Acceleration of the box across the floor
A large box whose mass is 20 kg rests on a frinctionless floor. A mover pushes on the box with a force of 250 N at an angle of 35 degrees below the horizontal. What is the acceleration of the box across the floor?
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A 4.00-kg model rocket is launched, expelling 60.0 g of burned fuel from its exhaust at a speed of 670 m/s. What is the velocity of the rocket after the fuel has burned?
a sample of of myoglobin with mass 1.00g is dissolvd in 100ml of aqeous solution. Theosmotic pressure of the solution is 11.0 torr at 25.00degree celcius . find the molar mass of myoglobin ?
The stone is moving around the path at a constant frequency of 2.20 rev/sec. At the moment the stone is overhead, the stone is released. The magnitude and direction of the velocity of the stone when it leaves the circular path is ??
It takes 480. J of energy to raise the temperature of 103.1 g mercury from 20.0°C to 53.5°C. Calculate the specific heat capacity and the molar heat capacity of mercury.
A 61.9 kg person jumps from rest off a 2.86 m-high tower straight down into the water. Neglect air resistance during the descent. She comes to rest 1.13 m under the surface of the water. Determine the magnitude of the average force that the water
A strip of aluminium of mass 23.8 g is dropped into a beaker of dilute hydrochloric acid. Calculate the work done (in J) on the surrounding atmosphere (1atm pressure, 19.9 oC) by the evolution of hydrogen in the subsequent reaction.
If an object has a moment of inertia 21 kg·m2 and rotates with an angular speed of 111 radians/s, what is its rotational kinetic energy?
Two identical flutes produce fundamental notes of frequency 300 Hz at 27 degre3es. if the temperature of the air in one flute is increased to 31 degrees, what will be the number of beats heard per second?
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