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A hot air balloon is rising upward with a constant speed of 10 m/s. When the balloon is 4 m above the ground, the balloonist accidentally drops a compass over the side.
a.) How much time elapses before it hits the ground?
b.) What is its speed just before it hits the ground?
c.) How high above the ground is the balloon when the compass hits the ground?
The intake in the figure has cross-sectional area of 0.79 m2 and water flow at 0.44 m/s. What is the pressure difference between inlet and outlet
A diverging lens (f = -11.0 cm) is located 25.0 cm to the left of a converging lens (f = 36.0 cm). What is the height of the final image
Trucks with diesel engines have an efficience of about 40%. How much energy is requried to accelerate an 8,000kg truck from rest to 25 m/s
An artificial satellite is in a circular orbit around a planet of radius r = 5.55 x 103 km at a distance d=520km from the planet's surface. What is the average density of the planet
q1.a square coil of wire with 15 turns and an area of 0.40 m2 are placed parallel to a magnetic field of 0.75 t. the
In a photoelectric effect experiment, a metal sample is illuminated by 10.0 mW of ultraviolet light of wavelength 240 nm. What is the longest wavelength of light that can knock electrons out of this metal
Two blocks are connected by a string. The smooth inclined surface makes the angle of 35 degrees with the horizontal, and the block on the incline has a mass of 5.7 kg.
A carbon resistor is made of a cylinder of carbon, of diameter 7.4 mm. what is the length of the cylinder
A batter hits a 0.140-kg baseball that was approaching him at 30.0 m/s and, as a result, What is the average force exerted by the bat
Police investigators, examining the scene of an accident involving two cars, measure 72 -long skid marks of one of the cars, Estimate the initial speed of the car assuming a level road
A construct force vector F = 2.0i + 4.0j N acts on an object as it means along a straight- line path. If the object is displacement is d = 2.0i + 5.0j m calculate the work done by vector F
The motor in a refrigerator has a power of 156 W. If the freezing compartment is at 268 K and the outside air is at 302 K, what is the maximum amount of energy
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