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Q1. What would be the equilibrium temperature when a 256 g block of copper at 314 °C is placed in a 140 g aluminium calorimeter cup containing 827 g of water at 11.5 °C?
Q2. A street lamp weighs 145 N. It is supported equally by two wires that form an angle of 120° with each other.
What is the tension of each of these wires?
If the angle between the wires is condensed to 90.0°, what new force does each wire exert?
Write down an expression for the mass of the nucleus
Megan's mass is 27 kg. She climbs the 4.8 m ladder of a slide and reaches a velocity of 3.6 m/s at the bottom of the slide. How much work was completed by friction on Megan? Imagine that air resistance is negligible.
Two boats start together and race across a 62-km-wide lake and back. Boat A goes across at 62 km/h and returns at 62 km/h. Boat B goes across at 31 km/h, and its crew, realizing how far behind it is getting, returns at 93 km/h.
Find out line linking the two point charges
A kid fires water horizontally from a squirt gun held 1.6 above the ground. It hits other kid 2.4 away squares in the back, at a point 0.85 above the ground. What was the initial speed of the water.
A boy is attempting to swim directly across a river; he is able to swim at a speed of 0.421 m/s relative to the water. The river is 2.48 m wide and the boy ends up at 4.77 m downstream from his starting point.
What is the value of g at the location of this satellite. Discover the altitude of the satellite in meters.
Illustrate a new gravitational potential energy
Determine the tension in each string
W hat least energy an incident alpha particle must have to penetrate the gold nucleus. What is the direction of the carbon atom after the collision.
For safety in climbing, a mountaineer uses a nylon rope that is 69 m long and 1.0 cm in diameter. Whilst supporting a 96-kg climber, the rope elongates 1.4 m. Find its Young's modulus.
A 32.0 kg hammer strikes a steel spike 2.70 cm in diameter while moving with speed of 24.0 m/s. The hammer rebounds with speed 11.0 m/s after 0.110 s. What is an average strain in the spike all through the impact.
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