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An open railroad car of mass 2404 kg is coasting with an initial speed of 18 m/s on a frictionless, horizontal track. It is raining, and water begins to accumulate in the car. After some time, it is found that the speed of the car is only 10 m/s. How much water (in kilograms) has accumulated in the car?
A scintillator absorbs an incident flux of 5 MeV alpha particles that totals 10^6 particles/s, estimate the expected signal from the photodiode
A spool of thread has an average diameter of 1.8 cm. If the spool contains 39.2 m of thread, how many turns of thread are on the spool
a krypton laser produces a cylindrical red laser beam 2.0 mm in diameter with 2.0 w of power. what is the light
An electron is orbiting a proton under the Coulomb force in a hydrogen atom at a radius of 0.52 × 10-10 m
The large blade of a helicopter is rotating in a horizontal circle. The length of the blade is 6.64 m, Find the ratio of the centripetal acceleration at the end of the blade to that which exists at a point
What is the repulsive force between two pith balls that are 12.0 cm apart and have equal charges of -26.0 nC?
Consider the H beta line of the Balmer series for hydrogen. Calculate the photon energy for this H beta line
At time t=0 a grinding wheel has an angular velocity of 25.0rad/s . It has a constant angular acceleration of 35.0rad/s^2 until a circuit breaker trips at time t = 2.00s. What was the wheel's angular acceleration as it slowed down
Radiotelescopes are designed to observe 21-cmwaves emitted by atomic hydrogen gas. Estimate the distance to this galaxy
A piece of iron is heated to 900?C. What is the median wavelength of its blackbody radiation
The coefficient of friction is 0.3. The Initial speed is 3 m/s. How far does it slide down along the path before it comes to rest
Figure 25-32 shows a circuit section of four air-filled capacitors that is connected to a larger circuit. The graph belowthe section shows the electric potential V(x) as afunction of position x along the lower part of thesection, through capacitor..
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