explain why the motion of a body which is moving with constant speed in a circular path is said to be accelerated ?
A bird flies 2.8 due west and then 2.7 due north. Another bird flies 2.7 due west and 2.8 due north. What is the angle between the net displacement vectors for the two birds?
The excitation of an electron on the surface of a photocell required 5.0 x 10 –27 J of energy. Calculate the wavelength of light that was needed to excite the electron in an atom on the photocell
a horse moves a sleigh 1.00 kilometers by applying a horizontal 2000 Newton force on its harness for 45 minutes. what is the power of the horse?
A machine with a mechanical advantage of 10 is used to produce an output force of 250 newtons. What input force is applied to this machine
What do all members of a biological species have in common? A. They can interbreed and produce fertile offspring. B. They are members of the same population. C. They have identical physical characteristics. D. They live in the same geographical location.
What do tire treads, rubber mats, automobile breaks, and tennis shoes have in common. -They reduce friction -they are lubricants -they increase friction -the reduce static electricity
The acceleration of the gravity Moon is equal to one-sixth of Earth's gravitational acceleration times. if an astronaut has a mass of 60 kg, what is the mass ande weight of the astronauts on the moon?
The half-life of carbon-14 is 5,730 years. How many grams of parent material will remain from a 120-gram sample of carbon-14 after 2 half-lives?
A body oscillates with simple harmonic motion along the x-axis. Its displacement varies with time according to the equation x = 0.5 sin (pt+p/3). The acceleration (in m/s2) of the body at t = 1.0 s is approximately a. 3.5 b. 49 c. 14 d. 43 e. 4.3
