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if a child pours 210ml juice in a glass and then drinks one seventh of it, after which he adds another 30% of what is left in the glass to it, how much juice is in the glass
A cubic wood box with a length, L = 0.3 m and mass = 300 kg is held with a
string in an open beaker of an unknown liquid with density = 1110 kg/m3
.
Assume that the atmospheric pressure is 1.00 atm
Determine,
i. the downward force
ii. the upward force
iii. the tension in the string
iv. the buoyant force of the cubic wood box. Identify the relations of these
types of forces
A submarine has been damaged from an explosion at the depth of 250 m
below the surface. A man tries to escape from the submarine by using a pop-
out hatch, which is 1.8 m by 0.9 m in size. Determine the value of the force
needed for the man to push out at 250 m depth below the surface.
(Density of sea water = 1024 kg/m3, internal air pressure = 1.00 atm)
A car driver drives to the north on a straight two-lane road at a constant
speed of 80 km/h. A truck driver traveling to the south at a constant speed
of 100 km/h approaches the first car (in the other lane).
i) What is the truck velocity relative to the car?
ii) What is the car velocity relative to the truck?
iii)Do the relative velocities change after the truck and the car passed each
other? Why?
A metal wire 75.0 cm long and 0.130 cm in diameter stretches 0.0350 cm when a load of 8.00 kg is hung on its end. Find the stress, the strain, and the Young’s modulus for the material of the wire.
A dam is designed to withstand a pressure of 7840 lb/ft². Find the maximum depth of water that the dam could support.( A dam should not be built this tall—it should be designed to allow water to run over before reaching such dangerous condition.)
60° = 50 m/s
There is an ongoing repair at Mrs. Trinket's house and a brass window of her house has dimensions of 15 cm by 12 in at 280C.
The capacitance of a parallel plate air capacitor is 350.0mF. When a sheet of a dielectric is inserted between the plates, the capacitance increases to 2100.0mF. What is the permittivity of the dielectric?
What is a ratio? Give several examples of ratios in everyday use.
