Master Physics with Fun Quizzes & Brain Teasers!

what is the wavelength of 2.6 million Hz ultrasound as it revealed through human tissue ?
1 Answer
what is the trend on the graph
1 Answer
Beta radiation requires _____ to be stopped.Question 17 options:paperglassaluminumlead
1 Answer
its a vector quantity that is defined as the rate at which the object changes its velocity
1 Answer
A 72-kg boy and a 48-kg girl, both wearing ice skates face each other at rest on a skating rink. The boy pushes the girl, sending her eastward with a speed of 6.8 m/s. What is the speed and direction of the boy?
1 Answer
What is the frequency of ultraviolet light with wavelength 2.94 x 10^-8 m? (c= 3.00 x 10^8 m/s)
1 Answer
5 m/s10 m/s15 m/sA rollercoaster was moving from point A to B, and then to C, with the instantaneousvelocity 5m/s, 15m/s, and 10m/s, respectively. The instaneous velocity at a pointbetween B and C could bek less than 5m/s.vil less than 10m/s.greater than 10m/s.greater than 15m/s.
1 Answer
Why is total solar eclipse a worthwhile experience?A. You can see the coronaB. Stars becomes visible in the day time sky C. It does not happen very oftenD. All of the above make it a worthwhile experience
1 Answer
Why is the size of a telescope's lens or mirror important for gathering information about distant objects?A. Because magnification is better with smaller lenses.B. Because big telescopes are hard to manage.C. Because the goal is to gather as much electromagnetic radiation as possible.
1 Answer
(a). A particle, whose acceleration is constant, is moving in the negative x direction at a speed of 4.36 m/s, and 10.9 s later the particle is moving in the positive x direction at a speed of 7.94 m/s. Find the acceleration?(b). what will be the velocity 10.9 second before it was moving in the negative x directionat the speed of 4.36 m/s(c). when is the particle at rest. express this answer as a time in seconds elapsed since it was moving in the negative x-direction at a speed of 4.36 m/s.
1 Answer
1. Which of the below would be a correct formula for pressure. (L=length, W =width, H = height, R = radius, m=mass, g=gravity acceleration) *
1 Answer
(Solve & simplify the answer. Type an integer or a fraction. Type your answer in the form a+b i.)
1 Answer
You throw a ball horizontally with an initial speed of 15 m/s from a height of 1.5 meters. How long does it take the ball to land? a) 0.55 seconds b) 0.39 seconds c) 6.53 seconds d) 0.15 seconds In the previous question, How far in front of you does the ball land? a) 1.5 meters b) 9.7 meters c) 8.3 meters d) 6.6 meters
1 Answer
2. A bar magnet is divided in two pieces . Which of the following statements is true about the force between the broken pieces if they face each other with a small separation ? A. There is an electric repulsive force between the broken pieces B. There is an electric attractive force between the broken pieces C. There is a magnetic repulsive force between the broken pieces D. There is a magnetic attractive force between the broken pieces .
1 Answer
A plane is travelling at an average speed of 325 km/h. How far does the plane travel (km) in 30.0 minutes?
1 Answer
What happens to the period of a pendulum if the frequency is halved?
1 Answer
A Theme park wants to build a roller coaster with the maximum velocity of 33.5 MS (75 mph ) how high Must the first hill be in order to reach the maximum velocity?
1 Answer
What force causes a notebook to start moving what force causes the notebook to stop moving when you slide it across a table or desktop?
1 Answer
Aston buys a $9,200 motorcycle on a deferred payment plan. There is no down payment and no interest for 24 months. Jerry must make a minimum payment of $75 a month for the first 23 months. To avoid a retroactive rate of 21%, he must pay the balance in full at the end of 24 months. If he pays $75 each month, how much should he pay the last month to avoid the interest charges?
1 Answer
What happens when one light bulb in a series circuit burns out.A. The rest of the bulbs continue to workB. Nothing will happenC. The rest of the bulbs become dimD. It breaks the circuit
1 Answer
When a light beam is reflected, the angle of...Select one:a. incidence is equal to the angle of reflection.b. refraction equals the angle of reflection.c. reflection is greater than the angle of incidence.d. reflection is smaller than the angle of incidence.
1 Answer
Write the velocity of the cue ball after the collision in component form. What is the x-component of the velocity of the eight ball after the collision?What us the y-component of the velocity of the eight ball after the collision. At what angle does the eight ball travel after the collision What is the magnitude of the eight balls velocity after the collision?
1 Answer
Please help me to answer and explain how you get the answer to number 11. Thank you.
1 Answer
A girl coasts down a hill on a sled, reaching a level surface at the bottom with a speed of 7 m/s. The coefficient of kinetic friction between runners and snow is 0.042, and the girl and sled together weigh 764 N. The acceleration of gravity is 9.8 m/s. How far does the sled travel on the level surface before coming to a rest? Answer in units of m.
1 Answer