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A straightforward method of computing the density of an object is to measure its mass and then measure its volume by submerging it in a graduated cylinder. Find what is the density of a 220 gram rock that displaces 87.0 cm3 of water?
A spherical mirror has a focal length of -14 cm. Where is the mirror's image for an object which is at a distance of 30 cm? Draw the ray diagram for this set up
A thin stick of mass M = 4.3 kg and length L= 1.7 m is hinged at the top. A piece of clay, mass m =0.7 kg and velocity V = 4.0 m/s hits the stick a distance x = 1.00 m from the sticks and hinge to it. What is the angular velocity of the stick immedia..
if a body is displaced horizontly through 5mts. by a constantforce, the work done is 10Joules. then find the mass of the body
A 7000-kg truck starts to roll down aroad with a 30 degree incline. People rush to stop it. How much force must they apply to stop it
A person with perfect pitch sits on a bus bench listening to the 438 Hz horn of an approaching car. If the person detects a frequency of 475 Hz, how fast is the car moving
On a safari, you are spearfishing while wading in a river. You observe a fish gliding by you. If your line of sight to the fish is 64.0° below the horizontal in air, and suppose the spear follows a straight-line path through the air and water afte..
in a simple model of the hydrogen atom the electron moves in a circular orbit of radius 0.053 nm around a stationary
An isotope of the element Thallium, Tl-206, undergoes beta decay with a half life of 3.1 minutes. what mass of the isotope will be left after 9.3 minutes have elapsed
a uniform door 0.81 m wide and 2.1 m high weighs 140 n and is hung on two hinges that fasten the long left side of the
A spinning object has a moment of inertia of 1.6 kg*m2. It is rotating at a rate of 1 rad/s. If the moment of inertia increases to 3 kg*m2, what is its new rotational velocity
A uniform disk is constrained to rotate about an axis passing through its center and perpendicular to the plane of the disk. find the average angular acceleration that the disk experiences
A planetary probe is designed to drop the vehicle's instrument package from a height of 20 meters above the planet's surface, Evaluate the acceleration due to gravity at the surface of the planet
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