An object with a mass of 100 grams is dropped from a certain height and has a velocity of 60 meters/second. if the potential energy of this object is 179.99 joules, how high was the object when it was dropped?

Why shouldn't we look at the sun directly? 100pts

The plot of velocity versus time is a horizantal line between, (0, 4), and (5, 4). Time is measures in seconds and velocity in meters per second. What is the position at t=5 s if the position at t=0 was 6 m?

Use the data provided to calculate the amount of heat generated for each cylinder height.

Electric current from a generating plant is what

Which statement correctly compares sound and Electromagnetic waves? A. Both EM and sound waves need matter to carry energy from one place to another. B. Neither EM nor sound waves need matter to carry energy from one place to another. C.

Assume you are a Medieval knight attacking a castle with a cannon. The ball leaves the cannon with a speed of 47.7 m/s. The barrel's angle with respect to the ground is 43.

0.005 kg of copper was heated from 20°C to 80°C. How much energy was used to eat Cu? (Specific heat capacity of Cu is 385 J/kg °C)

Assuming that the bohr model is valid, what is the kinetic energy of a photoelectron liberated by a photon with a the given wavelength from a state with given z and n

Compare the acceleration of a motorcycle that accelerates from 80 km/h to 90 km/h

Do you think you would like to do arson or explosion investigation or evidence testing? Why or why not?