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1. It is believed that a ring of old stars around the Milky Waymight have been formed by a previous merger of twoGalaxies.A TrueB False
2. What name is given to a galaxy with a smooth distribution ofbrightness and a round, spherical shape?A SBaB SaC E0D E7
3. There is little or no interstellar dust or gas in which of the following galaxy types?A Spirals.B Barred spirals.C Ellipticals.D Irregulars.
4. Dwarf galaxies contain only dwarf stars.A TrueB False
5. According to the Hubble classification scheme, an E3galaxyA has a shortercentral bar in its disk than an E5 galaxy.B has more tightly woundspiral arms than an E5 galaxy.C is rounder-looking thanan E5 galaxy.D is flatter-looking thanan E5 galaxy.
6. Who developed the "tuning-fork" diagram connecting the different shapes of elliptical and spiral galaxies?A EdwinHubble.B StephenHawking.C EjnarHertzsprung.D MartinSchwarzschild.
A bar of lead (bar A) is in thermal contact with a bar of silver (bar B) of the same length and area. Find the temperature at the junction when the energy flow reaches a steady state
Calculate the velocity of a 50.0g steel ball shot from a slingshot with a 120N/m spring constant when pulled back 35cm and released
Blue light of frequency 6.5 1014 Hz falls on the surface of potassium, which has a work function of 2.26 eV. Find the maximum kinetic energy of emitted electrons.
A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. Find the speed of the wagon after the rock is thrown directly forward in one case and directly backward in another
You sing into a well and find that the well resonates at frequencies of 187 Hz and 221 Hz with no resonances between these two frequencies. What is the depth of the well
1. Chameleons use their tongues to catch their prey. Their tongues typically accelerate at 250 m/s2 for up to 20 ms, then they travel at constant speed for a further 30 ms. During this total duration, of acceleration plus constant motion, of 5..
A car of mass = 800 travelling at 45.0 enters a banked turn covered with ice. The road is banked at an angle, and there is no friction between the road and the car's tires. What is the radius of the turn if = 20.0 (Assume the car continues in unif..
questionafter being kidnapped and placed in the trunk of a car you find out you are able to pry open the trunk. luckily
A 0.11-kg balloon is filled with helium (density = 0.179 kg/m3). If the balloon is a sphere with a radius of 4.2 m, what is the maximum weight it can lift
Two particles are at the same point at the same time, moving in the same direction. Par-ticle A has an initial velocity of 7.7 m/sandnan acceleration of 2.5 m/s2. Particle B has an initial velocityof 3.4 m/s and an acceleration of 5 m/s2.
An objects angular momentum changes by 10 kgm^2/s in 2.0 s. What magnitude average torgue acted on this object
Two rods, one of aluminum and the other of copper, are joinedend to end. find the temperature of the aluminium copper interface
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