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How much work is required to stop an electron (m = 9.11 multiplied by 10-31 kg) which is moving with a speed of 1.72 multiplied by 106 m/s? Could you please explain?
A bat can detect small objects such as an insect whose size is approximately equal to one wavelength of the sound the bat makes. If bats emit a chirp at a frequency of 68.2 kHz, and the speed of soun
After the gas is ejected, the mass of the astronaut (now wearing a partially empty propulsion unit) is 165 kg. What percentage of the gas propellant in the completely filled propulsion unit was depl
If a free electron is released at rest from the negative plate, find its speed when it reaches the positive plate. Find the time it takes the electron to travel across the 2.2 mm gap.
How many excess electrons must be present on each sphere if the magnitude of the force of repulsion between them is 4.57x10^-21 newtons?
A package has mass of 200 kg is on a horizontal floor. Resistance to its motion other than that due to friction is negligible. The first attempt to move the package is by pulling it with a force of
A hospital patient has been given 131I (half-life = 8.04 days) which decays at 6.3 times the acceptable level for exposure to the general public. How long must the patient wait to reach the acceptab
You are shooting a basketball into a hoop of diameter d that is located l meters away and h meters high. Assume that the horizontal distance to the hoop is measured with its center and you and your
A current of 0.300 A through your chest can send your heart into fibrillation, ruining the normal rhythm of heart beat and disrupting the flow of blood (and thus oxygen) to your brain. If that curre
For what value of Q (in µC) will the moving particle execute circular motion? (Neglect the gravitational force on the particle.)
The wavelength of one sound wave is 0.81 m. The wavelength of a second sound wave is a little bit longer. When the two sound waves are superimposed on each other, we hear a 1.1 -Hz beat.
How far (cm) from the end of the string should I put my finger if I want the pitch of the note to be 539 Hz?
The speed of sound in aluminum is 5000 m/s. We excite standing waves in a rod of aluminum 1.30 m long such that there is an antinode at each end of the rod and only one node half-way between. Find t
Suppose we excite a two-loop standing wave in a rope using tension of 1.14 N. What tension (N) should we apply to the rope if we want to excite a one-loop standing wave with the same frequency?
A long spring is stretched and attached to two walls 5.42 m apart. The mass of the spring is 276 g. The tension in the spring is 8.7 N. What will be the frequency (Hz) of a standing wave with three
How far (cm) did he move the speaker to the point where I heard a minimum intensity due to destructive interference of the sound waves from the two speakers? The speed of sound is 343 m/s.
The third putt is 0.50 m due north. What displacement (magnitude and direction relative to due east) would have been needed to "hole the ball" on the very first putt?
The speed of light in one such medium was recorded as 60.15 km/hr. (a) Find the index of refraction of this medium.
The speed of an object and the direction in which it moves constitute a vector quantity known as the velocity. An ostrich is running at a speed of 20.7 m/s in a direction of 74° north of west.
A steel wire of length 1.93 m with circular cross section must stretch no more than 0.240 cm when a tensile (stretching) force of 450 N is applied to each end of the wire. What minimum diameter is r
A moth flies a distance of 3 m in only one-third of a second. What does the ratio 3/(1/3) tell you about the moth's motion? What does the (1/3)/3 tell you about the moth's motion? How far would the
If the coefficient of volume expansion of mercury is beta Hg = 1.80*10^-4/K, compute beta glass, the coefficient of volume expansion of the glass.
A cylinder contains 3.2L of oxygen at 340K and 2.6 atm . The gas is heated, causing a piston in the cylinder to move outward. The heating causes the temperature to rise to 650K and the volume of th
In the simulation above the length and orientation of the blue and yellow vectors can be changed by dragging the tips of the vectors. Given the limits available in the simulation, find the followin
If the snow is level at the foot of the incline and has the same coefficient of friction, how far will the ski travel along the level?