Michelle swings a 0.009-kg rubber stopper around her head. The rubber stopper is tied to a string that Michelle holds at 0.72 m while swinging it once every 0.5s. What is the minimum force she needs...

Michelle swings a 0.009-kg rubber stopper around her head. The rubber stopper is tied to a string that Michelle holds at 0.72 m while swinging it once every 0.5s. What is the minimum force she needs...

a hiker throws a ball horizontally from a hill 21.0 m high. The hiker's height is 1.750 m. The magnitude of the horizontal velocity is 7.0 m/s. Find the distance between the base of the hill and the...

The moon has an average radius of 1.74x10^6 m. A 68.kg person on the moon's surface weighs only 110 N. What is the mass of the moon?

Q: what type of force is gravity? Q: Two marbles are rolling horizontally on a table. The red marble travels at 1.22 m/s, while the blue marble travels at 1.67 m/s. If both roll off the table at the...

Michelle swings a 0.009-kg rubber stopper around her head. The rubber stopper is tied to a string that Michelle holds at 0.72 m with a force of 21. N. If she lets go of the string, what is the...

A pole-vaulter of mass 75 kg reaches a maximum speed of 7 m/s just before he jams his pole into the notch to launch himself over the bar. Assuming that his pole is only 80% efficient, what is the...

Question 1 A Geiger counter gets 8000 counts per minute from a certain source with a half-life of 5 years. How many years until its activity is 1000 counts per minute? Question 2 The...

I am not sure what equation to use to solve this. I understand this is fairly simple, but just want to make sure I am doing it right.

A 2.95-kg object is moving in a plane, with its x and y coordinates given by x = 3t2 − 2 and y = 4t3 + 3, where x and y are in meters and t is in seconds. Find the magnitude of the net force acting...

Q1: Assume that a satellite orbits earth 230,000 m above its surface. given that the mass of earth is 5,97 x 10^24 kg, and the radius of earth is 6.38 x 10^6 m what is the satellite's period? Q2: Consider...

Light with a frequency of 6.1*10^14 Hz is measured from a star. This type of star is known to produce light with a frequency of 6.0*10^14 Hz. How fast is the star moving away from toward Earth?

Part a is as follows: A long cylindrical insulator has a uniform charge density of 1.89 μC/m3 and a radius of 5 cm. What is the electric field inside the insulator at a distance of 4 cm?...

A 50 loop circular coil has a radius of 0.03 m. It is oriented so that the field lines of a magnetic field are normal to the area of the coil. Suppose that the magnetic field is varied...

Besides the gravitational force, a 3.35-kg object is subjected to one other constant force. The object starts from rest and in 1.20 s experiences a displacement of (4.15î − 3.30ĵ) m, where the direction...

A slotted link is rotating about fixed pivot O with a counterclockwise angular velocity of 3 rad/s, and a clockwise angular acceleration of 2 rad/s2. The movement of the link is causing a rod to slide...

Please help me in this question i dint understand about the dot product in A.divergent gradient.

I can't understand it :(

when do I use the absolute value brackets on the point charge? E = k (q)/r^2 vs E = k |q|/r^2 ?

A compact car, mass 825 kg, moving south at 15 m/s, is struck by a full-sized car, mass 1588 kg, moving east at 12 m/s. The two cars stick together, and momentum is conserved in the collision. A.Find...

Two objects slide over a frictionless horizontal surface. The object A with a mass of 5000g is moves at a speed of 4.5m/s toward the object B (mB= 2500g) which is initially at rest. After the collision,...

Dr. Anthon S.

Best Results By Perfect Score SAT/ACT Tutor! Math, Physics and more!

New York, NY

5.0
(456 ratings)

Robert E.

Experienced Physics and Math Tutor

Jamaica, NY

4.9
(480 ratings)

Juan R.

Algebra, Trig, Calculus, and College Math

Forest Hills, NY

5.0
(84 ratings)