The typical American man has a leg length of 0.85 m and walks at a speed of 1.4 m/s. A giraffe’s legs are 1.8 m long. At what speed do you expect a giraffe to walk?

Q: Three people are walking. The first person walks at a slow pace, the next walks at a medium pace,…

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Q: An electron started his movement with speed of 90 nanmeter/picosecond. How long (in meters) the…

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Q: The bacterium Escherichia coli (or E. coli) is a single-celled organism thatlives in the gut of…

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Q: After completing a journey of 84 km. A cyclist noticed that he would take 5 hours at least. if he…

A: Let the speed of cyclist be v Distance cyclist travelled d= 84 km Cyclist take time t= 5 hours If it…

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: Q8: One gallon of paint (volume = 3.78 x 10° cm³) covers an area of 25.0 m². What is the thickness…

A: Volume is equal to the area times thickness. Therefore, Volume=Area×ThicknessV=A×t

Q: graph of x vs. t4, with x on the vertical axis and t4 on the horizontal axis, is linear. Its slope…

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Q: The thickness of a human hair is 0.015cm. This thickness is same as O a. 0.15 um O b. 1500 um O C.…

A: Length: We have different units of measurements to measure lengths. The bigger unit of measuring…

Q: How many g are there in 1mg? a) 1 x 10^6 g b) 1 x 10^-6 g c) 1000kg d) 1 x 10^-3 g

A: Answer is Option (d)

Q: In Sl units, the dimensions of are Ho A. [ML3TA] B. [M1 L2T3 A²] C. [ML3/2 T-3 A] D. [M1L1 T2 A]

A: Introduction :- Here we need to find the dimension of ε0 and μ0 . After separately finding the…

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: The first displacement is 6 m and the second displacement is 3 m. They cannot add together to give a…

A: Total displacement will have maximum magnitude when the two displacements are in same direction. The…

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: The following conversion equivalents are given:1 mile = 5280 ft 1 ft = 12 in 1 m = 39.37 in 1 hour =…

A: Using the given conversion, the velocity in m/s is equal to,

Q: The number 0.0078 has how many significant figures? (a) 1.        (b) 2.      (c) 3.…

A: Given: 0.0078  The zeros which are after the decimal and before the non zero digits are not…

Q: The kinetic energy E of an object varies jointly with the object’s mass m and the square of the…

A: The object’s kinetic energy can be represented as, Here, m, v, and k represent the object’s mass,…

Q: after 2 minutes and 16 seconds. Okm 1km 2km 3km 4km 5km 6km 7km 8km 9km 10km 11km An object moves…

A: Given: AB = 5 km BC = 4 km CB = 4 km BC = 4 km

Q: Your answer is partially correct. Horses are to race over a certain English meadow for a distance of…

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Q: Sarah G went to her outside faucet in garage to fill a 0.0189 m3 bucket with water to bath her dogs.…

A: Given:potential, V = 0.0189 m3speed, v = 0.61 m/sradius, r = 0.0078 m

Q: The speed of a nerve impulse in the human body is about 100 m/s. Estimate the time it takes the…

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Q: 1. A person crosses a 600 m long street in 5 minutes. What is his speed in km per hour? А. 3.6 В.…

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Q: Which of the following is the best estimate for the mass of all the people living on the Earth? (a)…

A: Answer The population of the world is 6 billion  Assuming average weight of a human body is 50 kg…

Q: The units for energy are kgm^2/s^2. What units must the constant A have in the following…

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Q: A rug measures 8 feet in width and 12 feet in length. What is the area of the rug in square meters?…

A: Write the given values with the suitable variables. b=8 feetl=12 feet Here, b and l are the width…

Q: The sum of the numbers 436.32, 227.2 and 0.301 in appropriate significant figures is (a) 663.821 (b)…

A: Adding the givens, Sum=436.32+227.2+0.301        =663.821

Q: How many helium balloons would it take to lift a person?

