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An archer shoots an arrow at a 75.0 m distant target, the bull's-eye of which is at same height as the release height of the arrow.
(a) At what angle must the arrow be released to hit the bull's-eye if its initial speed is 38.0 m/s? (Although neglected here, the atmosphere provides significant lift to real arrows.)
Assume that radiant energy from the sun arrives at your location with an intensity of 850 W/m2. In this EM radiation, what are the maximum values of the radiated electric and magnetic fields?
Two particles with masses m and 3m are moving toward each other along the x axis with the same initial speeds Vi. What is the angle theta at which the particle 3m is scattered
Assume all the angles are square for this problem. How much force is required to lift the elbow and the forearm?
A person with mass mp = 70 kg stands on a spinning platform disk with a radius of R = 2.13 m and mass md = 187 kg. What is the final angular velocity of the disk
A rigid tank contains 0.59 mol of oxygen (O2). Find the mass of oxygen that must be withdrawn from the tank to lower the pressure of the gas from 17 atm to 10 atm
An ice skater is spinning with her arms extended out at her sides. She folds in her arms. Explain what happens to her total kinetic energy, moment of inertia.
7.4 kg crate slides on a horizontal surface. The coefficient of kinetic friction between the surface and the crate is 0.365. find the magnitude of the external force acting on the crate
A 82kg person sits on a 3.7kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.3cm in diameter. Find the pressure exerted on the floor by each leg of the chair
Consider the driven, damped harmonic oscillaror discussed in Section 13-8. Calculate the power dissipated by the damping force
Make a stemplot of these data. Is the distribution roughly symmetric, clearly skewed, or neither? About how many home runs did Ruth hit in a typical year? Is his famous 60 home runs in 1927 an outlier?
an electron is accelerated from rest by a potential difference of 350 v. it then enters a uniform magnetic field of
Suppose a 2000 Watt laser beam is concentrated by lens a into a cross-sectional area of about 1 x 10^(-6) cm^2. Find the corresponding irradiance and amplitudes of the E (electric) and B (magnetic) fields there.
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