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An astronaut on a distant planet wants to determine its acceleration due to gravity. The astronaut throws a rock straight up with a velocity of + 20.0 m/s and measures a time of 28.6 s before the rock returns to his hand. What is the acceleration due to gravity on this planet? (positive = up, negative = down)
In a head on collision, a 4,000 kilogram truck going 10 m/s east strikes a 1,000 kilogram automobile going 20 m/s west. Find how much kinetic energy was lost in the collision
as a fish jumps vertically out of the water assume that only two significant forces act on it an upward force f exerted
A flat loop of wire consisting of a single turn of cross-sectional area 8cm2 is perpendicular to a magnetic field that increases uniformly in magnitude from 0.5 T to 2.5 T in a time of 1.9 s. Calculate the resulting induced current
A uniform plank of length 5.0 m and weight 211 N rests horizontally on two supports, with d = 1.17 m of the plank hanging over the right support. To what distance, x, could a person who weighs 412 N walk on the overhanging part of the plank before..
A hammer taps on the end of a 4.20 m-long metal bar at room temperature. A microphone at the other end of the bar picks up two pulses of sound, What is the speed of sound in this metal
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?
The period of the earth around the sun is 1 year and its distance is 150 million km from the sun. What is the orbital velocity of the asteroid
Two conductors having net charges of 14 µC and ?14 µC have a potential di?erence of 11.1 V. Determine the capacitance of the system
you are given a 120 V battery;a hairdryer designed to workproperly at 120 V, where it's rated at 1,200 W; and a mixer designed to work properly at 60 V, where its rated at 120 W. Youalso happen to have a large supply of 60 Ω resistors.
An aircraft takes off at 203 km/h after accelerating from rest at 2.14 m/s2. What is the minimum runway length required
ltbrgt 1how does the quantum dot bind to the antibodies ie quantum dots and anti-her1 or anti-her2neu scfv antibodies
A cannonball is shot from a cannon on a cliff at a height of 12.4 m at a ship on the ocean. What is the total time in the air for the cannonball
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