suppose 29.0 g of ice at -10.0c is placed into 300.0 g of water in a 200.0-g copper calorimeter. the final temperature of the water and copper calorimeter is 18.0c.

Answer:

e. 400 Hz

Explanation:

In closed organ pipe,  only odd harmonics of fundamental note is possible .

The fundamental frequency is 200 Hz . Then other overtones will be having following frequencies .

200 x 3 , 200 x 5 , 200 x 7 , 200 x 9 etc

600 Hz , 1000 Hz , 1400 Hz  , 1800 Hz .

Frequency not possible is 400 Hz .

The orbital speed of an ice cube in the rings of Saturn is 11.2 Km/s. The correct answer is option C

The speed of an object travelling around a circle depends on two quantities namely;

Given that  an ice cube in the rings of Saturn. The mass of Saturn is 5.68 x 10^26 kg, and use an orbital radius of 3.00 x 105 km. (G= 6.67 × 10-11 N·m2/kg2)

The given parameters are:

Let us first calculate the gravitational field strength on the Saturn.

g = GM/r²

Substitute all the necessary parameters and convert km to m

g = (6.67 × \(10^{-11}\) × 5.68 × \(10^{26}\)) ÷ (300000 × 1000)²

g = 3.79 × \(10^{16}\) ÷ 9 × \(10^{16}\)

g = 0.421 m/s²

The  orbital speed will be

V² = gr

V² = 0.4211 × 300000 × 1000

V² = 126333333.3

V = √126333333.3

V = 11239.8 m/s

Convert it to Km/s by dividing the answer by 1000

V = 11239.8/1000

V = 11.2 Km/s

Therefore, the orbital speed of an ice cube in the rings of Saturn is 11.2 Km/s

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(1) When the driver is at rest, the restoring force exerted by spring is equal in magnitude to the driver's weight, so that

∑ F = s - mg = 0   ==>   s = mg = 617.4 N

If the spring is compressed 0.015 m, then the spring constant k is such that

617.4 N = k (0.015 m)   ==>   k = 41,160 N/m ≈ 41 kN/m

(2) The total mass of the passengers is

24 (68 kg) + 3 (15 kg) + 5 (3 kg) + 25 kg = 1717 kg

so that if everyone is at rest, the spring is compressed a distance x such that

kx = (1717 kg) g   ==>   x ≈ 0.41 m

Answer:

yes the answer is D as the two people if we calculate

Answer:

A

Explanation:

correct on A P E X

Answer:

\(500\text{N} (490\text{N}) (490.5\text{N})\)

Explanation:

The reaction force is the force that is in the perpendicular direction to the wall.

We have an angle and a hypotenuse, we need to find the adjacent angle - so we can just use cos:

\(cos(\theta)=\frac{\text{adj}}{\text{hyp}}\\\text{hyp}*cos(\theta)=\text{adj}\\100*cos(60)=100*0.5=50\text{kg}\)

However, we would like a force and not a mass.

\(W=mg\\W=50g\\W=500\text{N} (490\text{N}) (490.5\text{N})\)

Answer 1 if you use g as 10, answer 2 if you're studying mechanics in maths, answer 3 if you're studying mechanics in physics.

Complete Question

A 10 kg medicine ball is thrown at a velocity of 15 km/hr ( m/s) to a 50 kg skater who is at rest on the ice. The skater catches the ball and subsequently slides with the ball across the  ice.

Calculate the kinetic energy after collision(in joules).

Answer:

 \(K.E=70.23J\)

Explanation:

From the question we are told that:

Mass of ball \(m_b=10kg\)

Speed \(V_{b1}=15 km/hr ( m/s)\)

            \(V_{b1} = 4.1667 m/s\)

            \(V_{b1} = 4.1667 m/s\)

Mass of Skater \(m_s=50kg\)

Generally the equation for conservation of momentum is mathematically given by

  \(m_sV_{s1}+m_bV_{b1}=(m_s+m_b)V\)

  \(V=\frac{m_sV_{s1}+m_bV_{b1}}{(m_s+m_b)}\)

  \(V=\frac {50+10*4.1667}{(50+10)}\)

  \(V=1.53m/s\)

Generally the equation for  Kinetic energy is mathematically given by

 \(K.E=\frac{1}{2}(m_s+m_b)V^2\)

 \(K.E=\frac{1}{2}(50+10)(1.53)^2\)

 \(K.E=70.23J\)

Therefore kinetic energy K.E after collision is given as

 \(K.E=70.23J\)

The speed of the wave from the calculation that we have done is 14 m/s

To find the wave speed, we need to know the frequency and wavelength of the wave. These values can be measured experimentally or calculated based on the properties of the medium through which the wave is traveling.

