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A projectile fired from a gun has initial horizontal and vertical components of velocity equal to 30 m/s and 40 m/s, respectively.1. What is the speed of the projectile when it is at the highest point in its trajectory_________.2. What is the acceleration of the projectile when it reaches its maximum height__________.
A projectile is fired at an upward angle of 45° from the top of a 308m cliff with a speed of 198 m/s. What will be its speed while it strikes the ground below? (Use conservation of energy.)
A certain light source is found to emit radiation whose peak value has a frequency of 8.28 Ã- 1014 Hz. Find the temperature of the source
A krypton laser produces a cylindrical red laser beam 2.0 in diam with 2.0 of power. What is the light intensity on a wall 2.5 away from laser.
A parachutist relies on air resistance (mainly on her parachute) to decrease her downward velocity. She and her parachute have a mass of 52.5 kg and air resistance exerts a total upward force of 610 N on her and her parachute.
A 106 watt motor is used to lift a 114 kg container to a height of 6 m. How much time does it take to lift the container with the motor
A car takes 10s to go from v=0 m/s to v=25 m/s at constant acceleration. if you wish to find the distance traveled using the equation d=1/2 at squared, what value should you use for a squared?
A thin sheet of transparent material is surrounded by air. The sheet has an index of refraction of 1.47, Calculate the wavelength of the light in the material
A plastic bar is rubbed with fur, and the bar aquires a net charge of +8.34 uC. Determine the net charge on the fur
Two particles of mass m1= 2.6 kg and mass m2 = 4.8 kg that are free to move on a horizontal track are initially held at rest so that they compress a spring, Find the final velocities of the two particles
A coil of cross-sectional area .004m^2 consisits of 100 turns and has a resistnace of 4.5ohms. determine The maximum magnetic torque on the coil
Particles of charge Q1 = +69 µC, Q2 = +51 µC, and Q3 = -80 µC are placed in a line, Calculate the net force on each charge due to the other two
Calculate the length of a pipe that has a fundamental frequency of 694 Hz. (Take the speed of sound in air to be 343 m/s.)
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