A 6.7 kg object moves with a velocity of 8 m/s. what is its kinetic energy

Which of the following is a closed system or very close to a closed system? A. a block of iron sealed in a vacuum chamber B. a dish of ice cream sitting in the sunlight C. a stick of dynamite during an explosion D. a stalled car in a snowstorm

If your front lawn is 21.0 feet wide and 20.0 feet long, and each square foot of lawn accumulates 1350 new snowflakes every minute, how much snow, in kilograms, accumulates on your lawn per hour? Assume an average snowflake has a mass of 1.90 mg.

A 2200 kg car doubles its speed from 50 km/hr to 100 km/hr. By how many times does the kinetic energy from the car's forward motion increase?

A 70.0 kg ice hockey goalie, originally at rest, has a 0.170 kg hockey puck slapped at him at a velocity of 33.5 m / s. Suppose the goalie and the puck have an elastic collision, and the puck is reflected back in the direction from which it came.

Displacement is the change in velocity of an object. True or false

When a certain isotope, such as U-238, is hit by a neutron, it will always split into the same smaller nuclei. true or false?

A person walks 7 feet east stops and walks 7 feet west

Using the drop-down menus, choose the right government service to complete each sentence. Providing a free public education for all children is an example of supporting. Fighting fires is one way in which the government ensuresfor citizens.

A galilean telescope adjusted for a relaxed eye is 36cm long. If the objective lens has a focal length of 40cm, what is the magnification?

If a car goes along a straight road heading east and speeds up from 45 ft/s to 60. ft/s in 5 sec, calculate the acceleration