Question
A child walks 25 feet towards North, turns right and
walks 40 feet, turns right again and walks 45 feet. He then turns left and walks 20 feet. He turns left again walk 20 feet. Finally, he turns to his left to walk another 20 feet. In which direction is the child from his starting point?Solution
A lens forms an image of magnification -2. If the object is placed 15 cm from the lens, what is the image distance?
In MRI machine, which one of the following is used?
If the vector sum of torques acting on a system is zero, then the object is in:
Which type of mirror is used in car headlights?
The phenomenon of interference is based on the principle of:
A porter lifts luggage of 20 kg from the ground and puts it on his head 2 m above the ground. Calculate the work done by him on the luggage (take g = 10...
In a nuclear reaction, the product nucleus has higher binding energy per nucleon than the reactants. Which of the following is correct?
Calculate the work done in moving a charge of 2 C across two points having a potential difference of 12 V.
A block of mass m rests on a smooth wedge of mass M, which in turn rests on a smooth horizontal surface. The wedge is accelerated horizontally with acc...
Which of the following statements is true about energy bands in solids?
