If you go out to look at the night sky tonight from central lowa, the North Star (aka Polaris) is located near the North Celestial Pole at an altitude of approximately 42 degrees above the horizon. Why is that the case?

Q: Find the speed of sound in Helium gas at 20°C. The molar mass of He which is monoatomic is 4 × 10^(-...

A: Temperature is T = 20 oC  Molar mass of helium gas is M = 4×10-3 kg   

Q: Question: How can the velocity ratio of a line be determined with known frequency and line length? D...

A: velocity is defined as rate of change of displacement. it can be written as   v =dldt=LT= Lf (L - le...

Q: A man travels from Mumbai to Delhi in a train covering 1430 km. Then he travelled further to Shimla ...

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Q: When water is heated from 10°C to 15°C What is the change in temperature

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Q: Consider a parallel square-plate capacitor in vacuum being charged by a battery. After charging, the...

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Q: An ant is 9.9 cm tall and stands 6.9 cm in front of an unknown mirror. To its surprise, the ant sees...

A: GivenHeight of the ant(ho) =9.9 cmHeight of image (hi) =8.6 cm Distance of ant from the mirror (u) =...

Q: A 20.0 kg hollow cylinder (I = MR2) has a diameter of 50.0 cm. The cylinder is rolling down a hill w...

A: if the object is rolling then the relation b/w its angular velocity (ø) and linear velocity (v) is g...

Q: A rectangle (J) of iongth (1) equals 20 cm, and width (w) equals 5 cm.f the uncertointy in measuring...

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Q: 1. Energy Conservation A 0.100-kg toy car is launched from a spring that is initially displaced 5.00...

A: Write the given values with the suitable variables. m=0.100 kgx=5 cm=0.05 md=30 cm=0.3 m Here, m, x,...

Q: 1. A 32.0-2 resi and a 20.0-Q are connected in parallel, and the combination is applied across a 240...

A: Ques: Given: R1=32.0ΩR2=20.0Ωconnected parallelV=240 V

Q: Dimension of Planck's constant is similar to: 1. linear momentum 2. angular momentum 3. torque 4. ve...

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Q: Initially, an object in uniform circular motion (assume clockwise motion) has a velocity m vector gi...

A: The acceleration by any object in uniform circular motion is define by a=v2r Here, a is acceleration...

Q: A sanding disk with rotational inertia 2.1x 10-3 kg-m² is attached to an electric drill whose motor ...

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Q: A 600-g piece of tin absorbs 1000 J of heat. By how much will its temperature change? (ctin = 227 J/...

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Q: Two vectors in Cartesian coordinates have components A = (1, 1) and B = (2, y). If the scalar produ...

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Q: Q2 ) What is the relationship between wavelength and propagation velocity ?

A: Let v= propagation spped of wave f = frequency of wave  λ = wavelength of wave      

Q: 16. A solenoid of length 0-20 m, having 120 turns carries a current of 2-5 A. Find the magnetic fiel...

A: Given: L = length of solenoid = 0.20 m N = number of turns in solenoid = 120 turns I = current throu...

Q: How much work is done by gravity in causing a 45-kg rock to tumble 54 m down a slope at an angle of ...

A: mass of the rock, m = 45 kg distance that rock travels, d = 54 m angle of slope with vertical,= 48 d...

Q: If an object starting at rest free falls for 15 seconds, what is the distance it fell? a. 10 m b. ...

A: Given  Object start at rest, U = 0 m/s  Time taken ,T = 15 sec  Distance ,D =??  For free fall, A = ...

Q: Q4- If the mass of cylinder A is 30 kg, determine the mass of cylinder C in order to hold the assemb...

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Q: rectangular surface of length 3.25 cm and width 5.25 cm lies on the x-z plane at y = 0. What is the ...

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Q: Which of the following increases the rotational inertia of a solid diet about its axis, without chan...

A: The moment of inertia of an object is given by I = mk2, where m = the mass of the object k = the rad...

Q: A disk, initially rotating at 136 rad/s, is slowed down with a constant angular acceleration of magn...

