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Kicking the skateboard forward at 8.0 m/s. How fast is Dan going as his feet hit the ground? Dan's mass is 60 kg and the skateboard's mass is 5.0 kg.
If a solution has a pH of 7.5, what would its new pH be if the concentration of H3O+ ions in the solution were increased by 100 times? Explain your reasoning.
What is the smallest angle θ between 15.0degree and 90.0degree at which a standing wave exists on the cord??
If the horizontal component of the Earth's magnetic field at the equator is 30 microTeslas, calculate the ratio of the magnetic force on the proton to the gravitational force on it.
Which of the following sequences of organization is likely to be seen in a multicellular organism, going from smallest to largest?
A wooden raft has a mass of 67 kg. When empty it floats in water (density 1000 kg/m3) with 51% of its volume submerged. What mass of sand can be put on the raft without it sinking?
A 67 {rm kg} swimmer climbs onto a Styrofoam block whose density is 160 {rm kg/m^{3}}.If the water level comes right to the top of the Styrofoam, what is the block's volume?
For a substrate to bind to a particular enzyme the size and shape of the substrate must match the what of the enzyme?
A moon orbits a planet because of the gravitational force between them. Likewise, each body also experiences a tidal force due to gravity. Consider how the magnitude of the tidal force changes as th
What minimum coefficient of kinetic friction is required to bring the crate to a stop over a distance of 8.0m along the lower surface.
The kinetic friction coefficient between the lower block and the flat surface is 0.105. A horizontal force F = 95 N pushes against the upper block, causing it to slide. The friction force between th
1. The Rural Development Agency of Upper Camumba has just received a grant that will allow it to electrify the valley of Chinga Creek. Eight villages must be connected to the main power net at minimum
What change in current will accompany a decrease in temperature of one degree Celsius (or one kelvin)? Be careful of the sign of your answer. (c) How much current flows through the wire when the tem
A 290 Kg piano slides 4.0 m down a 30 degree incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is .40
Organelle in eukaryotic involved in the modification and transport of protein
The drug Celebrex selectively inhibits PTGS2 while aspirin and other non-steroidal anti-inflammatory drugs
Relationship between oxygen production and assimilation of carbon?
What happens to a cell that has its paptidoglycan disrupted or removed?
Find the diameter of a cylindrical copper wire of the same length (having resistivity 1.70×10^-8 W×m) that would produce the same resistance.
Fossil evidence indicates that several kinds of flightless dinosaurs possessed feathers. If some of these feather-bearing dinosaurs incubated clutches of eggs in carefully constructed nests, this migh
How do psychological needs and personality traits differ in the manner in which they motivate behavior? Explain your answer.
A 20kg mass, released from rest, slides 6 meters down a frictionless plane inclined at an angle of 30 degrees with the horizontal and strikes a spring of spring constant k = 200 N/M.
Sam, whose mass is 80.0 , takes off down a 50.0 high, 12.0 slope on his jet-powered skis. The skis have a thrust of 180N . Sam's speed at the bottom is 36.0m/s. What is the coefficient of kinetic f
Consider a physical situation in which a particle moves from point A to point B. This process is described from two coordinate systems that are identical except that they have different origins.
The tuning fork creates standing waves in the tube when the total length L is 51.7 cm, 66.2 cm, and 80.7 cm. What is the frequency of the tuning fork? Take the speed of sound in air to be 343 m/s.