What is the density (in vehicles/km/lane) if I have a 2 lane road, with a total of 60 vehicles, and the road length is 500m (1/2 km)? 60 vehicles/km/lane 120 vehicles/km/lane 90 vehicles/km/lane 30 vehicles/km/lane

Q: The area of a small table is 593 cm2. Express this area in the S.I. unit. O a. 0.0593 square meter O…

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Q: Average-sized cells in the human body are about 10 micro m in diameter. How many cell are in the…

A: Given data The diameter of the cells is: d = 10 micro m = 10 x 10-6 m = 10-5 m The height of the…

Q: The average depth of the oceans is about 3.63 km, and oceans cover about 70% of Earth’s surface.…

A: We know, The circumference(P) of a sphere of radius R, is P = 2πR The surface area (A) of a sphere…

Q: One cubic centimeter (10 cm3) of water has a mass of 1.0 x 10-3 kg. (a) Determine the mass of 1.0 m3…

A: Given that:For Volume V=1 cm3 or 10-6 m3, mass of water  m=1.0×10-3 kgBiological substances are 98%…

Q: What is the density of a 7 kg solid cylinder that is 10 cm tall with radius 5 cm.

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Q: A cubic shape object has mass 50 gm and side 20 mm. Find its density in Kg/m3. 6250 1250 5000 10000

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Q: From a boat at sea, the angle of elevation of the top of the cliff is measured at 12 mils. If the…

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Q: 100 km/h velocity vector is drawn to scale and is 2 cm in length. If drawn to the same scale, a 50…

A: vector is represented as arrow. Length of the arrow represent the magnitude where as direction given…

Q: We have a very large sheet of extremely thin paper. Assume that the paper is in fact only 0.1mm…

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Q: A king size bed is generally measured to be 12 feet wide and 10 feet long in size. How long is it in…

A: The fundamental unit for measuring length is the meter. Conversion of unit of the length is given…

Q: Estimate the order of magnitude of the length, in meters, of each of the following…

A: Pool cues average length is 150 cm or 1.5 m.  It is expressed as . Hence, order of magnitude is 0.…

Q: On planet Z, the standard unit of length is the foose. Ann the Astronaut is 5.2 feet tall on Earth.…

A: Given Height of Ann on Earth is HAnn, earth=5.2 ft Height of Ann on planet Z is HAnn, Z=88 foosi…

Q: The number of square centimeters in 4.00 square meters is O 1) 4000 O 2) 400 O 3) 40 O 4) 40000

A: Given  4 m2

Q: An American football field, including end zones, is 360 feet long and 160 feet wide. What is its…

A: In one feet there are 0.3048 meter. Area is product of length and width. A=l×w

Q: The area of a square field is 24,200 sq. m. How long will a lady take to cross the field diagonally…

A: Given: The area of the square field is 24200 m2. The speed of the lady is 6.6 km/h.

Q: A physics student measures the depth of a deep hole by dropping a rock into the hole. The rock takes…

A: Vertical distance travelled by the rock is the height of the hole h=ut+12gt2h=12gt2…

Q: One cubic meter (1.00 m3) of aluminum has a mass of 2.70 x 103 kg, and the same volume of iron has a…

A: Details Given: Mass of Aluminum = 2.70*103kg Volume of Aluminum = 1.00m3 Mass of iron = 7.86*103kg…

Q: Given that density is 19.5 g/cm3 and mcritical is 60.0 kg, find the radius of the sphere where the…

A: mass = volume x density

Q: In a swimming pool measuring 90 m by 40 m, 150 men take a dip. If the average displacement of water…

A: The volume of the total displaced water will be equal to the volume of raised water.

