Their energy level depends upon how they are generated (i.e. what radioactive decay). For specific energies, see wikipedia http://en.wikipedia.org/wiki/Radioactive…
Passenger jets have a pressurized cabin during flight for passenger/crew safety and comfort.
If the cabin is pressurized to 6,500 m (that is the pressure that corresponds to an altitude of
6.5 km fo
I have an exam soon about waves and the electromagnetic spectrum. While I was studying I came across the rule ofA change in wave speed causes a change in wavelength as the frequency cannot change. I t
A motorist travels at a constant speed of 38.0 m/s through a school zone, exceeding the posted speed limit. A policeman waits 7.0 s before giving chase at an acceleration of 3.5 m/s^2.
Find the time
A hot-air balloonist, rising vertically with a constant velocity of magnitude v = 5.00m/s , releases a sandbag at an instant when the balloon is a height v = 40.0m above the ground . After it is relea
A toy consists of three cars that are pulled in tandem on small frictionless rollers.The cars have masses m1=3.1 kg, m2=2.4 kg, and m3=1.2 kg.If they are pulled to the right with a horizontal force P=
The driver of a car traveling at 110 km/h slams on the brakes so that the car undergoes a constant acceleration, skidding to a complete stop in 4.5 s. What is the average acceleration of the car durin
Two blocks each of mass m = 3.30 kg are fastened to the top of an elevator as in the figure below.
(a) If the elevator accelerates upward at 1.6 m/s2, find the tensions T1 and T2 in the upper and lowe
A ball is thrown into the air and follows a parabolic trajectory. Point A is the highest point in the trajectory and Point B is a point as the ball is falling back to the ground. Choose the correct re
A tortoise can run with the speed of 11.0 cm/s, and a hare can run 20 times as fast.In a race, they both start at the same time, but the hare stops to rest for 1.0 minutes. the tortoise wins by 10.0 c
Part1:
What is its final velocity?
Answer in units of m/s.
Part2:
How far will it have traveled in that time?
Answer in units of m.-248+13*9.4= 370.2 m/s
v^2=u^2+2as
370.2^2=248^2+2*13*s
s=(370.2^2
Two forces F1 and F2 are acting on a mass M=3kg. The force F1 = 5i + 4j + 7k, in N. The acceleration of the mass is given by a = 3i + 7j + 5k, in m/s2. Calculate the magnitude of F2?
Is the magnitude
Of an object held up by a string
m = 2.37 kg
a = 3.70 m/s
I calculated and got 18.6 N, but apparently thats wrong. :(:(:(
Also there was another where m = 1.19, and a = (4.81 - 2.61) / 2.4
I got 13.
This is from a past exam:
An airplane is flying horizontally at a constant height h=300 m, with speed v = 50m/s.At time t = 0, a rock is dropped from the airplane when it is directly over a tower so
A 2 kg mass on a frictionless inclined surface
is connected to a 2.1 kg mass. The pulley is
massless and frictionless, and the connecting
string is massless and does not stretch. The
2.1 kg mass is ac
