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Two trains, one traveling at 72km/h and the other at 144km/h are headed toward each other on straight level track. When they are950m appart, each engineer sees the other train and applies the brakes. If the brakes decelerate each train at a rate of 1.0m/ssquared, determine if the there is collision.
An aluminum cup contains 225 g of water and a 40 g copper stirrer, all at 27°C. Calculate the mass of the aluminum cup
a 6.30 cm tall object is placed 24.1 cm in front of a concave mirror with a focal length of 5.00 cm. what is the
If energy were conserved in each collision, what would you expect the ratio of the total kinetic after the collision to the total kinetic energy before the collision to be? Are there anyof your collisions where energy is not conserved? Is this exp..
Planet X is 307 times more massive than Earth, and its radius is 10.8 times Earth's radius. How many times more would you weigh on Planet X
A grating spectrometer is used to resolve second order peaks from two wavelengths of ?1 = 495.00 nm and ?2 = 495.71 nm. What is the minimum number of slits this grating must have
An airplane with a speed of 89.1 m/s is climbing upward at an angle of 48.4 ° with respect to the horizontal. When the plane's altitude is 548 m, the pilot releases a package. Relative to the ground, determine the angle of the velocity vector of the ..
q1. a magnifier has a magnification of 8 times. how far from the lens should an object be placed so that its virtual
Introductory Mechanics: Calculate the smallest coefficient of static friction
An airline pilot pulls her 12.0 kg rollaboard suitecase alongthe groung with a force of 25.0 N for 10.0 m. The handle she pullsmakes an angle of 36.5 degrees with the horizontal. How much workdoes she do over the ten meter distance?
you are trying to determine the wavelength of a particular line of a samples emission spectrum using a diffraction
A square, 0.67 m on a side, is mounted so that it can rotate about an axis that passes through the center of the square. What is the magnitude of the maximum torque
A 63kg trampoline artist jumps vertically upward from the top of a platform with a speed of 4.9m/s, How fast is he going as he lands on the trampoline, 2.0 m below
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