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Q1. A radio station broadcasts at a frequency of 600,000 Hz. Know that radio waves have a speed of 3.00 x 10^8m/s, what is wavelength of these waves?
Q2. A flight attendant pulls her 70.0 N flight bag a distance of 257 m along a level airport floor at a constant speed. The force she exerts is 37.0 N at an angle of 52.0° above the horizontal.
(a)Find out the work she does on the flight bag.
(b) Find out the work done by the force of friction on the flight bag.
(c) Find out the coefficient of kinetic friction between flight bag and floor.
Find density of the object
Starting with a pure Sr-90 sample at time t=0, a researcher finds that the Y-90 activity is 22.9 mCi at t = 1 day. What was the activity at t = 0
What mass (in grams) of steam at 100°C should be mixed with 257 g of ice at its melting point, in the thermally insulated container, to produce liquid water at 84.0°C.
At the top of a giant swing on the gymnastics high bar, Candy's velocity is 1 m/s, and she is 3.5 m high. what is her total mechanical energy at this instant
A high energy photon is scattered at an angle of ?=180.0° from an electron that is initially at rest. Find the energy of the incident X-ray photon
A 29? and a 41? resistor are in series, Find the current when this series combination is connected across a 12V battery
A parallel combination of a 1.09-?F capacitor and a 2.81-?F one is connected in series to a 4.33-?F capacitor. This three-capacitor combination is connected to a 15.3-V battery
A hot-air balloon has just lifted off and is rising at the constant rate of 2.4m/s. how high is she when the camera reaches her
The magnitude of the electrostatic force between two identical ions of mass 1.224×10-25 kg that are separated by a distance of 6.50 nm is 1.770×10-9 N. Calculate the electric field at the site of each ion
The displacement of an object moving under uniform acceleration is some function of time and the acceleration. Suppose we write this displacement as s=ka^mt^n, where k is the dimensional constant. Show by dimensional analysis that this expression ..
How long can craft hover over the moon surface Contract between Einstein's calculations and observed precession
Two people stand 5.20 m apart and 4.00 m away from a large plane mirror in a dark room. At what angle of incidence should one of them shine a flashlight on the mirror so that the reflected beam straight strikes the other person.
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