do astronauts define “up” or “down” in space? a) There is no “up” or “down” in space b) The side facing the earth is “down” and the opposite side is ‘up” c) “up’ or “down” is decided by the control centre on earth d) The direction of the spacecraft’s power source is “up” and the opposite side is “down
Q: solid sphere is given a horizontal velocity of 4m/s on a flat surface. What will be its velocity whe...
A: D
Q: If forces are acting on a rigid body so that it has zero kinetic energy, then all forces will pass t...
A: B
Q: The following is an acceleration-time graph of a particle with a starting velocity and the distance ...
A: Velocity is defined as the rate of change of displacement with respect to time. Similarly, accelerat...
Q: ring and a disc having masses in the ratio 1:2 are made to rotate about their central axes. Both are...
A: C
Q: _____ is known as the motion that would take place under the applied force if friction were absent. ...
A: a
Q: The figure shows a pendulum with length L that makes a maximum angle 60 with the vertical. Using New...
A: Given : L=1m θ0=42° n=10 The time period of the pendulum is given by : ...
Q: Fire is a form of _____ a) solar energy b) thermal energy c) gravitational energy d) kinetic energy
A: Thermal energy is the consequence of the temperature of an object that is transferred in the form of...
Q: The kinetic energy of a man is half that of a boy whose mass is half that of the man. When the man s...
A: Given, KEman=12KEboyand mboy=12mmanKEman'=2KEboyvman'=vman+5
Q: What is the rate of change of angular momentum? a) Force b) Torque c) Work d) Angular velocity
A: B
Q: Derive the Wein Displacement Law by setting the derivative of the following function equal to zero a...
A: Introduction: The magnitude of the radiation emitted by a blackbody at an absolute temperature at a ...
Q: The potential energy of an object maximises as its velocity increases. a) True b) False
A: This is a problem related to Work, Energy, and Power. Potential energy: Potential energy is defined ...
Q: wp1-
A:
Q: force of 10 N creates a displacement of 2 m but the work done on the body throughout its motion is e...
A: a
Q: The maximum value of static friction when the body is at the verge of starting motion is known as __...
A: B
Q: 3. A Ruby laser contains a crystal length (4cm) with a refractive index of (1.78). The peak emission...
A:
Q: Determine the electrostatic force between a proton and an electron if they are separated by a 55-m d...
A: Electrostatic force of attraction is given by F=14πε0q1q2r2where, separation =55mTherefore putting t...
Q: wp2-
A: Let Ls be the rate at which sun radiates energy. Let r be the radius of the earth’s orbit. Let S be...
Q: A force F = (5i – 3j +2k) N moves a particle from r1 = (2i + 7j + 4k) m to r2 = (5i + 2j + 8k) m. Wh...
A: C
Q: Ques tion No.03 Evaluate the sunface integnl I=faids. uhere a = xi and s Hemis phere fiqure is surfa...
A: The surface is given byx2+y2+z2=a2a normal vector to this surface, can be evaluated by taking its gr...
Q: circular disc is rotating about a central axis perpendicular to its diameter with a speed of 5rad/s....
A: Given: The initial angular speed of disc is ω0=5 rad/s. The final angular speed of disc is ω=0 rad/...
Q: Which of the following is not a conservative force? a) Gravitational force b) Spring force c) Fricti...
A: C
Q: An object is weightless inside a uniform spherical shell. a) True b) False
A: A
Q: Assume that the earth is a perfect sphere but of non-uniform interior density. Then, acceleration du...
A: D
Q: A steel rod 250 mm long and 200 mm in diameter is being reduced to 190 mm in diameter all over its l...
A: Given:- length of rod L=250mm initial diameter D0 =200mm final diameter Df = 190mm Davg=195mm spindl...
Q: 1) The vibrations of an Oxygen molecule, O2 are equivalent to those of harmonic oscillator with a fo...
A: Given, Force Constant,kf=2294N/mm(16O)=15.994mu=15.994×1.66054×10-27kgm(16O)=26.5586×10-27kg(a) Usin...
Q: body having 7 kg of mass moves with a velocity of 20 m/s covers a vertical height of 8.75 m. What is...
