Question

According to four-dimensional geometry, the angles of a triangle add to 180°

(a) always.

(b) sometimes.

(c) never.

(d) on planet Earth only.

Expert Answer

Want to see the step-by-step answer?

Check out a sample Q&A here.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

*Response times may vary by subject and question complexity. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers.
Tagged in
Science
Physics

Other

Related Physics Q&A

Find answers to questions asked by students like you.

Q: Choose the BEST answer to the following: The period of a 10-Hz wave is (a) 1/10 s. (b) 1.0 s. (c) 10...

A: The relationship between period and frequency is

Q: Choose the BEST answer to the following: In a series circuit, if the current in one lamp is 2 A, the...

A: Answer:  bi,e 2A

Q: Choose the BEST answer to the following: The vibrations in a longitudinal wave move in a direction (...

A: Longitudinal waves are waves produced in a medium that are parallel to the direction of propagation.

Q: Choose the BEST answer to the following: A torque is a force (a) like any other force. (b) multiplie...

A: Torque is the winding force that tends to cause rotation.Mathematically it can expressed as

Q: A student draws the free body diagram shown below. Based on this diagram, the net force on the objec...

A: Length of the vectors gives magnitude. Along the vertical direction, the length of vectors represent...

Q: A 16-kg sled is being pulled along the horizontal snow-covered ground by a horizontal force of 24 N....

A: Click to see the answer

Q: Choose the BEST answer to the following: Standing waves are the result of (a) interference. (b) wave...

A: Standing waves are also called stationary waves. They are produced in a medium when reflected waves ...

Q: A rigid bar of mass 25 kg is supported symmetrically by three wires each 2.5 m long. Those at each e...

A: The expression for the Young’s modulus,

Q: An electron is released from rest in a uniform electric field of magnitude 3.51 ✕ 104 N/C. Calculate...

A: Let m be the mass of the electron, q be the charge on electron, E be the electric field, a be the ac...

Q: What magnitude point charge (in C) creates a 10,000 N/C electric field at a distance of 0.200 m? How...

A: Click to see the answer

Q: A new ride being built at an amusement park includes a vertical drop of 71.6 meters. Starting from r...

A: The potential energy of the cart-passengers system can be calculated as,

Q: How much energy must be removed from a 500g block of ice to cool it from 0C to -40C? The specific he...

A:  Given:Mass of the block, m = 500 gSpecific heat, c = 2090 J.kg.KChange in temperature, ∆t  = -40 – ...

Q: Consider the following 3 pieces of the motion for a block that is initially at rest on a floor. (1) ...

A: Click to see the answer

Q: The positive and negative plates of a parallel-plate capacitor have an area of 3.05 cm by 3.05 cm. T...

A: Click to see the answer

Q: Choose the BEST answer to the following: A satellite in Earth orbit is above Earth’s (a) atmosphere....

A: If a satellite escapes the gravitational field, it cannot orbit.

Q: Choose the BEST answer to the following: Black is the combination of (a) all the colors together. (b...

A: The black colour is formed when an object absorbs the radiation of all the colors, as an ideal black...

Q: How does the Moon’s diameter compare with the distance between Earth and the Moon?

A: Answer: The moon's diameter is 1/100 the distance between Earth and the moon.

Q: Choose the BEST answer to the following: Huygens’ principle for light is primarily described by (a) ...

A: According to the principle of Huygens "each point of the wavefront is the source of a secondary dist...

Q: Choose the BEST answer to the following: To say thatE=mc2 is to say that energy (a) increases as the...

A: As per the energy mass equivalence equation, the mass of the object can be converted into energy and...

Q: Choose the BEST answer to the following. If an iron nucleus split in two, its fission fragments woul...

A: Iron has a most stable nucleus in the present elements; therefore, for the fission reaction of iron,...

Q: A projectile is launched from ground level to the top of a cliff which is 195 mm away and 135 mm hig...

A: Let v be the velocity of the projectile which is fired at an angle theta, h be the height of the cli...

Q: Gold, which has a density of 19.32 g/cm3, is the most ductile metal and can be pressed into a thin l...

A: Consider the mass of the Gold as 1.915g.Find the volume of the gold formed into a thin leaf.

Q: What is kinetic energy of gas molecule per degree freedom?

A: Click to see the answer

Q: A jet airplane travelling at the speed of 500 km h-1 ejects its products of combustion at the speed ...

A: Given

Q: Choose the BEST answer to the following: When the shadow of the Moon falls on Earth, we have a (a) l...

A: An eclipse is happening when the shadow of an object falls on another object, if the shadow of the E...

Q: Choose the BEST answer to the following: The electric field inside the dome of a Van de Graaff gener...

A: The electrons inside the dome repel each other and they reach the domes outer sphere. This way the i...

Q: A LASER is a source of very intense, monochromatic, and unidirectional beam of light. These properti...

A: Click to see the answer

Q: Choose the best answer to the following: How many electrons are there in the third shell of sodium, ...

A: Answer:  b 

Q: A ball of radius r is made to oscillate in a bowl of radius R. Find its time period of oscillation.

A: The relation between the time period and the length is given by

Q: Choose the BEST answer to the following: Newton’s law of cooling applies to objects that (a) cool. (...

A: Step 1Newton’s law of cooling states that the rate of heat lost by body is directly proportional to ...

Q: You pull your t-shirt out of the washing machine and note that 3500 particles have become attached, ...

A: The expression for the number of electron is,

Q: Choose the BEST answer to the following: Lift a 100-N crate with an ideal pulley system by pulling a...

A: Step 1Work done by a body is the product of force on it and the displacement produced by it.Let F be...

Q: At a certain speed on a bus, its whole body starts vibrating strongly.Explain.

A: At certain bus speed the frequency of the bus engine is equal to its natural frequency and therefore...

Q: A particle executes SHM of period 8s. After what time of its passing through the mean position, will...

A: Now, let , A and y be the angular frequency, amplitude and displacement from the mean position

Q: At what temperature the kinetic energy of gas molecules is zero?

A: The kinetic energy of gas molecules is directly proportional to the temperature.

Q: Four identical hollow cylindrical columns of mild steel support a big structure of mass 50,000 kg. T...

A: Click to see the answer

Q: Choose the best answer to the following: In a vacuum, an object has no (a) buoyant force. (b) mass. ...

A: The mass of the object is constant everywhere. The weight of the object depends on its mass and the ...

Q: A body of mass 0.1kg is executing SHM of amplitude 1.0m and period 0.2s. What is the maximum value o...

A: The displacement of a SHM is

Q: Choose the BEST answer to the following: Your friend states that under all conditions, any radio wav...

A: Radio wave is an electromagnetic wave with low frequency and it is transverse in nature. Sound wave ...

Q: Choose the BEST answer to the following: The power required to raise a 100-kg crate a vertical dista...

A: Given:Mass=100kgvertical distance =2mTime=4s

Q: At what point along the path of a simple pendulum is the tension maximum?

A:  Tension in the string at any point is given by,

Q: Choose the BEST answer to the following. Radioactivity has been around on Earth since the (a) middle...

A: Radioactivity is defined as the emission of particles from nuclei due to instability which arises as...

Q: Choose the BEST answer to the following: What Einstein discovered about space and time is that they ...

A: In 4Dreality, Space-Time is consisting of 3D (Length, Width and Height/Depth) and Time coordinates t...