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A projectile is launched with an initial speed of 40 m/s at an angle of 20° above the horizontal. The projectile lands on a hillside 3 s later. Neglect air friction.
(a) What is the projectile's velocity at the highest point of its trajectory?
(b) What is the straight-line distance from where the projectile was launched to where it hits its target? (Note that the hill may slope up or down from the launch point.)
Two people are carrying a uniform 728.0 N log through the forest. Bubba is 3.1 m from one end of the log (x), What weight is Bubba supporting
Develop the string length ratios for Locrian mode by starting with'B' and then lowering (never raising) pitch by perfect fifths, 6times. If frequency corresponding to 'B' is 495 Hz, what is thefrequency corresponding to 'F'?
Assume the masses of the chains, pulleys, and ropes are negligible. Determine the force F required to lift the crate with constant speed. Identify the tension in the upper chain.
If a harmonic object has a displacement that is described by: X = (.25m) sin (10 t), calculate the maximum velocity of this object
Hail is falling on the roof of a car at a mass rate ofm/t = 0.070kg/s and an inital velocity of v0 = -10m/s, Calculate the force exerted by the hail on the roof
An interplanetary spaceship passes through the point in space where the gravitational forces from the moon and the earth on the ship exactly cancel. How far from the center of the earth is it
Light from an argon laser strikes a diffraction grating that has 5350 grooves per centimeter. Determine the wavelength of the laser light
A charge +q is located at the origin, while an identical charge is located on the x axis at x = +0.76 m. Where should the third charge be located
Near Earth, the density of protons in the solar wind (a stream of particles from the Sun) is 12.8 cm-3, and their speed is 522 km/s. what total current in amperes Earth receive
a particle moves along the x axis. it is initially at the position 0.180 m moving with velocity 0.100 ms and
Two rods AB and BC have charges +2Q and -2Q uniformly distributed on them. They are bent in the shape of arcs of a circle and joined at B. Find the linear charge density on rod AB
A closed box is filled with dry ice at a temperature of -88.7 oC, while the outside temperature is 23.3 oC. Find the thermal conductivity of the material from which the box is made
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