Why do scientists believe that dark matter exists even though it cannot be seen?

Which of the following weighing balances performs measurement in a closed compartment with no air currents to disturb measurement? Spring balance Analytical balance Hydraulic balance

A wire 0.80m long carrying a current of 3.2A is perpendicular to a 0.15T magnetic field (B field). What is the force on the wire? (Use F=BIL to solve!) Input answer with 3 decimal places (for example: 555) and do NOT include the units! E

Is it possible for a gas contained in a chamber to maintain a constant temperature while heat is being added to the gas? Explain why or why not.

Why are L waves not usually seen on a seisogram?

Which form of precipitation is defined as raindrops that bounce when they strike a surface? a. Snow c. Fog b. Hail d. Sleet

When considering different hypothesis usually the scientific explanation which can account for all the is

Similarities between mechanical and electromagnetic waves are

Suppose you're given the formula r = s 2t. if you know that s is three times greater than t, how could you rewrite the formula

A merry-go-round rotates with a centripetal acceleration of 15 m/s2. If the outer horses are 7 m from the center of the ride, what is their velocity? O A. 11.8 m/s O B. 10.2 m/s O O C. 9.6 m/s D. 8.4 m/s

Which is not a part of the walking mechanism of the human body? a rigid bar a fulcrum a resistance a gear