the ball is moving.

1225=1/2 * 2 * v^2

1225 = 2/2 * v^2

1225 =  1 * v^2

1225 = v^2

sqrt1225 = v

35 = v

for the units, J = kg * m^2/s^2, the kg cancels out, sqrt removes the square from m^2/s^2, leaving m/s.

The car undergoes an acceleration a such that

(45.0 km/h)² - 0² = 2 a (90 m)

90 m = 0.09 km, so

(45.0 km/h)² - 0² = 2 a (0.09 km)

Solve for a :

a = (45.0 km/h)² / (2 (0.09 km)) = 11,250 km/h²

Ignoring friction, the net force acting on the car points in the direction of its movement (it's also pulled down by gravity, but the ground pushes back up). Newton's second law then says that the net force F is equal to the mass m times the acceleration a, so that

F = (4500 kg) (11,250 km/h²)

Recall that Newtons (N) are measured as

1 N = 1 kg • m/s²

so we should convert everything accordingly:

11,250 km/h² = (11,250 km/h²) (1000 m/km) (1/3600 h/s)² ≈ 0.868 m/s²

Then the force is

F = (4500 kg) (0.868 m/s²) = 3906.25 N ≈ 3900 N

Answer:

mechanical weathering

Explanation:

Answer:

Mechanical weathering is responsible for the composition of a rock

Explanation:

The answer is (D)

The possible temperature of the system after the iron has been added to the beaker is 52°C.

option B.

A system is said to be in thermal equilibrium when there is no temperature difference between system and surroundings. Temperature, as you know, measures how hot or cold a body is with respect to a standard object.

When a system ( cold and hot body) reaches thermal equilibrium or equilibrium temperature, the heat lost by the hot body will be equal to the heat gained by the cold body.

heat gained by the water = heat lost by the iron

The equilibrium temperature will be greater than the initial temperature of the cold body but less than the final temperature of the hot.

Thus, the only possible answer for the equilibrium temperature of mixture is 52⁰C.

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Therefore, the component of vector C is -4.125m in the x direction and 6.125m in the y direction.

Physical objects called vectors need both magnitude and direction. Scalars include things like height, mass, area, and volume. Vectors can take the forms of motion, velocity, and acceleration.

In order to find vector C, we can commence by rearranging the equation 2A - B - 4C = 0:

2A - B - 4C = 0

2A - B = 4C

C = (2A - B)/4

We can now determine the elements of vectors A and B:

Vector A: Ax = -3m, Ay = 10m

Vector B: Bx = 8.5m, By = -3.5m

When we enter these numbers into the vector C equation, we obtain:

Cx = (2Ax - Bx)/4 = (2(-3m) - 8.5m)/4 = -4.125m

Cy = (2Ay - By)/4 = (2(10m) - (-3.5m))/4 = 6.125m

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Answer:

Explanation:

Do math

Answer:

newton's first law (sorry its really late i know you prob don't need it anymore

Explanation:

The number and wattage of lamps required to illuminate the workshop would be approximately 8 lamps and 70 watts respectively.

To estimate the number and wattage of lamps required to illuminate a workshop space of 60x1.5 meters, we can follow these steps:

Calculate the area of the workshop:

Determine the total lumens required:

Adjust for the coefficient of utilization and luminous efficiency:

Adjust for space-height ratio and candle power depreciation:

Determine the number of lamps required:

Determine the wattage of each lamp:

Therefore, approximately 8 lamps with a wattage of 70 watts each would be required to illuminate the workshop space.

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Answer:

C. They allow light to pass only if their directions of polarizations are exactly 90° apart.

Explanation:

If two polarizers are placed in a straight line, one behind the other, they allow light to pass only if their directions of polarizations are exactly 90° apart.

Answer:

Ur answer is 12 sir!

Explanation:

HAve a good day sir

Answer:

Wl = 1740 N

Explanation:

maximum lift weight unaided = force exerted (F) = 650 N

length of the wheelbarrow (L) = 1.4 m

weight of the wheelbarrow (w) = 80 N

distance of center of gravity of the wheel barrow from the wheel = 0.5 m

distance of center of gravity of the load from the wheel = 0.5 m

find the weight of the load (Wl)

from the diagram attached we can see that there is going to be a rotation about the axis A. let clockwise rotation be positive

ΣT = (F x 1.4) - ((Wl x 0.5) + (w x 0.5) = 0

(F x 1.4) = ((Wl x 0.5) + (w x 0.5)

Wl =

Wl =

Wl = 1740 N

Mechanical energy changes when a roller coaster starts at a height of 40 meters and reaches a height of 20 meters. The potential energy decreases, while the kinetic energy increases.

