Using conservation of energy, how fast would a rollercoaster be traveling at a point half way above the ground where it started from, assuming that is started at rest and 53.1 m above the ground?

Q: If two bodies of equal masses undergo elastic collision in one dimension, then their velocities are…

A:

Q: A conventional medical X-ray produces

A: ANS: c. two-dimensional

Q: Find the moment of inertia about centroidal XX axis Width-5 m Depth=8 m

A: Given: The width is 5 m. The depth is 8 m.

Q: A battery with an emf of 15 V delivers 374.1 mA to a 35 Ω load. a. What is the internal resistance…

A: Given, EMF of the battery = 15 V = E Current delivered by the battery = 374.1 mA =I Load resistance…

Q: A ball of 1-kg makes an elastic head-on collision with another ball of unknown mass that is…

A:

Q: A student's test is placed 25cm from Ms. Bailey's old eyes. Her glasses form an upright image 120cm…

A:

Q: Given data: Mass=2.5 kg Volume=0.0001 m3 Find density

A: Given data The mass of the object is given as m = 2.5 kg. The volume of the object is given as V =…

Q: What is the maximum possible number of spectral lines observed, when the hydrogen atom is in its…

A: When the atom absorbs one or more quanta of energy while in its ground state, the electron moves…

Q: Practice 2: As shown below, If D = A -2 B+ C. Calculate A. (B+D). B = 5 N 37 C = 10 N A = 10 N…

A:

Q: The continuous-spectrum radiation that a blackbody emits is called A. Emitting light. B. Ultraviolet…

A:

Q: The Thermistor advantages .A Very sensitivity .B Small mass .C Changes rapidly with temperature .D…

A:

Q: A 15-ohm resistor has a constant current. If 3300 C of charge flow through it in 5 minutes what is…

A: We need to calculate the value of electric current in the circuit.

Q: Ricky moves a wagon a distance of 36 meters by pulling the handle with a force of 120 Newtons. If…

A: Given: Force (F) = 120 N  Distance (d) = 36 m  Work done = 2200 J

Q: Carries sound waves by amplitude or frequency modulation.. O A O B Radio waves Microwaves O c…

A: Radio waves, having the longest wavelength carries sound waves by amplitude modulation(AM) or…

Q: 3> A block of mass m slides along a frictionless track as shown in the Figure. Its speed when it…

A: Given Data : The velocity at point A is given as vA=8 ms The velocity at point B is given as vB=3 ms

Q: The voltage in circuit is 46 V and resistance is 8 ohms, find the current ?

A: Given data : Resistance is denoted by R Voltage is denoted by V   We have  to compute the current…

Q: 3B. 100-N block on a rough 30º-incline is acted upon by a force P as shown causing it to accelerate…

A:

Q: Find the value of distance covered by car in 5 s if speed of car is 20 m/s

A: Given data : Speed of car=S Time=t   Required : Distance

Q: The source of electrons is .A negative electrode .B cathode .C all of above .D

A:

Q: Find the force on an electron if it is placed at a point where the electric field intensity is 240…

A: Given, Electric field intensity at a point, E = 240 N/C (towards right)

Q: 1C. The given system of knotted cords (label the left knot as J and the right knot as K) supports…

A:

Q: A man throws a stone upward at an angle of 30° to the horizontal. It lands 60 m measured…

A: Write the given values with the suitable variables. θ=30°x=60 mh=2 m Here, θ, x, and h are the…

Q: Complete the table for the Expt: Ohm's Law and series and parallel Current, Resistance, ohms…

A:

Q: Thermography is .A different temperatures .B mapping .c two different metals .D consists of two…

A: Thermography is mapping to create thermal maps for survey, that is used for different purposes. Also…

Q: 1. An object of charge +2.0 ×10°C is located at the Cartesian origin, (Om,0m). A second object, of…

A:

Q: 3. What is the momentum of a 250 kg of a mini car whose velocity is 10 m/s?

A: The momentum of a body of mass m kg moving with velocity v m/s is given by, p = (mv) kg.m/s.

Q: 4. As a charged particle enters a magnetic field, the object will undergo circular motion in that…

A: Say we have a charged particle of mass m and charge q which has an arbitrary velocity v which enters…

Q: Find the value of final speed of car Initial velocity=2.05 m/s

A: Given data : Initial velocity=U Acceleration=a Time=t   Required : Final velocity

Q: 1> A block of mass 10 kg is acted by the two external forces as shown. If the coefficient of kinetic…

A: Given: The mass of the object is 10 kg. The coefficient of the friction is 0.25. F1=15 NF2=25 Nθ=20°…

Q: what is reflection?

A:

Q: 3C. A 100-N block on a rough 300-inçline is acted upon by a force P as shown causing it to…

A:

Q: 28. Blocks A and B are connected by a cable that passes over what should be the mass of B to keep…

A:

Q: R=2002 I= 5A V= ???

A:

Q: 1C. The given system of knotted cords (label the left knot as J and the right knot as K) supports…

A: Here A, B, C vectors are showing the direction of tension in A, B, C cords respectively.

Q: A block of mass m, resting on a frictionless surface starts moving under the influence of a constant…

A: As we know, s=ut+12at2,  now from given condition initial velocity "u" is equal to zero. therefore,…

Q: For the given figure, the weight of the 9-ft bar is 6 lb. If F = 5.14, the reaction exerted by the…

A: Force produces torque. This torque bring about rotation. Force may be balanced but torque may be…

Q: Modified True/False Indicate whether the statement is true or false. If false, change the identified…

A: Please see the answer below.

Q: Blocks A and B are connected by a cable that passes over a frictionless pulley as shown. If the…

A:

Q: A 76-kg crate (as shown in the figure) moves down along an incline with an initial speed of 7 meters…

A:

Q: How much time does it take to lift 500 kg

A: Given; height,h=50 mDevelops power,P=65 kWTime taken to lift the weight to a height of 50 m is ?

Q: Consider the arrangement shown in Figure P31.26. Assume that R = 6.00 N, e = 1.20 m, and a uniform…

A: Given data: The resistance is R=6.00 Ω. The length of bar is l=1.20 m. The magnitude of magnetic…

Q: Modified True/False Indicate whether the statement is true or false. If false, change the identified…

A: To indicate whether the following statement: "increasing the number of loops in a solenoid will…

Q: What is the final temperature when 22 g of Aluminum at 30°C is placed in 200 g of water at 20°C?

A:

Q: What is the direction of the acceleration of your car when you start backing out of your parking…

A:

Q: BA В В 44 (a) (b) (c)

A: Introduction: When a charge moves in the magnetic field, charged particles experience a magnetic…

Q: Calculate the value of work done Force applied on crate=20 N Distance moved by crate=2.02 m

A: Write the given values with the suitable variables. F=20 Nd=2.02 m Here, F is the applied force and…

Q: A 100-N block on a rough 30o-incline is acted upon by a force P as shown causing it to accelerate at…

A:

Q: For the following motion equation s=2t^3 -15t^2+36t-22, t⩾0 a. When is the particle at rest?

A:

Q: Give eight physical evidences that light travels in straight lines.

A: Life without light would have been pretty dull. Light travels at a speed of 186,000 miles per…

Q: 250.0 N box is placed on a horizontal surface and a force of 150 N is applied at an angle of 30.0o…

A: