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At a certain time a particle had a speed of 20 m/s in the positive x direction, and 2.2 s later its speed was 30 m/s in the opposite direction. What is the magnitude of the average acceleration of the particle during this 2.2 s interval? ______ m/s2
a 2.1103 kg car starts from rest at the top of a driveway that is sloped at an angle of 20 degrees with the horizontal.
A stone of weight W has specific gravity 2.51. When the stone is suspended from a scale and submerged in water, what is the scale reading in terms of its weight in air
A wodden raft has a density of 0,5*10^3kg/m^3 and dimension of 3,05m*6,1m*0,305m. How deep does it sink into the water when unloaded
A krypton laser produces a cylindrical red laser beam 2.0 in diameter with 5.0 of power. What is the light intensity on a wall 2.2 away from the laser
A wire is formed into a circle having a diameter of 10.3 cm and is placed in a uniform magnetic field of 2.84 mT. Find the maximum torque on the wire
When on the ground, Ian's weight is measured to be 692 N. When Ian is on an elevator, his apparent weight is 796 N. What is the net force on the system
A certain type of laser emits light that has a frequency of 4.9 × 1014 Hz. How many wavelengths are there in one pulse
A wheel makes 78.3 rotations during 5.45 s. What is the average angular velocity in that time interval
When a light bulb is connected across the terminals of a battery, the battery delivers 20.6 W of power to the bulb. A voltage of 10.4V exists between the terminals of the battery, which has aninternal resistance of 0.406. What is the emf of the batte..
Two identical guitar strings are prepared such that they have the same length (1.91 m) and are under the same amount of tension, What is the wave propagation speed on the guitar strings
A particular organic molecule forms an electric dipole by possessing an effective charge separation of 0.177 nm for a pair of ±1.60 × 10-19-C charges. (a) What is the magnitude of the molecule's electric dipole moment?
A tank holds 182 moles of argon gas (atomic mass = 6.633521 × 10-26 kg) at a pressure of 101300 Pa and a temperature of 308 K. How much kinetic energy is contained in this gas
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