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A 3kg particle has position as a function of time given by (-3,+1 m/s*t)x +(4m+ m/s t)y -(3 m/s* t)z What is the particle's angular momentum about the origin at t=5s?
A mountain climber gains 897 m in elevation on a particular hike. Consider the climber's body as a heat engine, how much heat does the food supply
A power plant that uses the temperature gradient of the ocean has been proposed. The system is to operate between 21°C (surface temperature) and 6°C (water temperature at a depth of about 1 km).
A spaceship is moving away from Earth at a speed of 0.65c. A light source on the rear of the ship appears blue (? = 450 nm) to passengers on the ship. Which color (what wavelength) would that source appear to an observer on Earth monitoring the reced..
In a bizarre experiment devised by a physics teacher and an industrial arts teacher at a local high school, Find the mass of ethylene glycol m_c in kilograms to three significant digits
A container holds 2.0 mol of gas. The total average kinetic energy of the gas molecules in the container is equal to the kinematic energy of an 8.0 X 10^-3kg bullet with a speed of 770m/s
Waves of frequency 198 Hz and amplitude 1.48 cm move along a 21.0 m string that has a mass of 0.046 kg and a tension of 48.0 N
It stops 90 cm from where you free it. The spring steady is 370 N/m. What is the coefficient of kinetic friction between the block and the table.
In coming to a stop, a car leaves skid marks 81 m long on the highway. Assuming a deceleration of 4.30 m/s 2 , estimate the speed of the car just before braking
As a dilligent physics student, you carry out physics experiments at every opportunity. At this opportunity, you carry a 1.35-m-long rod as you jog at 3.05 m/s, holding the rod perpendicular to your direction of motion. What is the strength of the..
determine the force P needed to support the 100-lb weight. Each pulley has a weight of 10 lb. Also, what are the cord reactions at A and B
a 4.0-kg hanging mass is connected by a string over a pulley to a 8.0-kg block ona frictionless ramp with an angle of inclination of 40 degrees above the horizontal
A car of mass 1,000 kg starts from rest and accelerates to a velocity of v = 24 m/s in a time interval of ?t = 11 seconds. what force is needed for this acceleration
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