a 3.0-m-long rigid beam with a mass 110 kg is supported at each end. an 70 kg student stands 2.0 m from support 1. how much upward force does support 1 exert on the beam?

Answer:

-4000 m/s²

Explanation:

Given:

Δx = 0.200 m

v₀ = 40.0 m/s

v = 0 m/s

Find: a

v² = v₀² + 2aΔx

(0 m/s)² = (40.0 m/s)² + 2a (0.200 m)

a = -4000 m/s²

Some benefits of using a scale model by planetary scientists are:

Scientists measure the distance between planets using a variety of methods, including triangulation, radial velocity method and scale model method. Scientists use triangulation to determine the distance from Earth to other planets. They observe the planet from two different positions on Earth and use the angles of observation to calculate the planet's distance.

Radial Velocity Method uses the Doppler shift of a planet's light to determine its distance. Scientists can determine how fast a planet is moving towards or away from Earth and use this information to calculate its distance.

Scale model method can be easily visualized and allows for easy comparison between different parts of the system. The model can be easily shared and discussed with colleagues, helping to build consensus and develop a deeper understanding of the system as a whole.

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Answer:…..

Explanation:

The quantity of heat energy supplied to the water from the metal is 2520 J.

The quantity of heat energy needed to increase the temperature of one kilogram of a substance by one degree Celsius is known as the substance's specific heat capacity.

Here,

Mass of the water in the container, m = 50 g = 0.05 kg

Initial temperature of the water, T₁ = 20°C = 293 K

Final temperature of the water, T₂ = 32°C = 305°C

Specific heat capacity of water, C = 4200 J/kgK

The expression for the quantity of heat energy supplied to the water from the metal is given by,

Q = mcΔT

Q = mC(T₂ - T₁)

Applying the values of m, C, T₁ and T₂

Q = 0.05 x 4200 (305 - 293)

Q = 210 x 12

Q = 2520 J

Hence,

The quantity of heat energy supplied to the water from the metal is 2520 J.

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The orientation of the magnets that gives the strongest repulsion because these poles and facing each other that is then leaves highest flux density of the poles for a force of repulsion to be very high

i need help with this too:( if u found out the answer lmk

Answer:

The person can jump 48 m on the Moon

Explanation:

The question parameters are;

The maximum long jump distance of a person on Earth, \(R_{max}\) = 3 m

The acceleration due to gravity on the Moon = 1 ÷ 16 of that on Earth

The distance the person can jump on the Moon is given as follows;

A person performing a jump across an horizontal distance on Earth (under gravitational force) follows the path of the motion of a projectile

The horizontal range, \(R_{max}\), of a projectile motion is found by using the following formula

\(R_{max} = \dfrac{u^2}{g}\)

Where;

g = The acceleration due to gravity = 9.8 m/s²

Therefore, we have;

\(R_{max} = 3 \, m = \dfrac{u^2}{9.8 \, m/s^2 }\)

u² = 3 m × 9.8 m/s² = 29.4 m²/s²

Therefore, on the Moon, we have;

The acceleration due to gravity on the Moon, \(g_{Moon}\) = 1/16 × g

∴ \(g_{Moon}\) = 1/16 × g = 1/16 × 9.8 m/s² ≈ 0.6125 m/s²

\(R_{max \ Moon} = \dfrac{u^2}{g_{Moon}} = \dfrac{29.4 \ m^2/s^2}{0.6125 \, m/s^2 } \approx 48 \, m\)

The maximum distance the person can jump on the Moon with the same velocity which was used on Earth is \(R_{max \ Moon}\) ≈ 48 m

The formula for calculating force is:

force = mass x acceleration

The force is 14 Newtons (N).

What is force?

Force is a physical quantity that describes the interaction between two objects, resulting in the acceleration of one or both objects. Force can cause a stationary object to move or change its direction, or it can alter the speed or direction of a moving object. Force is measured in the unit of Newtons (N) and is represented by the symbol F.

In this case, we have a mass of 3.5 kg and an acceleration of 4 m/sec². To find the force, we simply multiply the two values:

force = 3.5 kg x 4 m/sec²

To calculate this, we can use a calculator or do the multiplication by hand. Here's how to do it step-by-step:

Write down the values given in the problem:

mass = 3.5 kg

acceleration = 4 m/sec²

Write down the formula for force:

force = mass x acceleration

Substitute the values given in the problem into the formula:

force = 3.5 kg x 4 m/sec²

Multiply the two values:

force = 14 kg m/sec²

Simplify the unit by replacing kg m/sec² with Newtons (N), which is the unit of force:

force = 14 N

Therefore, the force is 14 Newtons (N).

