Master Physics with Fun Quizzes & Brain Teasers!

A 0.3 kg ball attached to a rope of length 2 m is swung in a vertical plane. If the Tension at the top is 2.6 N find the speed of the ball.
1 Answer
Which one of the following statements about the movement of an object with zero acceleration is true? A) The object must be at rest.B) The object may be slowing down.C) The object may be in motion.D) The object may be speeding up
1 Answer
An Olympic sprinter runs two laps around an 800 m circular track in 5 minutes.What is the sprinter's displacement after she returns to her initial position?OOO0m800 m160 m1,600 m
1 Answer
184) you are standing on a skateboard, initially at rest. a friend throws a very heavy ball toward you. 184) you can either catch the object or deflect the object back toward your friend (such that it moves away from you with the same speed as it was originally thrown). what should you do in order to maximize your speed on the skateboard?
1 Answer
what instrument can be used to hold a cotton ball used to disinfect the eyes? groove director separator spring forceps aneurysm hook
1 Answer
wind gusts create ripples on the ocean that have a wavelength of 3.43 cm and propagate at 8.87 m/s. what is their frequency (in hz)?
1 Answer
a 10-ohm resistor has a 5-a current in it. what is the voltage across the resistor? a. 5 v b. 10 v c. 15 v d. 20 v e. more than 20 v
1 Answer
according to the general theory of relativity applied to the universe as a whole, the redshift of the galaxies is correctly interpreted as
1 Answer
a simple pendulum is 4.00 m long. (a) what is the period of small oscillations for this pendulum if it is located in an elevator accelerating upward at 6.00 m/s2?
1 Answer
171) a force of 16.88 n is applied tangentially to a wheel of radius 0.340 m and gives rise to an angular 171) acceleration of 1.20 rad/s2. calculate the rotational inertia of the wheel.
1 Answer
the force between between two objects increases by what factor if the distance between them is changed 4.5 times the original separation?
1 Answer
a box is dropped onto a conveyor belt moving at 2.4 m/s. the acceleration of gravity is 9.8 m/s 2 . if the coefficient of friction between the box and the belt is 0.4, what distance does the box move before it moves without slipping? answer in units of m.
1 Answer
the moon illusion can best be explained in terms of the relationship between a relative motion and relative height. b. atmospheric air pressure and diffusion of light waves. c. place theory and frequency theory. d. perceived distance and perceived size. e. proximity and closure.
1 Answer
calculate the energy in joules released by the fusion of a 2.75 -kg mixture of deuterium and tritium, which produces helium. there are equal numbers of deuterium and tritium nuclei in the mixture.
1 Answer
the leaning tower of pisa is 55 m high and 7.0 m in diameter. the top of the tower is displaced 4.5 m from the vertical. how much more would the top have to be displaced for the tower to be on the verge of tipping? assume the tower is a uniform cylinde
1 Answer
a 9.00-kg hanging block (m2) is connected by a string over a pulley to a 5.00-kg block that is sliding on a flat table (m1). if the coefficient of kinetic friction is 0.200, find the tension in the string.
1 Answer
programmable array logic (pal) has fixed or and programmable and array gates.group of answer choicestruefalse
1 Answer
tunneling is a variation of techniques used to achieve higher degrees of privacy for browsing on the internet
1 Answer
A fisherman has caught a fish on his pole, and to keep the pole steady he has to apply an upward force of F2 = 235 N at an angle of 60.5 with respect to the pole (see figure). The length of his pole is 3.5 m, and he is holding it a distance 0.45 m from the end, where he is applying a downward force F1.Randomized VariablesF2 = 235 N = 60.5L = 3.5 md = 0.45 m
1 Answer
9. What is the mass of a sky diver falling at a velocity of 52 m/s who has a kinetic energy of97344 Joules?
1 Answer
photovoltaic cells . select one: a. are increasingly costly produce which precludes major commercial application b. rely on the electrical current produced when silicon is struck by sunlight c. require an outside source of electricity to generate electricity on their own d. have small rotational generators built into every cell
1 Answer
. a string has a mass of 12.5 g. the string is stretched with a force of 9.63 n, giving it a length of 1.89 m. then, the string vibrates transversely at precisely the frequency that corresponds to its 4th normal mode. what is the frequency of the standing wave? (a.) 42.9 hz (b.) 25.9 hz (c.) 32.6 hz (d.) 40.4 hz (e.) none of the above
1 Answer
based on this image alone, approximately how much of the galaxy's total mass is located within 5 kpc of the center, would you say?
1 Answer
the tires on a car have a radius of 31 cmcm. part a what is the angular speed of these tires when the car is driven at 14 m/sm/s ?
1 Answer