I have a stupid doubt.Let's suppose that I am driving a car, and you are stationary on the ground.From my point of view,I see that the world around me that,i.e., earth moving with velocity 'v'.Then...

I have a stupid doubt.Let's suppose that I am driving a car, and you are stationary on the ground.From my point of view,I see that the world around me that,i.e., earth moving with velocity 'v'.Then...

A certain horse can maintain 1.0 hp of output for 2.4 hours with an efficiency of 72%. The horse is pulling a 220 kg object along a horizontal ground. The coefficient of kinetic friction between the...

A 0.80 kg block starts from rest above a 6 m slide and slides down. The block strikes the ground at a horizontal distance "d" from the end of the slide 0.30s after leaving the slide. What...

A 49kg bicycle rider delivers an average of 0.28 hp. The mass of the bicycle is 2.1kg and the hill she is climbing is 245m tall. How much time will this take?

Inclined wooden plane by 45º with repect to the table top by placing books under the other edge of the plane. the height of the top of the the wooden plane to the table is 23 cm and the height from...

A waterfalls is 90m high. Assume that all of the potential energy possessed by the water at the top is completely converted to heat energy. What will be the temperature difference between the water...

Finding the air resistance.

Energy of a covalent bond is approximated as: Vb (rij) =1/2 kijb [( rij-bij)]2 Calculate the force acting on atoms as a function of interatomic distance.

An asteroid with a mass of 5.0 x 105 kg collides with the Earth and slides horizontally along the ground without bouncing (not actually possible but just pretend). The velocity of the asteroid before...

A particle of mass m = 10kg moves along a straight line under the action of force F = λ/x4 , where λ is some constant. A measurement shows that the particle passes the point x = 1m with...

Please answer fast

I don't understand enthalpy? could someone help

Hey there, I have been given the mass of water and the time and told to work out the energy supplied. MASS OF WATER M(KG) ...

A .500 kg mass is oscillating on a spring with k= 330 N/m. The total energy of it's oscillation is 3.24 J. What is the speed of the mass when it is .100 m from the EP?

A .150 kg mass is attached to a spring with k=18.9 N/m. At the equilibrium position, it moves 2.39 m/s. How mych mechanical energy does it have?

Help!!!! I don't understand

could someone help?

A girl exerts a force of 45 N at an angle of 30˚ above the horizontal along the handle of her wagon as she pulls it 25 m across the sidewalk. How much work does she do?

A force of 3.7 N is exerted on a 105-gram hockey puck over a distance of 2 meters. If it was initially at rest, what is the final speed of the hockey puck?

A pinball machine uses a spring with a spring constant 120 N/m to launch a 50-gram ball before playing the game. If the ball launcher is pulled back a distance of 4.2 cm and then released, how fast...