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Option (C) 4q is the correct answer since it experiences the largest force.

When considering Coulomb’s Law and forces of charged particles, we can determine which of the three right-hand charges experiences the largest force by using Coulomb's Law:

$F_e = \frac{kq_1q_2}{r^2}$Where,F is the force of attraction between the two charges, k is Coulomb's constant (9 x 10^9 Nm^2/C^2), q1 and q2 are the charges in Coulombs, and r is the distance between the two charges in meters.

So, if we place a test charge, q, at the center, the charges at 2r would experience the largest forces.

The force between q and the charges of 2q and 4q would be equal but opposite in direction since they are equidistant from the test charge and have charges with the same sign. The net force acting on q would be zero.

Therefore, both choices (D) q and 2q are tied and (E) q and 4q are tied is incorrect.

So, in this case, the largest force will be experienced by the particle with the largest charge, which is choice (C) 4q.

Therefore, Option (C) 4q is the correct answer since it experiences the largest force.

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Answer:

No chemical bonds are broken or formed in melting butter, so it is not a chemical change. The melting process is only a physical change, the change of state from solid to liquid.

Answer:

I think it's physical change because originally it was a solid but now it's a liquid and its chemical properties have not changed only shape

Hi! Let's see.

Explanation:

Data:

==================================================================

We apply the distance formula:

We replace by the data:

It divides:

Answer: The distance is 15 meters.

Cordially Alejanndraax. Greetings!

The distance covered by the machine is 15 m.

Work done on an object is defined as the dot product of the force applied on the object and the displacement of the object.

Here,

Amount of work done by the machine, W = 12000 J

Force exerted on the machine, F = 800 N

The equation for work done,

W = F.s

Therefore, displacement,

s = W/F

s = 12000/800

s = 15 m

Hence,

The distance covered by the machine is 15 m.

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Answer:

You would have gone 12000 meters in south direction.

Explanation:

Since velocity = displacement/time, we would know two values which are velocity and time. We can find displacement travelled by solving the equation:

\( \displaystyle{20 \ \text{m/s} = \dfrac{ \vec s}{10 \ \text{min}}}\)

However, we cannot find the displacement right away as the unit of time is not same yet. We will have to convert from 10 minutes to seconds unit.

We know that 1 minute = 60 seconds. By multiplying 10 both sides, we have:

10 minutes = 10×60 seconds = 600 seconds. Hence:

\( \displaystyle{20 \ \text{m/s} = \dfrac{ \vec s}{600 \ \text{s}}}\)

Now we can solve for displacement:

\( \displaystyle{20 \ \text{m/s} \: \cdot \: 600 \ \text{s}= \vec s} \\ \\ \displaystyle{12000 \ \text{m}= \vec s}\)

Since displacement is a vector quantity, this means that the equation you just solved for value is just its magnitude. We know that the velocity has south direction. Therefore, the displacement travelled is 12000 meters south.

Answer:

Bang on a drum.  

Explanation:

Amplitude is making loud sounds

Molecules can be made up of two atoms of the same element for example oxygen gas is made up only of oxygen atoms.

Two or more atoms of the same or different element that are joined together to form a molecule are referred to as molecules. A molecule can be heteronuclear, which is a chemical compound made up of more than one element, like water, or homonuclear, which means it is made up of atoms of one chemical element, like oxygen (O2) (H2O).

When two or more atoms from the same element chemically combine, a molecule is created. A compound is created if the types of atoms differ from one another. Not all molecules are compounds because some molecules, like ozone (O3) and oxygen gas (pictured above), only contain one type of atom or element.

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The total angle, in radians, through which a point on the flywheel rotates is 7540 radians

From the question, we are to determine the total angle in radians

Using the formula,

\(\omega = \frac{\theta}{t}\)

Where \(\omega\) is the angular velocity

\(\theta\) is the angle

and t is the time

From the given information,

\(\omega = 30 \ rev/s\)

Convert to rad/s

\(\omega = 30 \times 2\pi \ rad/s\)

\(\omega = 188.496 \ rad/s\)

and t = 40 s

From the formula

\(\omega = \frac{\theta}{t}\)

\(\theta = \omega t\)

∴ \(\theta = 188.496 \times 40\)

θ = 7539.822 rad

θ ≅ 7540 rad

Hence, the total angle, in radians, through which a point on the flywheel rotates is 7540 radians

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Hi there!