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Q: The graph shows the velocity of a particle moving on the x-axis. The particle starts at x = -5 when ...

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Q: When is work done on an object? O When a force is applied to an object and the object moves in the s...

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Q: The force needed in accelerating a 3 kg mass at 5 m/s? and a 4 kg mass at 4 m/s?, will be: (A) Zero ...

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Q: Birds rest on live wire on the streets, why are they not being electrocuted. Will men not get electr...

A: Answer:-  The feathers of birds act as a insulator and hence the current does not pass through them....

Q: When a certain force is applied to an object with a mass of 2 kg, its acceleration is 10.0 m/s². Whe...

A: Given data:  Mass of first object (m1) = 2 kg Acceleration of first object (a1) = 10.0 m/s2 Accelera...

Q: In the figure, block 1 of mass m, slides from rest along a frictionless ramp from height h = 3.3 m a...

A: Giventwo blocks of mass m1 and m2 a shown in given figure m2=3 m1 h=3.3 mμk=0.35

Q: A potential difference of V = 80.0 V is applied across a circuit with capacitances C1 = 15.0 nF, C2 ...

A: Given  Potential difference, V = 80.0 V  Capacitance  C1 = 15.0 nF C2 = 7.0 nF C3 = 20.0 nF  

Q: 16. A solenoid of length 0-20 m, having 120 turns carries a current of 2-5 A. Find the magnetic fiel...

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Q: At the centre of a cubical box +Q charge is placed. The value of total flux that is coming out a wal...

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Q: 4. Point charges q, = +12 nC and q2 = -12 nC are 0.100 m apart. Compute the electric field caused by...

A: Electric field due to point charge E = KQ/r2 IIf two or more than two electric field acts at a poin...

Q: (a) What is the mass of the hydrometer? (b) What is the density of the alcohol?

A: weight =buoyant force, this concept is used here. 1.The mass of the hydrometer is 10 gm and 2. The d...

Q: that affect the speed of wave propagation within the transmission line in an optical fiber?

A: Given : Optical fiber We have to find the factors that affect the speed of wave propagation within t...

Q: 3. Point charges qı=-8nC and q2=11nC are 9.0m apart. Compute the electric field caused by q1 and q2 ...

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Q: A monochromatic source of light emits photons of frequency 6 x 1014 Hz. The power emitted by the sou...

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Q: The pressure of a gas inside a rigid 2.4 L cylinder is decreased from 4.8 atm to 3.4 atm. How much w...

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Q: A drum rotates around its central axis at an angular velocity of 17.3 rad/s. If the drum then slows ...

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Q: E= 60.0 V, r=0 3.00 0 12.0 6.00n 4.00

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Q: Using the component method determine the resultant(magnitude and direction) of the following: B = 20...

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Q: When a piece of aluminum foil is taken out of the oven and cools from 100°C to 50°C. What is the cha...

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Q: One morning, Connie walks from her house to go to a store that is 500 ft, S 40o W from her house. Sh...

A: Let Connie's house be at the origin so first she walks A=120 ft (SW) then B=100 ft (10o South of Eas...

Q: . An infinite uniform line charge, Pi = 2 nC/m, lies alone the x -axis in free space, while point ch...

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Q: Manny Pacquiao's automobile is about to come closer to a barrier at a speed of 25 m/s along a level ...

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Q: Find the magnitude of the magnetic force (FB) of an electron moves through space with a speed of v= ...

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Q: Eaampre #5 The pigure below shows a box with a mass OF 20kg sliding Prano which ma kes an angle OF 5...

A: The box will move downward as the force mgsin55  is greater than the friction force. As the block st...

Q: If a test charge of 9.25 mC is in a electric field that produces 1.2025 N. What is the intensity of ...

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Q: A 97.5-kg man pushes a crate 4.5 m up along a ramp that makes an angle of 17.5° with the horizontal....

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Q: Light with a frequency of 7.26x 10^14 Hz lies in the violet region of the visible spectrum. What is ...

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