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hildren are playing on a vertical slide that is 10m high. If humps were added to this slide, but the height remained constant, how would this effect the final speed?
In coming to a stop, a car leaves skid marks 76 m long on the highway. Assuming a deceleration of 6.50 m/s2, estimate the speed of the car just before braking.
In order for a photon to eject an electron from a metal surface via the photoelectric effect, the photon's [choose the best answer]
The building's roof is 28.0 m above the level ground. (a) At what time does the ball hit the ground? (b) At what horizontal distance does the ball hit the ground?
Then you turn back around and hurry on to class. If your speed is a constant 0.95 m/s as you are walking (both directions), what is your average velocity from the time you leave Dale Hall to the tim
A mass is trapped on the x-axis. Its potential energy is given by U=-2x^3 -3x^2 +12x. Where x is i meters and U is in joules. A) Determine an expression for the force that acts on the mass as a functi
If 61.5 L of oxygen at 18C and an absolute pressure of 2.45 atm are compressed to 48.8L and at the same time the temperature is raised to 56 degrees C, what will the new pressure be?
Calculate (a) the partial pressure of nitrogen and (b) the mole fraction of each gas in the original mixture.
Find the pressure exerted on the floor by each leg. The acceleration of gravity is 9.8 m/s2 .
The tackler holds onto the receiver, and the two move off together with a velocity of +1.6 m/s. The mass of the tackler is 115 kg. Assuming that momentum is conserved, find the mass of the receiver.
A thin rod is pivoted about its center. The rod's mass is 5.0 kg, and its moment of inertia is 5.4 kg m2. What is the length of the rod? The length is _____ m
Question: A rope can withstand 1.0 x 10^3 N of tension. If the rope is being used to pull a 10.0-kg package across a c=frictionless surface, what is the greatest acceleration that will not break th
A uniform 1200N beam that is 3.50 m long is suspended horizontally by two vertical wires at its ends. A small but dense 550 N weight is placed on the beam 2.00m from one end. Find the tensions, A an
The spring has a spring constant of 154 N/m and the spring is compressed a distance of 2.5 m. The masses are then released. How much energy was stored in the spring?
When a 9.80 kg mass is placed on top of a vertical spring, the spring compresses 4.00 cm. What would the compression of the spring (in cm) be if the spring-mass system was placed in an elevator that
Springs, having stiffness k, 2k, 4k, 8k, 16k, and so on are tied in series. Find the effective stiffness of the system.
Joe Walks 4 blocks north, then turns east and walks 1 block. He finally walks 3 blocks south. How far is Joe away from his origin?
A fireworks rocket has a mass of 560 g and its initial acceleration is 6.0 m s-2 when launched vertically upwards. a(i) Calculate the magnitude of the initial thrust of the rocket.
A geothermal power plant uses geothermal water extracted at 160oC at a rate of 440 kg/s as the heat source and produces 22 MW of net power. IF enviroment temp if 25oC the actual rate of heat rejecti
A 25g bullet pierces a sand bag 27cm thick. If the initial bullet velocity was 64 m/s and it emerged from the sandbag with 35m/s, what is the magnitude of the friction force(assuming it to be consta
A 74.8 g sample of copper at 143.2°C is added to an insulated vessel containing 165 mL of glycerol, C3H8O3 (l) (d = 1.26 g/mL), at 24.8°C. The final temperature is 31.1°C. The specific hea
Question: How much heat is released when a mixture containing 23.0 g CS2 and 23.0 g Cl2 reacts by the following equation? CS2(g) + 3Cl2(g) ---> S2Cl2(g) + CCl4(g) delta H= -230 kJ
The CGS unit for measuring the viscosity of a liquid is the poise (P): 1 P = 1 g/(s·cm). The SI unit for viscosity is the kg/(s·m). The viscosity of water at 0 C is 1.95×10-3 kg/
Write a nuclear reaction for the neutron-induced fission of U-235 to produce Te-137 and Zr-87? How many neutrons are produced in the reaction?
The mean diameters of X and Y, two planets in the same solar system, are 6.4 x 103 km and 1.2 x 104 km, respectively. The mass of X is 0.25 times the mass of Y. The value of g on Y is 8.8 m/s2. The ma