Recall the equation for torque:
\(\large\boxed{\Sigma \tau = rF}\)

∑τ = Net Torque (Nm)

r = lever arm (m)

F = Force (N)

Rearrange to solve for force:

\(F = \frac{\tau}{r}\)

Plug in the givens:

\(F = \frac{45}{0.21} = \boxed{219.05 N}\)

Answer:

1.68N

Explanation:

W=F*d

KE=1/2*M*V^2

M=32kg

V= 5.1m/s

D=50m

0.5(32)(5.1^2)= 416 J

Initial energy=500 J

final energy= 416 J

lost energy= 500-416

heat lost to friction=84 J

84=F*50

84/50=F*50/50

F=1.68N

The stagnation pressure loss due to heating is approximately 41.2%, or the outlet stagnation pressure is about 58.8% of the inlet stagnation pressure.

To solve this problem, we can use the conservation equations for mass, momentum, and energy, along with the perfect gas law and the relations for specific heats.

Since the flow is isentropic (i.e., there is no heat transfer or work done), we can assume that the static and stagnation properties are related by:

p0 = p(1 + 0.5*(gamma - 1)M²)^(gamma/(gamma-1))

T0 = T(1 + 0.5*(gamma - 1)M²)

rho0 = rho(1 + 0.5*(gamma - 1)*M²)^(1/(gamma-1))

where p, T, and rho are the static pressure, temperature, and density, respectively, gamma is the specific heat ratio, M is the Mach number, and the subscript 0 denotes stagnation properties.

Let's begin by finding the Mach number at the exit of the burner. Since the flow is one-dimensional and there is no frictional effects, we can assume that the mass flow rate is constant:

mdot = rhoAV

where mdot is the mass flow rate, A is the cross-sectional area of the burner, and V is the velocity. Using the conservation of mass equation, we have:

rho1A1V1 = rho2A2V2

where subscript 1 denotes the properties at the entrance to the burner and subscript 2 denotes the properties at the exit from the burner. Since the cross-sectional area of the burner is constant, we can simplify this equation to:

rho1V1 = rho2V2

Next, we can use the conservation of momentum equation to relate the pressures at the entrance and exit of the burner:

p1 + rho1V1² = p2 + rho2V2²

Since the burner is adiabatic, we can assume that the specific enthalpy is conserved:

h1 = h2

Using the perfect gas law and the relations for specific heats, we can express the specific enthalpy in terms of temperature:

h = c_p*T

where c_p is the specific heat at constant pressure. Substituting this into the previous equation and rearranging, we have:

T2 = T1*(1 + 0.5*(gamma - 1)M1²)/(1 + 0.5(gamma - 1)*M2²)

where M1 and M2 are the Mach numbers at the entrance and exit of the burner, respectively. Finally, we can use the conservation of energy equation to relate the temperatures at the entrance and exit of the burner:

h0 = c_pT0 = c_pT*(1 + 0.5*(gamma - 1)*M²)

Substituting the previous equations into this expression and rearranging, we get:

M2 = sqrt((2/(gamma-1))((T2/T1) - 1)/(1 - (T2/T1)((gamma-1)/(gamma+1))))

Substituting the given values into this equation, we get:

M2 = 3.88

Therefore, the Mach number at the exit from the burner is approximately 3.88.

To find the stagnation pressure loss due to heating, we can use the equation for the stagnation pressure ratio:

p02/p01 = (1 + 0.5*(gamma - 1)M1²)^(gamma/(gamma-1)) / (1 + 0.5(gamma - 1)*M2²)^(gamma/(gamma-1))

p02/p01 = 0.588

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Answer:

232 N

Explanation:

By Hooke's law, the force applied to a spring is proportional to the stretch of the spring, so

F = kx

Where F is the force, k is the spring constant and x is how much it is stretched.

So, replacing k by 58N/cm and x by 4 cm, we get

F = (58 N/cm)(4 cm)

F = 232 N

Therefore, the force applied is 232 N

there will be

a)Aforce of attraction

Answer:

3 miles

Explanation:

5 + 2 - 2 - 2 = 3 miles

The smallest particle size a scientist can observe using a scanning probe microscope would be a nanometer, therefore the correct answer is option B.

A recognized and accepted standard for measuring other amounts of the same sort is referred to as a unit of measurement. It is predetermined by custom or law.

As given in the problem, we have to find out what is the smallest particle size a scientist can observe using a scanning probe microscope.

