A vibration platform oscillates up and down with a fixed amplitude of 9.7 cm and a controlled frequency that can be varied. If a small rock of unknown mass is placed on the platform, at what frequency will the rock just begin to leave the surface so that it starts to clatter?

Jenna swam 8 laps in the pool. She swam backstroke for one-quarter of the laps. How many laps did Jenna swim doing the backstroke? the distance between a number and 2 on the number line. The temperature in February was at most 6F. Use t as your variable. can someone help me? I can't seem to factor out this equation.40x squared -46x +12 List the Big Four countries? The organization of this passage can be improved by (1) Crackers can be made by first mixing flour, baking powder, salt, water, and oil. (2) This forms dough, which is then flattened onto a cookie sheet. (3) Then, the squares of dough go into the oven for 10 to 12 minutes. (4) A knife is used to cut the flattened dough into squares. (5) Finally, they become crispy crackers.A. moving sentence 2 to after sentence 3.B. moving sentence 5 to after sentence 1.C. moving sentence 3 to after sentence 5.D. moving sentence 4 to after sentence 2. Describe the movement of the dominoes as energy is transferred through them and then compare the movement of longitudinal waves to the movement of the dominoes. Record your evidence. Pls help this is due in 20 min PLS HELP PLSSSSS PLSSSSSS PLSSSSSSSS PLSSSSSSSSSSSSSS HIRRRYYYYYYYYYYYYYYYYYYYYYYYY PLS HELP I WILL DO ANYTHING Hernando builds a simple DC series circuit with a standard D-cell battery and uses an ammeter to determine that the total current in the system is 3.0 A. In an attempt to increase the brightness of the bulbs in the circuit, he tries to increase the voltage by adding two more batteries (in series with the first). Calculate the new current when driven by three batteries. who believed senators should have lifetime? 3ab3(-4b3 + 2b2a - 7) = Which of the following best describes the difference between metals and nonmetals? ametals tend to have low melting points and nonmetals have high melting points bnonmetals are more reactive than metals cmetals are brittle and dull dmetals have high melting points and are malleable, whereas, nonmetals have lower melting points and tend to be brittle. Solve each equation. d(d+3)-d(d-4)=9d-16 What is 190% of 69.70? You are a frightened owl Blinded by the light of lifesimilemetaphorhyperbolepersonification An ice cube tray has 12 sections. Each section has the shape of a 3 m cube. What is the volume of water used to fill the tray? Who were some of the "new" immigrants in the 1920s?A) Slavic peoplesB) Northern Irish.C) GreeksD) GermansE) PolesF) Southern ItaliansG) Russian Jews