Can someone please help me out

In the nineteenth century, gregor mendel first determined some basic rules of genetics that have been observed throughout all types of life. no observations have disproved these basic rules of genetics. charles darwin developed the idea of biological evolution around the same time, but he was unaware of mendel’s discoveries in genetics. over a century later, darwin’s idea of evolution was modified in order to incorporate mendel’s rules of genetics along with the other evidence that darwin had used. what is most likely the relationship between mendel’s rules of genetics and darwin’s idea of biological evolution? a.)mendel’s genetics states laws that are now part of the theory of biological evolution.b.)biological evolution states laws that are part of mendel’s theory of genetics.c.)mendel’s genetics replaced darwin’s entire concept of biological evolution.d.)biological evolution is a law that explains why all genetics exist.

An electromagnetic wave with frequency 65.0 hz travels in aninsulating magnetic material that has dielectric constant 3.64 andrelative permeability 5.18 at this frequency. the electric fieldhas amplitude 7.20 \times 10^{ - 3} {\rm v}/{\rm m}. a. what is the speed of propagation of the wave? b.what is the wavelength of the wave? c.what is the amplitude of the magnetic field? d.what is the intensity of the wave?

Which phenomenon is caused by the magnetic field of the earth? a. magnets sticking to the steel door of a refrigerator b. one end of a magnetized needle pointing to the north c. iron becoming magnetized when rubbed with a strong magnet d. some magnets losing their magnetism when struck with a hammerlisa is standing outside her school. if an ambulance is approaching the school at fifty miles per hour with its siren on, how will the way lisa hears the sound compare to the way the driver of the ambulance hears the sound? a. lisa will hear the sound at a higher pitch than the driver. b. the driver will hear the sound after lisa hears the sound. c. lisa will hear the sound at the same wavelength as the driver. d. the driver will hear the sound at a higher frequency than lisa.what is the difference between an electromagnet and a bar magnet? a. a bar magnet's magnetic field is a perfect circle. b. a bar magnet weighs less than an electromagnet. c. an electromagnet's magnetic field can be switched on and off. d. an electromagnet has only one pole while a bar magnet has two.which statement accurately describes gravitational force? a. it is weak and long-ranged. b. it is strong and long-ranged. c. it is weak and short-ranged. d. it is strong and short-ranged.which of the following statements about magnets and magnetism is true? a. the north pole of a magnet is attracted to the south pole of another magnet. b. the north pole of a magnet can magnetize iron but the south pole cannot. c. the poles of a magnet result from the magnetic domains pointing in different directions. d. the poles of a magnet have weaker magnetic forces than the center of a magnet.the moving company loaded a crate that weighed 1800 n into a truck that was 1 meter off of the ground. they used a force of 600 n to push it up a ramp that had a slope of 4 meters. what was the efficiency of the moving company's ramp? a. 57% b. 68% c. 75% d. 86%which statement best explains why machines are inefficient? a. energy transfer in compound machines gives off electrical waste. b. during energy transfer in machines, some energy is always lost as heat. c. balanced forces in moving machines produce waste in the form of steam. d. when work is done by machines, gravity always causes a decrease in force.