If you have 200.0 g of radioisotope with a halflife of 5 days, how much isotope would remain after 15 days?

A dolphin emits ultrasound of 100kHz and uses the timings of reflection to determine the position of objects in the water. What is the wavelengths of this ultrasound? Note the speed of sound in water is 1480m/s.

Examples of balanced forces in a room

An 18-year-old runner can complete a 10.0 km course with an average speed of 4.55 m/s. A 50-year-old runner can cover the same distance with an average speed of 4.05 m/s.

Suatu larutan penyangga dibuat dengan mencampurkan 50mL larutan H3PO4 1 M dengan 50mL larutan NaOH 0,5 0 berapakah pH larutan Itu?

The sun emits electromagnetic waves at many frequencies, but mostly in the infrared, visible, and ultraviolet spectrums. what kind of energy is this?

More damage is done and more life is endangered in a head-on collision of two cars, each traveling at 30 mph, than in a car crashing into a brick wall at 30 mph because:

The metric system is now known as the international system of units. a. T b. F

Technician A says that torque-to-yield head bolts are special bolts that are reusable. Technician A says that main bearing clearance can be calculated by knowing the inner diameter of the main bearing and the outer diameter of the main journal.

Which condition describes an object having terminal velocity? a. gravity > air resistance b. gravity < air resistance c. gravity = air resistance

All objects that have mass have gravity, and gravity pulls objects toward each other. A pencil has mass, and so does your hand. Yet a pencil drops to the floor when you let go of it. Why doesn't the pencil stick to your hand instead?