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The collision between a hammer and a nail can be considered to be approximately elastic. Estimate the kinetic energy acquired by a 14 g nail when it is struck by a 550 g hammer moving with an initia
A small car collides with a large truck. Is the magnitude of the force experienced by the car greater than, less than, or equal to the magnitude of the force experienced by the truck?
Two nanowires are separated by 1.2 nm as measured by STM. Inside the wires the potential energy is zero, but between the wires the potential energy is greater than the electron's energy by only 1.4
A radar trap operates at a frequency of f=10GHz. The speed of microwaves is v=3.0*10^8 m/s. The microwave beam is aimed at a car approaching at 72km/hr (20m/s). a) Calculate the difference between t
Suppose the clay ball is dropped from the ceiling onto an empty pan. What is the pan's distance from the ceiling when the spring reaches its maximum length?
The radius of the earth is 6380 km and turns once on its axis in 24 hours. What is the radial acceleration if the equator were sitting in a city with latitude 34 degrees? Does this rotation make us
A 2.0 µF capacitor and a 4.0 µF capacitor are connected in series across 1000V. the charged capacitor are then disconnected from the source of connected to each other with terminals of l
An astronaut on the planet Zircon tosses a rock horizontally with a speed of 6.95 m/s. The rock falls through a vertical distance of 1.40 m and lands a horizontal distance of 8.75 m from the astrona
Assume the magnitude of the acceleration is the same during starting and stopping. (a) Determine the weight of the person.
The equation of motion of a particle in vertical SHM is given by y = (20 cm) sin[(0.25 rad/s) t]. What are the particle's (a) displacement, (b) velocity, and (c) acceleration at t = 2.0 s? Also, wha
A 36 kg block slides with an initial speed of 8 m/s up a ramp inclined at an angle of 15o with the horizontal. The coefficient of kinetic friction between the block and the ramp is 0.8. Use energy c
A 1200-turn coil of wire that is 2.3 cm in diameter is in a magnetic field that drops from 0.12 T to 0 in 9.0 ms. The axis of the coil is parallel to the field.
A plane ,driving at an angle of φ with the vertical, releases a projectile at an altitude of 730m. The projectile hits the ground 5.0s after it was released, having travelld a horizontal distan
The spheres come to rest in equilibrium, with their centres 15cm apart. What is the magnitude of the charge on each sphere?
A rocket-powered hockey puck has a thrust of 2.70 N and a total mass of 2.30 kg. It is released from rest on a frictionless table, 2.50 m from the edge of a 2.10 m drop. The front of the rocket is p
A 1.0m length of straight wire carries a current of 21 A in a uniform magnetic field of 60 mT whose direction is at an angle of 39 degrees from the direction of the current. Find the force on the wi
A meteorologist for a TV station is using radar to determine the distance to a cloud. He notes that a time of 0.28ms elapses between the sending and the return of a radar pulse.
Given that the capacitance of the pacemaker is 110 µF and that the battery has a voltage of 9.0 V, what value should the resistance have?
The balls have a glancing collision, not a head-on collision, deflecting the second ball by 90^\circ and sending it north at 1.74 m/s.What is the speed of the first ball after the collision? What is
The cold reservoir for this plant is a pool of water constantly fed with ice from a glacier. If the plant produces 100 MW of electrical energy, what is the rate at which ice is melted?
What is the maximum electric power that could be produced by the plant if it boils the entire creek dry?
A 3-g bullet flying at 420 m/s hits a 2.2-kg aluminum block and embeds itself in the aluminum. After everything has come to equilibrium, how much has the entropy of the aluminum block increased?
Imagine that you have a gas confined in an insulated cylinder by a piston. Imagine that you suddenly push hard on the piston, compressing the gas to one-half its volume.
Batteries are rated in terms of ampere-hours (A h). for example, a battery that can produce a current of 2.00 A for 3.00 h is rated at 6.00 Ah. a.) What is the total energy, in kilowatt-hours, store
After everything has come to equilibrium, by how much has entropy of both water and the copper changed? Explain why the coating of ice that initially forms around the copper is irrelevant.