A student throws rocks from the roof of a building. All of the rocks are thrown with the same initial speed v_0 and from the same initial height y_0, but they are thrown with different angles with respect to the horizontal. Derive an expression for theta_1, the angle at which the rock will land if thrown horizontally. Express yo
1. A certain nuclear power plant is capable of producing 1.0 X 10^9 W of electric power. During operation of the reactor, mass is converted to energy. How much mass is converted per hour if the efficiency of the plant is 30%? 2. What must be the speed of an alpha particle that has the same momentum as a neutron traveling with
Please do not place your response in a .pdf format, but Word documents are okay. Thanks! A cylinder with moment of inertia I about its center of mass, mass m, and radius r has a string wrapped around it which is tied to the ceiling. The cylinder's vertical position as a function of time is y(t). At time t=0 the cylinder is
The nucleus of the polonium isotope 214Po (mass 214 u) is radioactive and decays by emitting an alpha particle (a helium nucleus with mass 4 u). Laboratory experiments measure the speed of the alpha particle to be 1.59*10^7 m/s . Assuming the polonium nucleus was initially at rest, what is the recoil velocity of the nucleus that
A square block of side h and mass m is on an inclined hill of angle alpha. The coefficient of static friction between the block and the hill is us. Derive conditions for which the block will slip or tip.
9 Physics word problems: Magnitude of compass needle, magnet, magnetic field, alpha particle speed, current, coil, galvanometer, resistance
1. A compass needle in a uniform magnetic field of 0.30 T experiences a torque of 0.050 N * m when it points in a direction 45 degrees away from the direction of the field. What is the magnitude of the needle's magnetic moment? 2. A slender, 150-g bar magnet 15.0 cm long has a magnetic moment of 5.30 x 10^6 A * m^2. It is hel
1) An atom of an element with an atomic number of 95 and a mass number of 241 undergoes decay by emission of an alpha particle. What are the atomic number, mass number and name of the product atom? 2) An atom of 63Ni undergoes loss of a beta particle. What are the atomic number, mass number and name of the product atom?
A radioactive decay series that begins with 237/93 Np ends with formation of the stable isotope 209/83 Bi. How many alpha particle emissions and how many beta particle emissions are involved in the sequence of radioactive decay?
In a Rutherford scattering experiment, an alpha particle (charge = +2e) heads directly toward a gold nucleus (charge = +79e). The alpha particle has a kinetic energy of 5.0 MeV when very far (r to infinity) from the nucleus. Assuming the gold nucleus to be fixed in space, determine the distance of the closest approach. Use co
Please see attachments for question. Please use i, j and k vector coordinates in solving if possible.
Two hydrophobic glass slides measuring 1 cm x 1 cm x 1 mm are floating on water with their sides parallel to each other. Estimate the force of interaction between the solids as a function of their separation distance. Assume that the intrinsic contact angle of the water is 110 degrees. What I mean by the intrinsic contact a
1. The critical temperature of a substance is the a) temperature at which the vapor pressure of liquid is equal to the external pressure b) temperature at which the vapor pressure of the liquid is equal to 760mm Hg. c) temperature at which the solid liquid in vapor phases are in equilibrium d) temperature at which the liqu
The problem is in the attachment.
A block of mass m = 2.32 kg slides down an alpha = 29.2° incline which is h = 3.56 m high. At the bottom, it strikes a block of mass M = 7.06 kg which is at rest on a horizontal surface (see drawing in attached Word document). If the collision is elastic, and friction can be ignored, determine the velocity of the smaller block
Pu decays by alpha emission. The isotope's half-life is 2.4 x 10(exponent 4) yr. How many alpha particles are emitted per second by 25mg of Pu?
In the equation 226/88 Ra--> 4/2 He+ ------, the characteristics of the missing particle are: A) charge, 90; nucleons, 230 B) charge, 86; nucleons, 230 C) charge, 90; nucleons, 222 D) charge, 86; nucleons, 222
This is for Jhansi, Utter Pradesh, India OTA ID#103642 ONLY no others please.... Here are all the questions 1.After bungee jumping off a bridge, a person begins to swing as a pendulum, the rope being 77m long. The person's speed is 14m/s as it passes through it lowest point. A). Find the height to which it rises above thi
See the attached drawing file. The asking problem: A block of weight W=60 lb rests on a rough plane as shown. Knowing that "alpha"= 20° and Us (coefficient of static friction) = 0.30, determine the magnitude and direction of the smallest force P required to start the block up the plane. The answer of this problem for v