The moon's mass is 7.34x10-kg and it is 3.8x10m away from earth. Calculate the gravitational force of attraction between earth and moon
The energy required to lift two skiers to the top of the mountain is 240 000 J. The electric motor has an efficiency of 40%. Calculate the energy wasted in the motor.
Physics Help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! It is estimated that 1.0 kg of body fat will provide 3.8 × 107 J of energy. A 60-kg mountain climber decides to climb a mountain 4000 m high. (a) How much work does the climber do against gravity in climbing to the top of the mountain? The answer for this is 2.4x10^6 (b) If the body’s efficiency in converting energy stored as fat to mechanical energy is 25%, determine the amount of fat the climber will use up in providing the energy required to work against the force of gravity. The answer is 0.25kg I got a) but I don't understand how to do b)
Will all the bulbs have the same brightness in a series circuit no matter how many? Does it matter how many bulb there are?
Assume that you have a mass of 50.0kg and earth has a mass of 5.97x10kg.The radius of earth is 6.38x10m.What is the force of gravitational attraction between you and the earth
What is the angle between a rigid object and the force applied to it that yields torque using the equation T=Fd?
Which statement correctly describes a chemical reaction? Reactants come out of a reaction. Energy is always released. Bonds between atoms break and new bonds form. Products go into a reaction.
Two bowling balls each have a mass of 6.9-kg.They are located next to each other with their centers 21.8-cm apart.What gravitational force do they exert on each other
Substances whose atoms readily give up electrons are considered to be which of the following? A) Highly ductile B) Good insulators C) Highly malleable D) Good conductors
Which of the following describes work? Energy acts on an object. Force acts on an object. Force acts on an object and causes a displacement of that object. Friction only acts on an object and causes a displacement of that object.
What is the first step in using a balance beam scale? A) Zero the balance B) Record the mass values C) Put the mass on the tray D) Use the counter weights and dual to balance the scale.
Use the fact that the speed of light in a vacuum is about 3.00 × 108 m/s to determine how many kilometers a pulse from a laser beam travels in exactly twelvehours.
The equation that is used to solve second law problems is # F= ma. ( A) what does of each variables mean? F= --------'-------- M= ------------ a----------------- (B) what unit of measurement must be used with each variable?? F=------------- M=----------------- a= -------------
