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For many years the posted highway speed limit was 88.5km/hr (55mi/hr) but in recent years some rural stretches of highway have increased their speed limit to 104.6km/hr (65mi/hr). In Maine, the distance from Portland to Bangor is 215km. How much time can be saved in making this trip at the new speed limit?
in the problem description is states that neutron is fired into a nucleus and knocks out a particle it collides with in
question a at room temperature what is the strength of the electric field in a 12-gauge copper wire diameter 2.05 mm
A guitar string of diameter 0.79 mm and length 1 m is subject to a tension of 182 N. what is the Young's modulus of the string
A horizontal force of 150 N is used to push a 45.0 kg packing crate a distance of 5.10 m on a rough horizontal surface. If the crate moves at constant speed, find each of the following. (a) the work done by the 150 N force _________J (b) the coeffici..
Find the moment of inertia of a solid uniform sphere of radius R which has a spherical cavity of radius R/2. The spherical cavity is centered at a point R/2 from the center of the sphere. Take the axis of rotation to go through the center of the sphe..
A box of sand, initially at rest, is to be pulled across a floor by means of a cable in which the tension cannot be allowed to exceed 1100N. What should be the angle between the cable and the box in order to pull the greatest mass of sand
to examine a particular blood sample in biology lab a student uses a compound microscope set to have a magnification of
The electromagnetic wave that delivers a cellular phone call to a car has a magnetic field with an rms value of 1.60 10-10 T. How much energy does this wave carry through the window
A 29.0-g object moving to the right at 19.0 cm/s overtakes and collides elastically with a 9.0-g object moving in the same direction at 15.0 cm/s. Find the velocity of each object after the collision
A boy with a mass of 55 kg is hanging from a spring with a spring constant of 240 N/m. With what frequency does the boy bounce up and down
A red blood cell typically carries an excess charge of about -2.5 × 10-12 C distributed uniformly over its surface. How many excess electrons does a typical red blood cell have
The position of a particle in cm is given by x = (7) cos 10?t, where t is in seconds. What is the amplitude of the particle's motion
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