Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
A tunnel under a river is 2km long. At what frequencies can the air in the tunnel resonate? Explain whether it would be a good to make a rule against blowing your car horn when you are in the tunnel
A soccer player kicks the ball toward a goal that is 27.0 m in front of him. The ball leaves his foot at a speed of 19.3 m/s and an angle of 32.4 degrees above the ground. Find the speed of the ball
How much work does the electric field do in moving a proton from a point with a potential of +130 V to a point where it is -45 V? Express your answer in joules.
A high-voltage transmission line with a resistance of 0.29 /km carries a current of 1010 A. The line is at a potential of 680 kV at the power station and carries the current to a city located 164 k
To tighten a bolt, you push with a force of 80 Newtons at the end of a wrench handle that is 0.25 meters from the axis of the bolt. a. What torque are you exerting?
A bicycle has wheels with a 30-centimeter radius. If smaller wheels with a 25-centimeter radius are installed, what is the change in linear speed of the bicycle if the wheels rotate at 1 revolution
A proton is placed in a uniform electric field of 2.75 x 103 N/C. Calculate the magnitude of of the electric force felt by the proton, the proton's accerlation, the proton's speed after after 1.00&m
A particular organ pipe can resonate at 264 Hz, 440 Hz and 616 Hz, but not any other frequencies in between. a) What is the fundamental frequency of this pipe.
A baseball thrown from the outfield is released from shoulder height at an initial velocity of 29.4 m/s at an initial angle of 30.0? with respect to the horizontal. What is the maximum vertical disp
John throws a baseball from the outfield from shoulder height, at an initial velocity of 29.4 m/s at an initial angle of 30.0? with respect to the horizontal. The ball is in its trajectory for a tot
A bolt comes loose from underneath an elevator that is moving upward at a speed of 4.5 m/s. The bolt reaches the bottom of the elevator shaft in 2 s. (a) How high up was the elevator when the bolt c
Treat the coffee as though it were pure water and neglect energy exchanges with the environment. The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg. The density
(a) What is the magnitude and direction of the car's acceleration as it slows down?
A car traveling east at 41.9 m/s passes a trooper hiding at the roadside. The driver uniformly reduces his speed to 25.0 m/s in 3.90 s. (a) What is the magnitude and direction of the car's accelerat
A refrigerator has a coefficient of performance of 3. The ice tray compartment is at -20 C, and the room temperature is 22 C. The refrigerator can convert 30 g of water at 22 C to 30 g ice at -20 C
If there were no ventilation, by how much would the temperature of the air rise over a period of 2.0 h due to the metabolism of the people (70 \rm W/person)? Assume the room is initially at 293 {\rm
Over a time interval of 1.81 years, the velocity of a planet orbiting a distant star reverses direction, changing from +20.2 km/s to -17.4 km/s. Find the following values, include the correct algebr
Resistors are assigned a power rating. If the power rating is exceeded significantly, the resistor will overheat and crack. Suppose you have a 8 k , 0.3 watt resistor. What is the maximum voltage it
Objects A and B are both positively charged. Both have a mass of 200 g, but A has twice the charge of B. When A and B are placed 20.0 cm apart, B experiences an electric force of 0.330 N.
Calculate the magnitude E of the net electric field at the origin due to these two point charges. Express your answer in newtons per coulomb to three significant figures.
(a) How much time does the ball spend in the air? (b) What is the longest "hole in one" that the golfer can make, if the ball does not roll when it hits the green?
Find the magnitude of the electric field at a point midway between two charges +24.3 × 10-9 C and +75.5 × 10-9 C separated by a distance of 36.4 cm. The value of the Coulomb constant is 8.
Suppose 4.00 g of hydrogen is separated into electrons and protons. Suppose also the protons are placed at the earth's North Pole and the electrons are placed at the South Pole. What is the resultin
A diamond is underwater. a light ray enters one face of the diamond, then travels at an angle of 30 degree with respect to normal. What is the rays angle of incidence on the diamond?