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A tennis player serves a tennis ball such that it is moving horizontally when it leaves the racquet. When the ball travels a horizontal distance of 16 m, it has dropped 47cm from its original height when it left the racquet. What was the initial speed of the tennis ball? (Neglect air resistance.)
a copper wire of cross-sectional area3.20 times 10-6 m2 and length 3.60 m has a current of 2.40 a uniformly distributed
An intergalactic cruiser has two types of guns: a photon cannon that fires a beam of laser light and an ion gun that shoots ions at a velocity of 0.910c relative to the cruiser. Find at what speed do the aliens see the laser light
A car with a mass of 2200 kg is traveling at a speed of 40.0 km/h on an icy road when it collides with a 10000 kg truck which was traveling toward the car with the speed of 18 km/h
A high-voltage transmission line with a resistance per unit length of 0.320 ?/km carries a current of 960. A. Calculate the power loss due to resistance in the line
You want to construct a physical pendulum with a period of 4.0 s at a location where g = 9.8m /s2. (a) What is the length of a simple pendulum having this period?
A spaceship of mass 2.30×106kgis cruising at a speed of 4.70×106m/swhen the antimatter reactor fails, blowing the ship into three pieces. One section, having a mass of 5.10×105kg, is blown straight backward with a speed of 2.40×106m/s. A second piece..
A flat circular disk of radius R is uniformly charged withtotal charge Q. What is the magnetic fieldstrength at the center of the disk
A sodium atom (Z = 11) contains 11 protons in its nucleus. Strictly speaking, the Bohr model does not apply, as the neutral atom contains 11 electrons instead of a single electron. but, we can apply the model to the outermost electron as an approxima..
When the space shuttle (mass of the shuttle=2*10^6kg) was at the outer limit of Earth's atmosphere (distance= 350km above Earth's surface), astronauts measured the gravitational force from Earth to be equal to 1.7*10^7 newtons. Find the gravitatio..
A basketball player can jump vertically 0.9 m. Assume that the jump interval (from lowering the body to his feet taking off) lasts for 0.3 s and the mass of the player is 90 kg. Ignore air resistance. Determine the force that the the player exerts..
A pump discharges water at a rate 100kg/s with a guage pressure of 2atms. the flow is transported by a 10 cm diameter pipe up to an elevation of 5m
The crankshaft in a race car goes from rest to 3360rpm in 2.0s . What is the crankshaft's angular acceleration
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