Bernoulli’s Principle A wind blows at the speed of 30 m/s across a 175 m2 flat roof of a house. (a) What is the pressure difference between the inside of the house and the outside of the house just above the roof? (Assume that the air pressure inside the house is atmospheric pressure.) (b) What is the force on the roof due to the pressure difference?

Q: A car drives to the north at constant speed. Which direction does its acceleration point? Explain.

A: ANS:- In the given case acceleration will be zero.

Q: What is the weight of the body at the centre of the earth? a) Infinity b) Same as the weight of the ...

A: C

Q: Two objects with a mass of 2kg and the other 3 kg approach each other with velocities of V1=(5m/s)i ...

A: Given that: m1=2 kgm2=3 kgv1=5 m/sv2=-4 m/s

Q: The kinetic energy of a body becomes four times of its initial value, then new momentum will _______...

A: C

Q: A monkey of mass 20 kg is holding a vertical rope. The rope will not break when a mass of 25 kg is s...

A: Option d

Q: Which of the following has body centered cubic structure? a) Polonium b) Copper c) Nickel d) Tungste...

A: D 

Q: please help

A: The X^ operator in terms of ladder operator is, X^=h2mωA+A+    (1)   Where the operation of the A an...

Q: You are working as an intern for a meteorological laboratory. You are out in the field taking measur...

A:

Q: What is the ration of the force of attraction between two bodies kept in the air and the same distan...

A: C

Q: Find the magnitude and direction of the resultant of the two forces shown. (Note: with no length geo...

A: Note that in its vertical plane, F­1’s vertical component (3) is its z-component (F1z) and its horiz...

Q: How much work would be required to move the moon (7.36 E 22 kg) from its current obit of 385 E 6 m t...

A:

Q: How much water a pump of 2kW can raise in one minute to a height of 10m? (g=10m/s2) a) 1000litres b)...

A: Option b

Q: On the application of a constant torque, a wheel is turned from rest through 400 radians in 10s. Fin...

A: D

Q: In the figures below, assume that v, = 7 m/s and v, = 5 m/s. Use a ruler to estimate the magnitudes ...

A: Concept used: Law of vector addition is used.  The resultant vector is the sum of two individual vec...

Q: Thank you!

A: Solution:- Given that  Electric force(F)=4.8×10-14 N Charge of proton(q)=1.6×10-19 C

Q: Statement 1: Linear momentum of a system of particles is zero. Statement 2: Kinetic energy of a syst...

A:

Q: 9. A car drives to the north, but it speeds up. Which direction does its acceleration point? Explain...

A: The car is moving towards the north and speeding up. We need to find the direction of acceleration.

Q: Two masses of 1g and 4g are moving with equal kinetic energy. The ratio of the magnitudes of their m...

A: Option c

Q: Which of the following can execute both translational and rotational motion under the influence of t...

A: The forces of action and reaction cannot cancel each other. This is because of action and reaction, ...

Q: In a capillary tube experiment, a vertical, 30 cm long capillary tube is dipped in water. The water ...

A: Given data L=30 cmh=10 cm

Q: A particles undergoes uniform circular motion. About which point on the plane of the circle, will th...

A: A

Q: When we steer a bicycle round a bend with both our hands on the handlebars, we apply a ___________ a...

A: Option

Q: Kepler’s second law is based on ___________ a) Newton’s first law b) Newton’s second law c) Special ...

A: D

Q: Describe velocity and acceleration and tell how they are related. The length of the essay should be ...

A: Velocity(v):  The change in distance with respect to time is called velocity.  Velocity is vector  q...

Q: (a) Find the charge density (in nC/m²) on the surface of the right face of t plate. nC/m² (b) Find t...

A: Gauss's Law The surface integral of the electric field over any closed surface is equal to 1εo times...

Q: If there is a change of angular momentum from J to 4J in 4s, then the torque is ___________ a) (3/4)...

A: Option

Q: can you help me please?

A:

Q: Imagine a new planet having the same density as that of earth but it is 3 times bigger than the eart...

A: D

Q: A bullet is fired from the rifle. If the rifle recoils freely, then the kinetic energy of the rifle ...

A: By conservation of momentum, MV = mv or V = mv/M Kinetic energy of the rifle is Kr = 1/2MV2 = 1/2M(m...

Q: A 2.0 kg bock of slippery cheese slides along a frictionless track from point a to point b.  The che...

A: Since the gravitational force is a conservative force, the work done is given by:

Q: The rail roads are usually made of steel material segments with a 10 m long. Between each segments t...

A: Subpart (a): Due to the change in temperature, two consecutive rail road will be expanded equally. T...

Q: Two rings of radii R and nR made from the same wire have the ratio of moments of inertia about an ax...

A: As the radius of the second ring is n times, length and hence the mass of wire used is also n times....

Q: A man of mass 60 kg and a boy of mass 30 kg are standing together on a frictionless ice surface. If ...

A: Option c

Q: Find the magnitude and direction of the force on charge q3

A: Coulomb Law The force between two charges q1 and q2 is directly proportional to the product of the m...

Q: The flying wheel attached to the shaft of steam engine works on the principle of ___________ a) Cent...

A: Option b

Q: Rocket engines lift a rocket from the earth surface because of hot gases with high velocity ________...

A: Rocket works on the principle of Newton's third law of motion

Q: How would you solve?

A: Given, Mass, m=24kgHeight, h=5.0mvelocity,v =2.8m/sacceleration due to gravity,g=9.8m/s2            ...

Q: A solid sphere of radius R is placed on smooth horizontal surface. A horizontal force F is applied a...

A: D

Q: B) Find the equation of the plane containing points A, B, and C using a vector approach (from chapte...

A: (B) Given: The points in space are A=4,2,-3, B=-2,5,1 and C=5,1,-2. Introduction: A plane is a flat,...

Q: In which of the following the momentum and energy of each body not conserved? a) Inelastic collision...

A: Option c

Q: Two identical balls A and B collide head on elastically. If velocities of A and B, before the collis...

A: D option

Q: Why are the glasses of building milky? a) Because of unwanted deposits b) Because it becomes old c) ...

A: D option

Q: A block has been placed on an inclined plane with the slope angle θ, block slides down the plant at ...

A: Option

Q: If two soap bubbles of different radii are connected by a tube ___________ a) Air flow from the bigg...

A: C

Q: B. A/ How m of work? B/ How mu

A: Heat Engine A heat engine is a device that is used to convert heat energy into mechanical energy.  A...

Q: The link BC is fixed at point D and freely rotates about this point. The collar B can slide through ...

A: Given The link BC is fixed at point D and freely rotates about this point. The collar B can slide th...

Q: The earth moving around the sun in a circular orbit is acted upon by a force and hence work must be ...

A: False

Q: (P2) Suppose two students are memorizing the elements on a list according to the rate of change equa...

A: Given that the rate of learning is, dLdt=0.51-L        (1) Where L represents the fraction of list t...

Q: Can you help me please?

A: Given: The mass of the container is 2 kg. The mass of the water is 2.3 kg. The temperature is raised...

Q: Two disks on the friction-free air table with a mass of Ma=0.5kg and Mb=0.3kg are colliding flexibly...

A: Given: The initial velocity of disk A is 4 m/s and the final velocity after the collision is 2 m/. T...