A 0.30-kg block of wood is suspended on a spring. In equilibrium the wood stretches the spring 2.0 cm downward
The wood is then pulled an additional distance of 1.0 cm down and released from rest.
(a) How long does it take the wood to make 3 complete cycles of vibration?
(b) How much total mechanical energy does this system contain if we choose the total potential energy (elastic and gravitational) to be zero at the equilibrium position of the hanging block?
(a) 0.84 s (b) 7.4 mJ
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As a spaceship is moving toward Earth, an Earthling measures its length to be 325 m, while the captain on board radios that her spaceship's length is 1150 m
(c = 3.00 × 108 m/s) (a) How fast is the rocket moving relative to Earth? (b) What is the TOTAL energy of a 75.0-kg crewman as measured by (i) the captain in the rocket and (ii) the Earthling?
What is the difference between velocity and speed?
A. There is no difference, they are both vectors. B. Speed is a scalar and velocity is a vector. C. Speed is a vector and velocity is a scalar. D. There is no difference, they are both scalars.
Electric potential energy is measured in
1) amperes. 2) volts. 3) joules. 4) watts and electric potential is measure in 5) amperes. 6) volts. 7) joules. 8) watts
Once carbon is formed in massive star cores, the majority of nuclei formed from then on will belong to even numbered elements, due to addition to more helium nuclei as alpha particles
Indicate whether the statement is true or false