To what temperature should an aluminum bar be heated in order to increase its length by 1% in relative to length at O°C? alpha is =2.4× 10⁵ 1°C
Two ropes are tied to a fixed nail. The tension in the ropes is 10N and 20N respectively, while the angle between them is 120 degrees. Calculate the magnitude and direction of the reaction to the nail.
A man fired a bullet from the top of a tree whick is 64m tall. The bullet is fired with а velocity of 70ms-1 and angle of 35° to the horizontal line from the eye view of the man. If Sitting position the man is 0.8m Tall. Find the maximum height reached from the ground.
a 30 tonne lorry changed velocity from 5m/s to 15m/s in 30 seconds (1 tonne = 1000 kg) . calculate the force accelerating the lorry
✪ Question 2.8 Sketch a distance-time graph to show this: "The car travelled along the road at a steady speed. It stopped suddenly for a few seconds. Then it continued its journey, at a slower than before. speed
Which of the following are true regarding Newton’s first law of motion? I. It is also called as law of inertia II. An object accelerates only if it is acted upon by an unbalanced force III. An object is at equilibrium if it at rest IV. An object is in equilibrium if it moves with constant velocity
1. If a ball of mass 0.4kg and radius 0.5m is rolling along a level surface without slipping, calculate thea. rotational kinetic energy of the ballb. translational kinetic energy of the ballc. total kinetic energy of the ball
The velocity of a car A relative to a car B is 15.0km/hr in the direction of N30°E. If the velocity of a car B is 30km/hr in the direction N45°W. Determine the actual velocity of car A and it's direction.
A dancer is applying make-up using a concave mirror. The dancer's face is 35 cm in front of the mirror, and the image is 72 cm behind the mirror. Use the mirror equation to calculate the focal length of the mirror.
A projectile is launched is a speed of 10√2m/s and its range covered is 10√3m, the angle for the maximum time of flight will be: A. 30⁰ B. 60⁰ C. 90⁰ D. 120⁰
A glass flask whose volume is 1000.00 cm³ at 0.0°C is completely filled with mercury at this temperature. When flask and mercury are warmed to 55.0°C, 8.95 cm³ of mercury overflow. If the coefficient of volume expansion of mercury is 18.0x10-5 K-1. compute the coefficient of volume expansion of the glass-Answer: 1.7x105 (Co)-1
A metal cube has edges of length a=10 cm, at a temperature of 0°C. When heated to 100°C, the volume of the cube is 1005.1 cm³. Determine the coefficient of linear expansion of the metal.