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Q1. A home fragment found in a cave believed to have been inhabited by early humans contains 0.21 times as much14C as an equal amount of carbon in the atmosphere when the organism containing the bone died. Find the approximate age of the fragment. Half life of 14C is 5730 Years.
Q2. Compare to a particles with the same energy, β particles that can much more easily penetrate through matter. Why is this?
Q3. In what ways do photons resemble other particles such as electrons? In what ways do they differ? Do photons have mass? Do they have electric charge? Can they be accelerated? What mechanical properties they have?
How much energy transfer as the reason of a temperature difference was there from the stove into the system consisting of the water plus the pan.
a light ray traveling in a slab of crown glass surrounded by air. the ray is incident on the right surface at an angle
A roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r. A passenger feels the seat of the car pushing upward on her with a force equal to twice her weight as she goes through the dip.
To get to a concert in time, a harpsichordist has to drive 123 miles in 2.03 hours. If he drove at an average speed of 55.0 mi/h in a due west direction for the first 1.22 h, what must be his average speed
The work function of a certain metal is 3.00 eV. What is the kinetic energy of a photoelectric in both "J" and "eV" for an incident photon of wavelength 400.0 nm
Two positive point charges, each 17? C, lie along the x-axis at x = –0.12m and x = +0.12m.
A 28.0-kg block is connected to an empty 2.46-kgbucket by a cord running over a frictionless pulley. Calculate the mass of sand added to the bucket
question a proton charge 1.6 x 10-19 travels through a magnetic field of 1.78t with a velocity of 2.3 x 105 msec. what
A cannon ball is fired from ground level with a speed of 60.0 m/s at an angle of 58 deg. above the horizontal. what is the speed of the cannon ball when it is directly above the wall
A tennis ball of mass 57 g travels with velocity m/s toward a wall. After bouncing off the wall, the tennis ball is observed to be traveling with velocity m/s.
question1submarine when at rest underwater uses a sonar device that sends 20 khz sound pulses downward from bottom of
consider the following situation. a block of mass 20 kg is initially at rest on an inclined that makes an angle of 37
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