A: Helium can lift 1g per L A helium balloon on an average have 15L of gas, thus it can hold or lift…

Q: What is the speed of a runner who goes around the entire oval of the track a distance of 400 meters…

A: The speed of the runner is, v=dt

Q: walks on a piece of graph paper straight along the a axis a distance of 10.0 cm in 1.80 s . It then…

A: Solution:-

Q: What is the speed difference between nanoseconds and milliseconds?

A: 1 nanosecond= 10-9 second and  1 millisecond = 10-3 second Then the difference between two is equal…

Q: How many significant figures are there in (a) 78.9 ± 0.2, (b) 3.788 × 10

A: Significant figures shows that the figures which gave the accuracy in the measurement.

Q: 18. The number of significant figures in (0.062) is: A 1 B2 C 3 D 4

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Question 13.20 Review Prove that the expression (A2 – x2) has dimensions of speed. Your Answer No…

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Q: The numbers 2.745 and 2.735 on rounding off to 3 significant figures will give (a) 2.75 and 2.74 (b)…

A: When rounding numbers consider the significant digits you want to round to. Here the numbers are…

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

A: Initial Velocity = v0 = 0 m/s       . . . . (Initially the rock is at rest) Time = t = 5 s…

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: Porsche's acceleration of 3.5 m/s2m/s2 is larger than the Honda's 3.0 m/s2m/s2, the Honda gets a 1.0…

A: In these calculations the objects in motion are treated as point objects and force acting on the…

Q: The gasoline consumption of a small car is advertised as 12 km/L. How many miles per gallon is this?…

A: Given data: The gasoline consumption of a car = 12 km/L 1 mile = 1.6 km 1 gallon = 3.8 liters…

Q: given that A + B =x1i + y1j and A-B = x2i + y2j what is A?

A: Given: A→+B→=x1i^+y1j^A→-B→=x2i^+y2j^

Q: Q5: A solid piece of lead has a mass of 23.94 g and a volume of 2.10 cm³. From these data, what is…

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Q: Question 14 In one of the labs, a student took multiple measurements for the length of a wooden…

A: Given data for length  35.7, 35.6, 35.6, 35.8, 35.7, 35.8

Q: 0.200 m/s 0.400 m/s 30.0 g 10.0 g

A: In an elastic collision, the momentum of the system is conserved.  The momentum is given by  p = m v…

Q: A person walks 4 m to the park, then he walks 8200 km in the park then he returns back to home after…

A: Write the given values with suitable variables. d1=4 md2=8200 km=8200×103 md3=720 cm=7.2 m Here, d1…

Q: A weight lifter can bench press 191 kg. How many milligrams (mg) is this? a) 1.91 × 108 mg b) 1.91 ×…

A: Given :- A weight lifter can bench press 191 kg .

Q: How much does the speed change over the first 3 seconds (in cm/s) ?

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Q: 1. Which of the following three physical quantities x, y and z are all scalar? |Y Z Speed Velocity…

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Q: Horses are to race over a certain English meadow for a distance of 7.3 furlongs. What is the race…

A: Given Distance 7.3 furlong 1furlong=201.168m 1rod=5.0292m 1chain=20.117m

Q: In Sl units, the dimensions of E0 are A. [ML3TA1] B. [M1 L2 T3 A²] C. [M L3/2 T-3 A] D. [M1 L1T2 A]

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Q: If you are filling a tank with water at the rate of 10 liter per min. How long (in hours) will you…

A: Given data :- rate of filling water Q = 10 liter/min side of a cubical tank a = 100 cm = 1 m

Proper Length

The theory of special relativity explains the connection between space and time to objects that move in a straight line at a constant speed. The objects move at the speed of light. When an object approaches light speed, its mass is endless and cannot move faster than light. The most crucial postulate of Einstein's special relativity is that the laws of nature do not change in each frame of reference.