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A man consumes 2,536 kcal of food in one day, converting most of it to maintain body temperature. If he loses half this energy by evaporating water (through breathing and sweating), how many kilograms of water evaporate? (Lvap = 580 kcal/kg)
Pendulum. A small rock with mass 0.22 kg is fastened to a massless string with length 0.70 m to form a pendulum. The pendulum is swinging so as to make a maximum angle of 45° with the vertical. A
A 23kg child slides down a 4.0m -high playground slide. What is the change in the thermal energy of the slide and the seat of her pants
A circuit contains a resistor, a 0.0200-H inductor and 0.500microfaraday capacitor in series as shown. The time varying emf is 30.0V at a frequency of 1000Hz. The current flow through the circuit at this frequency is 128mA. Determine the value of the..
Find the energy of the electron in the ground state oftriply ionized beryllium, which has an atomic number Z =4. Find the radius of its ground-state orbit
A ball is thrown from the top of a building upward at an angle of 39degrees to the horizontal and with an initial speed of 24m/s. The ball is thrown at a height of 57 m above the ground and hits the ground 98.55 m from the base of the building. Wh..
Older televisions display a picture using a device called a cathode ray tube, where electrons are emitted at high speed and collide with a phosphorescent surface, How much time does the electron take to travel from the emission point to the screen
A bowling ball encounters a 0.760 meter vertical rise on the way back to the ball rack. Estimate what the translational speed at the top
a cube of wood floating in water supports a 200g mass at the centre of its top face. when the mass is removed, the cube rises by 2cm. determine the volume of the cube
In a heart pacemaker, a pulse is delivered to the heart 78 times per minute. What is the capacitance of the capacitor
A stuntman drives a car over the top of a hill, the cross section of which can be approximated by a circle of radius 160 m. What is the greatest speed at which he can drive without the car leaving the road at the top of the hill?
A 0.5 kg ball is thrown straight up in the air with initial speed of 40 m/s. What is the maximum height reached by the ball
Waves are sent down a 2.00m long string pinned down at both ends setting up standing waves. The equation for these waves is given by, y(x,t) = (0.040m) sin (2pi multiplied by x) cos (200pi mulitplied by t) Find a) the amplitude of the original wave..
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