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Question1
At rest, a light source emits 532 nm light.
(a) As it moves along a line connecting it and Earth, observers on Earth measure the wavelength to be 412 nm. What is the sources velocity and direction?
(b)Was it to move in opposite direction at the same speed, what wavelength would be seen?
(c)Was it to circle earth at the similar speed what wavelength would be seen?
Question2
A cube of ice is taken from the freezer at -5.5and placed in a 110 aluminium calorimeter filled with 305 of water at room temperature of 20.0. The last situation is observed to be all water at 15.0. What was the mass of cube?
Question3
The discovery of a star orbiting the center of our galaxy with a 15-year period has led to the result that mass of the giant black hole at the center of our galaxy is about 3 million times that of the Sun. with ratios; compute the semi major axis of the star’s orbit. Translate the answer to light-years.
An FM radio station broadcasts electromagnetic waves at a frequency of 550 kHz. Calculate the wavelength of the waves.
Julie drives 100 mi to grandmother's house. On the way, Julie drives half the distance at 40 mph, How long does the return trip take
A large tank is filled with methane gas at a concentration of 0.690 kg/m3. What is the cross-sectional area of the pipe
Given two vectors a = 3.1i -3.4j and b =6.7i+8.7j, What is the magnitude (in m) of the vector a, Find the direction (in ° = deg) of the vector a, Find the magnitude of the vector b
Suppose 1.0 mol of a monatomic ideal gas initially at 10 L and 348 K is heated at constant volume to 696 K, What is the efficiency of the cycle
A 45 dB sound wave strikes an eardrum whose area is 4.1 × 10-5 m2. How much energy is received by the eardrum per second
the two stars in a binary star system have masses 1.7 x 10 ^ 30 kg and 5.8 x 10 ^ 30kg. They are separated by 2.1 x 10 ^ 12m, What is the speed of the heaviest star
A bungee cord is stretched between two poles with a force of 447 N, What is the velocity of a wave on this bungee cord
What is the pressure (in kPa) exerted by an object that has a base which is 2cm by 4cm nd a weight of 45N.
A gardener feels it is taking him excessively long to water a garden with a 0.952cm diameter hose. By what factor will his time be shortened, if he uses a 1.58 cm diameter hose.
The average lifetime of a muon is about 2 µs. Estimate the minimum uncertainty in the rest energy of a muon
03.3 A boat is heading upstream when a float is dropped overboard and carried downstream. What is the boat's speed in still water?
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