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A rectangular air mattress is 2.2m long, 0.57 m wide, and 0.07 m thick. If it has a mass of 2.0 kg, what additional mass can it support in water?
kg
A simple pendulum is made of a small blob of mass m = 9.500 kg attached to the end of an inextensible wire. What is the magnitude of the tension in the wire
A 24kg golden retriever spots a squirrel and gives chase. How much time does it take the dog to go from rest to 10.8 m/s
A spherical Christmas tree ornament is 3.84 cm in diameter. What is the magnification of the image of an object placed 11.1 cm away from the ornament
An electric dipole consists of charges +2e and -2e separated by 0.78nm. It is in an electric field of strength 3.4 x 106 N/C. Calculate the magnitude of the torque on the dipole
Astronomers discover a binary star system that has a period of 93.0 days. The binary star system consists of two equal-mass stars, each with a mass twice that of the sun, that rotate like a dumbbell about the centre of mass at the midpoint between..
Suppose you walk into a sauna that has an ambient temperature of 50.0 C. Calculate the rate of heat transfer to you by radiation given your skin temperature is 37.0 C
A child's toy consists of a piece of plastic attached to a spring. The spring is compressed against the floor a distance of 2.0 cm and released. If the spring constant is 85 N/m, what is the magnitude of spring force acting on the toy at the moment i..
A very small charged block with a mass of 2.10 g is placed on an insulated, frictionless plane inclined at an angle of 17.0° with respect to the horizontal, What is the sign and magnitude of the charge on the block
The bulk modulus for a given fluid is 1.85E+9 Pa, and the fluid density is 1000.0 kg/m3. What is the bulk modulus of this fluid
A 120.kg refrigerator is at rest on a kitchen floor ( mu of s= 0.43 and mu of K= 0.27). How much force is needed to move the refrigerator at a constant speed of 5.41 m/s
The orbital radius of a planet about the sun is a) greater when the period of revolution is shorter b) greater when the period of revolution is longer c) greater when the mass is greater d) independent of the period of revolution e) greater when the ..
q1. an important news announcement is trans- mitted by radio waves to people who are 122 km away sitting next to their
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