1. A bullet leaves a 24 inch rifle barrel at 900 ft/s. What was its acceleration...
1. A bullet leaves a 24 inch rifle barrel at 900 ft/s. What was its acceleration and time in the barrel? 2. A train has an initial velocity of 54 mph. 4 minutes later it slows to a stop at an intersection. What is the acceleration? How far did it travel before coming to a stop?
Two strings, 1 and 2, have the same length, and it takes the same amount of...
Two strings, 1 and 2, have the same length, and it takes the same amount of time for a wave pulse to travel the length of each string. The tension in string 1 is 134 N and it has a linear density of 1.34 g/m. If the tension in string 2 is 180 N, what is its linear density?
A string of length 2.83 m and linear mass density 0.500 g/m, and a string of...
A string of length 2.83 m and linear mass density 0.500 g/m, and a string of length 3.09 m and linear mass density 0.242 g/m, are tied together and stretched to a tension of 150 N. How long, in seconds, will it take a transverse wave to travel the entire length of the two wires?
A helicopter driving at an angle of 25 degrees with the vertical drops a package at...
A helicopter driving at an angle of 25 degrees with the vertical drops a package at an altitude of 250 m. The projectile hits the ground 5.4s after released. (a) What is the speed of the helicopter (b) How far did the projectile travel horizontally during its flight? (c) What is the velocity of the projectile just before impact
How long does it take electrons to get from a car battery to the starting motor?...
How long does it take electrons to get from a car battery to the starting motor? Assume the current is 310 A and the electrons travel through a copper wire with cross-sectional area 0.22 cm2 and length 0.81 m. The number of charge carriers per unit volume is 8.49·1028 m-3.
The distance between two successive maxima of a certain transverse wave is 1.56 m. Suppose a...
The distance between two successive maxima of a certain transverse wave is 1.56 m. Suppose a maximum passes some point at t = 0, and eight more crests, or maxima, pass that given point along the direction of travel in the next 15.8 s. Calculate the wave speed. Answer in units of m/s.
QUESTION 59 Why does a good night's sleep matter? A. It minimizes stress. B. It decreases...
QUESTION 59 Why does a good night's sleep matter? A. It minimizes stress. B. It decreases risk of heart disease, diabetes, and cancer. C. It reduces the risk of depression and of being overweight. D. It improves memory. E. All of the above 1 points QUESTION 60 Why do we need to eat a variety of foods? A. No...
Based on the information in the Mini-Case “Malthus and the Green Revolution” how did the average...
Based on the
information in the Mini-Case “Malthus and the Green Revolution” how
did the average product of labor in food production change over
time?
Mini-Case 8, Thomas Malthus-a clergyman and professor of political economy Malthus and the Green Revolution predicted that (unchecked) population would grow more rapidly than food pro- duction because the quantity of land was fixed. The...
The drawing shows two identical systems of objects; each consistsof the same three small balls connected...
The drawing shows two identical systems of objects; each consistsof
the same three small balls connected by massless rods. In
bothsystems the axis is perpendicular to the page, but it is
located ata different place, as shown. The same force ofmagnitude
F is applied to the same ball in eachsystem (see the
drawing). The masses of the ballsare m1 =...
12) Consider a party balloon filled with helium with a small mass m hanging from it,...
12) Consider a party balloon filled with helium with a small mass m hanging from it, as depicted in Figure 2. The balloon can be approximated as a sphere with volume V = 0.035 m. The mass of the rubber and string (i.e. the balloon's mass when it is not filled with helium) is 0.0025 kg. a) If the balloon...
Based on the
information in the Mini-Case “Malthus and the Green Revolution” how
did the average product of labor in food production change over
time?
Mini-Case 8, Thomas Malthus-a clergyman and professor of political economy Malthus and the Green Revolution predicted that (unchecked) population would grow more rapidly than food pro- duction because the quantity of land was fixed. The...
The drawing shows two identical systems of objects; each consistsof
the same three small balls connected by massless rods. In
bothsystems the axis is perpendicular to the page, but it is
located ata different place, as shown. The same force ofmagnitude
F is applied to the same ball in eachsystem (see the
drawing). The masses of the ballsare m1 =...
12) Consider a party balloon filled with helium with a small mass m hanging from it, as depicted in Figure 2. The balloon can be approximated as a sphere with volume V = 0.035 m. The mass of the rubber and string (i.e. the balloon's mass when it is not filled with helium) is 0.0025 kg. a) If the balloon...
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