A: A
Q: Please answer the question, I will thumbs up. read the problem and answer the three questions. This ...
A: The initial velocity of the ball shot vertically upwards taking upwards to be the positive y directi...
Q: 12: An aluminium thin-walled sphere is used as a marker buoy. The sphere has a radius of 65 cm and a...
A: given, Radius=65 cm=0.65 m Thickness=10 mm=0.01m Density of aluminium =2700 kg/m3 Density of water =...
Q: When a 101 g mass is has stretched a k-9,75 N/m spring 20.4 cm, how much potential energy has been s...
A: Given: Mass is m=101kg. Spring constant k=9.75Nm. Stretch in the spring is ∆x=20.4cm.
Q: Kindly check the answer mentioned in 2nd picture before submitting the solution.
A: Due to symmetry the charge induced will be in pairs of negative and positive charges, distributed sy...
Q: Question 3 motion is a motion of an object near the Earth's surface in an arc or parabolic trajector...
A: An object's projectile motion can be described as the movement of an object in 2D given an initial v...
Q: The moment of inertia of a planar square about a planar axis parallel to one side is 10kgm2. What is...
A: A
Q: The kinetic energy of a man is half that of a boy whose mass is half that of the man. When the man s...
A: Let m1 and v1 is the mass and velocity of the man respectively and m2 and v2 is the mass and velocit...
Q: person whose mass is 90kg is standing on a smooth horizontal platform. He throws a rock of mass 10kg...
A: Given: The mass of person is M=90 kg. The mass of rock is m=10 kg. The time taken by person to cove...
Q: Calculate the efficiency of the Carnot Engine for ideal gas. Consider the figure (see attached pictu...
A: Where segments ad & bc are the adiabatic processes and segment ab & cd are the i...
Q: According to its design specification, the timer circuit delaying the closing of an elevator door is...
A:
Q: A capacitor of 3.23µF has an area of 6.35mm^2. Determine the separation distance between the two pla...
A: Given information: The capacitance of the capacitor, C=3.23 μF=3.23×10-6 F The area of the capacitor...
Q: solid sphere is given a horizontal velocity of 4m/s on a flat surface. What will be its velocity whe...
A: B
Q: The expression for gravitational potential energy is “-(G*M)/r”. a) True b) False
A: B
Q: motor is used to deliver water through a pipe. Let the motor have a power P initially. To double the...
A: D
Q: Which of the following is true? a) Potential energy decreases as altitude increases b) Potential ene...
A: Introduction: Gravitational potential energy is the energy stored in an object as the result of its ...
Q: Which of the following is correct? a) The kinetic energy of a system can be changed without changing...
A: The kinetic energy of a system can be changed without changing the momentum. An explosion of a bomb ...
Q: Consider two perpendicular axis in the plane of a planar body, such that I1 = 2 I2. The moment of in...
A: c
Q: A uniform free rectangular steel plate is heated from 273 to 373 kelvin. The initial area of the pla...
A: A
Q: For an object on the surface of the earth, the magnitude of the acceleration due to the gravity of t...
A: The acceleration gained by an object due to gravity is called acceleration due to gravity. It is der...
Q: The orbital velocity of a satellite orbiting the earth is half the escape velocity of the earth. Wha...
A: C
Q: Pls help on all
A: Given: The half-life of the plutonium-239 is 24000 yrs. The time given is 1000 yrs.
Q: The work done by a body while covering a vertical height of 5m is 50 kJ. By how much amount has the ...
A: A
Q: A cylindrical object of density de as shown in following fig Determine the differential of oscilekti...
A: The force diagram for the given situation can be drawn as below,
Q: The moment of inertia of a ring about a tangent is 4kgm2. What is the moment of inertia about an axi...
A: B
do astronauts define “up” or “down” in space?
a) There is no “up” or “down” in space
b) The side facing the earth is “down” and the opposite side is ‘up”
c) “up’ or “down” is decided by the control centre on earth
d) The direction of the spacecraft’s power source is “up” and the opposite side is “down
Step by step
Solved in 2 steps