Q: A square cube has sides with dimensions of 2.8 cm.  If the mass of the cube is 58 grams, what is the…

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Q: A spherical iron ball has a diameter of 11.6 cm and has a mass of 3.70 kilograms. This particular…

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Q: 1. Convert 1.35 x 10° km² to Liters Answ: 1.35 x10" liters 2. Convert 30 µg /f° to kg/m³ NB: (lft =…

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Q: A seller offered a piece of metal with dimensions 5.0mm x 5.0mm x 30.0mm and a mass of 0.0158 kg.…

A: Calculate the volume of the piece of metal. V=5.0 mm×5.0 mm×30.0 mm=750.0 mm3 Here, V is the volume…

Q: What is the mass of a rectangular shaped ice block with dimensions 0.03 x 0.02 x 0.01 m^3 if the…

A: The volume of a cuboid is given by V = lbh, where l = length b= breadth h = height The mass of a…

Q: A peregrine falcon can fly 322 kilometers per hour How many meters per hour can the falcon fly?

A: Dear student The relation between kilometer and meter js given by: 1 Kilometer = 1000 meter

Q: One cubic meter (1.00 m) of aluminum has a mass of 2.70 × 10 kg, and the same volume of iron has a…

A: Given: The volume of the aluminum rod is 1 m3. The density of aluminum is 2.7x103 kg/m3. The density…

Q: The acceleration due to gravity at sea level is 9.81 m/s^2 and is decreased by 0.001 m/s^2 for every…

A: As given in the question :the acceleration due to gravity at sea level (y) is 0.

Q: In the braking system of a specific car, the area behind the brake pedal is 2 cm squared, while the…

A: Area of brake pedal = a = 2 cm2 Force on the brake pedal = f = 12 N Area of the breaking pad = A =…

Q: Find the order of magnitude of the following physical quantities. (a) The mass of Earth's…

A: For order of magnitude put decimal after first digit andthen notice the factor of (10)   mass of…

Q: If the linear dimensions of an object are doubled, by how much does the surface area increase? By…

A: dimension of an object is doubled, the total area increases by a factor of 4 or 22.

Q: When I was a young adult , I made two trips down the coast of California on a bicycle. If I was…

A: The average speed of the bicycle = 8 miles/hr. Distance to be covered = 2.3 miles.

Q: A room has dimensions of 9.8 meters by 8.3 meters by 3.5 meters. Air has a mass density of 1.3…

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Q: A football field has 60,000 square feet. Convert this to square meters (1 inch=2.54 cm

A: Given Data: The area of a football field is, A=60,000 ft2 Conversion of a unit is defined as the…

Q: An object’s average density r is defined as the ratio of its mass to its volume: r = M/V. The…

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Q: An object’s average density ρ is defined as the ratio of its mass to its volume: ρ = M/V. The…

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Q: A volume is 8 feet long, 4 feet high, and 4 feet wide. Express this volume in m. (1 ft-0.3048 m)…

A: Ans:- Image-1

Q: A typical person has an average heart rate of 71.0 beats/min. Calculate the given questions. How…

A: Average heart rate of a person =71.0 beats/min

Q: A box measures 2 cm x 2 cm x 3 cm. Its volume is then A. 1.2 x 10-8 m3 B. 1.2…

A: Given data: Dimensions of the box 2 cm x 2 cm x 3 cm Required: Volume (V) in m3

Q: Starting from one oasis, a camel walks 25 km in a direction 30° south of west and then walks 30 km…

A: Introduction: Motion of the particle in one dimension can described with the help of one coordinate…

Q: A farmer wants to fence off his four-sided plot of flat land.He measures the first three sides,…

A: Equate horizontal component of the resultant vector to zero

Q: The extraterrestrials in an exoplanet in a distant galaxy have the following units to measure…

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Q: the clothing maker bought 500 m2m2 of this fabric, how much money did he lose? Use…

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Q: A high tech company uses a satellite to measure the size of features on the surface of the earth.…

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Q: radius (r) of the international reference kilogram cylinder is 1.95 cm. Assuming the density of the…

A: Given  Mass m = 1kg  Radius r = 1.95 cm = 1.95 ×10-2 m  Density d = 21.50 g/cm3…

Q: Longest to shortest length 10 yards 1 km 50 in 1*10^4 cm

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Q: You wish to calculate the average density of a substance, based on five density measurements. The…

A: The average density is the mean density which is given by  dav=d1+d2+d3....+dnn where, d1, d2 and...…

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.