12.4• (a) What is the average density of the sun? (b) What is the av- erage density of a neutron star that has the same mass as the sun but a radius of only 20.0 km?

Q: A polariser made of Polaroid polymer has an intensity transmittance of 90 percent for light polarise...

A: The intensity of light transmitted through a polarizer is given by Malus law, I = I0* cos2(theta) Wh...

Q: A nichrome rod of length LN = 78 cm is connected in series (end to end) to a carbon rod of length LC...

A:

Q: I, A 2

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Q: Your teacher stands 20 meters from a wall and fires a dart gun which hits the wall 1 m below the hor...

A: GivenHorizontal distance between wall and teacher, x=20 mVertical displacement, y=1 m

Q: An asteroid made out of iron (7860 kg/m3) strikes the Earth in an area where the oceans are very dee...

A: Given data: The density of asteroid is ρ=7860 kg/m3. The speed of asteroid is v=30 km/s. The densit...

Q: A student has drawn a free-body diagram for a box being pulled by a string down a rough incline. The...

A: We need to see the direction of each force acting on the body and according to this we need to write...

Q: A certain strain of bacteria will divide itself from 1 to 2 every to [minute]. As a result, its popu...

A: Given: Population model The table is  Initial population No = 100   Asked: to find to in minutes

Q: In the figure below, an open tank contains a layer of oil floating on top of a layer of water of den...

A:

Q: The string of 5 meters long is clamped at the ends and is vibrating as the third harmonic. The strin...

A:

Q: Four charges are arranged in a square with sides of length 500 cm. What is the resultant force on 2q...

A:

Q: Task 2: Write one situation showing the following conditions а. Charging by rubbing b. Charging by i...

A: When a charging by rubbing process, the material become negatively charge does so because it simply ...

Q: A thin 2.66 m long copper rod in a uniform horizontal magnetic field has a mass of 42.7 g. When the ...

A:

Q: A stone is thrown at 16 m/s with an angle of 40° above the horizontal from the roof top of the build...

A:

Q: Describe the transport of energy, from the deep interior of the Sun, to when it finally reaches the ...

A:

Q: 1. Two small plastic spheres are given positive electrical charges. When they 15.0 cm are apart, the...

A:

Q: A specific aircraft needs a velocity of 42m/s to generate enough lift for takeoff. It takes 50.0s to...

A: GivenSpecific aircraft needs a velocity=42 m/sTime taken by aircraft =50.0 s

Q: The next three questions refer to the series of equipotential lines below. The electrical potential ...

A: Given The potential difference between each equipotential line is 10 V

Q: A ball is thrown horizontally from the top of a building 22m high.the ball strikes the ground at a p...

A: GivenDistance travelled by ball in in vertical direction,y=22 mHorizontal distance travelled by ball...

Q: wo rods and one cable are attached to the supports at O. If two of the forces are as shown, determin...

A: We need to find the value of force F to be applied and the angle at which it should be applied to ac...

Q: A ball is thrown horizontally from the top of a building 22m high.the ball strikes the ground at a p...

A: When ball is in the air the only acceleration acting on the ball is in the vertically downward direc...

Q: -In an experiment to verify newton's second law of motion using the atwood machine, a student obtain...

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Q: Introduction of capacitors

A:

Q: of oxygen (O2) contained in BIFs is equivalent to 6.6% of the oxygen present in the modern atmospher...

A: Find mass of oxygen in atmosphere. 

Q: A flat square with sides 18 cm is placed in a uniform electric field of magnitude 5784 N/C. What is ...

A:

Q: rigure r3.11 Problems 11 and 22. Three displacements are A 200 m due south, B = 250 m due west, and ...

A:

Q: Suppose the starter cable of a car is carrying 160 A of current. Assume this cable is long and strai...

A:

Q: Please help! At noon, ship A is 150 km west of ship B. Ship A is sailing east at 35 km/h and ship B ...

A: GivenDistance Between Ship A and Ship B=150 kmVelocity of ship A=35 km/hVelocity of Ship B=30 km/h 

Q: A projectile is shot from the edge of a building as shown. How high above the building does it go do...

A:

Q: The motorcycle is traveling at a speed of 1.3 m/s when it is at A. is the speed is then increased at...

A:

Q: What is the difference between the size of the images created with a convex vs. a concave mirror?

A: Convex Mirror The inner surface is polished and the outer surface is reflective It is also called d...

Q: What is the force of tension in a rope that spins a 250g object in a vertical circle with a radius o...

A:

Q: A car is initially traveling at 50.0 km/h. The brakes are applied and the car stops over a distance ...

A:

Q: An object with a net charge of 24 µC is placed in a uniform electric field of 610 N/C directed verti...

A:

Q: Convert 100 kg to cm -d

A: Given value and unit is, 100 kgcm3-d

Q: A caravan of mass 600 kg is towed by a car of mass 900 kg along a straight horizontal road. The towb...

A:

Q: The sum of vectors D, E and F is a resultant with a magnitude of 24.80 cm pointing 21.34o west of no...

A: Solution:-

Q: Show that the wavelength of a photon, measured in angstroms, can be found from its energy, measured ...

A:

Q: 3. A vector has an x component of 225.0 units and a y component of 40.0 units. Find the magnitude an...

A:

Q: average speed of 60 kph East for 1 hr and then continue 80 kph North for 1.5 hrs. (a) What is your ...

A: Average speed.

Q: A segment of wire carries a current of 20 A along the x axis from x = −6 m to x = 0 and then along t...

A:

Q: 4. (a) The masses of the Earth and the Moon are 5.98 x 1024 kg and 7.35 × 1022 kg, respectively, and...

A:

Q: An object is moving along a straight line in the positive x direction. The graph shows its position ...

A:

Q: A refrigerator door is opened and room-temperature air (20°C) fills the 1.50 m 3 compartment. A 10.0...

A: In this problem we have to Calculate how much heat will be removed by the refrigerator. For this we ...

Q: A 1.50-kg book is sliding along a rough horizontal surface. At point A it is moving at 3.21 m/s, and...

A:

Q: Calculate the fraction of non-reflected light that is transmitted through a 106-mm thickness of glas...

A: Given value--- absorption coefficient = 0.0002. sample thickness = 106 mm. We have to find--- Cal...

Q: A pendulum of length L = 0.61m and mass 4.8Kg has a spring of force constant k =610 N/m connected to...

A:

Q: A flat horizontal plate of area 400 cm² is dragged over a O.20 cm thick layer of oil at a speed of 3...

A:

Q: As part of a college physics lab. A car that is giving off a sound with a frequency of 350 Hz, is mo...

A:

Q: A ball is thrown upward in the air with an initial velocity of 40 m/s. How long does it take to reac...

A:

Q: Suppose that the block now moves across the surface with constant speed under the action of a horizo...

A: Given: The applied force is 3 N. The speed of the object is constant.

Density of Solids

The density of a substance refers to how much matter is present in a given amount of space. It is expressed as the ratio of the mass of the substance to its volume.