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Q1. A wheel 66.0 cm in diameter accelerates uniformly from 211 rpm to 395 rpm in 7.5 s. How far will a point on the edge of the wheel have travelled in this time?
Q2. The average intensity of sunlight at the top of the earth's atmosphere is 1390 W/m2. What is the most energy that a 30 m multiplied by 55 m solar panel might collect in one hour in this sunlight?
Q3. At a certain facility, gross and background counts are made for the same length of time, and a(alpha)=0.050 and B(beta)=0.025. The background is not accurately known beforehand. Calibration at facility shows that one net count corresponds to a sample activity of 260 Bq. The minimum significant measured activity is 159 Bq. compute the minimum detectable true activity.
Analyse average density of the white dwarf
At what angle of incidence will green light (g = 560 nm) be most strongly reflected? Imagine the film has the minimum thickness that can produce these reflections.
If she is served 200 of coffee at 84 in a well-insulated container, how much ice at 0 should she add to obtain a final temperature of 31.
A child's toy consists of a piece of plastic attached to a spring. The spring is compressed against the floor a distance of 2.0 cm and released. If the spring constant is 85 N/m, what is the magnitude of spring force acting on the toy at the moment i..
Is the collision completely elastic
What is the distance between the centers of the two slits? Describe answer in m.
Find out the magnetic force on the rod
What is the minimum coefficient of friction that will prevent sliding. What should be the highest speed of the car so it can round the curve safely.
A train at rest emits a sound at a frequency of 1045 Hz. An observer in a car travels away from the sound source at a speed of 37 m/s. What is the frequency heard by the observer .
Assume that each person is about the similar distance from the center of the field and can generate the same level of sound intensity. How numerous people are at the game.
What is constant acceleration
What is the size of the frictional force acting on the car
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