1 millimeters = 1 × 10 ⁻³ meter

1 nanometer = 1 × 10⁻⁹  meters

Thus, the smallest particle size a scientist can observe using a scanning probe microscope would be a nanometer, therefore the correct answer is option B.

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Therefore, the largest pressure is in section 1. Therefore, the answer is Section 1.

Water flows smoothly through a pipe with various circular cross-sections of diameters 2D, 6D, and D', respectively. The velocity, pressure, and volume flow rate of water in the pipe are all unknown. In this case, Bernoulli's equation can be used to determine the velocity and pressure changes that occur throughout the pipe. However, Bernoulli's equation can be used to determine the velocity and pressure changes that occur throughout the pipe. The following is the formula for Bernoulli's equation:

p1 + (1/2)ρv1² + ρgh1 = p2 + (1/2)ρv2² + ρgh2

Where:
p1 is the pressure at section 1,
ρ is the density of water,
v1 is the velocity at section 1,
g is the acceleration due to gravity,
h1 is the height at section 1,
p2 is the pressure at section 2,
v2 is the velocity at section 2, and
h2 is the height at section 2.

Let's take the velocity ratio first. Bernoulli's equation can be used to calculate the velocity in each section.

p1 + (1/2)ρv1² + ρgh1 = p2 + (1/2)ρv2² + ρgh2

p2 = p1, h1 = h2, and ρ are all constants, and thus can be canceled. Using Bernoulli's equation, we get:

(1/2)ρv1² = (1/2)ρv2² + (1/2)ρv3²

v3/v1 = (v1² - v2²)½ / (v1² - v3²)½ = (D'² - D²)½ / (D'² - 4D²)½

So, the ratio of the speed in section 3 to the speed in section 1 is (D'² - D²)½ / (D'² - 4D²)½.

Next, the pressure in each section can be determined using Bernoulli's equation. In a fluid flow system, when the speed of the fluid increases, the pressure of the fluid decreases. As a result, the pressure is the highest in section 1, and the pressure decreases as the fluid flows through sections 2 and 3.

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The coefficients in order are 2, 1, 1

A balanced equation is an equation for a chemical reaction in which the number of atoms for each element in the reaction and the total charge is the same for both the reactants and the products.

In other words, the mass and the charge are balanced on both sides of the reaction.

According to the given situation,

To balance the the chemical equation,

Step 1 - Add a 2 on the Na2HPO4:

2(Na₂HPO₄)  ⇒ Na4P₂O₇ + H₂O

Step 2 -Next take count of each element on both sides to see if the 2 is balanced or not:

On the left there are 4 Na, 2 H, 2 P, and 8 O

On the right there are 4 Na, 2 H, 2 P, and 8 O

Step 3 - Now we will divide by 2

i.e. 2 NA.H. P

The coefficient of  Na is 2 , Coefficient of H is 1 and Coefficient of P is 1

Therefore,

The coefficients in order are 2, 1, 1.

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Answer:

Lightning strikes help dissolve this unusable nitrogen in water, which then creates a natural fertilizer that plants can absorb through their roots. Lightning also produces ozone, a vital gas in our atmosphere that helps shield the planet from rays of harmful ultraviolet sunlight.

Explanation:

Answer:

WHEN LIGHTNING STRUCKS VOLCANIC SAND IT TURNS TO DIAMOND HUMANS CAN USE THESE DIAMOND'STO BARGAN

The AP Physics Equation Sheet is a resource provided by the College Board, which administers the Advanced Placement (AP) program in the United States. The AP Physics exams cover a range of topics in physics, including mechanics, electricity and magnetism, and thermodynamics, among others.

The essential equations and formulae that students could utilise on the test are included on the equation page. It is meant to aid in exam preparation and make sure that students have access to the relevant equations.

The equation sheet contains formulae for many different physical quantities, including, but not limited to, force, energy, power, velocity, acceleration, and electric charge. Formulas for specific subjects are also included, including those for Newton's equations of motion, work and energy, momentum and collisions, and electric circuits.

During the exam, students are permitted to utilise the AP Physics Equation Sheet, but it is assumed that they are already familiar with the equations and know how to use them to answer questions.

The equation sheet is not a replacement for a thorough comprehension of the fundamental ideas and tenets of physics.

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Answer:

people could just have a space heater or they are wearing warm clothes.

Explanation:

COMMON SENSE!!!!!

Answer: 4698 feet or 1432 Meters.

Explanation: