A leamer weighing 800N runs up 20 stairs each 20cm high in 4 seconds. How much power is exerted by the learner? A 300W B 400W C 600W D 800W W=

Q: What is the work done in lifting 30 kg of bricks to a height of 20 m on a building under…

A: Given data: Mass (m) = 30 kg Height (h) = 20 m Required: The work done (W)

Q: An aluminum wire having a cross-sectional area equal to 2.00 x 10-6 m² carries a current of 7.00 A.…

A: No no n no

Q: X A DESTION 13 A 90 kg man stands in an elevator that is moving up at a constant speed of 5.0 m/s.…

A: Given data:  Mass (m) = 90 kg Speed (v) = 5.0 m/s, upward Acceleration (a) = 0 m/s2 Required: The…

Q: 7. The three-toed sloth is the slowest-moving land mammal. On the ground, the sloth moves at an…

A:

Q: 5. GO The data in the following table describe the initial and final posi- tions of a moving car.…

A:

Q: Calculate the density of plastic from the following data, a. Mass of plastic = 52 g b. Initial…

A:

Q: At location C there is an electric field in the direction indicated below. A sulfide ion S²- is…

A: Sulphide ion is negative in charge.

Q: Acceleration is the change in velocity over time. Given this information, is acceleration a vector…

A: We know that acceleration is equal to change in velocity with respect to time. As velocity is equal…

Q: A 0.170-kg cube of ice (frozen water) is floating in glycerine. The gylcerine is in a tall cylinder…

A:

Q: Two mobiles start from the same point of a circumference and have the same initial speed V0,…

A: When particle is in accelerated motion with acceleration a then velocity varies as v=u+at Where u is…

Q: Express it in,

A: Given data;  Density of iron is= 1.49 g/ltrExpress it in: a. g/cm3 b. kg/m3

Q: In the figure, point P2 is at perpendicular distance R = 27.3 cm from one end of straight wire of…

A:

Q: Give an example in which there are clear distinctions among distance traveled, displacement, and…

A: Distance traveled by an object is a scalar quantity. That is it has only magnitude. Displacement is…

Q: A.)An asteroid, whose mass is 4.70×10-4 times the mass of Earth, revolves in a circular orbit around…

A: Given:- Ma = mass of asteroid= 4.7×10^-4 × Me Ra = orbital radius of the asteroid= 5×Re Te = 1 year…

Q: force of 30 N will stretch an elastic cord 250 mm. If the force required to stretch the cord varies…

A: Given: The applied force is 30 N. The stretching in the elastic cord is 250 mm.   To find: The work…

Q: **13. You are on a train that is traveling at 3.0 m/s along a level straight track. Very near and…

A:

Q: 1. A stone is thrown vertically downward with a velocity of 5 m/s from a window 50 meters above…

A:

Q: A charge of +2 μC charge is placed at the x = 0 Find the absolute potential at a point located at x…

A:

Q: A car starting from rest moves with constant acceleration. after 10 sec, the velocity is now 30 m/s.…

A:

Q: Three identical blocks are placed on top of each other. To overcome the force of friction a force of…

A: Correct answer is option (b) i.e. 10

Q: Given data: Density Mass II 160 kg / m3 12 kg

A: Given dataDensity=160kg/m3Mass=12kg

Q: 18) A solid uniform disk (1=0.5mr²) is rolling without slipping along a horizontal surface with a…

A:

Q: A 4.00-mol sample of helium gas initially at 300K, and 0.4 atm is compressed isothermally to 1.60…

A: Hi, you have submitted multiple questions and it is not specified in which problem you need help.…

Q: Two charges q₁ and q2 are placed to either end of the hypotenuse of a right triangle, with a = 3…

A: in question  we determine q1 sign , angle , q2 and electric field magnitude.

Q: Find the mass of a car that drives at 20 m/s and has 12500 J of energy.

A:

Q: what will be his.

A: Given. Weight of a body of mass 8 kg on moon is 30 NIf a boy of mass 20 kg goes from earth to the…

Q: Three point charges are located as shown in the figure. 92 d3 93 91 d₂ d₁ 9₁ = 8 x 10-¹2 [C] and d₁…

A:

Q: A motor boat moves at a steady speed of 3 m/s. Water - resistance acting on it is 1440 N. Calculate…

A: Given data: Speed (v) = 3 m/s Force (F) = 1440 N Required: The power (P)

Q: What is the pressure on a swimmer 10 m below the surface of a lake (density of water is 1000 kg/m3)…

A:

Q: Three balls (1, 2, 3) roll on the surface of a table at different speeds (V₁, V₂, V3). If the balls…

A: Given Intial speed of three ball are v1, v2 and v3 Ball fall from the same table at the same time We…

Q: A QUESTION 15 A block is placed on a rough wooden plane. It is found that when the plane is tilted…

A: Please note : As per answering guidelines I can answer the first question only. Since, this is not a…

Q: A uniform meterstick is supported at the 50 cm mark. A 25N weight is placed at the 10 cm mark. Where…

A: Rotation is when body revolves around a fixed axis. All the particles of body go circular motion. A…

Q: In the figure particle 1 (of charge +9.48 mC), particle 2 (of charge +9.48 mC), and particle 3 (of…

A:

Q: Two wires have the same resistance and diameter. If the wires are made of platinum and copper with…

A: Let the resistance of each wire = R Let the diameter of each wire = d The resistivity of platinum =…

Q: A piece of wood with density of 706 kg/m³ is tied to the bottom of a pool. The volume of the wood is…

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Q: A road with a radius of 75.0 m is banked so that a car can navigate the curve at a speed of 13.2 m/s…

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Q: car accelerates from 25 km/hr to 55 km/hr in 30 seconds. What is its acceleration?

A:

Q: CEEB 3 mm QUESTION 26 A small object slides along the frictionless loop-the-loop with a diameter of…

A: in this question  we determine  answer by equation of radius .

Q: Find the angles that vector Ď = (2.5î – 4ĵ + k) m makes with the x-, y-, and z- axes. 0x Oy = = 0₂:…

A: GIVEN: D= 2.5i^-4j^+k^

Q: In Newton's rings experiment where light with λ = 420 nm is incident normally, if the radius of the…

A:

Q: The electronic structure of a toms and molecules may be investigated using proto eletrons…

A:

Q: Each part of the figure below shows oscilloscope displays of various rectifier output voltages. In…

A: in this question  we discuss about output of rectifier.

Q: Chinmay walks a distance 45m in 2 min and another 45m in 2.5min. describe the type of motion of the…

A:

Q: A car moving with an initial speed v collides with a second stationary car that is one-half as…

A: in this question we determine answer by conservation law of energy initially and finally.

Q: 4. Which of the following statements is TRUE? - All electromagnetic waves travel through a vacuum at…

A: Electromagnetic waves.

Q: a 50kg block of wood is inially at rest on a horizontal surface. The coefficients of static and…

A: A) Draw the free-body diagram of the block.

Q: 91 = 8 x 10-¹2 [C] and d₁ = 8 [cm] 92 = 6 x 10-12 [C] and d₂ = 6 [cm] 93-9 x 10-12 [C] and d3 = 5…

A:

Q: 1 A microlensing event with a caustic event is observed with magnifications of 7 and 6 respectively.…

A: It is given that a caustic event and a microlensing event are seen at magnifications of 7 and 6,…

Q: What is the magnitude of magnetic force per unit length on a wire carrying a current of 8 A and…

A: The magnetic force is a consequence of the electromagnetic force, one of the four fundamental forces…

Q: A cart (m=14 kg) slides along a level track with a velocity of 5 m/s. It then collides and sticks to…

A: