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You are arguing over a cell phone while trailing an unmarked police car by 26.0 m; both your car and the police car are traveling at 120 km/h. Your argument diverts your attention from the police car for 2.0 s (long enough for you to look at the phone and yell,"I won't do that!"). At the beginning of that 2.0 s, the police officer begins braking suddenly at 5.00 m/s2. (a) What is the separation between the two cars when your attention finally returns? Suppose that you take another 0.500 s to realize your danger and begin braking. (b) If you too brake at 5.00 m/s2, what is your speed (in km/h) when you hit the police car?
In a region where there is an electric field, the electric forces do +8.00x 10^-19 J of work on an electron as it moves from point X to point Y.What is the potential difference, VY - VX, between point Y and point X?
Consider a region of space with volume 32 mm3. Suppose the energy stored in the electric field of that particular region of space is 87 J. evaluate the average electric field strength in this region
An ac generator with a frequency of 1.44kHz and an rms voltage of 21.2V is connected in series with a 1.90 kiloohms resistor, What is the power factor for this circuit
Given you have a 1000 kg automobile with an Otto cycle engine, compression ratio of 10. estimate the real engine losses due to friction and drag
A merry-go-round is stationary. A dog is running on the ground just outside its circumference, moving with a constant angular speed of 0.775 rad/s. At what time will the dog reach the bone
An unknown material has a normal melting/freezing point of -26.3 ° C, and the liquid phase has a specific heat capacity of 160 J/(kg · C °). What is the latent heat of fusion of the unknown material
A girl with a mass of 40 kg is swinging from a rope with a length of 3.2 m. What is the frequency of her swinging
A uniform 3.15-kg rope 25.6 m long lies on the ground at the top of a vertical cliff. What was the change in potential energy of the rope during this maneuver
20g of Uranium Carbide (UC) of density 13.6 g/cm^3 is mixed with 15g of uranium dioxide of density 11.2 g/cm^3, Determine the atom densities of U-235 and U-238 in the fuel mixture
The activity of a freshly prepared radioactive sample is 1010 disintegrations per second, whose mean life is 109 s. find the mass (in mg) of the radioactive sample
A 75-W, 120-V bulb is connected in parallel with a35-W, 120-V bulb. What is the net resistance
Suggest a proper answer with proof for if frequency of incident radiation is doubled, what will be the effect on maximum kinetic energy of photo electrons
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