Question 1 1 / 1 point kinetic energy is the energy of
question options:
mass
motion
work
speed
question 2 1 / 1 point what two factors determine an objects kinetic energy?
question options:
mass and speed
size and speed
height and speed
mass and height
question 3 1 / 1 point kinetic energy can be passed from one object to another when objects collide,
question options: true false question 4 1 / 1 point a 50 pound boy is moving at a speed of 5 miles per hour and a 30 pound girl is moving as a speed of 5 miles per hour, who has the greatest kinetic energy?
question options:
the boy
they both have the same kinetic energy
the girl
there is not enough information to determine who has the most kinetic energy
question 5 1 / 1 point think about a girl on a swing. when is the kinetic energy of the girl zero?
question options:
when she stops moving at the top of the swing
it is never zero
when the girl is swinging backwards
at the bottom of the swing
question 6 1 / 1 point if a car is at a stop sign it has kinetic energy.
question options: true false question 7 1 / 1 point one object has a speed of 1 mph and another object has a speed of 3 mph. if the masses are the same, which of the following is true about their kinetic energy?
question options:
the object greater speed has the lower kinetic energy
the object with the greater speed has greater kinetic energy
their speeds are the same.
the object with the smaller mass has the greater kinetic energy
Aperson stands on a platform, initially at rest, that can rotate freely without friction. the moment of inertia of the person plus the platform is ip. the person holds a spinning bicycle wheel with its axis horizontal. the wheel has moment of inertia iw and angular velocity ωw. take the ωw direction counterclockwise when viewed from above. part a what will be the angular velocity ωp of the platform if the person moves the axis of the wheel so that it points vertically upward?
The vapour pressure of benzene is 53.3 kpa at 60.6 °c, but it fell to 51.5 kpa when 19.0 g of a non-volatile organic compound was dissolved in 500 g of benzene. calculate the molar mass of the compound.