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Suppose you have a spherical balloon filled with air at room temperature and 1.0 atm pressure; its radius is 18cm. You take the balloon in an airplane, where the pressure is 0.75 atm.
If the temperature is unchanged, what's the balloon's new radius?
In one design, a large spring with spring constant 2×10^4 N/m was placed behind the cannon. The other end of the spring braced against a post that was firmly anchored to ship's frame.
An object attached to a horizontal spring is oscillating back and forth along a frictionless surface. The maximum speed of the object is 1.25m/s.
Create a graph of x-position, x-velocity, and x-acceleration versus time and a graph of y-position, y-velocity, and y-acceleration versus time.
The pilot of an aircraft wishes to fly due west in a 37.70 km/h wind blowing toward the south. The speed of the aircraft in the absence of the wind is 191 km/h.
while the airport sends out a rescue crew, how far will the crew have to fly to reach the aircraft if they fly in a straight line from Galisto?
A 5.50kg mass traveling at 3.5 m/s on a fricktionless tabled suddenly collides, What will be the maximum compression of the spring after the composite collides into it
In a photoelectric effect experiment, visible radiation is incident upon a metal of work function 1.05 eV. What is the wavelength of the incident radiation
A firefighter at a distance d from a burning building directs a stream of water from a fire hose at angle θi above the horizontal as shown in Figure. If the initial speed of the stream is vi. At what height h does the water strike the building?
An 9.00 {rm kg} point mass and a 15{rm kg} point mass are held in place 50{rm cm} apart. A particle of mass m is released from a point between the two masses 19{rm cm} from the 9{rm kg} mass along line connecting the two fixed masses.
What is the buoyant force acting on a cube of copper that measures 4.49 cm on its each side if it is immersed in water. The density of copper is 8933kg/m3
A normal electric power cord consists of two parallel conductors about 4 mm apart. Estimate the magnetic field strength (in N/C) about 30 cm from a linear 25 m power cord connected to a 100 W lamp
The coefficient of static friction between the ladder and the ground is 0.55, and the ladder makes a 50.0° angle with the ground. Explain how far up the ladder can an 870 N person climb before the ladder begins to slip?
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