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A 89.0 N grocery cart is pushed 13.0 m along an aisle by a shopper who exerts a constant horizontal force of 40.0 N. If all frictional forces are neglected and the cart starts from rest, what is the
Particle 1 has a velocity v= 2 m/s and a mass m= 2 kg. this particle collides with particle 2 of mass m= 6 kg, which is at rest, and then two particles stick together. the speed of the conglomerate
The molar heat capcities of iron and gold are 25.19 J/(mol degree C) and 25.41 J/(mol degree C), respectively. What is the final temperature of the water and the pieces of metal?
A uniform block of height 0.330 m, floats in glycerin of density 1260 kg/m3. The bottom of the block is 0.2748 m below the surface of the glycerin. What is the density of the block?
Name the three important rays that are used in the ray diagram to determine the image location of an object
An electrically heated coil with a resistance of 60 operated from a 110 V line. A thermoregulator switches the current on and off. What fraction of the time will the current be turned on?
When the 4.6 kg weight is moving with a speed of 1.7 m/s, what is the kinetic energy of the entire system?
A dump truck is being filled with sand. The sand falls straight downward from rest from a height of 3.50 m above the truck bed, and the mass of sand that hits the truck per second is 35.0 kg/s. The
For the following reaction, 5.21 grams of nitrogen gas are allowed to react with with 5.51 grams of hydrogen gas. What is the maximum amount of ammonia that can be formed?
A flight attendant pulls her 67 N flight bag a distance of 367 m along a level airport floor at a constant velocity. The force she exerts is 42 N at an angle of 55° above the horizontal. Find t
An 77 kg quarterback jumps straight up in the air right before throwing a 0.43 kg football horizontally at 15 m/s. How fast will he be moving backward just after releasing the ball?
The osmotic pressure of the glucose solution must equal the osmotic pressure of blood. (R = 0.08206 L·atm/mol·K)
What is the period of this pendulum in the small angle approximation? Answer in units of s.
When responding to sound the human eardrum vibrates about its equilibrium position. Suppose an eardrum is vibrating with an amplitude of 5.75x10-7 m and a maximum speed of 2.96x10-3
Determine the values of delta(x)=(<x^2>-<x>^2)^1/2 and delta(p)=(<p^2>-<p>^2)^1/2 for (a) a particle in a box of length L and (b) a harmonic oscillator. (c) Discuss these wi
An engine absorbs 2224 J from a hot reservoir and expels 471 J to a cold reservoir in each cycle. What is the engine's efficiency?
The Henry's law constant for N2 in water at 37 °C is 8.2 ´ 10-7 M/mm Hg. What is the equilibrium concentration of N2 in water when the partial pressure of N2 is 634 mm Hg?
A 1.40 102 kg crate is being pushed across a horizontal floor by a force P that makes an angle of 30.0° below the horizontal. The coefficient of kinetic friction is 0.250. What should be the mag
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?