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In 9.00 days the number of radioactive nuclei decreases to one-eight the number present initially. What is the half-life (in days) of the material?
When a high-speed passenger train traveling at 170 km/h rounds a bend, engineer is shocked to see that a locomotive has improperly entered onto the track from a siding and is a distance D = 601 m ahead.
An airplane has a mass of 1.8×10^6 kg , and the air flows past the lower surface of the wings at 94 m/s .f the wings have a surface area of 1300 m^2, how fast should the air flow over the upper surface of the wing if the plane is to stay in the ai..
To measure the static friction coefficient between a 2.2-kg block and a vertical wall, the setup shown in the drawing is used. What is the coefficient of static friction
A 38.0-kg child swings in a swing supported by two chains, each 2.96 m long. The tension in each chain at the lowest point is 438 N. Find the child's speed at the lowest point
A certain projectile is launched with an initial speed v0. At its highest point its speed is v0 / 4. What was the launch angle
A winter hiker's body generates heat at a rate up to an utmost value of 126 W. She is hiking on a brisk day in which the outdoor temperature is 9 °C, whilst wearing a jacket with goose down insulation.
A weightlifter's barbell consists of two 15-kg masses on the ends of a 20-kg rod 1.6 m long. find the magnitude of the barbell's angular momentum
find out the magnitude of the gravitational force exerted by one on the other.
A 6.0 V battery is connected to a wire made of three segments of different metals connected one after another, Find the potential difference across tungsten wire
A set of jumpers cables used to start a car from another car's batterty is connected to the terminals of both batteries. What is the force per unit length on the cables
If the height of the candies in the container increases at the rate of 0.29cm/s, at what rate (kilograms per minute) does the mass of the candies in container increase.
The femur is a bone in the leg whose minimum cross-sectional area is about 3.60 multiply.gif 10-4 m2. Find the maximum stress that this bone can withstand
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