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Relative to a stationary observer, a moving object
A) keeps its same length.B) appears longer than normal.C) appears shorter than normal.D) can do any of the above. It depends on the relative velocity between the observer and the object.E) can do any of the above. It depends on the relative energy between the observer and the object.
A reflecting telescope has a main mirror with fM = 620 mm. If an eyepiece with a magnification of 15 is used, what is the total magnification of the telescope
An oscillator consists of a block of mass 0.600 kg connected to a spring. Find the maximum force exerted on the block from the spring
As an electron in a cold hydrogen atom "flips" to align its magnetic moment with the B-field that surrounds its proton, Calculate the frequency and energy of this photon
A small solid ball is released from rest while fully submerged in a liquid and then its kinetic energy is measured when it has moved 5 cm in the liquid. What is the density of the ball
The gravitational force between two electrons that are 0.97 m apart is 5.76 multiplied by 10-71 N. Find out the mass of an electron. (Use G = 6.67 10-11 N · m2/kg2.)
A guitar string with a mass of 12 g is 80 cm long and attached to the guitar at two points separated by 65 cm. What is the frequency of its fundamental note when it is placed under a tension of 170 N? Answer A) 74 Hz B) 82 Hz C) 93 Hz D) 150 Hz E)..
At their closest approach, Venus & Earth are 4.20 x 10^10m apart. The mass of Venus is 4.87 x 10^24 kg, What is the force exerted by Venus on Earth
What minimum coefficient of kinetic friction is required to bring the crate to a stop over a distance of 5.0 m along the lower surface.
A projectile is fired horizontally from a gun that is 52.0 m above flat ground. The muzzle velocity is 215 m/s. What is its speed as it strikes the ground
Describe the three main layers of the Sun's interior and what do astronomers mean by a "model of the Sun" - Briefly describe how you would determine the absolute magnitude of a nearby star.
A person wears a hearing aid that uniformly increases the intensity level of all audible frequencies of sound by 34.0 dB. What is the intensity delivered to the eardrum
A person can jump a horizontal distance of 2.80m on Earth. How far could the person jump on the moon, where the free-fall acceleration is g/6 and g=9.81 m/s2?
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