1. Is smoke an example of matter? Does it have mas and occupy space? 2. Are toys and leaves examples of matter? Do they occupy spance and have mass?

Q: A capacitor of capacitance 5 μF is connected to a 6 V supply. What charge is stored in the capacitor...

A: Given  Capacitance C=5μF Voltage V=6V  

Q: Two crewmen pull a raft through a lock, as shown in the figure below. One crewman pulls with a force...

A: Given: F1=129 Nθ1=34.7°θ2=46.6° The free-body diagram is given below.  

Q: What helps prevent electric shock? Group of answer choices a)winter clothes b)two-prong plug c)wet ...

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Q: The relation a = -k/x is defined as the particle's acceleration. It is determined through experiment...

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Q: a (m/sec?) n = 0 8 m/s 4 m/s t (sec) 2

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Q: A metal sphere with radius ra = 1.20 cm is supported on an insulating stand at the center of a hollo...

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Q: Question 3 refers to a horizontal massless rope attached to a 23.0 kg box on a horizontal surface as...

A: Given data:  A box on a horizontal surface  Mass (m) = 23.0 kg Coefficient of static friction (μs) =...

Q: Part A Determine the magnitudes of the currents through R1 and R2 in (Figure 1), assuming that each ...

A: Given  Each battery have internal resistance of 3.0 ohm .

Q: Two children stretch a jump rope between them and send wave pulses back and forth on it. The rope is...

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Q: III. Refer to the force system given below: a. Which of the following most nearly gives the magnitud...

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Q: Vt = 120V R6 22 RI Z 102 R4 R2 102 122 R5 R3 ww

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Q: An electromagnetic wave is: a bit of radiation that could cause health problems. all light that is n...

A: The answer is below

Q: Part A What is the potential difference AVy in the figure(Figure 1) if V12 = 35V, V23 = 50V and V41 ...

A: Given  ∆V12 = 35 V  ∆V23 = 50 V  ∆V41 = -65 V  ∆V34 =?????

Q: -800 Dimensions in mm F1 600 F2 F3 900 k-560te-480–4 What is the y component of F2=495 N?

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Q: A marksman points a rifle from the standing position at a tin can 1 km away. It is located at the sa...

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Q: blue train leaves Central station travelling east at 15 miles per hour. Four hours later, a yellow t...

A: A blue train leaves Central station travelling east at 15 miles per hour. yellow train leaves Centra...

Q: When a glass rod is rubbed with silk, it becomes positive and the silk becomes negative- yet both at...

A: When a glass rod is rubbed with silk, it becomes positive and the silk becomes negative because the ...

Q: The body of a snorkeler swimming in salt water has a resistance of about 585 2. If the snorkeler is ...

A: Given data:  Voltage (V) = 5.00×102 V Resistance (R) = 585 Ω Required: Current (I) and Power (P)

Q: Describe the image created by a convex lens when the object is located between the focal point F and...

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Q: Problem: Given the a-t diagram, plot the V-t and S-t diagram. At t=0; V=0; S=0

A: Given a(t) = 4           for 0≤t≤2mt+n for 2≤t≤4 Here we write down a linear equation for second par...

Q: Describe charging by conduction and induction using the given diagram below

A: Most objects are electrically neutral i.e they have an equal number of positive and negative charges...

Q: 26. Choose any that apply. Most objects that are heated have a: lower volume higher volume lowe...

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Q: If the length of second pendulum is increased by 21%. How many oscillations it will lose per day (B)...

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Q: Which of the following cases (if any) requires the GREATEST amount of heat? In each case, the materi...

A: Given data:  For a meterial  Mass and rise in temperature is given  Needed:  Which required the grea...

Q: (equal magnitude) A D E This car is going through a "loop-the-loop" at constant speed. Assume suffic...

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Q: 6. A potential difference of 9 V is maintained across a conductor in a circuit. If the conductor has...