When a roller coaster starts at a height of 40 meters and reaches a height of 20 meters, mechanical energy changes. In physics, mechanical energy is the sum of potential and kinetic energy that is present in the objects. When an object is moved, it gains or loses energy, thus the mechanical energy changes. There are two forms of mechanical energy, namely kinetic energy and potential energy. Kinetic energy is the energy that a moving object possesses due to its motion, while potential energy is the energy that an object possesses due to its position or shape.
In the case of a roller coaster, when it starts at a height of 40 meters, it has potential energy that is equal to its mass multiplied by the acceleration due to gravity multiplied by its height. As it moves down the track, the potential energy gets converted into kinetic energy, which is the energy of motion. When the roller coaster reaches a height of 20 meters, it has a lower potential energy compared to when it started. The difference in potential energy is equal to the amount of work done by the force of gravity in bringing the roller coaster down from a height of 40 meters to a height of 20 meters. At the same time, the roller coaster has a higher kinetic energy than when it started, as it gained speed during the descent.
Therefore, in summary, mechanical energy changes when a roller coaster starts at a height of 40 meters and reaches a height of 20 meters. The potential energy decreases, while the kinetic energy increases.

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The age of the rock is 9 * 10^9 years and there is no rock that can be as old as this age on earth.

The term radioactive decay has to do with the process by which a radioactive nuclide disintegrates so as to obtain the daughter nucleus. The radioactive decay may occur by alpha or by beta radiation.

In this case, we are told that only 25% of the original uranium 238 isotope of half life 4.5 * 10^9 years still remains.

Using the formula;

0.693/\(t_{\frac{1}{2}\) = 2.303/t log (No/N)

\(t_{\frac{1}{2}\) = half life of the isotope

N= amount of isotope at time t

No = amount of isotope initially present

Then;

0.693/4.5 * 10^9 = 2.303/t log(No/0.25No)

1.54 * 10^-10 =  1.39/t

t = 1.39/1.54 * 10^-10

t = 9 * 10^9 years

There is no rock that is this much old since the average age of the earth is 4.5 billion years.

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Answer:

What are your options? also i believe the answer may be ecosystem.

Explanation:

There are both biotic and abiotic factors in an ecosystem. Be cause living organisms Are Biotic. While water and rocks are abiotic which are needed to form an ecosystem.

If there is no existence of capacitors in our world there would be no electrical or electronic engineering.

A capacitor is a device that stores electrical energy in an electric field. It has two terminals and is a passive electrical component. Capacitance refers to a capacitor's effect. A capacitor commonly referred to as a condenser is one of the fundamental parts needed to create electronic circuits. Without fundamental parts like resistors, inductors, diodes, transistors, etc., a circuit's design is incomplete or it won't work properly.

Energy storage is capacitors' most popular application. Power conditioning, signal coupling or decoupling, electronic noise filtering, and remote sensing are further applications. Capacitors are employed in a wide variety of industries and have integrated into daily life due to their numerous applications.

There are numerous significant uses for capacitors. They are employed in digital circuits, for instance, to prevent the loss of data saved in big computer memories during a brief loss of power. The electric energy held in such capacitors keeps the data from being lost during a brief power outage.

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Answer: a. It would be 140 N

I don’t know, I just got it right

The potential energy is at the maximum when you reach the top of your jump on a trampoline. The correct answer is option B.

Potential Energy is the type of energy an object possesses by virtue of its position relative to others, stresses within itself, electric charge, and other factors. Potential energy exists in various forms, including gravitational potential energy, elastic potential energy, chemical potential energy, and electrical potential energy.

This type of energy can be converted into another type of energies. Examples, a charged battery has potential energy and it can be used as electrical potential energy. Petrol, diesel and and gas have chemical potential energy and be used as kinetic energy.

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Answer:

1) The force per egg caused by the weight of the block is 17.15 N

2) \(A= 0.686\ mm^2\)

Explanation:

Pressure

The pressure is computed as the force acting upon a surface divided by the area of the surface :

\(P=\frac{F}{A}\)

The weight of an object of mass m is:

W = mg

Where g is the gravitational acceleration of \(9.8\ m/s^2\)

The cement block has a mass of m=14 kg, thus its weight is:

W = 14*9.8

W = 137.2 N

1) This weight is evenly distributed over the 8 eggs, thus the force per egg is:

F = 137.2 N/8= 17.15 N

The force per egg caused by the weight of the block is 17.15 N

2) It's given the pressure on each egg as \(P= 25 \ N/mm^2\) and we know the force acting on each one is F=17.15 N. To find the contact area we solve the formula of the pressure for A:

\(\displaystyle A=\frac{F}{P}\)

\(\displaystyle A=\frac{17.15}{25}\)

\(\mathbf{A= 0.686\ mm^2}\)