Which of the following is an element?

a. salt

b. iron

c. nylon

d. sand

28) Q: A: You are sitting in a car that isn't moving; suddenly, the car quickly accelerates. Your body seems to be pushed back against the seat. Which word best explains why your body seemed to be pushed backward against the seat?

Select the correct statement to describe when a sample of liquid water vaporizers into water vapor

To a cyclist riding west at 20 kg/hr, the rain appears to meet him at an angle of 45° with the vertical. When he rides at 12 km/hr, the rain meets him at an angle of 19°48' with the vertical. What is the actual direction of the rain?

A 15-kg bicycle carrying a 50-kg boy is traveling at a speed of 5 m/s. What is the KE of the bicycle and the boy?

Where can you find a biodiversity hot spot in the United States? A. Nebraska B. California C. Texas D. Virginia

ngrid kicks a football with an initial velocity of 12 m/s at an angle of 45° relative to the ground. The horizontal component of the initial velocity to the nearest tenth is m/s.

A 60-watt light bulb has a voltage of 120 volts applied across it and a current of 0.5 amperes flows through the bulb. What is the resistance of the light bulb?

In a laboratory experiment, a diffraction grating produces an interference pattern on a screen. If the number of slits in (including the slit spacing) the same, then The fringes stay the same brightness and get closer together.

The gravitational potential has a zero value gravitational field in the same place is? Maximum or null indeterminate

In four-seater countries, temperature drops below 0 ° C during peak winter. Why only the frozen surface of the water instead of the whole river and the lake freezes?