40. The Doppler Effect in light is an important tool in astronomy. Receding distant galaxies from the earth show up a Doppler shift in form of cosmic rays. that is not changing with time. towards the blue end of the spectrum or blue shift. towards the red end of the spectrum or re shift

Q: 18. A storage tank 30 m high is filled with gasoline. (a) Find the gauge pressure at the bottom of t...

A: Given : Height of the tank = 30 m  Length of the tank = 0.5 m  Breadth of the tank = 0.5 m

Q: A student drops a pebble from the edge of a vertical cliff. The pebble hits the ground 4 s after it ...

A: Given: The initial speed of the pebble is 0 m/s. The time taken by the object to reach the ground is...

Q: In the figure, block A has a mass of 4.00 kg. It rests on a smooth horizontal table and is connected...

A:

Q: A negative charge enters a uniform magnetic field as shown. What is the direction of the magnetic fo...

A:

Q: A stone accidentally falls from rest from the edge of a 35-m-high building. When the stone is 14m ab...

A: Time taken by the stone to reach a height of 14m above the ground is given by:- h=gt22(35-14)=9.8×t2...

Q: satellites are in circular orbits around Jupiter. One, with orbital radius r, makes one revolution e...

A: Given  R1 = r  T1 = 36.6 h  R2 = 4 r  T2 = ? 

Q: 1.10 The pressure rise Ap associated with wind hitting a win- dow of a building can be estimated usi...

A: Given: ρ=1.2 kg/m3v=60 mph=26.8224 m/s       Converting mph to m/s by dividing the value by 2.237

Q: 1- A 2 kg block on a spring undergoes simple harmonic motion. Its position can be represented by x =...

A:

Q: How long does it take light to travel through a 2.2-mm-thick piece of window glass? Express your ans...

A:

Q: A student drops a pebble from the edge of a vertical cliff. The pebble hits the ground 4 s after it ...

A: Given : Time (t) = 4 s  Gravity (g) = 10 m/s2.........(constant value)

Q: A charge q = 2.00 µC is placed at the origin in a region where there is already a uniform electric f...

A:

Q: A 0.50-mm-wide slit is illuminated by light of wavelength 500 nm. What is the width of the central m...

A: Given: The width of the slit is 0.5 mm. The wavelength of the light is 500 nm. The distance of the s...

Q: 14. The human body can survive an acceleration trauma incident (sudden stop) if the magnitude of the...

A: According to Bartleby guidelines, I can answer the very first question in case of multiple types. If...

Q: Problem 9 A 0.35 kg plastic cart and a 18 kg steel cart can both roll without friction on a horizont...

A: Given that, Mass of the plastic cart (mp)= 0.35 kg Mass of the steel cart (ms)= 18 kg Let F be the a...

Q: A pitcher bestows a power of P = 206 W to a baseball of mass m = 0.095 kg for a period of t = 0.28 s...

A:

Q: The distance between two charges q1=+2 microCoulombs and q2=+6 microCoulombs is 15cm. Calculate the ...

A: first charge (q1) = 2μCsecond charge (q2) = 6μC distance between two charges (D) = 15 cm Let the poi...

Q: 1. The current north magnetic pole is near the geographic North Pole, but they are not in exactly th...

A:

Q: A parallel plate capacitor has a capacitance of 2.0 nF. The capacitor is initially charged such that...

A: Given,      C = 2 nF = 2×10-9 F     ∆Vi = 100V   k  = 5.4  

Q: When you have two unlike charges in a line - where is the electric field the greatest? Is there ever...

A:

Q: You are on the roof of a Physics Building, 31 m above the ground. Your physics professor, who is 1.8...

A: Time taken for the egg to hit the professor is given by:- h=gt2231-1.86=9.8×t22 hence, solving for '...

Q: A sinusoidal wave travels along a string. The time for a particular point to move from maximum displ...

A:

Q: Playing jackstone as a kid, you discovered that there is a certain time before the rubber ball falls...

A: Given that:- u=4.98 m/sg=9.8 m/s2h=33.78 cm=0.3378 mt=?v=?

Q: A square surface area with side length of 2cm is in the yz plane at x=0, Find the magnitude of the m...

A:

Q: A bullet is fired straight up in the air at an initial speed of 245 m/s. After how much time is the ...

