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A robot probe drops a camera off the rim of a 402 m high cliff on Mars, where the free-fall acceleration is 3.7 m/s2. Find the velocity with which it hits the ground.
Sulfur-38 has an atomic mass of 38.0 and a half-life of 2.87 hours. How long will it take for 99.99% of a sample of sulfur-38 to decay?
A volume of 80.0mL of H2O is initially at room temperature (22.0 °C). A chilled steel rod at 2.00 °C is placed in the water. If the final temperature of the system is 21.5 °C , what is the mass of t
Suppose you have a semi-infinite solenoid, with radius R and n turns per unit length carrying a current I, running along the z-axis and extending from z = 0 to z = -∞. What is the magnetic fie
copper metal (molar mass 63.55 g mol-1) fell by 7.51 K when the copper block released 13.6 J of heat. What is the mass of the copper block?
What is the magnitude of the external force necessary to hold a 2.0 kg cart motionless at the top of a 2.0m high incline which is 30 degrees?
An unknown compound contains only carbon, hydrogen, and oxygen (C_xH_yO_z). How many moles of hydrogen, H, were in the original sample?
The sudden opening of the epiglottis and vocal cords releases this air explosively. Just prior to this release, what is the approximate pressure of the gas inside the lungs?
A 12.0 g bullet is fired horizontally into a 102 g wooden block that is initially at rest on a frictionless horizontal surface and connected to a spring having spring constant 154 N/m. The bullet b
When the molten liquid solidified, the melting point was re-determined and found to be 131oC. Give a possible explanation for this discrepancy.
A force is applied to a 3 kg mass and produces 5.4 m/s2 acceleration. What acceleration would be produced by the same force applied to a 6.9 kg mass?
How many milliliters of a stock solution of 6.20 M HNO3 would you have to use to prepare 0.200L of 0.530 M HNO3?
What is the acceleration experienced by the tip of the 1.5 cm long sweep second hand on your wrist watch? In M/s^2
The equilibrium constant of this reaction is K = 1.0, and that the initial pressure of A was 1 atm, what change in the gas pressure in the reaction chamber do you expect?
A camel sets out to cross the desert, which is 21.3 km wide in the north-south direction. The camel walks at the uniform speed 4.7 km/hr along a straight line in the direction 47.7? north of East (o
What is the acceleration of a falling crate (mass including parachute 132 kg) when the upward force or air resistance is one-fourth its weight
A 78 L sample of dry air is cooled from 138°C to -33°C while the pressure is maintained at 2.85 atm. What is the final volume?
Suzie (of mass 60 kg) is roller-blading down the sidewalk going 18 miles per hour. She notices a group of workers down the walkway who have unexpectedly blocked her path, and she makes a quick stop
The gas phase reaction 2A → P in which the product, P is formed when two A molecules collide. What does it mean when it said "increase by a factor of 9"? Where is 9 comes from?
Our Sun rotates about the center of the Galaxy (MG 4. 1041 kg) at a distance of about 3. 104 light-years (1 ly = 3. 108 multiplied by 3.15 107 s/y multiplied by 1 y). What is the period of our orbi
How much force must you exert to keep the pole motionless in a horizontal position?
A penny of mass 3.1 g rests on a small 20 g block supported by a spinning disk. The coefficients of friction between the block and the disk are 0.75 (static) and 0.64 (kinetic) while those for the
When 125 g of copper reacts with 34 g of oxygen gas to form copper (II) oxide, no copper or oxygen is left over. How much copper (II) oxide is produced?
When synthesizing epoxy resin, amines are used as the curing agent. Amines react rather quickly with epoxy groups. How might you slow the reaction down? How might you speed it up?
An 854-kg (1887 lb) dragster, starting from rest, attains a speed of 27.1 m/s (60.7 mph) in 0.59 s. Find the average acceleration of the dragster during this time interval.