A student has arms of length 63 cm. What is the minimum angular velocity (in rad/s) at which a bucket of water can be swing to prevent spilling water? The distance from the handle to the standard water level in the bucket is 20 cm.

April 1, 2020// Blog//

Search Posted in Physics Please login to view the answer Login Join us Related Questions Posted in Physics At what distance along the z-axis is the electric field strength a maximum? Please login to view the answer Login Join us Posted in Physics How does variation in the measuring device (instrument) effect the measurements...

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If a car is traveling on the highway at a constant velocity, the force that pushes the car forward must be

April 1, 2020// Blog//

Search Posted in Chemistry Please login to view the answer Login Join us Related Questions Posted in Chemistry Find the number of moles in 300 g of carbon dioxide. Please login to view the answer Login Join us Posted in Chemistry What is a correct statement of Newtons second law? a. When an object experiences

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A snowmobile has an initial velocity of 3.0 m/s Part 1: If it accelerates at the rate of 0.5 m/s/s for 7.0 sec, what is the final vel.? Part 2: If it accelerates at the rate of -0.60m/s/s, how long will it take to reach a complete stop?

January 27, 2020// Blog//

1.  You can never prove a theory. All theories and laws and scientific knowledge in general is provisional. If your theory is inconsistent with an experiment (and you are sure the experiment is correct), your theory needs to be pitched or modified. 2.  change the meters to kilometers;  120 m/km = .12 km/km = .12  or...

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What is the vertical acceleration of a paper airplane that is launched horizontally with an initial velocity of 2.3 m/s?

October 14, 2019// Blog//

Angular momentum is given by the length of the arm to the object, multiplied by the momentum of the object, times the cosine of the angle that the momentum vector makes with the arm. From your illustration, that will be: L = R * m * vi * cos(90 – theta)  cos(90 – theta) is just

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A ship's course is set at a heading of 192°, with a speed of 30 knots. A current is flowing from a bearing of 112°, at 14 knots. Use Cartesian vectors to determine the resultant velocity of the ship.

October 13, 2019// Blog//

A ship’s course is set at a heading of 192°, with a speed of 30 knots. A current is flowing from a bearing of 112°, at 14 knots. Use Cartesian vectors to determine the resultant velocity of the ship.

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A parachutist with a camera descends in free fall at a speed of 10m/s. The parachutist releases the camera at an altitude of 50m. A) How long does it take the camera to reach the ground? B) What is the velocity of the camera before it hits the ground?

October 13, 2019// Blog//

The bullet has a certain pre-impact momentum, p(bul), that is given as the product of the bullet’s mass, m(bul), and it’s pre-impact velocity, v(bul)  p(bul) = m(bul) x v(bul)  Since the block is at rest prior to being struck, its original momentum is 0 kg*m/s. The total momentum of the system pre-impact is...

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As a certain object falls, its position s (in meters) above ground after t seconds is given by s(t)=20-5t^2. Whats the average velocity of the object on the interval from t=1 to the time .5 seconds later?? from t=1 to the time .1 seconds later?

October 13, 2019// Blog//

Answer: The spring constant of the spring is 11.65 N/m Explanation: It is given that, a 50 g mass hanger hangs motionless from a partially stretched spring. When a 65 gram mass is added to the hanger, the spring stretch increases by 10 cm. Initial mass, m = 50 g = 0.005 kg Final mass,

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The position of a particle moving along the x axis varies in time according to the expression x = 4t 2, where x is in meters and t is in seconds. Evaluate its position at the following times. (a)t=2.10s ______m (b)t=2.10s +Δt xf=________m (c)Evaluate the limit of Δx/Δt as Δt approaches zero to find the velocity at t = 2.10 s. _______m/s …?

October 13, 2019// Blog//

Answer: The spring constant of the spring is 11.65 N/m Explanation: It is given that, a 50 g mass hanger hangs motionless from a partially stretched spring. When a 65 gram mass is added to the hanger, the spring stretch increases by 10 cm. Initial mass, m = 50 g = 0.005 kg Final mass,

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1. You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30 m/s. The ball has ______________________ energy. Calculate it. 2. A baby carriage is sitting at the top of a hill that is 21 m high. The carriage with the baby weighs 12 N. The carriage has ____________ energy. Calculate it. 3. A car is traveling with a velocity of 40 m/s and has a mass of 1120 kg. The car has ___________energy. Calculate it.

October 12, 2019// Blog//

There are four variables which govern changes in population size. births deaths immigration emigration A population gains individuals by birth and immigration and loses individuals by death and emigration. Biotic Potential Populations vary in their capacity to grow. The maximum rate at which a population can increase when...

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Darlene kicks a soccer ball off the ground and in the air with an initial velocity of 34 feet per second. Using the formula H(t) = _16t2 + vt + s, what is the maximum height the soccer ball reaches? 17.7 feet 18.1 feet 19.3 feet 20.2 feet

October 11, 2019// Blog//

1. B. the ability to do work In fact, energy is exactly defined as the ability to do work: for example, if the gravitational potential energy of an object is 100 J, it means that it can converts this energy into work done. 2. The form of energy changes, but the total energy remains the

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