A:

Q: The 2.0 kg block in the figure slides down a frictionless curved ramp, starting from rest at a heigh...

A:

Q: •38 In Fig. 25-29, a potential difference V = 100 V is applied across a capacitor arrangement with c...

A:

Q: The heat of fusion of a substance is 80 cal/gr, so the heat required to melt 2 kg of the substance i...

A: Given data:  Heat of fusion (Lf) = 80 cal/g Mass (m) = 2 kg = 2000 g Required: Heat (Q) 

Q: A skater glides along a circular path of radius 4.90 m. (a) If he coasts around one fourth of the c...

A: radius of the circular path (r) = 4.90 m   

Q: man's eyes 1.75 m above sea level can barely see the top of the lighthouse which is at a certain dis...

A:

Q: Q4: Calculate the magnitudes of unknown forces for particle equilibrium. F2 4 kN 10 kN 25 24 30° 30°...

A:

Q: i j = k Ả ·B = AB sin 0 Ả xB = B × Ả I. I. %3D II.

A:

Q: A circular loop in the plane of the paper lies in a 0.60 T magnetic field pointing into the paper. T...

A: Magnetic field = 0.6T Resistance of coil = 1.55Ω Initial diameter=20.5cm Final diameter=9cm Time =0....

Q: A hot-air balloon is rising upward with a constant speed of 3.500m/s. When the balloon is 14m above ...

A:

Q: An airplane flies 200 km due west from city A to city B and then 275 km in the direction of 36.0° no...

A:

Q: Consider the sealed containers (same fluid and on the same ground level) below with heights given in...

A:

Q: A helicopter needs to travel a displacement of 182 km at 17.0 degrees W of N relative to the ground ...

A:

Q: If a body is projected vertically upwards from the ground, graph will be as shown aboue The maximum ...

A: Take, g=10 m/s2   From graph, it can be inferred that body will reach its max. height in time(t)=4 s...

Q: An object is thrown in horizontal with an initial velocity v0= 10 m/s from the roof of a building 20...

A: Given that:- Height of the building=H=20m

Q: Superpós es 8 Determine the shape of the spring at t = 0.2 s, 0.4 s, and 0.6 s. t= 0.0 s t=0.2 s Fre...

A:

Q: 1. You are driving a late model convertible car at the 65 mph speed limit with its soft flexible roo...

A: Correct answer is option (c).

Q: What must be the distance between the charge q1 =+3 microCoulombs and q2 - 1.5 microCoulombs for the...

A: The given data   The charge q1 = +3μC = +3×10-6 C The charge q2 = -1.5μC = -1.5×10-6 C   The electro...

Q: The boat's position during the interval of time from t 2s to t= 10 s is given by s = 4t + 1.6t-0.08 ...

A:

Q: He:Ne laser operated in threshold condition. Reflection coefficients of the mirrors are: 0.999 and 0...

A:

Q: The best leaper in the animal kingdom is the puma, which can jump to a height of 12.7 ft when leavin...

A:

Q: 3) A 7-kg rock and a 20-kg rock are launched horizontally from a platform with initial velocity of v...

A: The masses of the rock: 7 kg and 20 kg The initial velocity with which the two rocks are launched ho...

Q: A balloon is ascending at the rate of 12 kph and is being carried horizontally by a wind at 22 kph. ...

A: Given : Balloon's speed = 12 kmph and wind speed = 22 kmph Time = 9 seconds

Q: A block has a mass of 81.0 kilograms. The coefficient of static friction between the block and the l...

A: Given data:  Mass (m) = 81.0 kg Coefficient of static friction (μs) = 0.621 Horizontal force (F) = 3...

Q: - Determine the x and y position at which a ball thrown up to the right will strike the inclined sur...

A: Motion of projectile can be divided into x component and y component. 

Q: Inductive battery chargers, which allow transfer of electrical power without the need for exposed el...

A: This question is based on Electromagnetic induction topic. The emf induced in the coils are in direc...

Wien's displacement law

Students often get confused between Wien's displacement law and Planck's radiation law. Although both are historically related, yet they are conceptually different. Planck's law helps determine the spectrum of a blackbody, while Wien's law determines the relationship between peak wavelength and temperature.