Hardness may be defined as the resistance of a material to scratching.

a. True

b. False

How could you write an equation for average velocity that would work for finding the average velocity of any object?

In a movie, the heroine saves the day by cutting a wire before the time runs out on a timer. How did she change the circuit? She changed a short circuit to an open circuit. She changed an open circuit to a closed circuit.

A vibrating drum is an example of what kind of energy? 1) Nuclear 2) Chemical 3) Mechanical 4) Electrical

What is the physical state of water at 250°C?

A battery charger is connected to a dead battery and delivers a current of 8.9 A for 4.7 hours, keeping the voltage across the battery terminals at 12 V in the process. How much energy is delivered to the battery?

A provides resistance in an electric circuit. a. wire b. light bulb c. switch. d. battry

Why is it good for scientist to be skeptical

Which of the following describes a scientific law? A. based of scientific evidence B. explains how and why nature does what it does C. not based of scientific evidence

Before leaving her home, Myesha makes sure that every electrical appliance is unplugged and checks that every window and door is securely locked. She checks everything seventeen times according to a strict ritual that she has worked out.

a minibus drives 238 miles with a constant speed of 84 mph and another 80 miles with a constant speed of 60 mph. how much time in total does it take to travel these distance?