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1. A projectile is fired from ground level at an angle above the horizontal on an airless planet where g = 10.0 m/s2. The initial x and y components of its velocity are 86.6 m/s and 50.0 m/s respectively. How long after firing does it take before the projectile hits the level ground?
A. 5.00 secondsB. 10.00 secondsC.15.00 secondsD. 20.00 seconds
2. A rock is thrown from the roof of a building, with an initial velocity of 10 m/s at an angle of 30o above the horizontal. The rock is observed to strike the ground 43 m from the base of the building. What is the height of the building assuming no air resistance?
3. A 55-kg box rests on a horizontal surface. The coefficient of static friction between the box and the surface is 0.30, and the coefficient of kinetic friction is 0.20. What horizontal force must be applied to the box to cause it to start sliding along the surface?(Please Show Work/Explain)
A planet orbits a star, in a year of length 2.10 x 107 s, in a nearly circular orbit of radius 1.31 x 1011 m. With respect to the star, evaluate the tangential speed of the planet
Does current through a power supply increase when parallel bulbs are added? what is the current through the power source
A space probe journeys at a constant velocity from Earth to Tau Ceti (a distance of 10.9 y) in a time of 1.5 y as measured by the probe's internal clock
a u-shaped tube is filled mostly with water but some vegetable oil has been added to both sides of the u tube. on the
A drag racer, starting from rest, speeds up for 402 m with an acceleration of +21.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -5.75 m/s2. How fast is the racer moving 2.90 102 m after the parachute opens?
For the fan powered glider moving along the track the equation of the motion is. for the exploration of sensors labs there many things to look at. One is the g sensor. what is the one of the bottons on that sensor?
A drop of mercury released in the ocean and it sinks. Calculate the percentage change in the volume of the drop of mercury when it is at a depth of 1.0 km below the ocean surface
In a diffraction experiment, light of 600nm wavelengthproduces a first-order maximum 0.350 mm from the central maximum ona distant screen. obtain the wavelength of the light from the second source
A 1.80-kg object attached to a spring moves without friction (b = 0) and is driven by an external force given by the expression F = 2.30sin(2?t), Find the resonance angular frequency of the system
A steam turbine operates with 1.6 MPa and 350 degrees C steam at its inlet and saturated vapor at 30 degrees C at its exit. The mass flow rate of the steam is 16 kg/s, and the turbine produces 9000 kW of power. Determine the rate at which heat is los..
question1chlorine gas cl2 can be formed from a solution containing clminusions i.e. from naclminus by electrolysis.
The speed of light in a certain medium is 2.2E10^8 m/s. What is the index of refraction of this medium
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