Tuesday
March 31, 2015

Homework Help: science(check answers)

Posted by matt on Wednesday, March 5, 2014 at 1:13pm.

can someone check my answer thanks !


2.The ability to do work or cause change is called

A.velocity.
B.energy.(I PICK B.)
C.transfer.
D.friction.


3.Which type of energy is demonstrated by a person jogging?

A.electrical energy
B.nuclear energy
C.electromagnetic energy
D.kinetic energy(I PICK D)


4.Which is the type of energy available in food?

A.electromagnetic
B.gravitational
C.chemical(I PICK C)
D.kinetic


5.Dan does 188.0 J of work raking leaves. If the rake does 128.0 J of work, what is the efficiency of the rake?

A.68.1 percent(I PICK A)
B.147.0 percent
C.60.0 percent
D.316.0 percent


6.Which type of energy transformation is taking place when natural gas is used to heat water?

A.chemical energy into thermal energy(I PICK A)
B.thermal energy into mechanical energy
C.mechanical energy into electromagnetic energy
D.electromagnetic energy into chemical energy


7.The energy associated with the motion and position of an object is called

A.kinetic energy.
B.potential energy.
C.gravitational potential energy.
D.mechanical energy.(I PICK D)
****I ACTUALLY HAD 2 CHOICES FOR 7 SO MY OTHER ANSWER IS A*****

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