a. Find the speed of the rock after 4.5 s b. find the distance the rock fell in 4.5 s c. Find the speed of the rock after falling 55 m, neglecting air re...
a. Find the speed of the rock after 4.5 s b. find the distance the rock fell in 4.5 s c. Find the speed of the rock after falling 55 m, neglecting air re...
A lighted candle is placed 38 cm in front of a diverging lens. The light passes through the diverging lens and on to a converging lens of focal length 10 cm that is 5 cm from the diverging lens. The...
Can any one explain this ?
A convex mirror (f1 = −6.30 cm) and a concave mirror (f2 = 9.50 cm) are facing each other and are separated by a distance of 24.0 cm. An object is placed between the mirrors and is 12 cm from each...
2.50 moles of an ideal monatomic gas are compressed from 315,000 Pa to 175,000 Pa at 0.0300 m3. What is the change in internal energy in this isochoric process?
Assuming that the shuttle acts like an ideal source, producing spherical wavefronts, what would the intensity be a distance of 1 km from the shuttle at launch? what does your answer suggest about...
A roulette wheel is 34 inches in diameter. Several people play the game inside a van moving at 25 mph. The speed of the wheel edge relative to the ground is higher on the left side of the van than...
Calculate the cross sectional area of an aluminum wire of resistance 520 Ω, length 24 m, and resistivity 2.65 × 10–8 Ω·m.
A) 1.64 x 104 J B) 3.88 J C) 164 J D) 388 J
And use them to explain how air bags save lives.
A vertical rectangular gate, 3m wide and 2m high is hinged at H. On the left side of the gate, sea water lies up to a height 1.2m above the top of the gate. Whereas on the right side of...
Two ships are 2 mi apart and traveling at 25 knots. The lead ship executes a turn 25° to port(left) at the same time that the trailing ship executes a 25° turn to starboard (right). How...
Within the tertiary cooling system of a pressurised water cooler, a test circuit is set whereby an off-shoot rotor (magnets on a shaft) is required to transmit 3MW of power at 200rpm to a test-monitoring...
A 27.8 gram mass oscillates on the end of a spring and its motion can be described by: (1.5 )sin (21.4 t ) [here the units are standard, meters and seconds] What are the following for...
a. gravitation has been the hardest force to unite with electroweak and strong nuclear interactions. b. until we can detect gravitational waves, it will remain a mystery. c...
At very fast car races the sound of the engine as a car approaches is much different than when it passes you. How fast would the car need to be going to have the change in frequency be one...
Suppose Spider-Man throws a web that is 1.00 m long with a velocity of 0.8c (γ = 5/3) with respect to the Earth. What will be the length of web as observed by J. Jonah Jameson standing on the Earth...
PLease provide a detailed explanation. 1) Suppose that the net external force (push minus friction) exerted on a lawn mower is 51 N parallel to the ground.The mass of the mower is 24kg...
A police car is driving past an observer sitting by the side of the road, what happens to the wavelengths of the siren as measured by the observer while the police car approaches to when he goes away...
Because of friction pendulum clocks need a small driving force, if accidentally it was too large of a driving force and caused a bit too large of an angle of oscillation to be formed what would happen...