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When a single person can yell at a level of 80 dB SPL, determine how many yelling people will it take to reach the intensity of 120 db SPL? (Intensity twice with two listeners triples with three li
The Stars in a typical globular cluster orbit at speeds of around 10 km/s, and stars at the outskirts of a globular cluster are around 50 light-years from the center.
(i) Determine the magnetic deflection force which acts on the proton in the chamber? The proton mass is around1.67*10^-27kg. (ii) Determine the radius of the path of proton?
When radioactive substance provides a counting rate of around 1250 cpm at time t = 0, and a counting rate of 475 cpm at time t = 20 minutes, determine the half life of the substance.
The average counting rate of a radioactive sample is around 486 cpm. Determine the probability that in any given 10 second interval one gets less than 72 counts. Is this similar as the probability o
A Gieger counter computes 750 counts in 5.0 min. (i) Find out the average counting rate per minute and the standard deviation of the counting rate (ii) Determine the fractional error. (iii) How long
The other end is given an initial horizontal velocity in such a way that the precession is smooth with no notation. (i) Determine the magnitude of the angular velocity of precession?
A person of 88.0 kg stands on one leg and 90% of the weight is supported through the upper leg joining the knee and hip joint-the femur. Supposing the femur is 0.680 m long and consists of a radius
An object of 3.6 kg is supported through an aluminum wire of length 2.7 m and diameter 2.3 mm. Determine how much will the wire stretch?
A compact load of 23 kg is joined to the handle when it is at the similar height as the horizontal rotation axis. Avoid the effects of the friction. (i) Determine the initial angular acceleration of
The sides of the rod are insulated; therefore no energy is lost or gained except at the ends of the rod. If equilibrium is reached, determine the temperature of the blackened end?
An elevator having mass 750 kg is being lifted at constant speed through a cable wrapped around a wheel. The radius of the wheel is around 0.35 m. Determine what torque does the cable apply on the w
A barrel of mass 325 kg and radius 0.50 m rolls down the 37 degree ramp devoid of slipping. Determine the value of the friction force acting at the point of contact among the barrel and the ramp. Tr
A meter-stick is held to a wall through a nail passing via the 68.0 cm mark. The meter-stick is free to swing about this nail, devoid of friction. When the meter-stick is released from an initial ho
A soccer ball consists of a mass 0.5 kg, when a player rests her foot on the ball by pushing with 200 Newton vertically down find out the magnitude of the normal force which the ground applies on th
A diver of 70 kg steps off a 10 m tower and drops straight into the water. When he comes to rest 5 m beneath the surface of the water, find out the average resistance force which the water exerts o
A car of 2000 kg begins from rest and coasts down from the top of 5m long driveway which is sloped at an angle of 20 degrees with the horizontal. When a constant 4000 N frictional force resists the
An RL series circuit consists of 5.0-mH coil, 1.0- resistor, 12-V battery, ammeter and switch. After the switch is closed for a long time, determine the final value of the current.
A mass of 15kg is held 1.20 m over a relaxed spring having a spring constant of 320 N/m. The mass is dropped onto the spring. i) Determine how far does the mass compress the spring?
A 110 ball and a 240 ball are joined through a 38 long, mass less, rigid rod. The balls rotate around their center of mass at 130. Determine the speed of the 110 ball in m/s?
A ball is dropped from rest from the top of a building of 10 m. i) Determine the velocity of ball if it has fallen a distance of 3 m. ii) Determine the velocity of ball as it strikes the ground
A person pulls a sled from rest all along a rough horizontal surface. Given that the sled consists of a mass of 25 kg, the person pulls having a constant force of 50 N directed at an angle of 50 deg
A bullet having mass 3.00 g with an initial speed of around 800 m/s penetrates a tree to a depth of 6.00 cm. Employ the work-energy theorem to find out the magnitude of the frictional force applied
Throughout this time, the car is transferred 25m. When friction is neglected, determine: i) The final speed of the car. ii) The horizontal force with which the mechanic pushes the car
A block having mass 3 kg is pushed 2.2 m all along a frictionless horizontal table through a constant 16 N force directed 25 degrees beneath the horizontal. Find out the work done through: i) The a