+ + + + + + + +

Q: Vehicles carrying inflammable materials usually have metallic ropes touching the ground during motio...

A:

Q: A car weighs 1800 kg. The distance between its front and back axles is 1.8 m. Its centre of gravity ...

A: Given,Centre of gravity from the front axle isCalculate the distance of center of gravity from the b...

Q: Define heat capacity and specific heat capacity. Also give its formula which is used for its calcula...

A: Heat Capacity: Amount of Heat Energy supplied to a body to raise its temperature by unity is known a...

Q: Obtain the phasor notation of the following time-harmonic functions with an angular frequency of w (...

A: A phasor diagram looks like this:

Q: Explain reflectoin and refraction of waves. Also write suitable example.

A: Step 1Light moves in the form of waves. Waves can be transmitted, reflected and refracted.

Q: If Earth were smaller than it is, but the Alexandria-to-Syene distance were the same, would the shad...

A:

Q: State relation between frequency of wave and angular frequency.

A:

Q: A shot leaves the thrower’s hand 6.5 ft above the ground at a 45° angle at 44 ft/sec. Where is it 3 ...

A: The expression for the motion of the projectile

Q: A diver explores a shallow reef off the coast of Belize. She initially swims d1 = 74.3 m north, make...

A:  The vector representation of total travelled distance is,

Q: Explain the expanding Universe theory and its relationship to the Big Bang theory?

A: Big bang theory: According to the big bang theory, initially the universe was a very dense mass part...

Q: A child running a temperature of 101°F is given an antipyrin (i.e. a medicine that lowers fever) whi...

A:

Q: What concept was missing in peoples minds in the 16th century when they couldn’t believe Earth was m...

A: It is the concept of inertia which was missing from people’s mind in the sixteenth century when they...

Q: Define centre of gravity.

A: Center of gravity can be defined as:

Q: A professional golfer swings a golf club, striking a golf ball that has a mass of 55.0 g. The club i...

A: The expression for the required force is,

Q: A small, 3.00-g plastic ball is suspended by a 26.0-cm long string in a uniform electric field as sh...

A: Given:Mass of plastic ball (m) = 3.0 gmIntensity of electric field (E) = 1140 N/CAngle made with ver...

Q: Write applications of Doppler effec.

A: Doppler effect:It is defined as the apparent change of wave parameters (such as wave length, frequen...

Q: calculate the final temperature if 200mL of water at 22.0'C is combined with 50.0g of gold at 200'C....

A: let Tf be the final tempertaure.

Q: What is the frequency of oscillation of a simple pendulum mounted in a box that is freely falling un...

A: The time of the simple pendulum is given by

Q: What do you mean by plane progressive harmonic wave?

A: When a wave travels with constant amplitude continuously through a medium without any change in dire...

Q: A metre long narrow bore held horizontally (and closed at one end) contains a 66 cm long mercury thr...

A:

Q: Two point charges qA = 3 µC and qB = –3 µC are located 20 cm apart in vacuum. (a) What is the electr...

A:

Q: How much heat per second (H = Q/ΔT) is lost from the house due to heat conduction?   The answer in ...

A:

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: Choose the BEST answer to the following: Compared with the Newtonian momentum p = mv, the momentum o...

A: When the objects travel with greater speeds comparable with the velocity of light, the relativistic ...

Q: Number 9

A: Given:Magnitude of electric field = 116 N/CMass of particle = 1.5 X 10 -15 gCharge on particle = e

Q: A narrow sound pulse (for example, a short pip by a whistle) is sent across amedium. (a) Does the pu...

A: a)the pulse does not have any definite wavelength or frequency but have a definite speed if and only...

Q: A body cools from 80 °C to 50 °C in 5 minutes. Calculate the time it takes to cool from 60 °C to 30 ...

A: Newton’s law of cooling gives,

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: How far does the sound wave travel in the air when the tuning fork of frequency 560Hz makes 30vibrat...

A:

Q: A bird sitting in a tree is traveling at 30 km/s relative to the faraway Sun. When the bird drops to...

A: AnswerThe bird still go 30km/s

Q: Define Torque and angular momentum.

A: The term torque and angular momentum are commonly used while describing rotational motion of an obje...

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: What is being transported along a clothsline when a wave moves from one end to the other?

A: The waves produced on a clothesline are standing waves.

Q: Is inertia the for moving objects maintaining motion or the given to this property?

A: From Newton's first law of motion, it is said that "anybody is in motion or in rest will continue to...

Q: What is angular acceleration?

A: Angular acceleration (α):The rate of change of angular velocity is termed as angular acceleration.It...

Q: Chapter 3 P 3.5 A roller coaster moves 200 ft horizontally and then rises 135 ft at an angle of 30.0...

A: Motion of the roller coaster is shown below:

Q: 14. A cart has a mass of 50 kg. 4 people are pulling on it. One pulls North with a force of 100N. Th...

A:

Q: In the question above if q 1 has mass 0.2g and charge q 2 is 2.4x10 -9C.  The separation r is 4.7cm,...

A: Write the expression for the electric field produced by the charge q2 at the place of q1 , which is ...

Q: Define Greenhouse effect.

A: Greenhouses allow shorter-wavelength light to pass through them but doesn't let the longer wavelengt...

Q: In a certain region of space, electric field is along the z-direction throughout. The magnitude of e...

A:

Q: Can force be expressed in units of pounds and also in units of newtons?

A: The force is a vector quantity and it is a product of mass to acceleration.

Q: Two waves on a string are given by the following functions: y,(x,t) = 4cos(20t–30x) (cm) y,(x,t) = -...

A:

Q: Why the coolant in a chemical or a nuclear plant (i.e., the liquid used to prevent the different par...

A: Reason:The coolant in a chemical or nuclear plant should have a hogh specific heat beacuse Higher th...

Q: The triple points of neon and carbon dioxide are 24.57 K and 216.55 K respectively. Express these te...

A: From Kelvin to Celcius:

Q: Discuss Newton's formula for the speed of sound waves in a medium.

A: When sound propagates in air, compression and rarefaction occurs. Newton assumed that these processe...

Q: A uniformly charged conducting sphere of 2.4 m diameter has a surface charge density of 80.0 µC/m2 ....

A: (a).The charge on the sphere can be calculated as follows,

Q: A stone dropped from top of the tower 300m high splashes into water of a pond near the base of the t...

A: Write the kinematic expression for distance travelled

Q: What relationship between the Sun and Earth did Copernicus formulate?

A: In his book “On the Revolutions of the Heavenly Bodies”, Copernicus formulated that the sun, not the...

Q: Two sitar strings A and B playing the note ‘Ga’ are slightly out of tune and produce beats of freque...

A: Let m be the beat frequency in the first case, m’ be the beat frequency in the second case, fa be th...

Q: Io, one of the satellites of Jupiter, has an orbital period of 1.769 days and the radius of the orbi...

A: Using the Kepler’s third law of planetary motion,

Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.