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When she leaves the track, she follows the characteristic path of projectile motion. Ignoring friction and air resistance, find the maximum height H to which she rises above the end of the track.
When an 81.0-kg adult uses a spiral staircase to climb to the second floor of his house, his gravitational potential energy increases by 2.25x10^3 J. By how much does the potential energy of a(n) 18
A 6100-kg satellite is in a circular earth orbit that has a radius of 2.7x10^7 m. A net external force must act on the satellite to make it change to a circular orbit that has a radius of 5.6x10^6 m
The thrust of its engines is 2.30x10^5 N. In being launched from rest it moves through a distance of 87 m and has a kinetic energy of 4.60x10^7 J at lift-off. What is the work done on the jet by the
A 38.0-N frictional force opposes the motion of the cart. (a) What is the magnitude of the force that the shopper exerts?
Draw a vector to represent the direction of the net force on the -q charge due to the other two charges when it is at those points.
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
If the distance between the two mirrors is 0.90 m, how far in front of the eyepiece should you place the photographic film to record the image of a star?
The final velocity of the train at the bottom of the hill is 4m/s. How much energy is lost as thermal energy? Write your answer to 3 significant figures
There are 200 students riding bikes each producing 110W of heat out put which is used for a heat engine which has an efficiency of 44.1% runing between 30c and -5c. what is the power in watts the he
Determine the diameter of the pupils of his eyes that would be required for him to be able to resolve the squirrels as separate objects. In this calculation use a wavelength of 498 nm (in vacuum) fo
(a) Calculate the resistance per unit length of a Nichrome wire, which has a radius of 0.321 mm. (b) If a potential difference of 10 V is maintained across a 1.0 m length of the Nichrome wire, what
The copper wire in a typical residential building has a cross-sectional area of 3.31 x 10-6 m2. If it carries a current of 10.0 A, what is the drift speed of the electrons? Assume that each copper a
An air-filled parallel-plate capacitor has a surface area of 7.60 cm2, separated by a distance of 1.80 mm. A 20.0 V potential difference is applied to these plates. (a) How much energy is stored in th
Two capacitors, one 12.0 µf and the other of unknown capacitance, are connected in parallel across a battery of EMF 9.0 V. The total energy stored in the two capacitors is 0.0115 J. A) What i
A 2.0μF capacitor and a 4.0μF capacitor are connected in series across 1000V. The charge capacitors are then disconnected from the source and connected to each other with terminals of like sig
The edges of a cube consists of equal resistors of resistance R, which are joined at the corners. Let a battery be connected to two opposite corners of a face of the cube. What is the efective resis
A 1.80cm x1.80cm parallel-plate capacitor has a 2.10mm spacing. The electric field strength inside the capacitor is 1.00×10^5 V/m . What is the potential difference across the capacitor?
Consider light that is refraced by a prism shaped like an equilateral triangle. The incident ray is parallel with the prism's base. What is the total deflection of the ray given that the index of re
Two parallel metal plates have area A=255cm2 and are sepearated by l= 0.50 cm. They have a potential difference of 0.25V. Find the numerical value of the electric field. What are the charge density
(a) What is the electric force exerted on an electron when it is 3.0 x 10-15 m from the center of the nucleus? (b) What is the acceleration of the electron at this point?
Use energy conservation to find the distance along the incline that the block slides before coming to rest.
Determine the shortest amount of time it took this signal to reach the Earth. Assume that the radii of Earth's and Mars' orbits around the Sun are respectively and .
Suppose you take a 2.0×102 resistor and a 0.40 inductor and make a series circuit with a voltage source that has voltage amplitude 30 and an angular frequency of 2.5×102 . Part A: What is
What must the potential difference between the plates be to hold the droplet in equilibrium?