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a. A healthy young man standing at a distance of 7 m from a ll"8 m high building sees a kid slipping from the top floor. With what speed (assumed uniform) should he run to catch the kid at the arms height (1"8 m) ?
A flint glass plate (n = 1.66) rests on the bottom of an aquarium tank. Calculate the apparent thickness of the plate as viewed from above the water
A 0.03 kg bullet hits asteel plate and melts and splatters on impact. Assuming thatthe bullet recieves 80% of the collision energy, at what minimium speed must it travel to melt on impact?
Find out the frequency of a sound wave moving through iron at 25 degrees Celsius with a wavelength of 0.601m.
The force of gravity acting on the arm acts through point A. Identify the magnitudes of the tension force t in the deltoid muscle and the force s of the shoulder on the humerus (upper-arm bone) to hold the arm in the position shown.
A freshly prepared sample of a certain radioactive isotope has an activity of 10.0 mCi. After 4.50 h, the activity is 7.80 mCi. Find the decay constant and half-life of the isotope
A circular loop carries a current I. It is placed in a constant magnetic field in such a way that the field lines are perpendicular to the lane of the circle
A tube is sealed at both ends and contains a 0.0100-m longportion of liquid. The length of the tube is larger compared to0.0100-m. Find the angular speed (in rad/s) of the tube
A thin rod of length 0.80 m and mass 210 g is suspended freely from one end. find the rod's kinetic energy at its lowest position
You are driving a car which is heading 25 m/s towards a brick wall. You sound a horn which emits at a frequency of 500 Hz when at rest. What is the beat frequency that you hear
q1. every day our earth receives 1.55times1022 j energy from the sun. if we were able to use 0.85 percent of this
What angle in radians is subtended with an arc 1.40 m in length on the circumference of a circle of radius 2.30 m? What is this angle in degrees? The angle among two radii of a circle with radius1.50 m is 0.600 rad. What length of arc is intercepted ..
A champion archer hits a bullseye in a target mounted on a wall a distance L away and situated at a height h above his bow. Deduce the equation between the speed (at which the arrow left his bow), the arrow's initial angle θ with the horizontal, th..
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