An automobile manufacturer claims that its product will, starting from rest, travel 0.40 km in 9.0 s. What is the magnitude of the constant acceleration required to do this?
a. 9.9 m/s2
b. 8.9 m/s2
c. 6.6 m/s2
d. 5.6 m/s2
e. 4.6 m/s2
a
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Equilibrium: To determine the location of the center of mass (or center of gravity) of a car, the car is driven over a scale on a horizontal floor. When the front wheels are over the scale, the weight recorded by the scale is 5800 N, and when the rear wheels are over the scale, the scale reads 6500 N. The distance between the front and rear wheels is measured to be 3.20 m. How far behind the front wheels is the center of mass located?
A. 0.845 m B. 1.50 m C. 1.59 m D. 1.69 m E. 1.72 m
Why is Earth's inner core solid?
A. due to the tremendous pressure of overlying material B. due to extremely high temperature C. due to the spinning of earth D. Earth formed by liquid material piling on top of a solid sphere.
An isotope of fluorine has 9 protons and 10 neutrons. What are the atomic number and atomic weight of this fluorine? If we added a proton to this fluorine nucleus, would the result still be fluorine? What if we added a neutron instead? Explain
What will be an ideal response?
A circular window 30 cm in diameter in a submarine can withstand a net maximum force of 5.20 × 105 N without damage
What is the maximum depth in a fresh-water lake to which the submarine can go without damaging the window? The density of fresh water is 1000 kg/m3. A) 680 m B) 740 m C) 1200 m D) 750 m