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Biological muscle cells can be thought of as nanometres that utilize the chemical energy of ATP to produce mechanical work. Measurements show that the active proteins within a muscle cell (such as myosin and act in) can produce a force of about 7.5 pN and displacements of 8.0 nm. How much work is done with such proteins?
Monochromatic light (λ = 570 nm) passes through two slits and onto a screen 4.0 m away. If two nearby bright fringes are separated with 14 mm, what is the slit spacing? If the slit spacing is reduced by a factor of four, what is the new distance amon..
Ryan throws a tennis ball vertically upward. If the ball returnsto the point of release in 3.5 seconds, what is the speed of the ball as its being released
A wire of 10.0 meter length and a square (1.0 mm x 1.0 mm) cross section is made of a material with a resistivity of 5.0 x 10-8 W•m. Determine what is the new power consumed
In a physics lab, a cube slides down a frictionless incline and elastically strikes another cube at the bottom that is only 1/4 its mass. If the incline is 35 high and the table is 95 off the floor, where does each cube land.
Sam heaves a shot with weight 16-lb straight upward, giving it a constant upward acceleration from rest of 45.7 m/s^2 for a height 65.0 cm. What is the speed of the shot when he releases it
A spy satellite is in circular orbit around Earth. It makesone revolution in 6.01 hours. How high above Earth's surface is the satellite
A 60.0-kg runner expends 300 W of power while running a marathon. determine the volume of bodily fluid (assume it is water) lost per hour
A 54.0 ohm resistor, a 3.00 µF capacitor, and a 0.400 H inductor are connected in series to an 86.0 Volt (rms), 60.0 Hz source. Determine the voltage drop across the RC combination
What is the speed of a free electron that has just barely enough kinetic energy to collisionally ionize a sodium atom in its ground state? What is the speed of a free proton with just enough kinetic energy to collisionally ionize this atom?
A flat sheet of ice has a thickness of 2.0cm. It is on top of a flat sheet of crystalline quartz thathas a thickness of 1.1cm. How far (in cm) would it have to travel invacuum
The power output of he Sun is 3.9 x 10^26 watts. Determine the intensity of the Sun's radiation on he planet Earth
an object 3.28 cm high is placed 11.2 cm in front of a convex mirror with radius of curvature of 8.48 cm. where is the
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