Category Archives:
Essay Writing Help

Collision- physics question Experimental tests have shown that bone will rupture if it is subjected to a force density of 1.00×108N/m2 . Suppose a 75.0kg person carelessly roller-skates into an overhead metal beam that hits his forehead and completely stops his forward motion. If the area of contact with the person’s forehead is 1.50cm2 , […]

xf = xita + vxitb + axtc For what values of a, b, and c is this equation dimensionally correct? Example 1.1 Analysis of an Equation Dimensions and Units of Four Derived Quantities Quantity Area Volume Speed Acceleration Dimensions L2 L3 L/T L/T2 SI units m2 m3 m/s m/s2 U.S. customary units ft2 ft3 ft/s […]

A satellite has an elliptical orbit around the earth A satellite has an elliptical orbit around the earth with one focus at the earth’s center, E. The earth’s radius is 4000 miles, the highest point that the satellite is from the surface of the earth is 800 miles, and the lowest is 200 miles. Find […]

phy gravitation The two stars in a certain binary star system move in circular orbits. The first star, Alpha, has an orbital speed of 36.0km/s. The second star, Beta, has an orbital speed of 12.0km/s. The orbital period is 137d. Is this the question you were looking for? If so, place your order here to […]

problem 3.18 The position of a particular particle as a function of time is given by r⃗ = ( 9.60t⋅i^ + 8.85j^ – 1.00t2⋅k^)m, where t is in seconds. What is the average velocity of the particle between t=1.00 s and t=3.00 s? Express your answer in terms of the unit vectors i^,j^, and k^. […]

Circuit components If the switch were kept closed during the procedures and the circuit components heated up, how would this affect the measurements? A.) Increase the current and increase the resistance B.) Increase the current and decrease the resistance C.) Decrease the current and increase the resistance D.) Decrease the current and decrease the resistance […]

What beat frequency In certain ranges of a piano keyboard, more than one string is tuned to the same note to provide extra loudness. For example, the note at 1.10 102 Hz has two strings at this frequency. If one string slips from its normal tension of 5.90 102 N to 5.40 102 N, what […]

phsics 2011 A package is dropped from a helicopter that is descending steadily at a speed v0. After t seconds have elapsed, consider the following. (a) What is the speed of the package in terms of v0, g, and t? (Use any variable or symbol stated above as necessary. Let down be positive.) (b) What […]

Physics question????? Bob has just finished climbing a sheer cliff above a beach, and wants to figure out how high he climbed. All he has to use, however, is a baseball, a stopwatch, and a friend on the ground below with a long measuring tape. Bob is a pitcher, and knows that the fastest he […]

Uniform Solid Disk A uniform solid disk with a mass of 24.3kg and a radius of 0.314 m is free to rotate about a frictionless axle. Forces of 90.0 N and 125 N are applied to the disk, as the drawing illustrates. (a) What is the net torque produced by the two forces? Nm (b) […]