Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
At what time does the hour hand point in the same direction as the electric field vector at the center of the dial? (hint: use symmetry)
Two large flat sheets of insulating material are parallel to each other: one has a uniform surface charge density of + while the other has -. Determine the electric field in between as well as outsi
If it is used as the dielectric material in a parallel-plate capacitor, what minimum area should the plates of the capacitor have to obtain a capacitance of 6.10 x 10-2 µF and to ensure that t
After flying for 15 min in a wind blowing 42 km/h at an angle of 24° south of east, an airplane pilot is over a town that is 54 km due north of the starting point. What is the speed of the airpl
A 1.51- battery has internal resistance 1.55 . The battery powers a lightbulb whose filament (when lit) has resistance 8.45 . A. Find the current through the lightbulb.
As a result of this completely inelastic collision, the spring is compressed along its axis and causes the block/bullet to oscillate with an amplitude of 0.200 m. What is the speed of the bullet?
What is the speed of the car just before it lands safely on the other side?
The altitude of a hang glider is increasing at a rate of 6.80 m/s. At the same time, the shadow of the glider moves along the ground at a speed of 15.5 m/s when the sun is directly overhead. Find th
A gymnast of mass 57.0 kg hangs from a vertical rope attached to the ceiling. You can ignore the weight of the rope and assume that the rope does not stretch. Use the value 9.81 m/s^2 for the accel
A 3.8 kg fish swimming 1.3 m/s swallows an absent minded 1.4 kg fish swimming toward it at a velocity that brings both fish to a halt immediately after lunch. What is the velocity v of the smaller f
(a) How much energy (in calories) is transferred to the water as heat? (b) How much to the bowl? (c) What is the original temperature (in Celsius) of the cylinder? The specific heat of water is 1 ca
While riding on a Ferris wheel at the state fair, you are seated 10 m from the axis. If you make a complete rotation every minute, what is your linear speed?
A person is exercising, burning 550 Cal/hr. While doing this exercise, they breath deeply so the volume they take into and out of their lungs is 3 L with each breath. 20% of the air inhaled is oxyge
A small molecule is produced in the center of a spherical cell and diffuses to the cell membrane. If the cell were to triple its radius, by what factor would the time required to diffuse to the memb
Assuming that the permeability of the membrane remains constant, what fraction of the cell's requirement of this nutrient are being met by diffusion after adhering to the surface?
How long will it take a protein of molecular weight equal to 90,000 g/mole to diffuse a distance of 1 μm?
Most of the Sun's energy comes from the proton-proton chain in which four hydrogen nuclei (i.e., protons) fuse into one helium nucleus. (a) Calculate how much mass is "lost" in one proton-proton cha
Assume that the density of blood is 1.05 g/cm3 and that the only reason the pressure changes is due to the weight of the blood.
Assume all the energy in the doughnut can be converted to mechanical energy. (Take 75 kg as the mass of a typical person.)
A baseball leaves a pitcher's hand horizontally at a speed of 160 km/h. The distance to the batter is 18.3 m. Neglect air resistance. a) How long does the ball take to travel the first half of the d
A projectile is launched from ground level at 90 m/s at an angle of 48.0 degrees above the horizontal, and it is subject only to gravity (in free fall, air resistance ignored). aa) What is the time
What is the minimum horizontal force that the student must apply to the textbook to prevent it from falling?
A girl throws a rock horizontally, with a velocity of 10 m/s, from a bridge. It falls 20 m to the water below. How far does the rock travel horizontally before striking the water?
A stone is thrown horizontally with an initial speed of 10 m/s from the edge of a cliff. A stop watch measures the stone's trajectory time from the top of the cliff to the bottom to be 4.3 s. What i