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A hot-air balloon is descending at a rate of 2.4when a passenger drops a camera. If the camera is 48 above the ground when it is dropped, how long does it take for the camera to reach the ground?
One of the principles of great importance in electric circuit design is the maximum power transfer theorem between a power supply and a load. In an electric circuit, Rh is the regulating resistor an
A light rope passes over a light, frictionless pulley. One end is fastened to a bunch of bananas of mass M, and a monkey of mass M clings to the other end.
A distance of 1.27 as it falls to the ground, how much time is required for the torso to come to rest once it contacts the ground?
A petite young woman distributes her 500 N weight equally over the heels of her high-heeled shoes. Each heel has an area of 0.750 cm2. a) What is the pressure exerted on the floor by each heel? b)
V=12 volts and R=100 Ohms. At a certain setting of the rheostat the ammeter reads I = 35 micro amps. Calculate resistance of the rheostat Rh at that setting and find Vh and Vr. What's the sum of Vh
A spring is hung from the ceiling. Attaching a 500 g physics book to the spring causes it to stretch 20 cm in order to come to equilibrium. What is the spring constant?
How far is the crate from the aircraft when the crate hits the ground, assuming that the plane continues to fly with the same velocity?
A chemist mixes 500 g of lead at 500°C with 1,200 g of water at 20°C. She then mixes 500 g of copper at 500°C with 1,200 g of water at 20°C. The specific heat capacity of lead is 0.1
The body makes an angle of 75 degrees with respect to the horizantal surface of water. Determine her velocity, both magnitude and direction.
Two lenses of focal length +25cm and -10cm (convex and concave) respectively are placed in contact. What is the power of the combination?
An earth satellite remains in orbit at a distance of 17811 km from the center of the earth. What speed would it have to main- tain? The universal gravitational constant is 6.67 × 10-11 N &mid
Why must cell division be controlled to remain healthy?
A hammer taps on the end of a 3.17 m long metal bar at room temperature. A microphone at the other end of the bar picks up two pulses of sound, one that travels through the metal and one that travel
Find the electric feild a distance 'z' above one end of a strait line segment of lenth 'l' which carries a uniform line charge 'lamda' ?
The value of the gravitational field strength at your location is 9.792 N/kg. How high above sea level, where the gravitational field strength was measured to be 9.803 N/kg, are you located?
What kinds of information can be found by knowing the sequence of a DNA molecule?
What are the two basic schools of thought regarding the demographic transition?
Determine the minimum distance, x, from point A at which an additional weight w (the same as the weight of the rod) can be hung without causing the rod to slip at point A.
Have you ever tried to pack too much into a suitcase?
How fast would you need to drive the Mini Cooper in this tight circle to match the magnitude of the Mustang's acceleration?
Many scientist believe that crustal plate movement occurs becuase of convection cells contained in the earths
If the football has a mass of 0.45 kg and the time of contact with the ball is 0.015 s, what is the magnitude of the force exerted by the ball on the kicker's foot?
A pet-store supply truck moves at 25m/s north along a highway. Inside, a dog moves at 1.85m/s at an angle of 35° east of north. What is the velocity of the dog relative to the road?
A rifle with a weight of 30 N fires a 5.0-g bullet with a speed of 300 m/s. Find the recoil speed of the rifle.