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Compute each part of given question:
Question: A radioactive isotope has a half-life of 76.0 min. A sample is prepared that has an initial activity of 16.0E10 Bq.
Part A: How many radioactive nuclei are initially present in the sample?
Part B: How many are present after 76.0 min?
Part C: How many radioactive nuclei are present 152.0 min after the sample was first prepared?
Part D: What is the activity after 152.0 min?
For some reason I keep getting it wrong I don't know if it's a calculation error. Please show your work so I can see what I'm doing wrong with this above question! Please help.
On a workday the average decibel level of a busy street is 80 dB, with 100 cars passing a given point every minute. If the number of cars is reduced to 45 every minute on a weekend, what is the decibel level of the street.
A 650 kg elevator starts from rest. It moves upward for 3.50 s with stable acceleration until it reaches its cruising speed 1.75 m/s. Calculate average power of elevator motor during this period
1.at this point in the course you have been partially indoctrinated in the young-earthold-earth debate. in modulesweeks
A certain laboratory experiment requires an aluminum wire of length of 22.0 m and a resistance of 2.40 ? at 20.0°C. What diameter wire must be used
An 19.8 g rifle bullet traveling 247 m/s buries itself in a 3.56 kg pendulum hanging on a 2.62 m long string, which makes the pendulum swing upward in an arc. Decide the horizontal component of the pendulum's displacement
question a 10 ohm resistor a 12.0 microfarad capacitor and a 17.0 mh inductor are connected in series with a 155 v
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When water freezes, it expands about 8.95%. What would be the pressure increase inside your automobile's engine block if the water in it froze
A baby elephant is fixed in a mud hole. To help pull it out game keepers use a rope to apply a force A as part a. By itself, though, force A is insufficient.
A spring is compressed by 0.0617 m and is used to launch an object horizontally with a speed of 2.58 m/s. at what angular frequency (in rad/s) would it oscillate
The resistance of a 9 H inductor is 90.0 ohms, What is the final steady current in the circuit
A thin circular disk of radius R rotates with angular speed w, about an axis through the centre of the disc and perpendicular to the plane of the disc.
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