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In a discussion person A is talking 1.9 dB louder than person B,and person C is talking 3.0 dB louder than person A. What is the ratio of the sound intensity of person C to the sound intensity of person B?
The water was originally at 0°C. The specific heat of water = 1.00 kcal/kg×°C, The original temperature of the ice was:
Stefan's Law describes the relationship between solar (black body) radiative output and black body temperature. what is the magnitude of the Solar constant
q1. a lightning bolt transfers 6.0 coulombs of charge from a cloud to the ground in 2.0 10-3 second. what is the
The energy of sunlight hitting the earth is about 1400 W/m^2 (where 1 W= 1 J/s) in mid day. Given that the sun is about 150 million km from the earth, estimate the total output of the sun
A charge of 2.65mC is placed at each corner of a square 0.450m on a side, Determine the direction of the force on a charge
Cost of electricity varies but typical values are around $0.15/kWh. Using this price, calculate the cost of making a piece of toast in 3.00 min with a 980W toaster
A grandfather clock is controlled by a swinging brass pendulum that is 1.3 m long at a temperature of 30.°C. What is the change in the length of the pendulum rod
If the slope is not frictionless so that the skier has a final velocity of 6 m/s, compute the force of friction (assuming it is constant), and the coefficient of kinetic friction.
A 7.00-kg crate slides 3.00 m down a ramp inclined at 55.0º below the horizontal. What is the net work done on the crate
The Earth (5.98 x 10^24 kg) and the Moon (7.35 x 10^22) kg are separated by an average distance of 3.84 x 10^8 m
A grinding wheel is initially at rest. A constant external torque of 47.2 N· m is applied to the wheel for 18.8 s, Find the frictional torque, which is assumed to be constant
A sinusoidal wave of frequency 350 Hz has a speed of 340 m/s. What is the phase difference between two displacements at a certain point at times 4.0 ms apart
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