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A right triangle has a hypotenuse of length 3 m, and one of its angles is 30. What is the length of (a) the side opposite the 30 angle and (b) the side adjacent to the 30 angle?
What numerical value does she obtain for v1i on the basis of her measured values of x 257 cm and y 85.3 cm? What factors might account for the difference in this value compared with that obtained i
How many penguins of mass 22 kg can stand on the ice before they get their feet wet?
Explain how the magnitude of the resultant can be measured with a ruler and the orientation can be measured with a protractor.
A 10 kg bullet is fired horizontally into a 300g wooden block initially at res on a horizontal surface andbecome embedded in it. The coefficient of friction between block and surface is (0.50). The
Explain why the back side of an aquarium can appear to be silvery and reflective from some directions, even though you can see through it from other directions.
A 89 kg astronaut and a 1200 kg satellite are at rest relative to the space shuttle. The astronaut pushes on the satellite, giving it a speed of 0.24 m/s directly away from the shuttle. Seven-and-a
You push a 1.8 kg block against a horizontal spring, compressing the spring by 26 cm. Then you release the block, and the spring sends it sliding across a tabletop. It stops 90 cm from where you re
The length of each rod, while the third carries charge -63nC, also uniformly distributed along the rod. What is the magnitude of the electric field at the center of the triangle?
A container of volume 23.0 cm3 is initially filled with air. The container is then evacuated at 0oC to a pressure of 30 mPa. How many molecules are in the container after evacuation if we assume th
The Big Bang and comparing these predictions with observations. Four of the five statements below are real. Which one is fictitious?
A hawk flies in a horizontal arc of radius 12 m at a constant speed of 4 m/s. find its centripetal acceleration. it continues to fly along the same horizontal arc but steadily increases its speed a
What is the minimum number of photons per second that an owl eye can detect if its pupil has a diameter of 8.5 mm and the light has a wavelength of 510 nm?
what are the (a) magnitude and (b) direction of the displacement, the (c) magnitude and(d) direction of the average velocity and the (e) magnitude and (f) direction of the average acceleration?
What is the total work done on the block by the force of friction as the block moves a distance 10.0m up the incline?
A hydraulic cylinder moving a robotic arm has a diameter of 5.0 cm and can exert a maximum force of 5.6 kN. (a) What pressure must the hydraulic lines be capable of withstanding?
A flashlight is a simple circuit with only two batteries, a bulb, and a switch. When the flashlight is on, current flows through these objects, one after the next, over and over again. When you turn
Using stationary state perturbation theory in small U , find the energy shifts/splitting of the ground state and the first excited state in terms of the matrix elements of U.
A soccer ball of diameter 31 cm rolls without slipping at a linear speed of 2.8 m/s. Through how many revolutions has the soccer ball turned as it moves a linear distance of 18 m?
Find the frequency of a sound wave moving through iron at 25°C with a wavelength of 0.665 m.
What is its wavelength as observed at Earth (give your answer in nm or )? (c) What kind of light is this: X-ray? Ultraviolet? Optical? Infrared?
A 79 kg pole-vaulter falls from rest from a height of 4.6 m onto a foam-rubber pad. The pole-vaulter comes to rest 0.30 s after landing on the pad. Calculate the athlete's velocity just before reac
A cannonball launched with an initial velocity of 151 m/s at and angle of 35° follows a parabolic path and hits a balloon at the top of its trajectory. Neglecting air resistance, how fast is it
What is the final temperature of the water and the glass in C (specific heat of water =1.00 cal/g C, specific heat of glass =0.200 cal/gm C)?
Draw the force vectors to some suitable scale showing the relative forces acting on the stone. B. Which is the longer vector, and why?