Which lenses are convex? Check all that apply. 1 2 3 4 5 6

According to Newton's second law of motion, force equals mass times acceleration (F = ma). Given that a car has a mass of 3,000 kg, how much force would be needed to accelerate it 2 m/s²? A 1,500 N B 6,000 N C 3,000 N D 1,000 N

A 5kg ‏ Of copper specific heat capacity = 385j/kg C at 20 c is given 46200 j of energy what will be the final temperature

Which of the following are properties of mechanical waves a) energy is transferred with the motion of wave b) waves begin at a source with a disturbance c) waves require a medium or material to move through d) particles of a medium always move

What is the range of sound frequency for human and what does it mean for sounds lower or higher than the range

Why is the study of black holes important?

A helium-filled balloon is launched when the temperature at ground level is 27.8°c and the barometer reads 752 mmhg. if the balloon's volume at launch is 9.47 * 10^{4} 4 l, what is the volume in liters at a height of 36 km, where the pressure is 73.

Consider the moment when the spring is at its maximum compression. At that moment, the kinetic energy, the gravitational potential energy, and the elastic potential energy are, respectively, a - zero, at a maximum, and at a maximum b - at a maximum,

Ari, a young patient who is regularly treated by a psychiatrist, feels compelled to carry out repetitive tasks the same way very frequently. If Ari does not conduct these tasks with extreme precision, he can feel extremely nervous and uncomfortable.

A friend says, "Stars produce energy by a fusion chain reaction of helium into hydrogen." Evaluate the validity of this statement. A) It is an valid statement. Stars produce energy by a fusion chain reaction of hydrogen into helium.

If the mass of a material is 42 grams and the volume of the material is 15 cm^3, what would the density of the material be? answer: Unit: