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A 25 kg projectile is fired by accelerating it with anelectro magnetic rail on the earths surface. The rail makes a 30degree angle with the horizontal, and the guns applies a 1250 Nforce on the projectile for a distance of 7.50 m along the rail. (a.) Ignoring air resitance and friction, what it the net work doneon the projectile, by all the forces acting on it, as it moves 7.50m along the rail? (b.) Assuming it started at rest, what is thespeed after it has moved the 7.50 m?
The mean distance of Mars from the Sun is 1.52 times that of Earth from the Sun. Determine the mass of Earth from the period T
A 72.0-kg man is riding an escalator in a shopping mall. obtain the work done on man by the gravitational force
The moon's diameter is 3.48 x 10 6 m, and its mean distance from the earth is 3.85 x 10 8 m. what is the diameter of the moon's image on the screen
A 200-O resister, a 40.0-mH inductor and a 2.00-uF capacitor are connected in series with a 12--V rms source at 1000 Hz. What is the phase angle of this circuit
What is the mass in grams of 1L of helium gas as STP? (Find moles and then convert moles to grams; atomic mass =4.0grams/mol), Why do helium balloons float
A helicopter is rising at 4.60 m/s when a bag of its cargo is dropped. The bag falls for 2.50 s. (suppose that the positive direction is upward.)
A 10.0-g bullet traveling horizontally at 755 m/s strikes a stationary target and stops after penetrating 14.5 cm into the target. What is the average force of the target on the bullet
A car travels around an unbanked highway curve (radius .15 km) at a constant speed of 25 m/s. What is the magnitude of the resultant force acting on the driver
A 29.0 mH inductor has a reactance of 1.50 k. What is the new reactance of the capacitor
An object is located 15 cm in front of (to the left of) a converging lens with a focal length of 10 cm. To the right of the converging lens, compute the location of the final image
A car is towing a boat on a trailer. The driver starts from restand accelerates to a velocity of +10.3 m/s in a time of 31 s. Thecombined mass of the boat and trailer is 409 kg. The frictionalforce acting on the trailer can be ignored. What is the te..
when viewing an object with a magnifying glass whose focal length is 10 cm, What is the observed magnification
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