Classify each of the following mixtures as homogeneous or heterogeneous: a mixture of oil and water air cereal in milk a glass of tea

1Why is the lithium atom electrically neutral?

Sound waves often bend around colunms in large concert halls. Is this a results of refraction or diffraction?

If you're ever standing on a mountaintop when a dark cloud passes overhead and your hair stands up, get off the mountain fast. How would your hair have acquired the charge to make it stand up?

If a train of pulses moves into shallower water as it approaches a shore, A. The wavelength increases. B. The wavelength stays the same. C. The wavelength decreases.

When asked to name all the forces on a marker sitting in equilibrium on a desk, a student responds: "Since the marker on the desk is at rest, there are no forces acting on it." Why is this wrong? How would you restate it?

Rainwater was collected in water collectors at thirty different sites near an industrial basin and the amount of acidity (pH level) was measured. The mean and standard deviation of the values are 4.60 and 1.10 respectively.

A hot air balloon is rising straight up at a constant speed of 7 m/s. when the balloon is 12.0 m/s above the ground, a gun fires a pellet straight up from ground level with an initial speed of 30.0 m/s.

The atmosphere is an). O element O molecule O mixture O compound

What is the velocity of the car, in meters per second, just after it hits a 135-kg deer initially running at 10.5 m/s in the same direction? Assume the deer remains on the car.

True or false the metric unit used to describe weight as a measure of the force of gravity is called a newton