A robin pulls on a worm with a force of 7 N. A bluebird pulls on the same worm with a force of 9 N. If the angle between the birds is 90 degrees, what is the magnitude of the net force on the worm

A. 3.7 N

B. 4.0 N

C. 5.6 N

D. 11.4 N

What amount of heat is required to raise the temperature of 25 grams of copper to cause a 15º C change? The specific heat of copper is 0.39 J/gº C. 115 J 150 J 250 J 300 J

The four giant gas planets that are made primarily of lightweight elements are A. Venus, Saturn, Uranus, and Neptune. B. Mercury, Venus, Earth, and Neptune. C. Jupiter, Saturn, Uranus, and Neptune. D. Earth, Saturn, Neptune, and Venus.

Two pure tones are sounded together. The drawing shows the pressure variations of the two sound waves, measured with respect to atmospheric pressure, where t1 = 0.0220 s and t2 = 0.0242 s. What is the beat frequency?

On a night when the moon rises at 9 pm, what is its phase?

I am looking for this answer : Which shows a correct order of steps in the scientific method? develop a hypothesis, analyze data, make observations, draw conclusions make observations, draw conclusions, develop a hypothesis, analyze data.

Block 1 and Block 2 have the same mass, m, and are released from the top of two inclined planes of the same height making 30 degree and 60 degree angles with the horizontal direction, respectively.

Water waves change direction when they encounter water of different depths and begin to move at different wave speeds. This is called A. reflection B. constructive interference C. the Doppler effect D. refraction

Along with an alpha particle what other product is produced in the alpha decay of americium-241

What does Newton's second law of motion say

Two sinusoidal waves are moving through a medium in the positive x-direction, both having amplitudes of 7.00 cm, a wave number of k=3.00m-1, an angular frequency of ω=2.50s-1, and a period of 6.00 s, but one has a phase shift of an angle ϕ=π12rad.