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Q: A student drops an object from rest above a force plate that records information about the force exe...

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Q: pumpkin is shot straight up with an initial speed of 5.9 m/s. What is the maximum height it can reac...

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Q: If the position of a particle is defined by [2 sin (7/5)t + 4] m, wheret is in seconds, construct th...

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Q: Three equal charges (Q1, Q2, & Q3) of +5x10^-6 C (Micro-Coulomb) form the vertices of a triangle tha...

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Q: 4.3 (a) A canoeist (person) of mass m, sits at rest at the back end of a canoe. The canoe has a leng...

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Q: 32)A spring stretches by 2cm when a load of 20N is suspended from it. What load should be suspended ...

A: Data Given ,   load in 1st case ( F1 ) = 20 N strech in 1st case ( x1 ) = 2 cm   stretch in 2nd case...

Q: What are the workings of a selenium photocopier?

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Q: The acceleration due to gravity in the surface of jupiter is 254 percent tines that on earth . an ob...

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Q: 1. Given: Vector D, with horizontal and vertical components: 20 in and 30 in, respectively. Vector D...

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Q: A typical sneeze expels material at a maximum speed of 44.9 m/s. Suppose the material begins inside ...

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Q: Rossby

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Q: The primary organs of the respiratory system are the _____, which carry out this ecchange of gases a...

A: According to the question we have to fill the blanks.

Q: 2. Why does a car always attract dust right after it is polished? ( Note that the car wax and car ti...

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Q: SOlVE THE FOtio WING PROB LEMS: 2) A STEEL BAII DROPpED FROM A TOWER STRIKES THE GROUND in 3 See FIH...

A: Part (2): Given: The initial velocity of the ball is 0 m/s. The time taken by the ball to reach the ...

Q: A 7.0-kg spherical shell at rest explodes into two fragments, one with a mass of 2.0 kg and the othe...

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Q: Activity 2 - Law of Charges Describe what charge is on each object and the law of electric charge is...

A: The electric force for charges at rest, according to Coulomb, has the following properties: Charges ...

Q: Force (N) 3 2 1. Time (s) 5 6 7! 8 -1 -2 -3 -4 -5- An object is initially at rest. A varying force i...

A: Given data:  Force vs time graph Object initial at rest. Required: The momentum of the object at tim...

Q: Figure P6.59 shows a Ferris wheel that rotates four times each minute and has a diameter of 18.0 m. ...

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Q: show solution

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Q: 34. The protein dynein powers the flagella that propel some unicellular organisms. Biophysicists hav...

A:   Given Max force  F                         = 1pN     = 10-12 N Amplitude of oscillation A = 15 nm ...

Q: The relation a = -k/x is defined as the particle's acceleration. It is determined through experiment...

A: The acceleration of the particle is given by a=-k/x. When the particle's velocity v=15 ft/s the dist...

Q: The motion of a particle starting from rest is governed by the a -t curve shown> Sketch the v-t and ...

A: In this question we have to sketch a graph and determine the displacement at t=9 s. Please give posi...

Q: Part A A 3.00-µF and a 4.00-µF capacitor are connected in series, and this combination is connected ...

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Q: A solid ball is rotated by applying a force of 4.9 N tangentially to it. The ball has a radius of 14...

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Stellar evolution

We may see thousands of stars in the dark sky. Our universe consists of billions of stars. Stars may appear tiny to us but they are huge balls of gasses. Sun is a star of average size. Some stars are even a thousand times larger than the sun. The stars do not exist forever they have a certain lifetime. The life span of the sun is about 10 billion years. The star undergoes various changes during its lifetime, this process is called stellar evolution. The structure of the sun-like star is shown below.

Red Shift

It is an astronomical phenomenon. In this phenomenon, increase in wavelength with corresponding decrease in photon energy and frequency of radiation of light. It is the displacement of spectrum of any kind of astronomical object to the longer wavelengths (red) side.