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A 71kg student runs at 6.0m/s , grabs a hanging rope, and swings out over a lake. He releases the rope when his velocity is zero, What is the angle when he releases the rope
A 63kg trampoline artist jumps vertically upward from the top of a platform with a speed of 4.9m/s, How fast is he going as he lands on the trampoline, 2.0 m below
A 3000kg space vehicle, initially at rest, falls vertically from a height of 3100km above the Earth's surface. Determine how much work is done by the force of gravity
NASA launches a satellite into orbit at a height above the surface of the Earth equal to the Earth's mean radius. The mass of the satellite is 740 kg. How much gravitational force does the satellite
A piece of luggage is being loaded onto an airplane by way of an inclined conveyor belt. calculate the work done on the bag
During WWII some paratroopers landed in gliders instead of dropped by parachute. The gliders had no power of their own, Find the lift force provided by the glider's wings
The rate constant for electron transfer between V 2+ (aq) and V 3+ (aq) is observed to depend on [H+]: k = a + b/[H+], where a and b are constants. Propose a mechanism and express a and b in terms o
A heavier mass m1 and a lighter mass m2 are 19.0 cm apart and experience a gravitational force of attraction that is 9.20 10-9 N in magnitude. Determine the value of each individual mass
A rocket, initially at rest on the ground, accelerates straight upward from rest with constant acceleration 39.2m/s2. Find the maximum height ymax reached by the rocket
What are the strength and direction of an electric field that will balance the weight of a 1.2 g plastic sphere that has been charged to -2.9 nC
A 100 MeV particle decays into two particles. one of these two particles has a mass of 10 MeV and a speed of 3/5. what was the inital particle's speed
A 100kg astronaut carrying a 1kg ball as she flies past a space station with a velocity of 3/5. what is her mass after throwing the ball
A spaceship with rest mass m0 is traveling with an x-velocity V0x=+4/5 in the frame of the earth. what is the energy of the photon torpedo in the frame of earth
A car of mass 1,800 kg is initially traveling at a speed of 15 m/s. Calculate the change in the kinetic energy of the car
Estimate the Debye Temperature of gold form the following information. For gold, the atomic weight is 197, the density is 19000 kg/m^3 and the velocity of sound is 2100m/s.
Briefly explain the natural greenhouse effect and how human activities are modifying this phenomenon and why are clouds so important in the modeling of climatic change?
Traditional slingshots of old were made from camel hair and are, on average, about 80 cm in length. How long would it take to reach this speed
Delivery trucks that operate by making use of energy stored in a rotating flywheel have been used in Europe. What is the kinetic energy of the flywheel after charging
What types of data records are used to provide information on historical climatic change and describe the three orbital parameters that affect climate on the time scale of Pleistocene glacial-intergla
A 1225 kg automobile starts from rest on a horizontal road and gains a speed of 83 km/h in 38 s. What is the average power required of the car during the 38 s interval
A spring has a force constant of 16 N/cm. How much work is needed to extend the spring an additional 7.6 mm
What is acid deposition, and what atmospheric constituents related to human activities are involved in acid deposition and Define pH. What is the concentration of hydrogen ions in a solution with a pH
A 8760-kg car is travelling at 27.8 m/s when the driver decides to exit the freeway by going up a ramp. What is the magnitude of the average drag force exerted on the car
Geostationary satellites used for television, weather tracking, or defense purposes are satellites that remain stationary over one point on the equator, What must be the period of the satellite's or
What observations led a large group of scientists in the 1950s and 1960s to become concerned about the problem of acid deposition and what role do temperature inversions play in the development of ph