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A solid concrete block weighs 250 N and is resting on the ground. Its dimensions are 0.400 m x 0.190 m x 0.0880 m. What is the smallest number of whole bricks
A baseball (m = 149 g) approaches a bat horizontally at a speed of 42.6 m/s (95 mi/h) and is hit straight back at a speed of 47.1 m/s (105 mi/h). compute the average force exerted on the ball by the
Two identical capacitors are connected in parallel to an ac generator that has a frequency of 579 Hz and produces a voltage of 24 V. What is the capacitance of each capacitor
A student is reading a lecture written on a blackboard. The lenses in her eyes have a refractive power of 69.40 diopters, How far (in meters) is the blackboard from her eyes
What would be the change in pressure in a sealed 10.0 L vessel due to the formation of N2 gas when 32.0 g of NH4NO2 decomposes at 25 degrees C
Two masses, M1=20.00 kg and M2=12.00 kg, are 50.00 m apart. Find the location of center of mass of the two masses
Describe the difference between an ionic bond and a covalent bond. Give an example of a compound that exhibits ionic bonding. Give an example of a compound that exhibits a covalent bond.
Which of the following compounds would have the lowest boiling point. a) CH4 b) HF C)K2O D) NO2 E) LiCl
a wire is carrying a current in the -x direction. What is the direction of the uniform magnetic field such that the magnetic force is maximized
What is the final temperature after 336J of heat energy is removed from 25.0g of Water at 19.6C
The image of a very distant car is located 17 cm behind a convex mirror. what is the radius of curvature of the mirror
Two balls are approaching each other head-on. Their velocities are +14.6 and -8.88 m/s. Determine the velocity of the center of mass of the two balls
A cylinder, with a piston pressing down with a constant pressure, is filled with 2.10 moles of a gas (n1), and its volume is 50.0 L (v1). If 0.500 mole of gas leak out, and the pressure and temperat
An automobile has a mass of 1710 kg and a velocity of 23.2 m/s. It makes a rear-end collision with a stationary car whose mass is 2470 kg. What is the velocity of the two cars just after the collisio
A molecule consists of two atoms. How far from the first atom is the center of mass of the molecule
Consider 4.90 L of a gas at 365 mmHg and 20. degrees celisus . If the container is compressed to 3.00 L and the temperature is increased to 40.degrees celisus , what is the new pressure, P2, inside
For tests using a ballistocardiograph, a patient lies on a horizontal platform that is supported on jets of air. determine the recoil velocity
An inductor has an inductance of 0.082 H. The voltage across this inductor is 45 V, What is the current in the inductor
2CaH18(g) + 9O2(g) > 2Ca2(g) + 18H2O(g) Enter the coefficients for each compound in order, separated by commas. For example, 1,2,3,4 would indicate one mole of C8H18, two moles of O2, three moles
A source vibrating at constant frequency generates a sinusoidal wave on a string under constant tension. by what factor does the amplitude change
Calculate the length of a pipe that has a fundamental frequency of 694 Hz. (Take the speed of sound in air to be 343 m/s.)
My balanced equation is: 3HBr(aq) + Al(OH)3 (s) ----> AlBr3 (aq) + 3H2O(l) My question is: What are the spectator ions
At a rock concert, the sound intensity 1.0 m in front of the bank of loudspeakers is 0.10 W/m^2. How much energy is transferred to each eardrum in one second
The initial volume of the balloon is 5.00 L, and the pressure is 760 mmHg. The balloon ascends to an altitude of 20 km, where the pressure is 76.0 mmHg and the temperature is -50 degrees celsius. Wh
A ball is thrown initial 10m/s at 30 degree above horizon from a platform of 20 meter above the ground. calculate the maximum height reached by the ball