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1. describe the expected pattern of children and young peoples development from birth to 19years to include physical development communication and intellectual developmnet social emotional and behavioural development
Explain how many pellets must be added to 450 g of water that is initially at 20.0°C to make the equilibrium temperature 25.0°C? Neglect any energy transfer to or from the container.
An airplane propeller is rotating at 1250 rpm It takes 4.27×10^-3 s to turn through 32 degrees. At 201 rpm, what is the period of the propeller in seconds
One particle has a mass of 4.42 x 10-3 kg and a charge of +7.35 %u03BCC. A second particle has a mass of 8.69 x 10-3 kg and the same charge. Find the initial separation between the particles
A coin rests 14.0 cm from the center of a turntable. The coefficient of static friction between the coin and turntable surface is 0.440. what is the angular velocity of the turntable
q1. from the shape of total energy vs. time plot what can you conclude about the conservation of mechanical energy in
Identify and explain the three criteria for establishing casue-and-effect relationships between variables. Discuss correlational and experimental designs ability to satisfy these criteria.
The G string of a guitar which should be 397 Hz is playing flat at 380 Hz. What percentage change in the tension of the wire is necessary so as to tune the string to 392 Hz.
A cement block accidentally falls from rest from the ledge of a 81.8 -m-high building. How much time, at most, does the man have to get out of the way
a long horizontal wire carries a current of 48 amps. A second wire, made of 2.5 mm diameter copper wire and parallel to the first, is kept in suspension magnetically 15 cm below. Determine the magnitude and direction of the current in the lower wi..
A projectile is fired with an initial speed of 37.8m/s at an angle of 44.7 degrees above the horizontal on a long flat firing range. Determine the total time in the air
A sample of neon gas has its volume doubled and its temperature held constant. What will be the new pressure relative to the initial pressure? A quantity of steam ( 800 g) at 115oC is condensed, and the resulting water is frozen into ice at 0oC. How ..
Ethyl alcohol (C2H5OH) has a density of806 kg/m3 and a volume of 1.34 10-3m3. Find the number of molecules in the liquid
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