In a chemical reaction, some interatomic bonds are formed and others are broken. The reaction is exothermic if The amount of energy input when bonds are formed exceeds the amount of energy released when bonds are broken The amount of energy released when bonds are broken exceeds the amount of energy input when the bonds are formed O The amount of energy released when bonds are formed exceeds the amount of energy input when bonds are broken O The amount of energy input when bonds are broken exceeds the amount of energy released when bonds are formed

Q: 9. Find vn. Let V₁ = 4V, R₁ = 2k, R₂ = 4 kN, R3 = 2 kN, R₁ = 2 kN, V¯ = -1.67 V, and V+ = 5 V. a)…

A: 1).Let's solve the given circuit problem step by step. The question asks us to find the current and…

Q: 6. You carry your own weight up a 1170 m high mountain. (That's the vertical height, not the…

A: Given Mass of the person is m=95 kg Height of the hill is h=1170 m   We have to find energy expended…

Q: If your body is 20 percent efficient in converting food intake to useful work, how many kcal of food…

A: Write the given values with the suitable variables. η=20 %W=25×105 J Here, η and W are the…

Q: Calculate the force needed to do 500 J of work while pulling a cart a distance of 3.4 m.

A:

Q: 8. What is the kinetic energy of a 1200 kg car travelling 90 km/h?

A: Given: The mass of the car is 1200 kg. The speed of the car is 90 km/h.

Q: . You use 40 J of energy to rise a 250 N object. How far high did you lift it

A: Given Potential energy is U=40 J Weight of an object is mg=250 N

Q: 28. How much work is done lifting a 3-m chain over the side of a building if the chain has mass…

A: Required : Work done in lifting a chain.

Q: Find the spring constant k for a spring if a force of 19 N stretches the spring 0.46_m.

A: Given data:  Force (F) = 19 N Stretch in Spring (x) = 0.46 m Required: The spring constant (k)

Q: How much work is it to lift a 25 kg sack of cement vertically 4.3 m?

A: Given , Mass of sack of cement (m)= 25 kg  Sack of cement lifted vertically h= 4.3 m

Q: b) a=0.195 m/s', T=49.98 N No friction e- 32

A:

Q: A block of mass 0.255 kg is placed on top of a light, vertical spring of force constant 4 850 N/m…

A: Solution:-        Enery stored in the spring will be converted to the…

Q: 7. Determine the total work required to accelerate a vehicle of mass 1500 kg from 10 m/s to 25 m/s.

A: Given, Mass , m = 1500 kg Initial velocity = 10m/s Final velocity = 25m/s Work done = change in…

Q: 300 | of work are required to fully drive a stake into the ground. If the average resistive force on…

A: Given, Work required to fully drive a stake, W = 300 JResistive force on the stake by the ground, fd…

Q: 10. How much work is done to accelerate a 2,500 kg car from rest to a velocity of 27 m/s?

A:

Q: 5. If you tried to lift the object but couldn't, was any work done? Explain your answer.

A: Lets assume the force on the object to be F. And Displacement to be d. But as we couldnot lift the…

Q: 1. How much power is required when using a 12 N force to push an object at a velocity of 3 m/s?

A: Given data :  Force "F"= 12N  Velocity "v"= 3m/s

Q: How much work is done by a girl weighing 500 N in climbing 5.0 m up a rope in the school gym?

A: Given data:  Weight (mg) = 500 N Height (h) = 5.0 m Required: Work (W)

Q: Determine the potential energy of the 250-g book if it fall from the roof of a building with a…

A: Given data: Mass (m) = 250 g = 0.250 kg Height (h) = 25 m Required: The potential energy

Q: Question 10) Sasha pushes a 15 kg cart full of donated books through a 5.0 m fong starting area. The…

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Q: 2.7 Problem 23

A:

Q: A car moving at 60 km/h skids 20 m with locked brakes. How far will the car skid with locked brakes…

A: Write the given values with the suitable variables. v1=60 km/hl1=20 mv2=120 km/h Here, v1, l1, and…