For example, the wavelength of a sound wave can be determined by measuring the distance between two consecutive points of maximum compression or rarefaction, while the frequency can be measured using a frequency meter or calculated based on the properties of the sound source.

We know that;

Frequency = 7 cycles/s

Wavelength = 2 m

Wave speed = λf

= 7 cycles/s * 2 m

= 14 m/s

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The difference between transverse and longitudinal waves is direction of wave motion in relative to direction of the particle motion.

The particle motion in a transverse wave is only perpendicular to the wave motion but in longitudinal wave, the particle motion is parallel to the wave motion.

An example of transverse wave is a wave on a guitar string which when plucked, it vibrates back and forth in a direction perpendicular to the direction of the wave traveling along the string.

An example of a longitudinal wave is sound waves which are created when a source like speaker or a musical instrument vibrates back and forth in the same direction as the wave is traveling through the air.

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Answer: 300 m/s

Explanation:

The equation for finding wave speed is the wavelength times the frequency which would be

12.0mx 25hz=300m/s

Answer:

Because when you move a object the energy stored in moving objects. As the object moves faster, more energy is stored. Motion energy is the sum of potential and kinetic energy in an object that is used to do work.

Explanation:

answer it please

What is the Central Idea of "Shelter Dog Protects Owner with Epilepsy“

What is the author’s viewpoint?

Do you agree or disagree with that viewpoint?

Why? Explain your answer.

parpgraph 1-2

Answer:

Yes, the energy used to lift the book was stored in the book as potential energy. The book moved when it was let go.

Explanation:

This is what edmentum sample answer says so I hope this helps out!

Answer: you have to divide and multiple fam

Explanation:

The temperature gradient in the flow of direction is 294525 W.

A temperature gradient is the gradual variance in temperature with distance. The slope of the gradient is consistent within a material. A gradient is established anytime two materials at different temperatures are in physical contact with each other.

Q= T/( L/ KA)

Q= ( 1500 − 450) / 0.15 / 9.35v * 4.35)

   = 294525 W

Units of measure of temperature gradients are degrees per unit distance, such as °F per inch or °C per meter.

Many temperature gradients exist naturally, while others are created. The largest temperature gradient on Earth is the Earth itself. Q= T/Ka.

Therefore, The temperature gradient in the flow of direction is 294525 W.

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The initial speed of the van of mass 2713 kg is 9.04 m/s.

Speed is the ratio of distance to time.

To calculate the initial speed of the van, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the initial speed of the van is 9.04 m/s.

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The length of the stack shortens by 4.88 x 10-6 m.

Brass and steel have Young's modules of 1.0 and 2 respectively, 1010N/m2. Under the same force, a brass wire of the same length and a steel wire with radii of RB and RS, respectively, are both expanded by 1 mm.

The change in length of each cylinder due to the compressive force can be found using the formula:

ΔL = (F * L) / (A * E)

First, let's find the cross-sectional area of each cylinder:

A = π * r² = π * (0.32 cm)² = 0.3217 cm²

L = Lcopper + Lbrass

L = 2 * Lcopper

Ftotal = Fbrass + (-Fcopper) = Fbrass - Fbrass = 0

Since the total force on the stack is zero, the amount by which the length of the stack decreases is the same as the amount by which the length of the brass cylinder decreases:

ΔL = (Fbrass * Lbrass) / (Abrass * Ebrass)

ΔL = (5000 N * Lbrass) / (0.3217 cm²* 9.0 x 10¹⁰ N/m²)

ΔL = (1.554 x 10⁻⁴ m/N) * Lbrass

V = π * r² * Lbrass

Lbrass = V / (π * r²)

Lbrass = 1 cm / (π * (0.32 cm)^2)

Lbrass = 3.14 cm

Finally, we can substitute this value into the equation for ΔL:

ΔL = (1.554 x 10⁻⁴ m/N) * 3.14 cm

ΔL = 4.88 x 10⁻⁶ m

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If the half-life of an isotope is found to be 6 days, then the isotope whose initial weight is 95 and the final weight is 5.9. It would take approximately 24 days.

Isotope may be defined as the type of atom in which the number of neutrons differs and the number of protons is the same. They are atoms of the same element, having the same atomic number but different mass numbers.

According to the context of this question,

The initial weight of an isotope = 95

The final weight of an isotope = 5.9

The half-life = 6 days

After 6 days, the weight of 95 reduced to 47.5.

After 6 days, the weight of 47.5 was reduced to 23.75.

After 6 days, the weight of 23.75 reduced to 11.87

After 6 days, the weight of 11.87 was reduced to 5.93.

Therefore, if the half-life of an isotope is found to be 6 days, then the isotope whose initial weight is 95 and the final weight is 5.9. It would take approximately 24 days.

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Your question is incomplete, but most probably your full question is as follows:

An isotope A has an initial weight of 95g, but after some time its weight was reduced to 5.9g being a half-life of 6 days. On what day it was measured?

The pathogen that immunization helps to prevent is virus.

To reduce the risk of atherosclerosis cut down on saturated fatty foods.

Immunization is defined as the prevention of pathogenic viral organisms from harming a living human host through the exposure of the host to an attenuated form of the virus to develop immunity prior to a future exposure.

Atherosclerosis is the deposition of fatty substances on the arterial wall leading to blocking of the blood vessels.

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Answer:

495.5 Joules

Explanation:

Given data

Mass= 10kg

Height= 5meters

g= 9.81m/s^2

Yes the rock will possess potential energy before it hits the ground

The potential energy is expressed as

PE=mgh

substitute

PE= 10*9.91*5

PE= 495.5 Joules

Answer:

c

Explanation:

im smart....................... i think

This law is about inertia, and the law displayed in A is Newton's third law of equal and opposite reactions, so option A is correct.

The basis of classical mechanics is laid out in three assertions known as Newton's laws of motion, which were first articulated by English physicist and mathematician Isaac Newton. These laws describe the relationships between forces acting on a body and its motion.

Unless a force acts on a body that is at rest or moving in a straight line at a constant speed, Newton's first law asserts that it will continue to be at rest or move in that direction.

This law is about inertia (an object wanting to stay in its state of motion) and the law displayed in A is Newton's third law of equal and opposite reactions, therefore, it is not an example of  Newton’s first law of motion.

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Answer: 529.9 Hz

Explanation:

Here we need to use the Doppler equation, so we have:

f' = f*(v + v0)/(v - vs)

Here, f is the frequency = 500Hz

v is the velocity of the wave, = 334m/s

v0 is the velocity of the observer = 20m/s

vs is the velocity of the source = 0m/s

Then we have:

f' = 500Hz*(334m/s + 20m/s)/(334m/s) = 529.9 Hz

1. The maximum height above its launch level is 1.45 m

2. The time of flight of the ball is 1.1 s

1. How do I determine the maximum height?

From the question given above, the following data were obtained:

The maximum height can be obatianed as follow:

H = u²Sine²θ / 2g

H = [5.5² × (Sine 76)²] / (2 × 9.8)

Maximum height = 1.45 m

How do I determine the time of flight?

The time of flight of the ball can be obtained as follow:

T = 2uSineθ / g

T = [2 × 5.5 × Sine 76] / 9.8

Time of flight = 1.1 s

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If the fundamental frequency of the harmonic is 7 Hz, the frequency at which it is created depends on the harmonic being referred to.

Frequency of harmonics

If the fundamental frequency of a harmonic is 7 Hz, then the frequency at which the harmonic is created depends on the harmonic series being used.

The frequency of the nth harmonic in a harmonic series is equal to n times the fundamental frequency. Therefore, the first five harmonics of a harmonic series with a fundamental frequency of 7 Hz would be:

First harmonic (fundamental): 7 Hz

Second harmonic: 2 x 7 Hz = 14 Hz

Third harmonic: 3 x 7 Hz = 21 Hz

Fourth harmonic: 4 x 7 Hz = 28 Hz

Fifth harmonic: 5 x 7 Hz = 35 Hz

So, the frequency at which the harmonic with a fundamental frequency of 7 Hz is created depends on which harmonic is being referred to.

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Answer: 12,339

Explanation:

Answer:

The mass of the Planet X is 9.595 x 10²⁴ kg.

Explanation:

mass of the object, m = 0.5 kg

radius of the Planet X, r = 4 x 10⁶ m

weight of the object, W = F = 20 N

let the mass of the Planet  X = mₓ

Apply Newton's gravitational law;

\(F = \frac{Gmm_x}{r^2} \\\\m_x = \frac{Fr^2}{Gm} \\\\m_x = \frac{(20)(4\times 10^6)^2}{6.67 \times 10^{-11} \ \times \ 0.5} \\\\m_x = 9.595 \times 10^{24} \ kg\)

Therefore, the mass of the Planet X is 9.595 x 10²⁴ kg.

Answer:

A) E = 2550 J

B) K = 1325 J

C) t = 5,05 s

Explanation:

A) The total mechanical energy is given by the sum of the gravitational potential energy and the kinetic energy of the body:

\(E=U+K=mgh+\frac{1}{2}mv^2\)  (1)

m: mass of the body = 2,0 kg

g: gravitational acceleration = 9,8 m/s^2

h: height = 125 m

v: initial velocity of the body = 10 m/s

You replace the values of all variables h, m, g and v in the equation (1):

\(E=(2,0kg)(9,8m/s^2)(125m)+\frac{1}{2}(2,0kg)(10m/s)^2=2550\ J\)

the total mechanical energy is 2550 J

B) The kinetic  energy of the corp, when it is at a height of h/2 is given by:

\(K=\frac{1}{2}mv^2\)

where

\(v=\sqrt{(v_x)^2+(v_y)^2}\)

The x component of the velocity is constant in the complete trajectory, which is the initial velocity, that is, vo = vx

The y component is given by:

\(v_y^2=v_{oy}^2+2gy\)

voy: vertical initial velocity = 0m/s

y: height = h/2 = 125/2 = 62.5 m

\(v_y=\sqrt{2g\frac{h}{2}}=\sqrt{2(9.8m/s^2)(62.5m)}=35m/s\)

Then, you can calculate the velocity of the body and next, you can calculate the kinetic energy:

\(v=\sqrt{(10m/s)^2+(35m/s)^2}=36,40\frac{m}{s}\\\\K=\frac{1}{2}(2,0kg)(36,40m/s)^2=1325\ J\)

C) The time that body takes in all its trajectory is:

\(t=\sqrt{\frac{2h}{g}}=\sqrt{\frac{2(125m)}{9,8m/s^2}}=5,05s\)

Answer:

Static friction is greater than kinetic friction, but they both act opposite the applied force.

Explanation:

Newton's 3rd law states that every action has and equal but opposite reaction.

If an object has static friction, that means it stays in one spot, and it takes a great amount of force to get it moving.

Once the object is moving it has kinetic friction, but it's easier to keep it moving unless you are trying to stop it.

The equal but opposite reaction to something moving it is stopping it, and the equal but opposite reaction to stopping something is moving it.

The same amount of force used to move/stop something is used to stop/move it.

Static friction is greater than kinetic friction, but they both act opposite the applied force.

Friction is the force that opposes motion. Frictional force always acts in opposition to the direction of motion.

There are two kinds of friction;

Since more forces tend to act on a body at rest and prevent it from getting into motion than the forces that tend to stop an already moving body, it follows that static friction is greater than kinetic friction. Both act in opposite direction to the applied force.

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Option D. This action cause the skateboarders motion to change because it increases the force of friction so she slows down.

This is the force that opposes motion or cause a moving object to stop or slow down.

Ff = μmg

where;

Ff is frictional force

The frictional force between the skateboard and the hill increases with increase in weight of the skateboard.

As the skateboarder applies the force on one edge of the skateboard, the applied to the skateboard increases which in turn increases the frictional force between the skateboard and the hill, reducing the speed of the skateboarder.

Thus, this action cause the skateboarders motion to change because it increases the force of friction so she slows down.

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Answer:

F equals 3 N and the object remains stationary. (second option in the list)

Explanation:

For sure to cancel acting forces, F must be 3N pointing up. But with regards to the object stationary or not, the question is tricky. We could have a ZERO net force applied, and the object moving at constant speed, which could still verify Newton's Laws. But considering the first answer option that refers to vertical motion upward where the object could be gaining potential energy, the most accurate response is that the force F has to be 3 N pointing up to make the object in equilibrium, and no motion in the vertical axis.

Answer: F equals 3 N and the object remains stationary.

Explanation: