A plastic sphere of density 700 kg/m³ and radius of 20.0 cm floats on the surface of a freshwater lake. a. Find the mass of the sphere. b. Find the buoyant force on the sphere. C. How much of the sphere's volume is submerged? d. How much force is needed to completely submerge the sphere?

Q: A small vegetable shop use the following electric appliances: (1) Two Air Conditioner of rating 1600…

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Q: Q2: The boat in Fig.2 is traveling at 40km/h. The rope to tow the parasail is 150m long. At the…

A: Given: Initial velocity of boat is 40 km/h Length of the rope to parasail is 150 meters At t=0…

Q: (a) What is the average power consumption in watts of an appliance that uses 2.79 kW · h of energy…

A: Given , Energy(E) = 2.79 kW.h OR.         E= (2.79)(3600)kilojoule                E= 10044 kJ

Q: which is more tiring, running or walking in the stairs? explain

A: Given : Which is more tiring running or walking in the stairs ?

Q: a pump can discharge about 181 liters of water in one day. This work done by the pump is equal to…

A: Given data: The amount of water pumped per day, V=181 L. The height of the person for which the…

Q: If the energy stored in the spring when it was stretched .25 m was used to launch a .1kg ball…

A: Given, m=0.1 kg x=0.25 m energy stored in the spring =12kx2 Where k is the spring constant and x is…

Q: gir A vehicle went akimbing up a gradient Consumes petrol at a rate of 14/8 km, while coming down it…

A: Given: A vehicle climbing up a gradient consumes petrol at a rate is 1 L/ 8 km A vehicle coming down…

Q: When a system can be homogeneous?

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Q: How much work is done to expand a 10-cm diameter cylindrical chamber at 1 atm from a length of 10 cm…

A: Hence, the work done is 79.58 J

Q: To bring a very big ship to a stop,  its engines are typically cut off about 25 kms from port. Why?

A: A very big ship has an enormous large amount of   mass , due to  this   its momentum will be very…

Q: A spring has a natural length of 20 cccc. If a 25 NN force is required to keep it stretched to a…

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Q: A wire 5 m long and 0.4 mm in diameter is stretched by a load 2 kg. If the extension in wire is 3…

A: Energy per unit volume =?Given:Length of wire (L)=5 mDiameter of wire (d)=0.4 mmd=0.4×10-3 mRadius…

Q: the electrical energy used by a household whose monthly electrical bill is $42, computed at the rate…

A: Givenmonthly electrical bill is $42At rate of $0.07 per kWh.

Q: How much work is done against gravity in lifting a 9 kg object through a vertical distance of 55 cm?…

A: Expression for force applied to lift the object -  F=mg Where m=Mass=9 kg  g=Acceleration due to…

Q: A small gasoline‐powered car weighs 1100 kg. The rear seating weighs 34 kg. How much energy and…

A: GIVEN Weight of the gasoline powered car = 1100 kg rear seating weighs 34 kg Lifetime of the car =…

Q: Show that the Force of Gravity is conservative.

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Q: [Numbers change] If this amount of energy were used to lift a person with mass 92 kg off the ground,…

A: Solution: let us calculate the amount of energy from the information of the power and of the laptop…

Q: As you will learn, carbon-14 (14C) is an unstable isotope of carbon. It has the same chemical…

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Q: As we’ve seen, the sun’s energy comes from fusion reactions that combine four hydrogen atoms to…

A: As from the give data, four hydrogen atoms combine to produce a single helium atom.  The reaction is…

Q: Large meteors sometimes strike the Earth, converting most of their kinetic energy into thermal…

A:

Q: a) Determine the reactions at A and E if P = 510 N. The reactions are positive if to the right or…

A:

Q: Problem 2) An electric lawn mower runs on 1000 watts of electrical power input. The same mower can…

A: Given data:  Power (P) = 1000 W Time (t) = 20 minutes = 1200 seconds Energy required (Eout) =…

Q: Discuss 10 practical ways by which energy can be conserved

A: The law of conservation of energy states that energy can neither be created nor be destroyed. It…

Q: Question 2 Below is a picture of a 16.667 Volt battery connected to a capacitor that originally has…

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: The reservoir is filled to a depth of 5 ft, and the water is to be pumped to thesame level as the…

A: No work is done if the water is to be pumped to the same level as the top. Now,Work done(W)…

Q: (a) Determine the reactions at A and E if P = 610 N. The reactions are positive if to the right or…

A:

Q: Evaluate the kinetic energy of a unit weight, in meters, flowing at 4m/s

A: kinetic energy is given by  K  = mv2/2. Here, k = kinetic energy m = mass = weight/g = (1/ 9.8)m/s2.…

Q: Name some physical quantities that are universally conserved.

A: The four physical quantities that are universally conserved are

Q: Why should the angle of swing be small few degrees), or, what would happen if the angle were large?

A: For oscillation of a bob hanging from a thread from a fixed point as shown in diagram below we have.

Q: What do you think is the difference between the everyday usage and the Physics usage of the phrase…

A: Conservation of energy : it's states that not the energy will create nor the destroyed. Only it's…

Q: There's a good chance you're completing this HW on a laptop. A typical laptop uses about 15 W of…

A: How much energy does the laptop battery hold when it is fully charged? Given, Power(P)=15 W…

Q: A stationery shop use the following electric appliances: () Three Air Conditioner of rating 2100 W…

A:

Q: To what distance has a body of 480N been lifted, if it has done a work of 960J?

A: Given data: Weight of the body (w) = 480 N Work done = 960 J Need to determine the lifted distance.

Q: As you see in Fig.5, a block of mass m = 0.59 kg is supported by a light rope that wraps around a…

A:

Q: Given: The energy equivalent of one gallon of gasoline is 1.3 x 10° J. A compact car has a mass of…

A: Given: The energy equivalent of one gallon of gasoline is Ee,gasoline=1.3×108 J/gal, The mass of…