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One recent study has shown that x rays with a wavelength of 0.0050 nm can produce significant numbers of mutations in human cells. Assuming that the bond energy holding together a water molecule is typical, use table 25.1 in the textbook to estimate how many molecular bonds could be broken with this energy. ___?___ bonds
Three children are riding on the edge of a 1.60-m-radius, 100 kg merry-go-round, spinning at 20.0 rpm. what is the new angular velocity in rpm
The first ionization energy of a gas-phase atom of a particular element is 6.24 x 10^-19 J. What is the maximum wavelength of electromagnetic radiation that could ionize this atom
Explain how race is used as a way to control immigration and manage labor
A radio antenna broadcasts a 1.0 MHz radio wave with 29 kWof power. Assume that the radiation is emitted uniformly in all directions. (a) What is the wave's intensity 35 km from the antenna? I=___?___W/m^2 (b) What is the electric field amplitude at ..
A 1.80 kg block slides on a rough, horizontal surface. The block hits a spring with a speed of 1.80 m/s and compresses it a distance of 11.0 cm before coming to rest. If the coefficient of kinetic friction between the block and the surface is µk = 0...
What is the ratio of the number of moles of air in the heated balloon to the original number of moles of air in the balloon
Explain, in detail, how globalization promotes migration
A potter's wheel moves uniformly from rest to an angular speed of 0.23 rev/s in 35.0 s. Find its angular acceleration in radians per second
What is the molar solubility of lead chromate in 0.10 M HNO3 if the Ksp for PbCrO4 is 2.8 x 10^-13 and Ka2 for H2CrO4 is 3.0 x 10^-7. Note that H2CrO4 is considered to be a strong acid.
In Example 8-10, mass m1 = 2.40 kg is connected to mass m2 = 1.80 kg as shown. Suppose the two masses start from rest and are moving with a speed of 1.95 m/s just before m2 hits the floor. (a) If the coefficient of kinetic friction is µk = 0.320, wha..
A baseball is thrown horizontally at a speed of 43 m/s. When it reaches home plate, what is the horizontal component of its velocity
A 0.150-kg frame, when suspended from a coil spring, stretches the spring 0.070m . A 0.200-kg lump of putty is dropped from rest onto the frame from a height of 30.0cm.Find the maximum distance the frame moves downward from its initial position.
A 13.5 micro F capacitor is connected to a power supply that keeps a constant potential difference of 26.0 V across the plates. By how much did the energy change during the insertion
A 5570kg open train car is rolling on frictionless rails at 23.6m/s when it starts pouring rain. What mass of water has collected in the car
A 5.25 uF capacitor is initially charged to a potential of 15.0 V. It is then connected in series with a 3.55 mH inductor. What is the maximum current in the inductor
the most common use for the nand latch is as a switch debouncer. what is switch bounce and why do we need to eliminate
Under some circumstances, a star can collapse into an extremely dense object made mostly of neutrons and called a neutron star. If the original star rotated once in 35 days, find the angular speed of the neutron star
For tests using a ballistocardiograph, a patient lies on a horizontal platform that is supported on jets of air. determine the recoil velocity
A single force acts on a 2.8 kg particle-like object in such a way that the position of the object as a function of time is given by x = 4.2t - 5.0t2 + 1.1t3, Find the work done on the object by the force
What is the frequency of blue light that has a wavelength of 450 nm and What is the frequency of red light that has a wavelength of 650 nm
A 14 N horizontal force pushes a block weighing 3.0 N against a vertical wall, what is the force on the block from the wall
A 50 gram ball enters a a pendulum with mass 200 g. The pair then swings up to a height of 14.5 cm. Find the initial velocity of the ball before the collision
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