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Q: Give the geometric meaning of SHM with the help of uniform circular motion.

A: Along the circumference of a circle having radius “a”, particle A is moving such that the projectio...

Q: A refrigerator is to maintain eatables kept inside at 90C. If room temperature is 360C, calculate th...

A: Given:Temperature inside the refrigerator(T1)=90°C=363kRoom temperature(T2) =360°C=633k

Q: Explain referigerators and heat pumps.

A: Refrigerator:The process of removing heat from bodies colder than their surroundings is called Refri...

Q: In daily life, we see many cases of people who are caught misrepresenting things and who soon therea...

A: In daily life we come across many people who individual ideas and interceptions which are based on t...

Q: A dielectric slab with thickness d, it is being inserted halfway into the capacitor (covering half t...

A: GivenThickness d = 0.5 c m = 0.5 x 10-2 mCross-sectional area A = 34 cm2 = 34 x 10-4 m2Dielectric co...

Q: Choose the correct alternative:(a) If the zero of potential energy is at infinity, the total energy ...

A: Click to see the answer

Q: The wavelength of a certain laser is 0.66 microns, where 1 micron = 1 ⋅ 10-6 m.What is this waveleng...

A: Let us take any number say 3.42, if we shift the decimal point to the left, the power of 10 increase...

Q: If an explosion takes place at bottom of a lake, will the shock waves in lake be longitudinal or tra...

A: Shock wave is a propagating wave which have travel faster compare to sound wave.

Q: A load of mass m falls from a height h onto a scale pan hung from a spring . The scale pan starts to...

A: Mass of object = m.Height from which it is fallen in pan = h.Spring constant = k.

Q: In the figure, the particles have charges q1 = -q2 = 410 nC and q3 = -q4 = 97 nC, and distance a = 4...

A: Finding the forces :

Q: What experimental evidence is there for assuming that the speed of sound is the same for all the wav...

A: Experimental evidence is there for assuming that the speed of sound is the same for all the waveleng...

Q: A pendulum clock keeping correct time at sea level is taken to a depth of 1km below sea level. Find ...

A: GivenDepth d = 1 km = 1 x 103 m

Q: Choose the BEST answer to the following: Things that are equivalent according to the equivalence pri...

A: Actually, gravity and acceleration both are same as per equivalence principle.Gravity is the gravita...

Q: Let V = 6+ j8 and I = -(2 + j3). (a) Express V and I in phasor form, and find (b) VI, (c) VI*, (d) V...

A: (a) Phasor form of V is,

Q: What is the Moho? Describe the basic differences between continental crust and oceanic crust.

A: Generally, the Earth's crust is divided into older, thicker continental crust, and younger, denser o...

Q: Define radius of gyration.

A: Radius of gyration is termed as a root of ratio of moment of inertia and the area of the given mater...

Q: A pigeon takes the infrasonic hearing prize, what is meant by the statement?

A: Click to see the answer

Q: Define moment of force (torque).

A: Moment of a force is defined as the turning effect of a force about a pivot point or the ability of ...

Q: Choose the BEST answer to the following: A big fish swims upon and swallows a small fish at rest. Ri...

A: According to the law of conservation of momentum, the momentum after and before the lunch is same.

Q: A rocket is fired ‘vertically’ from the surface of mars with a speed of 2 km s-1. If 20% of its init...

A: Given:Initial velocity of the rocket, u = 2 km/s = 2000 m/sMass of mars = 6.4×1023 kgradius of mars...

Q: Deaf people can be made to dance to music. Explain how?

A: Deaf people can be made to dance to music by,

Q: Show that for a particle in linear SHM , the average kinetic energy over a period of oscillation equ...

A: The displacement and velocity of a particle executing SHM is

Q: Earthquakes generate sound waves inside the earth. Unlike a gas, the earth can experience both trans...

A: Assume that P and S are travelling with a speed v1 and v2 respectively. And the time for travelling ...

Q: Find the phasor notation of: C(t) DE(t)/at, where E(t) = cos (wt + + 4 sin(wt) £ + [8 cos(wt) – sin(...

A: Click to see the answer

Q: Explain the concept of acceleration due to gravity of the earth.

A: Explanation:When the object falls towards the earth due to the earth’s gravitational force, it somet...

Q: An ice cube is given a small displacement from the bottom of the spherical bowl of 10cm radius . Ass...

A: An ice cube is given a small displacement from the bottom of the spherical bowl of radius r is simil...

Q: A bullet of mass 10 g and speed 500 m/s is fired into a door and gets embedded exactly at the centre...

A: The moment of inertia of the door about the vertical axis at one end is

Q: Show that the combined spring energy and gravitational energy for a mass m hanging from light spring...

A: Step 1The reference level for gravitational potential energy is set midway between the unstretched a...

Q: According to four-dimensional geometry, the angles of a triangle add to 180° (a) always. (b) sometim...

A: The four dimensional geometry is also called as Euclidean geometry extended into one additional dime...

Q: A man with wrist watch on his hand falls from the top of a tower. Does the watch give correct time d...

A: The free fall has no dependence with the time shown in the wrist watch. The expression for the time ...

Q: A car is travelling straight at 17.7 m/s. After 12 s its speed is 14.1 m/s. Find the car's average a...

A: Acceleration is defined as, a = (Final velocity - initial velocity) / TimeA negative acceleration me...

Q: Distinguish between free forced, damped and resonant vibrations.

A: Without the help of any external forces to start the oscillation,, free oscillation will have the ca...

Q: An electric heater supplies heat to a system at a rate of 100W. If system performs work at a rate of...

A: Given :Q=100J/SW=75J/s

Q: A javelin leaves the thrower’s hand 7 ft above the ground at a 45° angle at 80 ft/sec. How high does...

A: We know,

Q: Estimate the total number of air molecules (inclusive of oxygen, nitrogen, water vapour and other co...

A: Click to see the answer

Q: Two SHMs of same time period and amplitude differ in phase by an angle (3.147/2). At what time the t...

A: Phase difference between two SHMs = 3.147/2 = 1.5736 rad = 90˚Let the time period of SHM = T.Amplitu...

Q: Membrane walls of living cells have surprisingly large electric fields across them due to separation...

A: We know,The voltage, V = Electrc field, E x Thickness, d

Q: A star 2.5 times the mass of the sun and collapsed to a size of 12 km rotates with a speed of 1.2 re...

A: Gravitational acceleration is,

Q: What happens to the wavelength of the water waves as you decrease the frequency by putting your fing...

A: Frequency and wavelength is related as,

Q: Does the sound bomb explosion travel faster than the sound produced by a humming bee?

A: Click to see the answer

Q: Consider an electron and a negative hydrogen ion (one having an extra electron) accelerated form res...

A: Let me be the mass of the electron, mh be the mass of the hydrogen, V be the potential through which...

Q: A helicopter is hovering above the ground. Jim reaches out of the copter (with a safety harness on) ...

A: Given information:The height of the helicopter (H1) = 180 mThe height of the roof from the ground (H...

Q: PLEASE HELP ME I NEED THE ANSWER ASAP MUCH APPRECIATED THANKS ??

A: Given information:Initial velocity of the stone (u) = 20.4 m/sThe height of the building (H) = 57.9 ...