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The drawing shows a person looking at a building on top of which an antenna is mounted. The horizontal distance between the person's eyes and the building is 91.7 m. In part a the person is looking at the base of the antenna, and his line of sight makes an angle of 32.7o with the horizontal. In part b the person is looking at the top of the antenna, and his line of sight makes an angle of 35.7o with the horizontal. How tall is the antenna?
A cannonball launched with an initial velocity of 131 m/s at an angle of 40° follows a parabolic path and hits a balloon at the top of its trajectory.
If the capacitor is discharged in 3.0 ms, how much charge passes through the body tissues, What is the average power delivered to the tissues
The bullet becomes embedded in the block. If the bullet-block system compresses the spring by a maximum of 88.0 cm, what was the speed of bullet at impact with the block.
A light spring of force constant k = 156 N/m rests vertically on the bottom of a large beaker of water. A 5.55-kg block of wood (density = 650 kg/m3) is connected to the spring, and block-spring system is allowed to come to static equilibrium. Wha..
A K+ ion and a Cl ion are directly across from each other on opposite sides of a membrane 8.9 nm thick. What is the electric force on the K+ ion due to the Cl ion? Ignore the presence of other charges. What direction will it go in relation to the ..
Charge of uniform density (80 nC/m^3) is distributed throughout a hollow cylinder region formed by two coaxial cylindrical surfaces of radii 1.0 mm and 3.0 mm. Determine the magnitude of the electric field at a point which is 2.0 mm from the symmetry..
As a engineer, you are designing a heat pump that is capable of delivering heat at the rate of 22 kW to a house. The house is located where, in January, the average temperature is 10°C.
An arrow is shot from a height of 1.9 m toward a cliff of height H, what is the height of the cliff in meters and what is the max height of the arrow along its trajectory in meters
A high-voltage transmission line with the resistance of 0.30 /km carries a current of 950 A. The line is at a potential of 710 kV at the power station and carries the current to a city located 161 km from the station.
Two boats are initially separated by distance d and head directly toward one another. The skippers of the boats want to arrive at the same time at the point that is halfway between their starting points.
On the Moon, the average surface temperature is 127 ?C during the day and -183 ?C during the night. What is the corresponding change on the Fahrenheit scale
Consider a binary separator used to separate aluminum cans from glass. A total mass of 0.8 tonne/hr enters. what is the recovery of aluminum
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