When you drop a penny off the roof of a building, it takes 10 seconds to reach the ground. How high is the roof?

You are designing a lathe motor, part of which consists of a uniform cylinder whose mass is 130 kg and whose radius is 0.40 m that is mounted so that it turns without friction on its axis, which is fixed.

In the following diagram, the voltage is 1.5 volts and the resistance is 3.0 ohms. Use Ohm's law to determine the current in the circuit. A) 0.50 amps B) 4.5 amps C) 2.0 amps D) 1.5 amps

You mix two clear solutions, instantly your see a bright yellow precipitate form. What type of reaction did your just observe

This famous scientist conducted experiments that led to the development of the Plum Pudding atomic model.

Describe what surprised you most about one of the key findings

Convert 4,200 decigrams to grams

A beam of light is incident upon a flat piece of glass (n = 1.50) at an angle of incidence of 30.00. Part of the beam is transmitted and part is reflected. Determine the angle between the reflected and transmitted rays

A 29 foot ladder leans against a building so that the angle between the ground and the ladder is 75 ∘. How high does the ladder reach up the side of the building? Round to 2 decimal places.

What is a difference between an isotope and a ion

2. An airplane travels 335 miles in 45 minutes. How fast does it travel? How fast is that in km/hr?