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Binoculars denoted as 7 x 50 have a total magnification of 7 times and objective lenses of 50- mm diameter. What is the focal length of the eyepiece if the objective focal length is 25.5 cm?
A hand grenade is thrown with a speed of v0 30 m/s, and a 60 degree angle with x-axis, just prior to exploding. It breaks into two pieces of equal mass after the explosion. One piece has a final velocity of 40 m/s along x. Find the velocity of t..
Fortunately our environment radiates too. The human body absorbs this radiation with an absorbance of 97.0 percent, How much energy does our body lose in one second
What velocity must be transferred to the spacecraft to crash it into the sun? Assume it is initially in a solar circular orbit, at the same distance from the sun as the Earth. What velocity must be transferred to the spacecraft so that it will escape..
An automobile engine takes in 4000 J of heat and performs 1100 J of mechanical work in each cycle. How much heat is "wasted" in each cycle
If you detect a frequency shift of 195.4Hz in the 4000-Hz bell of a bicycle as it approaches and then leaves you, how fast is the bicycle going
A plane diving with constant speed at an angle of 51.7° with the vertical, releases a package at an altitude of 437 m. The package hits the ground 2.93 s after release. How far horizontally does the package travel.
As a spacecraft approaches a planet, the rocket engines on it are fired (turned on) to slow it down so it will go into orbit around the planet. compute how long (in minutes) must the engines be fired
A gymnast does a one-arm handstand. The humerus, which is the upper arm bone between the elbow and the shoulder joint, What is the compressional strain of the humerus
What initial launch speed is required to allow a projectile to have a range of 300 m if it is launched at an angle of A) 30 above the horizontal B) 45 above the horizontal .C) 60 above the horizontal.
Two objects attract each other gravitationally with a force of 2.3×10-10 when they are 0.65 apart. Their total mass is 5.0 . Find out their individual masses.
A ball is thrown straight up from a height of 1.56m above the ground and reaches a maximum height of 8.35m before falling to the ground. What the calls total time in the air
The binding energy of an electron in a crystal lattice is 1.2 x10^(-4) eV. Use the uncertainty relation to estimate the size of the spread of the electron wave function. How many lattice sites will that include, assuming that the spread is sphericall..
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