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A bullet is fired straight up from a gun with a muzzle velocity of 133 m/s. Neglecting air resistance, what will be itsdisplacement after 3.8 s? The acceleration of gravity is 9.8 m/s2.
Describe thinking, intelligence, and creativity in your own words. How are thinking, intelligence, and creativity related?
A ball rolls horizontally off the edge of a tabletop that is 1.05 m high. It strikes the floor 2.80 m away from the edge of the table. What is the initial (horizontal) velocity of the ball? Ignore a
What resistive force (assumed to be constant) does the wood exert on the bullet? How long does it take the bullet to come to rest?
The Sun is a low mass star and so will never have the core fusion reactions of massive stars. Yet, the Sun has iron in its atmosphere, as well as gold, silver and other elements much heavier than i
The balances read 385 and 115 as shown. Both are 20 cm from each end of the meterstick. Assume the meterstick has zweo mass and use torques to calculate the position of the 500g weight on the stick
A 10.80 cm diameter wire coil is initially oriented so that its plane is perpendicular to a magnetic field of 0.680 T pointing up. During the course of 0.160 s, the field is changed to one of 0.250
A proud deep-sea fisherman hangs a fish of mass m from an ideal spring having negligible mass. What is the period of oscillation of the fish if it is pulled down and released?
When it flows perpendicularly with respect to a magnetic field, as in the drawing, electrodes can be used to measure the small voltage that develops accross the vessel. Suppose the speed of the bloo
An inverted image of an object is viewed on a screen from the side facing a converging lens. An opaque card is then introduced covering only the upper half of the lens. What happens to the image on
The dielectric plate is now slowly pulled out of the capacitor, which remains connected to the battery. Find the energy of the capacitor at the moment when the capacitor is half-filled with the diel
A charge of +3.5 microC is placed on the x axis at x = +0.55 m, while a charge of -15 microC is placed at the origin. Calculate the magnitude and direction of the net electric field on the x-axis at
Traveling at an initial speed of 1.5x10^6 m/s a proton enters a region of constant magnetic field of magnitude 1.5 T. If it protons initial velocity vector makes an angle of 30 degrees with the mag
A 1.20 102 g sample of water at 90.0°C is mixed with 1.20 102 g of water at 10.0°C. Assume no heat loss to the surroundings. What is the final temperature of the mixture?
A double slit is illuminated with monochromatic light of wavelenght 6.00 X 10^-2 nm. The m=0 and m=1 bright fringes are separated by 3.0 cm on a screen which is located 4.0 m from the slits. What is
An object has a kinetic energy of 303 J and a momentum of magnitude 22.9 kg·m/s. Find the speed and the mass of the object.
A copper wire has a square cross section 2.7 on a side. The wire is 3.8 long and carries a current of 4.0 . The density of free electrons is 8.5*10^28 m^-3. Find the magnitude of the electric field
A scaffold of mass 49 kg and length 5.8 m is supported in a horizontal position by one vertical cable at each end. A window washer of mass 77 kg stands at a point 1.0 m from one end. What is the ten
At t=0 a grinding wheel has an angular velocity of 20.0 rad/s. It has a constant angular acceleration of 29.0 rad/s^2 until a circuit breaker trips at time t = 2.20 s. From then on, it turns throug
You hold a meterstick horizontally with the same mass suspended at the end. Rank the torque needed to keep the stick steady; from largest to smallest.
At the top of its trajectory, the projectile explodes into two fragments of masses 0.72 kg and 1.28 kg. At 3.8 s after the explosion, the 1.28-kg fragment lands on the ground directly below the poi
The volume of an ideal gas is increased from 1 m3 to 8 m3 while maintaining a constant pressure of 1000 Pa (1 Pa = 1 N/m2). How much work is done by the gas in this expansion?
The coefficient of kinetic friction between the tires and the road is 0.720. What is the speed of the automobile after 1.30 s have elapsed?
A luge and its rider, with a total mass of 82 kg, emerge from a downhill track onto a horizontal straight track with an initial speed of 43 m/s. Assume that they stop with a constant deceleration of
A ceiling fan with 82-cm-diameter blades is turning at 62 rpm. What is the speed of the trip of a blade 10 s after the fan is turned off?