How many revolutions does it make during the time
A motor spins an 2 kg block around on an 80 cm arm at 200 rpm. The blosk is supported by a steel table after the motor stops. How long does the block take to come to rest? How many revolutions does it make during this time?
Expected delivery within 24 Hours
Find the force exerted on an electron at this point, moving with a velocity of 240 i hat bold Mm/s.
Positive point-charges of +16.5 μC are fixed at two of the vertices of an equilateral triangle with sides of 2.45 m, located in vacuum. Determine the magnitude of the E-field at the third vertex.
It takes +4.0 J of work to move two charges from a large distance apart to 3.0 cm from one another. The charges have the same magnitude. How large is each charge? And what can you tell about their signs? Explain.
Two 10 cm-diameter charged disks face each other, 29cm apart. The left disk is charged to - 50 nC and the right disk is charged to + 50 nC . What is the electric field E, both magnitude and direction, at the midpoint between the two disks? What is
A small plastic sphere with a charge of -7.0 nC is near another small plastic sphere with a charge of -12 nC. If the spheres repel one another with a force of magnitude 8.7×10-4N , what is the distance between the spheres in cm?
A 13-kg ball moving at 24 m/s collides elastically and head-on with a second 5-kg ball moving in the opposite direction with -15 m/s. What is the speed of the first ball after the collision? Give your answer in m/s to three significant figures.
When the string of a guitar is pressed against a fret, the shortened string vibrates at a frequency 5.95% higher than when the previous fret is pressed.
As the gondola comes to the end of its run, it bumps into the terminal and sends a wave pulse along the cable. It is observed that it took 17 s for the pulse to return. What is the speed of the pulse and cable tension?
A football kicker can give the ball an initial speed of 34 m/s. What are the (a) least and (b) greatest elevation angles at which he can kick the ball to score a field goal from a point 45 m in front of goalposts whose horizontal bar is 3.44 m ab
Apparent Weight, A 550-N physics student stands on a bathroom scale in an 850-kg (including the student) elevator that is supported by a cable. As the elevator stands moving, the scale reads 450 N. (a) Find the acceleration of the elevator (magnit
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!