A star with apparent magnitude 5 is brighter than a star with apparent magnitude 15 by how much? A star with absolute magnitude -2 is more luminous than a star with absolute magnitude 8 by how much?

Q: In a technological or engineering application, you have a voltage signal that is given by the equati...

A:

Q: Consider the following vectors: A   =  1.2i + 4.9j + 3.7k   B   =  -8.5i + 7.5j + 8.3k Part (a)  W...

A:

Q: An ideal spring of negligible mass with force constant of 400 N/m is placed on a frictionless horizo...

A:

Q: Find the current in a long straight wire that would produce a magnetic field twice the strength of t...

A:

Q: A solenoid with an inductance of 14 mH is charged up from an initial current of 3.0 A to a current o...

A: Inductance of the solenoid L=14 mH=14*10-3H, it is charged up from current I1=3 A to I2=7 A in a tim...

Q: A current of 1-7 A flows through a conductor for 2.2 s. What amount of charge passes through the con...

A: Given data :     Time  =  t     Current  =  i       To find :         Charge 

Q: For R1=49, R2=40, R3=57, R4=43, R5=49, R6=18, R7=57 , R8=68 , R9=64 , R10=42 and 1=0.03 A in the cir...

A:

Q: A hydroelectric power facility converts the gravitational potential energy of water behind a dam to ...

A:

Q: What is the wavelength, in meters, of an earthquake that shakes you with a frequency of14.3 Hz and g...

A:

Q: A small car with mass 1200 kg moving forward at kg moving forward at (i) What is the post-collision ...

A: Given data:  Mass of car (m1) = 1200 kg Initial velocity of car (u1) = 16.0 m/s Mass of van (m2) = 1...

Q: rrent Attempt in Pro Doforto Multiole Co ir

A: Givenρ=725 kg/m3r=0.0539 mL=3.4 mm=89 kg

Q: MY DETAILS A particle moves in the xy plane (see the figure below) from the origin to a point having...

A: Given: F→=-5y2i^-4xj^

Q: The velocity of a particle which moves along the x axis is given by v = 2 – 4t + 5 tā, where t is in...

A:

Q: 12–11. A particle travels along a straight-line path such that in 4 s it moves from an initial posit...

A:

Q: How much energy is required to change a 50-g ice cube from ice at−15°C to steam at 140°C?

A:

Q: (1a). Black body has emissivity value of 1, but in reality, the emissivity of real objects is less t...

A:

Q: The resistance of a thin silver wire is 1.0 32 at 0°C. The wire is placed in a liquid bath and its r...

A: Resistance is a measure of the opposition to current flow in an electrical circuit. Here,we calculat...

Q: A magnetic needle of magnetic moment 6.7 x 10-2 Am2 and moment of inertia 7.5 x 10-6 kg m2 is perfor...

A:

Q: An infinitely long line charge having a uniform charge per unit length 7.5C/m lies a distance 3.0m f...

A:

Q: A challenge gaining prominence throughout the planet is the increased need for "green" or sustainabl...

A:

Q: The magnetic field shown in the figure below has a uniform magnitude of 25.5 mT directed into the pa...

A:

Q: A glass tube of radius 0.4 mm is dipped vertically m water. Find upto what height the water will ris...

A: Length can be defined as a measurement of the physical quantity of distance.  Here, we calculate the...

Q: The force if the velocity is along the +x-axis and the magnetic field is along the +y-axis 6. Using ...

A: Magnetic field experience by a moving charged particle in a magnetic field is, F = qv→×B→ also accor...

Q: A snowboarder with a mass of 98kg is initially stationary on a hilltop, then slides down on the snow...

A:

Q: Gas is confined in a tank at a pressure of 12.8 atm and a temperature of 22.5°C. If two-thirds of th...

A:

Q: Two uniform solid spheres have the same mass of 2.85 kg, but one has a radius of 0.236 m while the o...

A:

Q: Convert 264.25 K to °C, with 2 decimal places.

A: Given T=264.25 K

Q: Calculate the rotational inertia of a meter stick, with mass 0.67 kg, about an axis perpendicular to...

A:

Q: One of the most efficient engines ever built is a coal-fired steam turbine engine in the Ohio River ...

A: initial temperature T = 1870 oC = 1870 + 273 = 2143 Kfinal temperature T ' = 430 oC = 430 + 273 = 70...

Q: What mass of water at 30.0°C must be allowed to come to thermal equilibrium with a 1.80-kg cube of a...

A:

Q: A glass tube of radius 0.4 mm is dipped vertically in water. Find upto what height the water will ri...

A:

Q: A javelin thrower standing at rest holds the center of the javelin behind her head, then accelerates...

A:

Q: If f is the focal length of a convex lens and an object is placed at a distance p from the lens, the...

A: We will first evaluate p in tes of q and f and then will differentiate p with respect to q to calcul...

Q: A particular spring does not obey Hooke’s law (F(x) = - k x), but rather is described by F(x) = - k...

A:

Q: The center of a moon of mass m is a distance D from the center of a planet of mass M. At some distan...

A:

Q: The force required to compress a non-standard spring as a function of displacement is given by the e...

A:

Q: wun a speed of 9.8 second. A stone of mass 0.4 kg is thrown vertically up ms-. Find the potential en...

A: Write the given values with the suitable variables. m=0.4 kgu=9.8 m/st=0.5 s Here, m is the mass, u ...

Q: Use the following values to calculate current density (electrical current/area) in units of A/m?. Ex...

A: Given value--- Current = 3.117 mA. diameter = 3.28 mm. We have to find --- Current density?

Q: An object attached to a spring vibrates with simple harmonic motion as described by the figure below...

A: a) The Amplitude of the wave motion is define as the maximum displacement of the wave from it origin...

Q: 2. An incline of the dimensions shown rests on the ground. Two boxes of equal mass are attached by a...

A:

Q: When a skier skis down a hill, the normal force exerted on the skier by the hill is  A. zero B. equ...

A:

Q: Two oppositely charged metal spheres are brought toward each other. Which graph best represents the ...

A: Given data:  Two oppositely charged metal spheres Required: The relationship between magnitude of th...

Q: circuit has one 123 Ohm resistor, one 145 Ohm resistor, and one 234 Ohm resistor, all in series. Wha...

A: Given Three resistors say : R1 = 123 ohm  R2 = 145 ohm  R3 = 234 ohm  To Find : Equivalent resistanc...

Q: *12–12. Traveling with an initial speed of 70 km/h, a car accelerates at 6000 km/h² along a straight...

A:

Q: If a 2i + 9j - k and b-3i - 6j + 22k, what is the magnitude of vector a?

A:

Q: A point charge with charge Q1=5.4 muC is held stationary at the origin. A second point charge with c...

A:

Q: Two coils connected as shown in the figure separately have inductances L1 = 34 mH and L2 = 50 mH. Th...

A:

Q: A block having a mass of 50kg is subjected to a horizontal force applied 0.5m. above the horizontal ...

A:

Q: You are given a number of 38 Q resistors, each capable of dissipating only 4.4 W without being destr...

A: Given. resistor having resistant, R = 38 Ω Power dissipated across the resistor, P = 4.4 W power dis...

Q: A magnetic needle of magnetic moment 6.7 x 10-2 Am2 and moment of inertia 7.5 x 10 6 kg m² is perfor...

A:

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.