Physics

A carpenter tosses a shingle off a 9.4 m high roof, giving it an initial horizontal velocity of 7.2 m/s.] How far does it move horizontally in this time
1 Answer
A rocket takes off from a space station, where there is no gravity other than the negligible gravity due to the space station, and reaches a speed of 110 m/s in 10.0 s. If the exhaust speed is 1,600 m/s and the mass of fuel burned is 118 kg, what was the initial mass (in kg) of the rocket?
1 Answer
what would its landing speed have been in the absence of air resistance? express your answer using two significant figures.
1 Answer
what was the ratio of a weight to its just noticeable difference weight when they were lifted what was the ratio of a weight to its just noticeable difference weight when the weight were placed in the subject's hands?
1 Answer
if a 2000-kg car traveling at 30 m/s hits a wall and comes to a complete stop in 0.03 seconds, how much force was applied to the car?
1 Answer
How Would Newtons laws 1&2 improve a balloon car
2 Answers
A hairdryer has a power of 1.5 KW and was used for 15 minutes how much did it cost?
1 Answer
Two trains are moving in the same direction on parallel tracks. Train A is 300 m long and moves at 10 m/s. Train B is 250 m long and moves at 8 m/s. The front of train B is 1 km ahead of the front of train A. How far does Train A travel while both trains overlap?
1 Answer
What is the transfer of thermal energy called?
1 Answer
always tangent to the track, causes the car to speed up as it goes around. if it starts from rest, its speed at the end of one revolution is:
1 Answer
how long must a 0.70- mm -diameter aluminum wire be to have a 0.42 a current when connected to the terminals of a 1.5 v flashlight battery?
1 Answer
is there an advantage to following through when hitting a baseball with a bat, thereby maintaining a longer contact between the bat and the ball?
1 Answer
determine the current (in ma) through the led in the circuit below if the forward biased voltage of the led is 2 v?
1 Answer
what is the magnitude and direction of the force on the vertical wire segment on the left side of the square? the magnitude should be written in terms of i, l, and b, or could be zero, and the choices of direction are: left, right, up, down, in, out.
1 Answer
which of the following has the greatest momentum? 10.0 kg mass moving at 30 m/s 3000 kg mass moving at 0.2 m/s 0.05 kg mass moving at 200 m/s 200 kg mass moving at 2 m/s
1 Answer
A loudspeaker of mass 15.0 kg is suspended a distance of h = 1.00 m below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 2.70 m . 1. What is the tension T in each of the cables?Use 9.80 m/s2 for the magnitude of the free-fall acceleration.
1 Answer
What might happen if people did not have the rights established in Miranda v. Arizona
1 Answer
suppose you are standing on a train accelerating at 0.30 g . part a what minimum coefficient of static friction must exist between your feet and the floor if you are not to slide?
1 Answer
A stuntman of mass 55 kg is to be launched horizontally out of a spring- loaded cannon. The spring that will launch the stuntman has a spring coefficient of 266N / m and is compressed 5 m prior to launching the stuntman. If friction and air resistance can be ignored, what will be the approximate velocity of the stuntman once he has left the cannon?
1 Answer
radiative energy is: group of answer choices energy used to power home radiators. energy carried by light. energy from nuclear power plants. energy of motion. heat energy.
1 Answer
An unpolarized laser beam enters a container of water. The beam is partially reflected from the water-glass surface, as indicated in the figure below. For what angle of incidence will this reflected beam be completely polarized? [image attached below]
1 Answer
(a) calculate the (time-averaged) energy density of an electromagnetic plane wave in a conducting medium. show that the magnetic contribution always dominates (b) show that the intensity is (k/2uw)e0^2
1 Answer
how long does it take to accelerate to 60 mph ? your answer, which seems impossibly short, is confirmed by track tests.
1 Answer
460miles per hour with the wind nd 420 per hour gainst the wind
1 Answer