L'A boat takes 3.0 hours to travel 30 km down a river, then 5.0 hours to return. How fast is the river flowing?

Q: Calculate the average density of the earth in terms of g, G and R.

A: To calculate: The average density of the earth in terms of g, G and R. Formula used: g=GMR2 Here, g…

Q: The diameter of the base of a tapered drinking cup is 6 cm. The diameter of its mouth is 9 cm. The…

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Q: A certain power plant uses fuel with heating value of 34,000 kJ/kg. What is the density of the fuel…

A: Heating value Q = 34,000 kJ/kg Temperature T = 573 R

Q: A stretched string has a mass per unit length of 5.27 g/cm and a tension of 10.5 N. A sinusoidal…

A: Answer:-  (a) The amplitude of the wave (Ym) = 0.150 mm  (b) we know that  The wave Speed (V) =( T/u…

Q: A heart beats 264 beats in 3 minutes. What is the unit rate?

A: Unit rate = Total number of heartbeatTotal time

Q: The least count of the main scale of a screw gauge is 1 mm. The minimum number of divisions on its…

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Q: What geometrical shape has the least surface area for a given volume?

A: The geometrical shape has the least surface area for a given volume is sphere.

Q: The SI unit of electrical energy is ____________ a) kilojoule (KJ) b) joules (J) c) watt (W) d)…

A: The correct answer is b.

Q: Name the physical quantity which is measured using meter scale ?

A: Meter scale is a device usee to measure length.

Q: A microwave oven has a power requirement of 1,251 W. A frozen dinner requires 6.8 min to heat on…

A: (a) Energy used in kWh

Q: How can I convert 1 x 10-3 Pa s to m2/s? or vice versa?

A: Pascal second (Pa-s) cannot be converted into m²/s. But it can be converted into N-s/m².     Pascal…

Q: As an agricultural engineer, you must design a trapezoidal open channel to carry irrigation water…

A: Given Cross-sectional area A = 55 m2 Determine the optimal dimensions to minimize the wetted…

Q: a certain field has a length of 516 ft. how long is the field in meters? answer only

A: Length, L = 516 ftWe have to convert length (in ft) to length (in m).

Q: What is the force acting on an airplane window if 70000 Pa is applied to the area of 0.18 m2?

A: Given  Pressure P=70000Pa Area A=0.18m2

Q: DEA agents watch drug smugglers load cocaine onto a fishing boat in a Mexican river to transport it…

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Q: DEA agents watch drug smugglers load cocaine onto a fishing boat in a Mexican river to transport it…

A: Initially boat is floating on water surface in equilibrium .At this situation weight of boat is…

Q: A substance has a hexagonal closed-pack crystal structure, if its density is 6.51 grams per cubic…

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Q: When there are 5 bits per symbol and 377 cymbals are sent to 40 ms, calculate the following. (a)…

A: Given: total number of symbols, baud = 377 number of bit per symbol, bit/baud = 5  time taken, t =…

Q: A microwave oven has a power requirement of 1,263 W. A frozen dinner requires 5.8 min to heat on…

A: Given data:Power requirement of microwave oven, P = 1263 W = 1.263 kWTime, t = 5.8 min = 5.8 / 60 =…

Q: At its peak, a tornado is 68 m in diameter and has 230 km/h winds. What is its frequency in…

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Q: Workout the problem. A Rock has a Mass of 640 grams, and is 2 cm Long, 8 cm wide and 2 cm in Height.…

A: Given: Mass of the rock = 640 gms Length of the rock = 2 cm Width of the rock = 8 cm Height of the…

Q: The solar power per unit area at the Earth's distance from the sun--called the "solar constant"--is…

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Q: if v is in meters per second, B in teslas, and L in meters, then the units of the right-hand side of…

A: It is given that the unit of velocity (v) is m/s, unit of magnetic field (B) is tesla and unit of…

Q: A ship travels 7 miles in 89 nearest whole number) Your Answer: Answer units

A: Given, Distance travelled by ship = 7 miles Time taken = 89 minutes = 1.48 hr We know that speed =…

Q: The drag force F on a boat is jointly proportional to the wetted surface area A on the hull and the…

A: Given that A boat experiences a drag force of (F1) = 220 lb when traveling at (v1)=5 mi/h With a…

Q: Find the density of the waste in units of kg/m3 for a sanitary landfill area of 100 dunums for a…

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Q: A uniform density sheet of metal is cut into the shape of an isosceles triangle, which is oriented…

A: Consider the whole triangle and the small inner triangle with the slice as the base. These are…

Q: A block of wood is kept on table top. The mass of wooden block is 5kg and its dimensions are…

A: mass of the wooden block = m= 5 kg dimensions = 40 cm × 20 cm × 10 cm the weight of the wooden block…

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: A hedge has been trimmed to look like a cone. The circumference of the base of the hedge is 2m. The…

A: Given that the circumference of the base of the hedge is 2m, then the radius is

Q: the relative density of liquid

A: Given data;  Mass of empty desnity bottle,m1= 21.8 g Completely filled water, m2= 41.8 g When,…